import Editor from '@monaco-editor/react'
import axios from 'axios'
import React, { useCallback, useEffect, useMemo, useRef, useState } from 'react'
import PageTitle from '@/components/shared/PageTitle'
import { Link, useParams } from 'react-router-dom'
import {
  FaArrowLeft,
  FaBolt,
  FaCheckCircle,
  FaArrowDown,
  FaArrowUp,
  FaChevronDown,
  FaChevronRight,
  FaCode,
  FaDesktop,
  FaDatabase,
  FaEye,
  FaEdit,
  FaLayerGroup,
  FaMobileAlt,
  FaMousePointer,
  FaPlus,
  FaPlay,
  FaRedo,
  FaRegSave,
  FaSearch,
  FaSlidersH,
  FaSync,
  FaTabletAlt,
  FaTimes,
  FaTrash,
  FaUndo,
} from 'react-icons/fa'
import { useComponents } from '@/contexts/ComponentContext'
import type { CrudEndpoint, CustomComponent } from '@/proxy/developerKit/models'
import { ROUTES_ENUM } from '@/routes/route.constant'
import apiService from '@/services/api.service'
import { developerKitService } from '@/services/developerKit.service'
import { Button, Notification, toast } from '@/components/ui'
import StyleModal from '@/components/codeLayout/StyleModal'
import VisualCanvas, { DESIGNER_DRAG_TYPE } from '@/components/visualDesigner/VisualCanvas'
import {
  beginDesignerDragSoon,
  endDesignerDrag,
  useDesignerDrag,
} from '@/components/visualDesigner/designerDrag'
import {
  DESIGNER_PRIMARY_EVENTS,
  DESIGNER_SCRIPT_RECIPES,
  DESIGNER_SCRIPT_RECIPE_GROUPS,
  getDesignerCatalog,
  getDesignerEventSnippet,
} from '@/components/visualDesigner/catalog'
import { generateDesignerCode } from '@/components/visualDesigner/codeGenerator'
import DesignerScriptBuilderDialog from '@/components/visualDesigner/DesignerScriptBuilderDialog'
import {
  collectDesignerRefs,
  getSqlDataSourceEvent,
  createDesignerId,
  createEmptyDesignerDocument,
  findDesignerNode,
  isValidDesignerRef,
  renameDesignerRefInNodes,
  renameDesignerRefInScript,
  withDesignerRefs,
  getDesignerBindingColumns,
  getDesignerCollectionProperty,
  getDesignerValueByPath,
  getSqlDataSourceEndpointId,
  getSqlDataSourceKeyField,
  getSqlDataSourceKeyParam,
  getSqlDataSourceKeySource,
  getSqlDataSourcePreviewKey,
  getSqlDataSourceRecord,
  getSqlRecordProperty,
  isDesignerDateComponent,
  isDesignerDateOnlyComponent,
  isDesignerOptionComponent,
  isDesignerTabularComponent,
  isSqlDataSourceNode,
  resolveDesignerResponse,
  toDesignerHttpMethod,
  walkDesignerNodes,
  appendSqlDataSourceQueryParam,
  bindSqlDataSourceUrl,
  hasSqlDataSourceUrlParams,
  DESIGNER_HTTP_METHODS,
  SQL_DATA_SOURCE_KEY_SOURCES,
  SQL_DATA_SOURCE_SLOTS,
  SQL_DEFAULT_VALUE_PROP,
  SQL_DEFAULT_VALUE_TOKENS,
  type DesignerComponentDefinition,
  type DesignerBinding,
  type DesignerDataSource,
  type DesignerDocument,
  type DesignerHttpMethod,
  type DesignerNode,
  type DesignerPropertyInfo,
  type SqlFormValueProperty,
} from '@/components/visualDesigner/types'
import { useLocalization } from '@/utils/hooks/useLocalization'

type WorkspaceTab = 'design' | 'data' | 'code' | 'javascript'
type InspectorTab = 'properties' | 'data' | 'tree'
type DataTestResult = { status: 'loading' | 'success' | 'error'; message: string }
type EndpointResultModal = { source: DesignerDataSource; result: unknown }
type DataField = { path: string; type: string; preview: string }
type StaticSelectOption = { label: string; value: unknown }
type DataSourceCatalogItem = {
  attached: boolean
  key: string
  origin: string
  originType: 'current' | 'component' | 'crud'
  ownerComponentId?: string
  source: DesignerDataSource
}

const DATA_BINDABLE_PROPERTY_NAMES = new Set([
  'items',
  'data',
  'dataSource',
  'options',
  'value',
  'checked',
  'children',
  'content',
  'text',
  'label',
  'title',
  'header',
  'headerExtra',
  'footer',
  'description',
  'placeholder',
  'src',
  'alt',
  'disabled',
  'loading',
])
/**
 * Properties worth binding to a SqlDataSource record column, most used first.
 * A component exposes dozens of props; offering every one of them turns the
 * panel into noise, so only the ones that actually carry record data are listed.
 */
const SQL_RECORD_FIELD_PROPERTIES = [
  'value',
  'checked',
  'children',
  'text',
  'label',
  'title',
  'placeholder',
  'src',
  'url',
  'href',
  'alt',
  'content',
  'description',
  'header',
  'footer',
  'defaultValue',
  'disabled',
]

const getSqlRecordFieldOrder = (propertyName: string) =>
  SQL_RECORD_FIELD_PROPERTIES.indexOf(propertyName)

// Derived from DESIGNER_DATA_COMPONENTS so every toolbox `data` component is
// covered by the static/endpoint panel by construction.
const isOptionDataComponent = isDesignerOptionComponent
const getOptionDataProperty = getDesignerCollectionProperty
const isTabularDataComponent = isDesignerTabularComponent
/**
 * The inspector's Data tab follows the toolbox category, not the collection
 * registry: everything filed under `data` is expected to be data driven, even
 * when it carries no collection property of its own.
 */
const isDataCategoryComponent = (definition?: DesignerComponentDefinition) =>
  definition?.toolboxGroup === 'data'

type TranslateFn = (key: string, params?: Record<string, string | number>) => string

const getPropertyExampleValues = (translate: TranslateFn): Record<string, unknown> => ({
  children: translate('::App.ComponentDesignerExample.ExampleContent'),
  className: 'p-4 rounded-lg shadow-sm',
  id: 'component-id',
  label: translate('::App.ComponentDesignerExample.ExampleTitle'),
  name: 'exampleName',
  placeholder: translate('::App.ComponentDesignerExample.ExamplePlaceholder'),
  src: '/img/example.png',
  title: translate('::App.ComponentDesignerExample.ExampleTitle'),
  url: '/api/app/example',
})

const getPropertyExampleValue = (
  property: DesignerPropertyInfo,
  currentValue: unknown,
  translate: TranslateFn,
): unknown => {
  const hasCurrentValue =
    currentValue !== undefined &&
    currentValue !== null &&
    currentValue !== '' &&
    (!Array.isArray(currentValue) || currentValue.length > 0) &&
    (typeof currentValue !== 'object' ||
      Array.isArray(currentValue) ||
      Object.keys(currentValue as Record<string, unknown>).length > 0)
  if (hasCurrentValue || typeof currentValue === 'boolean' || typeof currentValue === 'number') {
    return currentValue
  }
  if (property.options?.length) return property.options[0]
  const exampleValues = getPropertyExampleValues(translate)
  if (exampleValues[property.name] !== undefined) {
    return exampleValues[property.name]
  }
  if (property.name.toLowerCase().includes('color')) return '#0ea5e9'
  if (property.type === 'boolean') return true
  if (property.type === 'number') return 16
  if (property.type === 'array') {
    return [
      { label: translate('::App.Platform.Example'), value: 'example' },
    ]
  }
  if (property.type === 'object') {
    return property.name === 'style' ? { padding: 16, borderRadius: 8 } : { key: 'value' }
  }
  return translate('::App.ComponentDesignerExample.ExampleValue')
}

const getPropertySnippet = (
  property: DesignerPropertyInfo,
  currentValue: unknown,
  translate: TranslateFn,
) => {
  const exampleValue = getPropertyExampleValue(property, currentValue, translate)
  return typeof exampleValue === 'string'
    ? `${property.name}=${JSON.stringify(exampleValue)}`
    : `${property.name}={${JSON.stringify(exampleValue)}}`
}

const getDataValueType = (value: unknown) => {
  if (value === null) return 'null'
  if (Array.isArray(value)) return 'array'
  return typeof value
}

const getDataPreview = (value: unknown) => {
  const text =
    typeof value === 'string' ? value : (JSON.stringify(value) ?? String(value ?? 'undefined'))
  return text.length > 48 ? `${text.slice(0, 45)}…` : text
}

const discoverDataFields = (sample: unknown): DataField[] => {
  const fields: DataField[] = []
  const root = Array.isArray(sample) ? sample[0] : sample

  const visit = (value: unknown, path: string, depth: number) => {
    if (!path || fields.length >= 100) {
      if (!path && value && typeof value === 'object' && !Array.isArray(value)) {
        Object.entries(value as Record<string, unknown>).forEach(([key, child]) =>
          visit(child, key, depth),
        )
      }
      return
    }

    const valueType = getDataValueType(value)
    if (valueType === 'object' && depth < 4) {
      Object.entries(value as Record<string, unknown>).forEach(([key, child]) =>
        visit(child, `${path}.${key}`, depth + 1),
      )
      return
    }

    fields.push({ path, type: valueType, preview: getDataPreview(value) })
    if (Array.isArray(value) && value[0] && typeof value[0] === 'object' && depth < 4) {
      Object.entries(value[0] as Record<string, unknown>).forEach(([key, child]) =>
        visit(child, `${path}.${key}`, depth + 1),
      )
    }
  }

  visit(root, '', 0)
  return fields
}

const findDesignerAncestors = (
  nodes: DesignerNode[],
  id: string | null,
  ancestors: DesignerNode[] = [],
): DesignerNode[] | null => {
  if (!id) return null
  for (const node of nodes) {
    if (node.id === id) return ancestors
    const found = findDesignerAncestors(node.children, id, [...ancestors, node])
    if (found) return found
  }
  return null
}

const getSaveErrorMessage = (error: unknown, translate: TranslateFn) => {
  if (!axios.isAxiosError(error)) {
    return error instanceof Error
      ? error.message
      : translate('::App.DeveloperKitComponentDesigner.SaveFailed')
  }

  const responseData = error.response?.data as
    { error?: { message?: string; details?: string }; message?: string } | undefined

  return (
    responseData?.error?.details ||
    responseData?.error?.message ||
    responseData?.message ||
    error.message ||
    translate('::App.DeveloperKitComponentDesigner.SaveFailed')
  )
}

const isRunnableDataSourceUrl = (url: string) => {
  const normalizedUrl = url.trim().replace(/\/+$/, '')
  return normalizedUrl.startsWith('/api/') && normalizedUrl !== '/api/app'
}

const TOOLBOX_GROUP_LABELS: Record<DesignerComponentDefinition['toolboxGroup'], string> = {
  layout: 'Layouts',
  html: 'HTML Elements',
  platform: 'Platform Views',
  data: 'Data',
  ui: 'Sozsoft UI',
  custom: 'My Components',
}

const TOOLBOX_GROUP_ORDER: DesignerComponentDefinition['toolboxGroup'][] = [
  'layout',
  'html',
  'platform',
  'data',
  'ui',
  'custom',
]

const CANVAS_WIDTHS: Record<DesignerDocument['canvas']['width'], string> = {
  responsive: '100%',
  desktop: '1180px',
  tablet: '768px',
  mobile: '390px',
}

const clone = <T,>(value: T): T => JSON.parse(JSON.stringify(value))
const normalizeTableDimension = (value: unknown, fallback: number) =>
  Math.min(20, Math.max(1, Math.floor(Number(value) || fallback)))

const updateNodeTree = (
  nodes: DesignerNode[],
  id: string,
  updater: (node: DesignerNode) => DesignerNode,
): DesignerNode[] =>
  nodes.map((node) => {
    if (node.id === id) return updater(node)
    return { ...node, children: updateNodeTree(node.children, id, updater) }
  })

const removeNodeTree = (nodes: DesignerNode[], id: string): DesignerNode[] =>
  nodes
    .filter((node) => node.id !== id)
    .map((node) => ({
      ...node,
      children: removeNodeTree(node.children, id),
    }))

const removeDataSourceBindings = (nodes: DesignerNode[], sourceId: string): DesignerNode[] =>
  nodes.map((node) => ({
    ...node,
    bindings: Object.fromEntries(
      Object.entries(node.bindings || {}).filter(([, binding]) => binding.sourceId !== sourceId),
    ),
    children: removeDataSourceBindings(node.children, sourceId),
  }))

const insertNodeTree = (
  nodes: DesignerNode[],
  nodeToInsert: DesignerNode,
  parentId: string | null,
): DesignerNode[] => {
  if (!parentId) return [...nodes, nodeToInsert]
  return updateNodeTree(nodes, parentId, (node) => ({
    ...node,
    children: [...node.children, nodeToInsert],
  }))
}

const duplicateInTree = (nodes: DesignerNode[], id: string): DesignerNode[] => {
  const result: DesignerNode[] = []
  nodes.forEach((node) => {
    result.push({ ...node, children: duplicateInTree(node.children, id) })
    if (node.id === id) {
      const copy = clone(node)
      const renewIds = (item: DesignerNode) => {
        item.id = createDesignerId()
        item.children.forEach(renewIds)
      }
      renewIds(copy)
      result.push(copy)
    }
  })
  return result
}

const insertRelativeToNode = (
  nodes: DesignerNode[],
  targetId: string,
  nodeToInsert: DesignerNode,
  placement: 'before' | 'after',
): DesignerNode[] => {
  const targetIndex = nodes.findIndex((node) => node.id === targetId)
  if (targetIndex >= 0) {
    const next = [...nodes]
    next.splice(targetIndex + (placement === 'after' ? 1 : 0), 0, nodeToInsert)
    return next
  }
  return nodes.map((node) => ({
    ...node,
    children: insertRelativeToNode(node.children, targetId, nodeToInsert, placement),
  }))
}

/**
 * Moves a node one step up/down. Swapping with a sibling only works while the
 * node has one, so a node that sits alone in a container (or at the edge of one)
 * is lifted out and placed next to its parent instead — otherwise the arrows
 * would silently do nothing, which is how they used to behave.
 */
const moveInTree = (nodes: DesignerNode[], id: string, direction: -1 | 1): DesignerNode[] => {
  const ancestors = findDesignerAncestors(nodes, id)
  if (!ancestors) return nodes

  const parent = ancestors[ancestors.length - 1]
  const siblings = parent ? parent.children : nodes
  const index = siblings.findIndex((node) => node.id === id)
  if (index < 0) return nodes

  // Tabs children live in separate tabs, so only components sharing a tab are
  // neighbours — otherwise the arrows would swap with something not on screen.
  const group =
    parent?.type === 'Tabs'
      ? siblings.filter((node) => (node.slot || '') === (siblings[index].slot || ''))
      : siblings
  const groupIndex = group.findIndex((node) => node.id === id)
  const targetNode = group[groupIndex + direction]

  if (targetNode) {
    const target = siblings.findIndex((node) => node.id === targetNode.id)
    const next = [...siblings]
    ;[next[index], next[target]] = [next[target], next[index]]
    // In a Table the visible cell comes from `slot`, not from array order, so the
    // slots have to stay with the position for the swap to be visible.
    if (parent?.type === 'Table') {
      next[index] = { ...next[index], slot: siblings[index].slot }
      next[target] = { ...next[target], slot: siblings[target].slot }
    }
    return parent ? updateNodeTree(nodes, parent.id, (node) => ({ ...node, children: next })) : next
  }

  // Already first/last: at the root there is nowhere left to go.
  if (!parent) return nodes

  const movingNode = { ...siblings[index], slot: undefined }
  const withoutNode = updateNodeTree(nodes, parent.id, (node) => ({
    ...node,
    children: node.children.filter((child) => child.id !== id),
  }))
  return insertRelativeToNode(
    withoutNode,
    parent.id,
    movingNode,
    direction === -1 ? 'before' : 'after',
  )
}

/**
 * Table cells are addressed by `slot`, and children without one fall back to
 * their positional index. Materialising the effective slots keeps every existing
 * cell in place while a node is added to or removed from the table.
 */
const withResolvedTableSlots = (table: DesignerNode): DesignerNode => {
  const columnCount = normalizeTableDimension(table.props.columnCount, 3)
  return {
    ...table,
    children: table.children.map((child, childIndex) => ({
      ...child,
      slot:
        child.slot || `table:${Math.floor(childIndex / columnCount)}:${childIndex % columnCount}`,
    })),
  }
}

const resolveAllTableSlots = (nodes: DesignerNode[]): DesignerNode[] =>
  nodes.map((node) => {
    const resolved = { ...node, children: resolveAllTableSlots(node.children) }
    return resolved.type === 'Table' ? withResolvedTableSlots(resolved) : resolved
  })

/**
 * Moves an existing node into a container (or to the root when `parentId` is
 * null). Used by drag & drop so a component can leave a Table cell and be put
 * back into one.
 */
const moveNodeIntoContainer = (
  nodes: DesignerNode[],
  nodeId: string,
  parentId: string | null,
  slot?: string,
): DesignerNode[] => {
  const source = findDesignerNode(nodes, nodeId)
  if (!source || parentId === nodeId) return nodes
  // Dropping a node inside its own subtree would detach that subtree.
  if (parentId && findDesignerNode(source.children, parentId)) return nodes

  // Pin every table cell before the tree changes, so removing the node does not
  // shift the siblings that still rely on their positional fallback.
  const pinned = resolveAllTableSlots(nodes)
  const movingNode = { ...(findDesignerNode(pinned, nodeId) || source), slot }
  const remaining = removeNodeTree(pinned, nodeId)
  if (!parentId) return [...remaining, movingNode]

  return updateNodeTree(remaining, parentId, (parent) => ({
    ...parent,
    children: [...parent.children, movingNode],
  }))
}

const reorderNodeTree = (
  nodes: DesignerNode[],
  sourceId: string,
  targetId: string,
  placement: 'before' | 'after',
): DesignerNode[] => {
  const source = findDesignerNode(nodes, sourceId)
  const target = findDesignerNode(nodes, targetId)
  if (!source || !target || sourceId === targetId || findDesignerNode(source.children, targetId)) {
    return nodes
  }
  const movingNode = { ...source, slot: target.slot }
  return insertRelativeToNode(removeNodeTree(nodes, sourceId), targetId, movingNode, placement)
}

const definitionToNode = (definition: DesignerComponentDefinition): DesignerNode => {
  const props: Record<string, unknown> = {}
  const events: Record<string, string> = {}
  definition.properties.forEach((property) => {
    if (property.category === 'events' || property.type === 'function') {
      events[property.name] = typeof property.value === 'string' ? property.value : ''
    } else {
      props[property.name] = clone(property.value)
    }
  })
  return {
    id: createDesignerId(),
    type: definition.name,
    kind: definition.kind,
    props,
    events,
    bindings: {},
    children: [],
  }
}

const normalizeDesignerDocument = (document: DesignerDocument): DesignerDocument => {
  const normalizeNodes = (nodes: DesignerNode[]): DesignerNode[] =>
    nodes.map((node) => {
      const props = { ...(node.props || {}) }
      const events = { ...(node.events || {}) }
      const bindings = { ...(node.bindings || {}) }
      if (node.type === 'Select') {
        const legacyPropAliases: Record<string, string> = {
          clearable: 'isClearable',
          disabled: 'isDisabled',
          multiple: 'isMulti',
          searchable: 'isSearchable',
        }
        Object.entries(legacyPropAliases).forEach(([legacyName, runtimeName]) => {
          if (props[runtimeName] === undefined && props[legacyName] !== undefined) {
            props[runtimeName] = props[legacyName]
          }
          delete props[legacyName]
        })
        if (events.onInputChange === undefined && events.onSearch !== undefined) {
          events.onInputChange = events.onSearch
        }
        delete events.onSearch
      }
      if (node.type === 'Menu') {
        if (!Array.isArray(props.items) && Array.isArray(props.options)) {
          props.items = props.options
        }
        if (!bindings.items && bindings.options) bindings.items = bindings.options
        delete props.options
        delete props.variant
        delete bindings.options
      }
      if (node.type === 'Table') {
        const legacyRows = Array.isArray(props.items)
          ? props.items
          : Array.isArray(props.data)
            ? props.data
            : []
        const firstLegacyRow = legacyRows.find(
          (item) => item && typeof item === 'object' && !Array.isArray(item),
        ) as Record<string, unknown> | undefined
        const legacyColumns = Array.isArray(props.dataColumns)
          ? props.dataColumns
          : Array.isArray(props.columns)
            ? props.columns
            : firstLegacyRow
              ? Object.keys(firstLegacyRow)
              : []
        props.rowCount = normalizeTableDimension(props.rowCount, legacyRows.length || 2)
        props.columnCount = normalizeTableDimension(props.columnCount, legacyColumns.length || 3)
        delete props.data
        delete props.columns
        delete props.items
        delete props.dataColumns
        delete bindings.data
        delete bindings.items
      }
      let children = normalizeNodes(node.children || [])
      if (node.type === 'Table') {
        const columnCount = normalizeTableDimension(props.columnCount, 3)
        children = children.map((child, index) => ({
          ...child,
          slot: child.slot || `table:${Math.floor(index / columnCount)}:${index % columnCount}`,
        }))
      }
      return {
        ...node,
        props,
        events,
        bindings,
        children,
      }
    })
  return {
    ...document,
    // Documents saved before refs existed get theirs here, so every component is
    // addressable from a script the moment it is opened.
    nodes: withDesignerRefs(normalizeNodes(document.nodes)),
    canvas: { width: document.canvas?.width || 'responsive' },
    // Documents saved before non-GET sources existed have no usable method value.
    dataSources: (Array.isArray(document.dataSources) ? document.dataSources : []).map(
      (source) => ({ ...source, method: toDesignerHttpMethod(source.method) }),
    ),
  }
}

const parseDesignerDocument = (rawProps: string | undefined): DesignerDocument | null => {
  if (!rawProps) return null
  try {
    const parsed = JSON.parse(rawProps)
    const document = parsed?.visualDesigner
    if (document?.version === 1 && Array.isArray(document.nodes)) {
      return normalizeDesignerDocument(document)
    }
  } catch {
    return null
  }
  return null
}

const parseDesignerDocumentFromCode = (code: string | undefined): DesignerDocument | null => {
  const encodedDocument = code?.match(/\/\*__SOZSOFT_VISUAL_DESIGNER__(.*?)__\*\//)?.[1]
  if (!encodedDocument) return null
  try {
    const document = JSON.parse(decodeURIComponent(encodedDocument)) as DesignerDocument
    return document?.version === 1 && Array.isArray(document.nodes)
      ? normalizeDesignerDocument(document)
      : null
  } catch {
    return null
  }
}

const parseComponentDefaultProps = (code: string): Record<string, unknown> => {
  const defaults: Record<string, unknown> = {}
  const parameters = code.match(
    /(?:const\s+[A-Za-z_$][\w$]*\s*(?::[^=]+)?=\s*|function\s+[A-Za-z_$][\w$]*\s*)\(\s*\{([\s\S]*?)\}\s*\)/,
  )?.[1]
  if (!parameters) return defaults

  for (const match of parameters.matchAll(
    /([A-Za-z_$][\w$]*)\s*=\s*("(?:\\.|[^"])*"|'(?:\\.|[^'])*'|true|false|null|-?\d+(?:\.\d+)?)/g,
  )) {
    const rawValue = match[2]
    try {
      defaults[match[1]] = rawValue.startsWith("'")
        ? rawValue.slice(1, -1).replace(/\\'/g, "'")
        : JSON.parse(rawValue)
    } catch {
      defaults[match[1]] = rawValue
    }
  }

  return defaults
}

const parseGeneratedJsxProps = (
  source: string,
  expressionValues: Record<string, unknown> = {},
): Record<string, unknown> => {
  const props: Record<string, unknown> = {}
  for (const match of source.matchAll(/([A-Za-z_$][\w$]*)="((?:\\.|[^"])*)"/g)) {
    try {
      props[match[1]] = JSON.parse(`"${match[2]}"`)
    } catch {
      props[match[1]] = match[2]
    }
  }
  for (const match of source.matchAll(
    /([A-Za-z_$][\w$]*)=\{(true|false|null|-?\d+(?:\.\d+)?)\}/g,
  )) {
    props[match[1]] =
      match[2] === 'true'
        ? true
        : match[2] === 'false'
          ? false
          : match[2] === 'null'
            ? null
            : Number(match[2])
  }
  for (const match of source.matchAll(/([A-Za-z_$][\w$]*)=\{([A-Za-z_$][\w$]*)\}/g)) {
    if (Object.prototype.hasOwnProperty.call(expressionValues, match[2])) {
      props[match[1]] = expressionValues[match[2]]
    }
  }
  return props
}

const migrateGeneratedCodeToDesignerDocument = (
  code: string | undefined,
  definitions: Map<string, DesignerComponentDefinition>,
): DesignerDocument | null => {
  if (!code || !code.includes('export default')) return null

  const document = createEmptyDesignerDocument('visual')
  const componentDefaultProps = parseComponentDefaultProps(code)
  const positionedNodes: Array<{ index: number; node: DesignerNode }> = []
  const addNode = (
    index: number,
    type: string,
    kind: DesignerNode['kind'],
    props: Record<string, unknown> = {},
    bindings: DesignerNode['bindings'] = {},
    id = createDesignerId(),
  ) =>
    positionedNodes.push({
      index,
      node: { id, type, kind, props, bindings, events: {}, children: [] },
    })

  for (const stateMatch of code.matchAll(
    /const \[data_([A-Za-z0-9_$]+), setData_\1\] = React\.useState\(null\)([\s\S]*?)(?=\n\s*const \[data_|\n\s*const [A-Za-z_$][\w$]* = \(\{|$)/g,
  )) {
    const sourceId = stateMatch[1]
    const block = stateMatch[2]
    const urlMatch = block.match(/fetchData\(\{\s*url:\s*("(?:\\.|[^"])*")/)
    if (!urlMatch) continue
    const responsePathMatch = block.match(
      new RegExp(`setData_${sourceId}\\(getByPath\\(response\\.data,\\s*("(?:\\\\.|[^"])*")`),
    )
    document.dataSources.push({
      id: sourceId,
      name: sourceId.replace(/^source_/, '').replace(/_/g, ' '),
      method: 'GET',
      url: JSON.parse(urlMatch[1]),
      responsePath: responsePathMatch ? JSON.parse(responsePathMatch[1]) : '',
    })
  }

  for (const match of code.matchAll(
    /<UiKit\.(Select|AutoComplete|Menu|Pagination)\b([^>]*?)(?:\/>|>)/g,
  )) {
    const type = match[1]
    const attributes = match[2]
    const props = parseGeneratedJsxProps(attributes, componentDefaultProps)
    const bindings: DesignerNode['bindings'] = {}
    if (type === 'Select' || type === 'AutoComplete' || type === 'Menu') {
      const optionsMatch = attributes.match(
        /options=\{toSelectOptions\(getByPath\(data_([A-Za-z0-9_$]+),\s*("(?:\\.|[^"])*")\),\s*("(?:\\.|[^"])*"),\s*("(?:\\.|[^"])*")\)\}/,
      )
      if (optionsMatch) {
        bindings.options = {
          sourceId: optionsMatch[1],
          path: JSON.parse(optionsMatch[2]),
          labelPath: JSON.parse(optionsMatch[3]),
          valuePath: JSON.parse(optionsMatch[4]),
        }
      }
    }
    addNode(match.index, type, 'ui', props, bindings)
  }

  for (const match of code.matchAll(
    /const tableItems_([A-Za-z0-9_$]+)\s*=\s*(\[[^\n]*\])[\s\S]*?const tableColumns_\1\s*=\s*(\[[^\n]*\])[\s\S]*?<UiKit\.Table\b([^>]*)>/g,
  )) {
    try {
      const legacyItems = JSON.parse(match[2]) as unknown[]
      const legacyColumns = JSON.parse(match[3]) as unknown[]
      addNode(
        match.index,
        'Table',
        'ui',
        {
          ...parseGeneratedJsxProps(match[4], componentDefaultProps),
          rowCount: normalizeTableDimension(legacyItems.length, 2),
          columnCount: normalizeTableDimension(legacyColumns.length, 3),
        },
        {},
        match[1],
      )
    } catch {
      // Ignore a table block that is not in the generated designer format.
    }
  }

  for (const match of code.matchAll(
    /const gridItems_([A-Za-z0-9_$]+)\s*=\s*([^\n]+)[\s\S]*?const gridColumns_\1\s*=\s*(\[[^\n]*\])/g,
  )) {
    const bindingMatch = match[2].match(/getByPath\(data_([A-Za-z0-9_$]+),\s*("(?:\\.|[^"])*")\)/)
    const bindings: DesignerNode['bindings'] = {}
    if (bindingMatch) {
      bindings.items = { sourceId: bindingMatch[1], path: JSON.parse(bindingMatch[2]) }
    }
    try {
      addNode(
        match.index,
        'Grid',
        'ui',
        {
          className:
            code
              .slice(Math.max(0, match.index - 250), match.index)
              .match(/<div className="([^"]*)"[^>]*>\s*\{\(\(\) => \{$/)?.[1] || '',
          dataColumns: JSON.parse(match[3]),
          compact: !code.slice(match.index, match.index + 5000).includes('px-3 py-2'),
          hoverable: code.slice(match.index, match.index + 5000).includes('hover:bg-'),
          overflow: code.slice(match.index, match.index + 5000).includes('overflow-auto'),
          borderlessRow: !code.slice(match.index, match.index + 5000).includes('border-b'),
        },
        bindings,
        match[1],
      )
    } catch {
      // Ignore a grid block that is not in the generated designer format.
    }
  }

  for (const match of code.matchAll(/<PlatformViewHost\b([^>]*?)\/>/g)) {
    const props = parseGeneratedJsxProps(match[1], componentDefaultProps)
    const view = String(props.view || '')
    const platformTypes: Record<string, string> = {
      List: 'ListView',
      Edit: 'EditView',
      Gantt: 'GanttView',
      TodoBoard: 'TodoBoard',
      CardView: 'CardView',
      SchedulerView: 'SchedulerView',
      Pivot: 'PivotView',
      Chart: 'ChartView',
    }
    addNode(match.index, platformTypes[view] || view || 'ListView', 'platform', props)
  }

  for (const match of code.matchAll(/<img\b([^>]*?)\/>/g)) {
    addNode(match.index, 'img', 'html', parseGeneratedJsxProps(match[1], componentDefaultProps))
  }

  const ignoredCustomTags = new Set(['UiKit', 'PlatformViewHost', 'React', 'Fragment'])
  for (const match of code.matchAll(/<([A-Z][A-Za-z0-9_$]*)\b([^>]*?)\/>/g)) {
    if (ignoredCustomTags.has(match[1]) || match[1].startsWith('UiKit')) continue
    const definition = definitions.get(match[1])
    addNode(
      match.index,
      match[1],
      definition?.kind || 'custom',
      parseGeneratedJsxProps(match[2], componentDefaultProps),
    )
  }

  document.nodes = positionedNodes
    .sort((left, right) => left.index - right.index)
    .map(({ node }) => node)
  return document.nodes.length ? document : null
}

/**
 * Array-of-object properties otherwise fall back to a raw JSON textarea, which is
 * unusable for anything but trivial values. Components listed here get a proper
 * row editor instead, keyed by `<component>.<property>`.
 */
const OBJECT_LIST_PROPERTIES: Record<
  string,
  { itemLabel: string; fields: Array<{ name: string; label: string; placeholder?: string }> }
> = {
  'ImageViewer.images': {
    itemLabel: 'App.ComponentDesignerImageList.ImageListItem',
    fields: [
      {
        name: 'src',
        label: 'App.ComponentDesignerImageList.Src',
        placeholder: 'https://…',
      },
      {
        name: 'thumbnail',
        label: 'App.ComponentDesignerImageList.Thumbnail',
        placeholder: 'App.ComponentDesignerImageList.ThumbnailPlaceholder',
      },
      {
        name: 'alt',
        label: 'App.ComponentDesignerImageList.Alt',
        placeholder: 'App.ComponentDesignerImageList.AltPlaceholder',
      },
      {
        name: 'caption',
        label: 'App.Listform.ListformField.Description',
        placeholder: 'App.ComponentDesignerImageList.CaptionPlaceholder',
      },
    ],
  },
}

const ObjectListEditor = ({
  schema,
  value,
  onChange,
}: {
  schema: (typeof OBJECT_LIST_PROPERTIES)[string]
  value: unknown
  onChange: (value: unknown) => void
}) => {
  const { translate } = useLocalization()
  const items = Array.isArray(value) ? (value as Array<Record<string, unknown>>) : []
  const inputClass =
    'w-full rounded border border-slate-300 bg-white px-2 py-1.5 text-[10px] text-slate-800 outline-none focus:border-sky-500 dark:border-slate-700 dark:bg-slate-900 dark:text-slate-100'

  const replaceItem = (index: number, next: Record<string, unknown>) =>
    onChange(items.map((item, itemIndex) => (itemIndex === index ? next : item)))

  const move = (index: number, direction: -1 | 1) => {
    const target = index + direction
    if (target < 0 || target >= items.length) return
    const next = [...items]
    ;[next[index], next[target]] = [next[target], next[index]]
    onChange(next)
  }

  return (
    <div className="space-y-2">
      {items.map((item, index) => (
        <div
          key={index}
          className="space-y-1.5 rounded-md border border-slate-200 p-2 dark:border-slate-700"
        >
          <div className="flex items-center justify-between">
            <span className="text-[10px] font-semibold text-slate-500">
              {translate('::' + schema.itemLabel)} {index + 1}
            </span>
            <div className="flex items-center gap-0.5">
              <button
                className="rounded px-1 text-slate-400 hover:text-sky-600 disabled:opacity-30"
                disabled={index === 0}
                title={translate('::App.Platform.MoveUp')}
                type="button"
                onClick={() => move(index, -1)}
              >
                <FaArrowUp className="h-2.5 w-2.5" />
              </button>
              <button
                className="rounded px-1 text-slate-400 hover:text-sky-600 disabled:opacity-30"
                disabled={index === items.length - 1}
                title={translate('::App.Platform.MoveDown')}
                type="button"
                onClick={() => move(index, 1)}
              >
                <FaArrowDown className="h-2.5 w-2.5" />
              </button>
              <button
                className="rounded px-1 text-slate-400 hover:text-red-600"
                title={translate('::App.Platform.Delete')}
                type="button"
                onClick={() => onChange(items.filter((_, i) => i !== index))}
              >
                <FaTrash className="h-2.5 w-2.5" />
              </button>
            </div>
          </div>
          {item.src ? (
            <img
              alt=""
              className="h-16 w-full rounded border border-slate-200 object-cover dark:border-slate-700"
              src={String(item.thumbnail || item.src)}
            />
          ) : null}
          {schema.fields.map((field) => (
            <label key={field.name} className="block">
              <span className="mb-0.5 block text-[9px] font-medium uppercase tracking-wide text-slate-400">
                {translate('::' + field.label)}
              </span>
              <input
                className={inputClass}
                placeholder={
                  field.placeholder?.startsWith('App.')
                    ? translate('::' + field.placeholder)
                    : field.placeholder
                }
                type="text"
                value={String(item[field.name] ?? '')}
                onChange={(event) =>
                  replaceItem(index, { ...item, [field.name]: event.target.value })
                }
              />
            </label>
          ))}
        </div>
      ))}
      <button
        className="flex w-full items-center justify-center gap-1 rounded border border-dashed border-slate-300 px-2 py-1.5 text-[10px] font-semibold text-sky-600 hover:border-sky-400 dark:border-slate-700"
        type="button"
        onClick={() => onChange([...items, { src: '' }])}
      >
        <FaPlus /> {schema.itemLabel} ekle
      </button>
    </div>
  )
}

const PropertyEditor = ({
  componentType,
  name,
  type,
  value,
  options,
  onChange,
}: {
  componentType?: string
  name: string
  type: string
  value: unknown
  options?: string[]
  onChange: (value: unknown) => void
}) => {
  const { translate } = useLocalization()
  const [styleModalOpen, setStyleModalOpen] = useState(false)
  const inputClass =
    'w-full rounded-md border border-slate-300 bg-white px-2.5 py-2 text-xs text-slate-800 outline-none transition focus:border-sky-500 focus:ring-2 focus:ring-sky-100 dark:border-slate-700 dark:bg-slate-900 dark:text-slate-100'

  if (type === 'boolean') {
    return (
      <label className="flex cursor-pointer items-center justify-between rounded-md border border-slate-200 px-2.5 py-2 dark:border-slate-700">
        <span className="text-xs text-slate-600 dark:text-slate-300">
          {value ? 'Enabled' : 'Disabled'}
        </span>
        <input
          checked={Boolean(value)}
          className="h-4 w-4 accent-sky-600"
          type="checkbox"
          onChange={(event) => onChange(event.target.checked)}
        />
      </label>
    )
  }
  if (type === 'select' && options) {
    const currentValue = String(value ?? '')
    return (
      <select
        className={inputClass}
        value={currentValue}
        onChange={(event) => onChange(event.target.value)}
      >
        {/* An empty value is not emitted, so the component keeps its own or its
            container's default — spell that out instead of showing a blank row. */}
        {!options.includes(currentValue) && (
          <option value="">{translate('::Abp.Mailing.Default')}</option>
        )}
        {options.map((option) => (
          <option key={option} value={option}>
            {option}
          </option>
        ))}
      </select>
    )
  }
  const objectListSchema = OBJECT_LIST_PROPERTIES[`${componentType}.${name}`]
  if (objectListSchema) {
    return <ObjectListEditor schema={objectListSchema} value={value} onChange={onChange} />
  }
  if (type === 'object' || type === 'array') {
    return (
      <textarea
        className={`${inputClass} min-h-20 font-mono`}
        value={typeof value === 'string' ? value : JSON.stringify(value, null, 2)}
        onChange={(event) => {
          try {
            onChange(JSON.parse(event.target.value))
          } catch {
            onChange(event.target.value)
          }
        }}
      />
    )
  }
  const normalizedPropertyName = name.toLowerCase()
  const isCssProperty = type === 'string' && normalizedPropertyName.includes('css')
  const isClassProperty =
    type === 'string' &&
    (normalizedPropertyName === 'class' ||
      normalizedPropertyName.endsWith('class') ||
      normalizedPropertyName.endsWith('classname'))
  if (isClassProperty || isCssProperty) {
    const currentClasses = String(value ?? '')
    return (
      <>
        <div className="flex gap-2">
          {isCssProperty ? (
            <textarea
              className={`${inputClass} min-h-20 font-mono`}
              placeholder={translate('::App.DeveloperKitComponentDesigner.CssPlaceholder')}
              value={currentClasses}
              onChange={(event) => onChange(event.target.value)}
            />
          ) : (
            <input
              className={`${inputClass} font-mono`}
              placeholder={translate('::App.DeveloperKitComponentDesigner.ClassPlaceholder')}
              type="text"
              value={currentClasses}
              onChange={(event) => onChange(event.target.value)}
            />
          )}
          <Button
            icon={<FaBolt />}
            size="sm"
            title={translate('::App.DeveloperKitComponentDesigner.EditWithStyleModal', { name })}
            variant="default"
            onClick={() => setStyleModalOpen(true)}
          />
        </div>
        <StyleModal
          isOpen={styleModalOpen}
          mode={isCssProperty ? 'css' : 'class'}
          propertyName={name}
          value={currentClasses}
          onChange={onChange}
          onClose={() => setStyleModalOpen(false)}
        />
      </>
    )
  }
  const multiline = name === 'children' || name === 'html' || String(value ?? '').length > 80
  if (multiline) {
    return (
      <textarea
        className={`${inputClass} min-h-20`}
        value={String(value ?? '')}
        onChange={(event) => onChange(event.target.value)}
      />
    )
  }
  return (
    <input
      className={inputClass}
      placeholder={type === 'string' ? 'Metin veya ::LanguageKey' : undefined}
      type={type === 'number' ? 'number' : name.toLowerCase().includes('color') ? 'color' : 'text'}
      value={String(value ?? '')}
      onChange={(event) =>
        onChange(type === 'number' ? Number(event.target.value) : event.target.value)
      }
    />
  )
}

const VisualComponentDesigner = () => {
  const { id } = useParams()
  const { translate } = useLocalization()
  const { components, updateComponent, renderComponent } = useComponents()
  const [componentDetails, setComponentDetails] = useState<CustomComponent | null>(null)
  const [componentLoadError, setComponentLoadError] = useState('')
  const [loadedId, setLoadedId] = useState<string | null>(null)
  const [document, setDocument] = useState<DesignerDocument>(() => createEmptyDesignerDocument())
  const [manualCode, setManualCode] = useState('')
  const [selectedId, setSelectedId] = useState<string | null>(null)
  const [workspaceTab, setWorkspaceTab] = useState<WorkspaceTab>('design')
  const [inspectorTab, setInspectorTab] = useState<InspectorTab>('properties')
  // Editing buffer of the selected component's ref; committed on blur/Enter so a
  // half typed name never lands in the document.
  const [refDraft, setRefDraft] = useState('')
  const [refError, setRefError] = useState('')
  const [scriptApiOpen, setScriptApiOpen] = useState(false)
  const [scriptApiSearch, setScriptApiSearch] = useState('')
  /** Last focused event editor, so a Script API example lands in the right one. */
  const [focusedEventName, setFocusedEventName] = useState('')
  const [search, setSearch] = useState('')
  const [expandedToolboxGroups, setExpandedToolboxGroups] = useState<
    Record<DesignerComponentDefinition['toolboxGroup'], boolean>
  >({ layout: true, html: true, platform: true, data: true, ui: true, custom: true })
  const [isSaving, setIsSaving] = useState(false)
  const [savedCode, setSavedCode] = useState('')
  const [savedDesignerFingerprint, setSavedDesignerFingerprint] = useState('')
  const [dataTestResults, setDataTestResults] = useState<Record<string, DataTestResult>>({})
  const [dataSourceSamples, setDataSourceSamples] = useState<Record<string, unknown>>({})
  const [dataPanelSourceId, setDataPanelSourceId] = useState('')
  const [selectDataModes, setSelectDataModes] = useState<Record<string, 'static' | 'endpoint'>>({})
  const [staticCollectionDrafts, setStaticCollectionDrafts] = useState<Record<string, string>>({})
  const [staticCollectionErrors, setStaticCollectionErrors] = useState<Record<string, string>>({})
  const [generatedEndpoints, setGeneratedEndpoints] = useState<CrudEndpoint[]>([])
  const [endpointCatalogLoading, setEndpointCatalogLoading] = useState(true)
  const [endpointCatalogError, setEndpointCatalogError] = useState('')
  const [catalogSourceEditor, setCatalogSourceEditor] = useState<{
    item: DataSourceCatalogItem | null
    draft: DesignerDataSource
  } | null>(null)
  const [catalogSourceTestResult, setCatalogSourceTestResult] = useState<DataTestResult | null>(
    null,
  )
  const [endpointResultModal, setEndpointResultModal] = useState<EndpointResultModal | null>(null)
  /** Toolbox'ta hangi komponentin sürüklendiğini işaretlemek için. */
  const activeDrag = useDesignerDrag()
  /** Kural tabanlı script builder'ın düzenlediği event. */
  const [scriptBuilderTarget, setScriptBuilderTarget] = useState<{
    nodeId: string
    eventName: string
  } | null>(null)
  const [isCatalogSourceSaving, setIsCatalogSourceSaving] = useState(false)
  const undoStack = useRef<DesignerDocument[]>([])
  const redoStack = useRef<DesignerDocument[]>([])

  const component = componentDetails?.id === id ? componentDetails : undefined
  const name = component?.name || 'VisualComponent'
  // The tab shows what is being edited: the human readable description when the
  // component carries one, the technical name otherwise.
  const pageTitle =
    component?.description?.trim() || component?.name || translate('::App.DeveloperKit.Components')
  const customNames = useMemo(
    () => components.filter((item) => item.id !== id && item.isActive).map((item) => item.name),
    [components, id],
  )
  const catalog = useMemo(() => getDesignerCatalog(customNames), [customNames])
  const catalogByName = useMemo(() => new Map(catalog.map((item) => [item.name, item])), [catalog])
  const selectDesignerNode = useCallback((nodeId: string | null) => {
    setSelectedId(nodeId || null)
    setInspectorTab('properties')
  }, [])

  useEffect(() => {
    let cancelled = false
    setEndpointCatalogLoading(true)
    setEndpointCatalogError('')

    developerKitService
      .getGeneratedListEndpoints()
      .then((result) => {
        if (!cancelled) setGeneratedEndpoints(result.items || [])
      })
      .catch((error) => {
        if (!cancelled) setEndpointCatalogError(getSaveErrorMessage(error, translate))
      })
      .finally(() => {
        if (!cancelled) setEndpointCatalogLoading(false)
      })

    return () => {
      cancelled = true
    }
  }, [])

  useEffect(() => {
    let cancelled = false
    setComponentDetails(null)
    setComponentLoadError('')
    setLoadedId(null)
    setSelectedId(null)

    if (!id) return () => undefined

    const loadComponentDetails = async () => {
      try {
        const currentComponent = await developerKitService.getCustomComponent(id)
        if (!cancelled) setComponentDetails(currentComponent)
      } catch (error) {
        if (cancelled) return
        setComponentLoadError(getSaveErrorMessage(error, translate))
      }
    }

    void loadComponentDetails()
    return () => {
      cancelled = true
    }
  }, [id])

  useEffect(() => {
    if (!id || !component || loadedId === id) return
    const propsDocument = parseDesignerDocument(component.props)
    const hasStoredDesignerNodes = Boolean(propsDocument?.nodes.length)
    const codeBackupDocument = hasStoredDesignerNodes
      ? null
      : parseDesignerDocumentFromCode(component.code)
    const migratedCodeDocument =
      hasStoredDesignerNodes || codeBackupDocument
        ? null
        : migrateGeneratedCodeToDesignerDocument(component.code, catalogByName)
    const visualDocument = hasStoredDesignerNodes
      ? propsDocument
      : codeBackupDocument || migratedCodeDocument || propsDocument
    const initialDocument = visualDocument || createEmptyDesignerDocument('code')
    setDocument(initialDocument)
    setDataTestResults({})
    setDataSourceSamples({})
    setManualCode(component.code || '')
    setSavedCode(component.code || '')
    setSavedDesignerFingerprint(JSON.stringify(initialDocument))
    setWorkspaceTab('design')
    setLoadedId(id)
    undoStack.current = []
    redoStack.current = []
  }, [catalogByName, component, id, loadedId])

  const generatedCode = useMemo(() => generateDesignerCode(name, document), [document, name])
  const effectiveCode = document.sourceMode === 'visual' ? generatedCode : manualCode
  const isDirty =
    effectiveCode.trim() !== savedCode.trim() ||
    JSON.stringify(document) !== savedDesignerFingerprint

  const commitDocument = useCallback((updater: (current: DesignerDocument) => DesignerDocument) => {
    setDocument((current) => {
      undoStack.current.push(clone(current))
      if (undoStack.current.length > 80) undoStack.current.shift()
      redoStack.current = []
      const next = updater(current)
      // Single choke point for ref assignment: whichever way a node reaches the
      // document — toolbox drop, duplicate, drag or paste — it leaves here with a
      // unique handle that the event scripts can address.
      return { ...next, nodes: withDesignerRefs(next.nodes) }
    })
  }, [])

  const undo = useCallback(() => {
    const previous = undoStack.current.pop()
    if (!previous) return
    redoStack.current.push(clone(document))
    setDocument(previous)
  }, [document])

  const redo = useCallback(() => {
    const next = redoStack.current.pop()
    if (!next) return
    undoStack.current.push(clone(document))
    setDocument(next)
  }, [document])

  const addComponent = useCallback(
    (definitionName: string, parentId: string | null = null, slot?: string) => {
      const definition = catalogByName.get(definitionName)
      if (!definition) return
      const node = definitionToNode(definition)
      if (slot) node.slot = slot
      commitDocument((current) => ({
        ...current,
        sourceMode: 'visual',
        nodes: insertNodeTree(current.nodes, node, parentId),
      }))
      selectDesignerNode(node.id)
      setWorkspaceTab('design')
    },
    [catalogByName, commitDocument, selectDesignerNode],
  )

  /**
   * Toolbox drop next to an existing component rather than inside it — the only
   * way to place something beside a node that cannot host children.
   */
  const addComponentBeside = useCallback(
    (definitionName: string, targetId: string, placement: 'before' | 'after') => {
      const definition = catalogByName.get(definitionName)
      if (!definition) return
      const node = definitionToNode(definition)
      commitDocument((current) => {
        // Table cells and tab panes address their children by slot, so the new
        // node has to join the one it was dropped next to.
        const target = findDesignerNode(current.nodes, targetId)
        if (target?.slot) node.slot = target.slot
        return {
          ...current,
          sourceMode: 'visual',
          nodes: insertRelativeToNode(current.nodes, targetId, node, placement),
        }
      })
      selectDesignerNode(node.id)
      setWorkspaceTab('design')
    },
    [catalogByName, commitDocument, selectDesignerNode],
  )

  const selectedNode = useMemo(
    () => findDesignerNode(document.nodes, selectedId),
    [document.nodes, selectedId],
  )
  const selectedDefinition = selectedNode ? catalogByName.get(selectedNode.type) : undefined
  /** Every addressable component of the page, keyed by ref. */
  const documentRefs = useMemo(() => collectDesignerRefs(document.nodes), [document.nodes])

  useEffect(() => {
    setRefDraft(selectedNode?.ref || '')
    setRefError('')
  }, [selectedNode?.id, selectedNode?.ref])

  /**
   * Renames the selected component's handle and rewrites the scripts that use
   * it, so `refs.button1` does not silently stop resolving once the ref is given
   * a meaningful name.
   */
  const commitRefRename = () => {
    if (!selectedNode) return
    const previous = selectedNode.ref || ''
    const next = refDraft.trim()
    if (!next || next === previous) {
      setRefDraft(previous)
      setRefError('')
      return
    }
    if (!isValidDesignerRef(next)) {
      setRefError(translate('::App.DeveloperKitComponentDesigner.RefInvalid'))
      return
    }
    if (documentRefs.has(next)) {
      setRefError(translate('::App.DeveloperKitComponentDesigner.RefTaken'))
      return
    }
    setRefError('')
    commitDocument((current) => ({
      ...current,
      lifecycle: { onMount: renameDesignerRefInScript(current.lifecycle.onMount, previous, next) },
      nodes: renameDesignerRefInNodes(
        updateNodeTree(current.nodes, selectedNode.id, (node) => ({ ...node, ref: next })),
        previous,
        next,
      ),
    }))
  }

  const copyToClipboard = (text: string, message: string) => {
    void navigator.clipboard?.writeText(text)
    toast.push(
      <Notification type="success" duration={1800}>
        {message}
      </Notification>,
      { placement: 'bottom-end' },
    )
  }

  const copyRefName = (ref: string) =>
    copyToClipboard(
      `refs.${ref}`,
      translate('::App.DeveloperKitComponentDesigner.RefCopied', { ref: `refs.${ref}` }),
    )

  /**
   * Fills the `{{ref}}` / `{{sql}}` / `{{url}}` placeholders of a Script API
   * example with names that actually exist on this page, so a copied example
   * runs without being edited first.
   */
  const resolveRecipeCode = useCallback(
    (code: string) => {
      const entries = [...documentRefs.entries()]
      const sqlRef = entries.find(([, node]) => isSqlDataSourceNode(node.type))?.[0]
      const selectedRef =
        selectedNode && !isSqlDataSourceNode(selectedNode.type) ? selectedNode.ref : undefined
      const componentRef =
        selectedRef ||
        entries.find(([, node]) => !isSqlDataSourceNode(node.type) && node.kind === 'ui')?.[0] ||
        entries.find(([, node]) => !isSqlDataSourceNode(node.type))?.[0]
      const url = document.dataSources.find((source) => source.method === 'GET')?.url
      return code
        .replace(/\{\{ref\}\}/g, componentRef || 'button1')
        .replace(/\{\{sql\}\}/g, sqlRef || 'sqlDataSource1')
        .replace(/\{\{url\}\}/g, url || '/api/app/orders')
    },
    [document.dataSources, documentRefs, selectedNode],
  )

  const filteredScriptRecipes = useMemo(() => {
    const query = scriptApiSearch.trim().toLocaleLowerCase('tr')
    if (!query) return DESIGNER_SCRIPT_RECIPES
    return DESIGNER_SCRIPT_RECIPES.filter((recipe) =>
      `${translate('::' + recipe.group)} ${translate('::' + recipe.title)} ${translate(
        '::' + recipe.description,
      )} ${recipe.code}`
        .toLocaleLowerCase('tr')
        .includes(query),
    )
  }, [scriptApiSearch, translate])
  /**
   * Record of every SqlDataSource on the canvas, derived from the tested Select
   * endpoint. Children bind to it through the container's node id, so it is
   * merged into the canvas data values and into the binding inspector samples.
   */
  const sqlDataSourceRecords = useMemo(() => {
    const records: Record<string, unknown> = {}
    walkDesignerNodes(document.nodes, (node) => {
      if (isSqlDataSourceNode(node.type)) {
        records[node.id] = getSqlDataSourceRecord(node, dataSourceSamples)
      }
    })
    return records
  }, [dataSourceSamples, document.nodes])
  const previewDataValues = useMemo(
    () => ({ ...dataSourceSamples, ...sqlDataSourceRecords }),
    [dataSourceSamples, sqlDataSourceRecords],
  )
  const selectedAncestors = useMemo(
    () => findDesignerAncestors(document.nodes, selectedId) || [],
    [document.nodes, selectedId],
  )
  const selectedIsSqlDataSource = isSqlDataSourceNode(selectedNode?.type)
  /** Nearest SqlDataSource above the selection; its record is bindable. */
  const sqlScopeNode = useMemo(
    () => [...selectedAncestors].reverse().find((node) => isSqlDataSourceNode(node.type)),
    [selectedAncestors],
  )
  /**
   * The container's record presented as a data source, so the existing endpoint
   * dropdown, field discovery and binding editors work on it unchanged.
   */
  const sqlScopeSource = useMemo<DesignerDataSource | null>(
    () =>
      sqlScopeNode
        ? {
            id: sqlScopeNode.id,
            name: translate('::App.DeveloperKitComponentDesigner.SqlDataSourceRecord', {
              field: getSqlDataSourceKeyField(sqlScopeNode),
            }),
            method: 'GET',
            url: '',
            responsePath: '',
          }
        : null,
    [sqlScopeNode],
  )
  /**
   * Only a GET endpoint returns rows, so only GET can feed a property binding —
   * and only one that is directly callable: a `{id}` URL has no key to fill it
   * with outside a SqlDataSource, so it cannot back a Grid or a Select list.
   */
  const bindableDataSources = useMemo(
    () =>
      document.dataSources.filter(
        (source) => source.method === 'GET' && !hasSqlDataSourceUrlParams(source.url),
      ),
    [document.dataSources],
  )
  /** The Select slot additionally accepts GetById, whose key comes from the URL. */
  const selectSlotDataSources = useMemo(
    () => document.dataSources.filter((source) => source.method === 'GET'),
    [document.dataSources],
  )
  /**
   * A collection component keeps managing its own list endpoint even inside a
   * SqlDataSource — the option list of a Select and the record the form edits are
   * two different things. Everything else inside the container is a record field
   * and may only bind to the container's Select result.
   */
  const selectedIsCollectionComponent =
    isOptionDataComponent(selectedNode?.type) || isTabularDataComponent(selectedNode?.type)
  const sqlScopeLocked = Boolean(sqlScopeNode) && !selectedIsCollectionComponent
  const inspectorDataSources = useMemo(
    () => (sqlScopeLocked ? (sqlScopeSource ? [sqlScopeSource] : []) : bindableDataSources),
    [bindableDataSources, sqlScopeLocked, sqlScopeSource],
  )
  const selectedIsDataComponent = Boolean(
    selectedNode &&
    (isDataCategoryComponent(selectedDefinition) || selectedIsSqlDataSource || sqlScopeNode),
  )
  const selectedProperties = useMemo<DesignerPropertyInfo[]>(() => {
    if (!selectedNode) return []
    const definedProperties = selectedDefinition?.properties || []
    const definedNames = new Set(definedProperties.map((property) => property.name))
    const storedProperties = Object.entries(selectedNode.props)
      .filter(([propertyName]) => !definedNames.has(propertyName))
      .map(([propertyName, value]) => ({
        name: propertyName,
        type: (Array.isArray(value)
          ? 'array'
          : value !== null && typeof value === 'object'
            ? 'object'
            : typeof value === 'boolean'
              ? 'boolean'
              : typeof value === 'number'
                ? 'number'
                : 'string') as DesignerPropertyInfo['type'],
        value,
        category: 'properties' as const,
      }))
    const properties = [...definedProperties, ...storedProperties]
    if (!properties.some((property) => property.name === 'className')) {
      properties.push({
        name: 'className',
        type: 'string',
        value: '',
        category: 'styling',
      })
    }
    return properties
  }, [selectedDefinition, selectedNode])
  const selectedBindingSourceId = selectedNode
    ? Object.values(selectedNode.bindings || {}).find((binding) =>
        inspectorDataSources.some((source) => source.id === binding.sourceId),
      )?.sourceId
    : undefined

  useEffect(() => {
    setDataPanelSourceId((current) => {
      if (selectedBindingSourceId) return selectedBindingSourceId
      if (inspectorDataSources.some((source) => source.id === current)) return current
      // Must fall back within the selectable set: a default the picker does not
      // list leaves `activeDataSource` undefined while the dropdown still paints
      // its first option, so the panel looks configured when nothing is selected.
      return inspectorDataSources[0]?.id || ''
    })
  }, [inspectorDataSources, selectedBindingSourceId])

  const dataSourceCatalog = useMemo<DataSourceCatalogItem[]>(() => {
    const items = new Map<string, DataSourceCatalogItem>()

    const catalogComponents = componentDetails
      ? [componentDetails, ...components.filter((storedComponent) => storedComponent.id !== id)]
      : components

    catalogComponents.forEach((storedComponent) => {
      const storedDocument = parseDesignerDocument(storedComponent.props)
      storedDocument?.dataSources.forEach((source) => {
        const dataSourceKey = `${source.method}:${source.url.trim()}:${source.responsePath.trim()}`
        if (items.has(dataSourceKey)) return
        const attached = document.dataSources.some(
          (currentSource) =>
            currentSource.method === source.method &&
            currentSource.url.trim() === source.url.trim() &&
            currentSource.responsePath.trim() === source.responsePath.trim(),
        )
        items.set(dataSourceKey, {
          attached,
          key: `component:${storedComponent.id}:${source.id}`,
          origin: `${storedComponent.name} componenti`,
          originType: 'component',
          ownerComponentId: storedComponent.id,
          source,
        })
      })
    })

    generatedEndpoints
      // Every active endpoint is offered, including GetById: its `{id}` is filled
      // by the SqlDataSource from the page URL, exactly like Update and Delete.
      .filter((endpoint) => endpoint.isActive)
      .forEach((endpoint) => {
        const method = toDesignerHttpMethod(endpoint.method)
        const dataSourceKey = `${method}:${endpoint.path.trim()}:`
        if (items.has(dataSourceKey)) return
        const attached = document.dataSources.some(
          (source) => source.method === method && source.url.trim() === endpoint.path.trim(),
        )
        items.set(dataSourceKey, {
          attached,
          key: `generated:${endpoint.id}`,
          origin: 'CRUD Endpoint Manager',
          originType: 'crud',
          source: {
            id: `generated_${endpoint.id}`,
            name: `${endpoint.entityName} · ${endpoint.operationType}`,
            method,
            url: endpoint.path,
            responsePath: '',
          },
        })
      })

    return [...items.values()]
  }, [componentDetails, components, document.dataSources, generatedEndpoints, id])
  const reusableDataSources = useMemo(() => dataSourceCatalog, [dataSourceCatalog])

  const updateSelectedProp = (propertyName: string, value: unknown) => {
    if (!selectedId) return
    commitDocument((current) => ({
      ...current,
      nodes: updateNodeTree(current.nodes, selectedId, (node) => ({
        ...node,
        props: { ...node.props, [propertyName]: value },
      })),
    }))
  }

  const updateNodeProp = useCallback(
    (nodeId: string, propertyName: string, value: unknown) => {
      commitDocument((current) => ({
        ...current,
        nodes: updateNodeTree(current.nodes, nodeId, (node) => ({
          ...node,
          props: { ...node.props, [propertyName]: value },
        })),
      }))
    },
    [commitDocument],
  )

  const updateNodeEvent = (nodeId: string, eventName: string, value: string) => {
    commitDocument((current) => ({
      ...current,
      nodes: updateNodeTree(current.nodes, nodeId, (node) => ({
        ...node,
        events: { ...node.events, [eventName]: value },
      })),
    }))
  }

  const updateSelectedBinding = (propertyName: string, sourceId: string, path = '') => {
    if (!selectedId) return
    commitDocument((current) => ({
      ...current,
      nodes: updateNodeTree(current.nodes, selectedId, (node) => {
        const bindings = { ...(node.bindings || {}) }
        if (sourceId) bindings[propertyName] = { sourceId, path }
        else delete bindings[propertyName]
        return { ...node, bindings }
      }),
    }))
  }

  const updateSelectedBindingDetails = (
    propertyName: string,
    details: Partial<DesignerBinding>,
  ) => {
    if (!selectedId) return
    commitDocument((current) => ({
      ...current,
      nodes: updateNodeTree(current.nodes, selectedId, (node) => {
        const binding = node.bindings?.[propertyName]
        if (!binding) return node
        return {
          ...node,
          bindings: {
            ...node.bindings,
            [propertyName]: { ...binding, ...details },
          },
        }
      }),
    }))
  }

  const addDataSource = () => {
    const dataSource: DesignerDataSource = {
      id: `source_${createDesignerId().slice(-8)}`,
      name: `Endpoint ${document.dataSources.length + 1}`,
      method: 'GET',
      url: '',
      responsePath: '',
    }
    setCatalogSourceEditor({ item: null, draft: dataSource })
    setCatalogSourceTestResult(null)
  }

  const addReusableDataSource = (catalogItem: DataSourceCatalogItem) => {
    const existingSource = document.dataSources.find(
      (source) =>
        source.method === catalogItem.source.method &&
        source.url.trim() === catalogItem.source.url.trim() &&
        source.responsePath.trim() === catalogItem.source.responsePath.trim(),
    )
    // Only a directly callable GET source produces rows. A write endpoint or a
    // GetById is attached to a SqlDataSource command slot from the inspector.
    const bindsCollection =
      catalogItem.source.method === 'GET' && !hasSqlDataSourceUrlParams(catalogItem.source.url)
    if (existingSource) {
      if (!bindsCollection) {
        setDataPanelSourceId(existingSource.id)
        return
      }
      if (selectedId && isTabularDataComponent(selectedNode?.type)) {
        updateSelectedBinding('items', existingSource.id, '')
        setSelectDataModes((current) => ({ ...current, [selectedId]: 'endpoint' }))
      } else if (selectedId && isOptionDataComponent(selectedNode?.type)) {
        updateSelectedBinding(getOptionDataProperty(selectedNode?.type), existingSource.id, '')
        setSelectDataModes((current) => ({ ...current, [selectedId]: 'endpoint' }))
      }
      setDataPanelSourceId(existingSource.id)
      return
    }

    const dataSource: DesignerDataSource = {
      ...catalogItem.source,
      id: `source_${createDesignerId().slice(-8)}`,
    }
    commitDocument((current) => ({
      ...current,
      dataSources: [...current.dataSources, dataSource],
      nodes:
        bindsCollection &&
        selectedId &&
        (isTabularDataComponent(selectedNode?.type) || isOptionDataComponent(selectedNode?.type))
          ? updateNodeTree(current.nodes, selectedId, (node) => ({
              ...node,
              bindings: {
                ...node.bindings,
                [isTabularDataComponent(selectedNode?.type)
                  ? 'items'
                  : getOptionDataProperty(selectedNode?.type)]: {
                  sourceId: dataSource.id,
                  path: '',
                },
              },
            }))
          : current.nodes,
    }))
    if (
      bindsCollection &&
      selectedId &&
      (isOptionDataComponent(selectedNode?.type) || isTabularDataComponent(selectedNode?.type))
    ) {
      setSelectDataModes((current) => ({ ...current, [selectedId]: 'endpoint' }))
    }
    setDataPanelSourceId(dataSource.id)
  }

  /**
   * `urlOverride` carries a URL whose `{id}` was already filled in — a GetById
   * endpoint cannot be sampled otherwise, and without a sample the designer has
   * no columns to offer the components inside the SqlDataSource.
   */
  const testDataSource = useCallback(
    async (source: DesignerDataSource, showResult = false, urlOverride?: string) => {
      // Running a POST/PUT/DELETE endpoint would mutate real data, so write sources
      // are never executed from the designer — they are only wired to a command slot.
      if (source.method !== 'GET') {
        setDataTestResults((current) => ({
          ...current,
          [source.id]: {
            status: 'error',
            message: translate('::App.DeveloperKitComponentDesigner.MethodNotRunnableBindToSql', {
              method: source.method,
            }),
          },
        }))
        return
      }
      if (showResult) setEndpointResultModal(null)
      setDataTestResults((current) => ({
        ...current,
        [source.id]: {
          status: 'loading',
          message: translate('::App.DeveloperKitComponentDesigner.SendingRequest'),
        },
      }))
      const requestUrl = (urlOverride ?? source.url).trim()
      try {
        if (!requestUrl) {
          throw new Error(translate('::App.DeveloperKitComponentDesigner.EndpointUrlRequired'))
        }
        if (!requestUrl.startsWith('/api/')) {
          throw new Error(
            translate('::App.DeveloperKitComponentDesigner.EndpointMustStartWithApi'),
          )
        }
        if (!isRunnableDataSourceUrl(requestUrl)) {
          throw new Error(translate('::App.DeveloperKitComponentDesigner.EndpointNotRunnable'))
        }
        if (hasSqlDataSourceUrlParams(requestUrl)) {
          throw new Error(translate('::App.DeveloperKitComponentDesigner.EndpointNeedsKey'))
        }
        const response = await apiService.fetchData({ method: source.method, url: requestUrl })
        const result = resolveDesignerResponse(response.data, source.responsePath)
        if (source.responsePath.trim() && result === undefined) {
          throw new Error(
            translate('::App.DeveloperKitComponentDesigner.ResponsePathNotFound', {
              path: source.responsePath,
            }),
          )
        }
        const message =
          typeof result === 'string' ? result : (JSON.stringify(result, null, 2) ?? String(result))
        setDataTestResults((current) => ({
          ...current,
          [source.id]: { status: 'success', message },
        }))
        setDataSourceSamples((current) => ({ ...current, [source.id]: result }))
        if (showResult) setEndpointResultModal({ source, result })
      } catch (error) {
        setDataSourceSamples((current) => {
          const next = { ...current }
          delete next[source.id]
          return next
        })
        setDataTestResults((current) => ({
          ...current,
          [source.id]: { status: 'error', message: getSaveErrorMessage(error, translate) },
        }))
      }
    },
    [],
  )

  const persistCatalogOwnerDocument = useCallback(
    async (item: DataSourceCatalogItem, nextDocument: DesignerDocument) => {
      if (item.originType !== 'component' || !item.ownerComponentId) {
        throw new Error(translate('::App.DeveloperKitComponentDesigner.CatalogReadOnly'))
      }

      const owner =
        componentDetails?.id === item.ownerComponentId
          ? componentDetails
          : components.find((storedComponent) => storedComponent.id === item.ownerComponentId)
      if (!owner)
        throw new Error(translate('::App.DeveloperKitComponentDesigner.OwnerComponentNotFound'))

      let existingProps: Record<string, unknown> = {}
      try {
        const parsedProps = owner.props ? JSON.parse(owner.props) : {}
        if (parsedProps && typeof parsedProps === 'object' && !Array.isArray(parsedProps)) {
          existingProps = parsedProps
        }
      } catch {
        existingProps = {}
      }

      const update = {
        name: owner.name,
        routePath: owner.routePath,
        description: owner.description,
        dependencies: owner.dependencies,
        code:
          nextDocument.sourceMode === 'visual'
            ? generateDesignerCode(owner.name, nextDocument)
            : owner.code,
        props: JSON.stringify({ ...existingProps, visualDesigner: nextDocument }),
        isActive: owner.isActive,
      }
      await updateComponent(owner.id, update)
      return update
    },
    [componentDetails, components, updateComponent],
  )

  const openCatalogSourceEditor = (item: DataSourceCatalogItem) => {
    if (item.originType !== 'component') return
    setCatalogSourceEditor({ item, draft: { ...item.source } })
    setCatalogSourceTestResult(null)
  }

  const updateCatalogSourceDraft = (updates: Partial<DesignerDataSource>) => {
    const sourceId = catalogSourceEditor?.draft.id
    if (sourceId) {
      setDataSourceSamples((samples) => {
        const next = { ...samples }
        delete next[sourceId]
        return next
      })
    }
    setCatalogSourceEditor((current) =>
      current ? { ...current, draft: { ...current.draft, ...updates } } : current,
    )
    setCatalogSourceTestResult(null)
  }

  const testCatalogSource = async () => {
    if (!catalogSourceEditor) return
    const source = catalogSourceEditor.draft
    if (source.method !== 'GET') {
      setCatalogSourceTestResult({
        status: 'error',
        message: translate('::App.DeveloperKitComponentDesigner.MethodNotRunnableWrites', {
          method: source.method,
        }),
      })
      return
    }
    setCatalogSourceTestResult({
      status: 'loading',
      message: translate('::App.DeveloperKitComponentDesigner.SendingRequest'),
    })
    try {
      if (!source.name.trim())
        throw new Error(translate('::App.DeveloperKitComponentDesigner.EndpointNameRequired'))
      if (!isRunnableDataSourceUrl(source.url)) {
        throw new Error(translate('::App.DeveloperKitComponentDesigner.EndpointUrlInvalid'))
      }
      const response = await apiService.fetchData({ method: source.method, url: source.url.trim() })
      const result = resolveDesignerResponse(response.data, source.responsePath)
      if (source.responsePath.trim() && result === undefined) {
        throw new Error(
          translate('::App.DeveloperKitComponentDesigner.ResponsePathNotFound', {
            path: source.responsePath,
          }),
        )
      }
      setCatalogSourceTestResult({
        status: 'success',
        message:
          typeof result === 'string' ? result : (JSON.stringify(result, null, 2) ?? String(result)),
      })
      setDataSourceSamples((current) => ({ ...current, [source.id]: result }))
      setEndpointResultModal({ source, result })
    } catch (error) {
      setDataSourceSamples((current) => {
        const next = { ...current }
        delete next[source.id]
        return next
      })
      setCatalogSourceTestResult({
        status: 'error',
        message: getSaveErrorMessage(error, translate),
      })
    }
  }

  const saveCatalogSource = async () => {
    if (!catalogSourceEditor) return
    const { item, draft } = catalogSourceEditor
    if (!draft.name.trim()) {
      setCatalogSourceTestResult({
        status: 'error',
        message: translate('::App.DeveloperKitComponentDesigner.EndpointNameRequired'),
      })
      return
    }
    if (!isRunnableDataSourceUrl(draft.url)) {
      setCatalogSourceTestResult({
        status: 'error',
        message: translate('::App.DeveloperKitComponentDesigner.EndpointUrlInvalid'),
      })
      return
    }
    // A write endpoint cannot be verified without side effects, so the successful
    // run is only demanded from GET sources.
    if (draft.method === 'GET' && catalogSourceTestResult?.status !== 'success') {
      setCatalogSourceTestResult({
        status: 'error',
        message: translate('::App.DeveloperKitComponentDesigner.RunEndpointBeforeSave'),
      })
      return
    }

    if (!item) {
      if (!id || !componentDetails) return
      setIsCatalogSourceSaving(true)
      try {
        const storedDocument = parseDesignerDocument(componentDetails.props)
        const baseDocument = storedDocument || { ...document, dataSources: [] }
        const nextDocument: DesignerDocument = {
          ...baseDocument,
          dataSources: [
            ...baseDocument.dataSources.filter((source) => source.id !== draft.id),
            draft,
          ],
        }
        const catalogItem: DataSourceCatalogItem = {
          attached: true,
          key: `component:${id}:${draft.id}`,
          origin: translate('::App.DeveloperKitComponentDesigner.OriginComponent', {
            name: componentDetails.name,
          }),
          originType: 'component',
          ownerComponentId: id,
          source: draft,
        }
        const update = await persistCatalogOwnerDocument(catalogItem, nextDocument)
        const localDocument: DesignerDocument = {
          ...document,
          dataSources: [...document.dataSources.filter((source) => source.id !== draft.id), draft],
        }
        setDocument(localDocument)
        setDataPanelSourceId(draft.id)
        setComponentDetails((current) => {
          if (!current || current.id !== id) return current
          return { ...current, ...update, lastModificationTime: new Date().toISOString() }
        })
        setSavedCode(update.code)
        setSavedDesignerFingerprint(JSON.stringify(nextDocument))
        setCatalogSourceEditor(null)
        setCatalogSourceTestResult(null)
        toast.push(
          <Notification type="success" duration={2400}>
            {translate('::App.DeveloperKitComponentDesigner.EndpointAdded')}
          </Notification>,
          { placement: 'bottom-end' },
        )
      } catch (error) {
        setCatalogSourceTestResult({
          status: 'error',
          message: getSaveErrorMessage(error, translate),
        })
      } finally {
        setIsCatalogSourceSaving(false)
      }
      return
    }

    const owner =
      componentDetails?.id === item.ownerComponentId
        ? componentDetails
        : components.find((storedComponent) => storedComponent.id === item.ownerComponentId)
    const ownerDocument = parseDesignerDocument(owner?.props)
    if (!ownerDocument) {
      setCatalogSourceTestResult({
        status: 'error',
        message: translate('::App.DeveloperKitComponentDesigner.DesignSchemaUnreadable'),
      })
      return
    }

    setIsCatalogSourceSaving(true)
    try {
      const nextDocument = {
        ...ownerDocument,
        dataSources: ownerDocument.dataSources.map((source) =>
          source.id === item.source.id ? { ...draft, id: source.id } : source,
        ),
      }
      const update = await persistCatalogOwnerDocument(item, nextDocument)
      if (item.ownerComponentId === id) {
        setDocument((current) => ({
          ...current,
          dataSources: current.dataSources.map((source) =>
            source.id === item.source.id ? { ...draft, id: source.id } : source,
          ),
        }))
        setComponentDetails((current) => {
          if (!current || current.id !== id) return current
          return { ...current, ...update, lastModificationTime: new Date().toISOString() }
        })
        setSavedCode(update.code)
        setSavedDesignerFingerprint(JSON.stringify(nextDocument))
      }
      setCatalogSourceEditor(null)
      setCatalogSourceTestResult(null)
      toast.push(
        <Notification type="success" duration={2400}>
          {translate('::App.DeveloperKitComponentDesigner.EndpointUpdated')}
        </Notification>,
        { placement: 'bottom-end' },
      )
    } catch (error) {
      setCatalogSourceTestResult({
        status: 'error',
        message: getSaveErrorMessage(error, translate),
      })
    } finally {
      setIsCatalogSourceSaving(false)
    }
  }

  const deleteCatalogSource = async (item: DataSourceCatalogItem) => {
    if (item.originType !== 'component') return
    const owner =
      componentDetails?.id === item.ownerComponentId
        ? componentDetails
        : components.find((storedComponent) => storedComponent.id === item.ownerComponentId)
    const ownerDocument =
      item.ownerComponentId === id ? document : parseDesignerDocument(owner?.props)
    if (!ownerDocument) return
    if (
      !window.confirm(
        translate('::App.DeveloperKitComponentDesigner.EndpointDeleteConfirm', {
          name: item.source.name,
        }),
      )
    )
      return

    try {
      const nextDocument = {
        ...ownerDocument,
        dataSources: ownerDocument.dataSources.filter((source) => source.id !== item.source.id),
        nodes: removeDataSourceBindings(ownerDocument.nodes, item.source.id),
      }
      const update = await persistCatalogOwnerDocument(item, nextDocument)
      if (item.ownerComponentId === id) {
        setDocument(nextDocument)
        setComponentDetails((current) => {
          if (!current || current.id !== id) return current
          return { ...current, ...update, lastModificationTime: new Date().toISOString() }
        })
        setSavedCode(update.code)
        setSavedDesignerFingerprint(JSON.stringify(nextDocument))
      }
      toast.push(
        <Notification type="success" duration={2400}>
          {translate('::App.DeveloperKitComponentDesigner.EndpointDeleted')}
        </Notification>,
        { placement: 'bottom-end' },
      )
    } catch (error) {
      toast.push(
        <Notification type="danger" duration={4000}>
          {getSaveErrorMessage(error, translate)}
        </Notification>,
        { placement: 'bottom-end' },
      )
    }
  }

  const deleteNode = useCallback(
    (nodeId: string) => {
      commitDocument((current) => ({ ...current, nodes: removeNodeTree(current.nodes, nodeId) }))
      setSelectedId((current) => (current === nodeId ? null : current))
    },
    [commitDocument],
  )

  const duplicateNode = useCallback(
    (nodeId: string) => {
      commitDocument((current) => ({ ...current, nodes: duplicateInTree(current.nodes, nodeId) }))
    },
    [commitDocument],
  )

  const moveNode = useCallback(
    (nodeId: string, direction: -1 | 1) => {
      commitDocument((current) => ({
        ...current,
        nodes: moveInTree(current.nodes, nodeId, direction),
      }))
    },
    [commitDocument],
  )

  const moveNodeIntoContainerNode = useCallback(
    (nodeId: string, parentId: string | null, slot?: string) => {
      commitDocument((current) => ({
        ...current,
        nodes: moveNodeIntoContainer(current.nodes, nodeId, parentId, slot),
      }))
      selectDesignerNode(nodeId)
    },
    [commitDocument, selectDesignerNode],
  )

  const reorderNode = useCallback(
    (sourceId: string, targetId: string, placement: 'before' | 'after') => {
      commitDocument((current) => ({
        ...current,
        nodes: reorderNodeTree(current.nodes, sourceId, targetId, placement),
      }))
      selectDesignerNode(sourceId)
    },
    [commitDocument, selectDesignerNode],
  )

  const collectDependencies = useCallback(() => {
    const names = new Set<string>()
    walkDesignerNodes(document.nodes, (node) => {
      if (node.kind === 'custom') names.add(node.type)
    })
    return [...names]
  }, [document.nodes])

  const handleSave = useCallback(
    async (successMessage = translate('::App.DeveloperKitComponentDesigner.ComponentSaved')) => {
      if (!id || !component) return
      setIsSaving(true)
      try {
        const invalidDataSource = document.dataSources.find(
          (source) => source.url.trim() && !source.url.trim().startsWith('/api/'),
        )
        if (invalidDataSource) {
          throw new Error(
            translate('::App.DeveloperKitComponentDesigner.DataSourceMustStartWithApi', {
              name: invalidDataSource.name,
            }),
          )
        }
        let existingProps: Record<string, unknown> = {}
        try {
          const parsed = component.props ? JSON.parse(component.props) : {}
          if (parsed && typeof parsed === 'object' && !Array.isArray(parsed)) existingProps = parsed
        } catch {
          existingProps = {}
        }
        const codeToSave = document.sourceMode === 'visual' ? generatedCode : manualCode
        const dependenciesToSave = JSON.stringify(
          document.sourceMode === 'visual'
            ? collectDependencies()
            : (() => {
                try {
                  return JSON.parse(component.dependencies || '[]')
                } catch {
                  return []
                }
              })(),
        )
        const propsToSave =
          document.sourceMode === 'visual'
            ? JSON.stringify({ ...existingProps, visualDesigner: document })
            : component.props
        const update = {
          name: component.name,
          routePath: component.routePath,
          description: component.description,
          dependencies: dependenciesToSave,
          code: codeToSave.trim(),
          props: propsToSave,
          isActive: component.isActive,
        }
        await updateComponent(id, update)
        setComponentDetails((current) =>
          current?.id === id
            ? { ...current, ...update, lastModificationTime: new Date().toISOString() }
            : current,
        )
        setSavedCode(codeToSave)
        setSavedDesignerFingerprint(JSON.stringify(document))
        toast.push(
          <Notification type="success" duration={2400}>
            {successMessage}
          </Notification>,
          { placement: 'bottom-end' },
        )
      } catch (error) {
        console.error('Visual component save failed:', error)
        const errorMessage = getSaveErrorMessage(error, translate)
        toast.push(
          <Notification type="danger" duration={4000}>
            {errorMessage}
          </Notification>,
          { placement: 'bottom-end' },
        )
      } finally {
        setIsSaving(false)
      }
    },
    [collectDependencies, component, document, generatedCode, id, manualCode, updateComponent],
  )

  useEffect(() => {
    const keyHandler = (event: KeyboardEvent) => {
      const target = event.target
      const isPropertyEditing =
        target instanceof HTMLElement &&
        Boolean(
          target.closest(
            '[data-property-panel], input, textarea, select, [contenteditable="true"], [role="textbox"], .monaco-editor',
          ),
        )
      if ((event.ctrlKey || event.metaKey) && event.key.toLowerCase() === 's') {
        event.preventDefault()
        void handleSave()
      }
      if ((event.ctrlKey || event.metaKey) && event.key.toLowerCase() === 'z') {
        event.preventDefault()
        if (event.shiftKey) redo()
        else undo()
      }
      if (event.key === 'Delete' && !isPropertyEditing && selectedId && workspaceTab === 'design') {
        deleteNode(selectedId)
      }
      if ((event.ctrlKey || event.metaKey) && event.shiftKey && event.key.toLowerCase() === 'k') {
        event.preventDefault()
        setScriptApiOpen((current) => !current)
      }
      if (event.key === 'Escape') setScriptApiOpen(false)
    }
    window.addEventListener('keydown', keyHandler)
    return () => window.removeEventListener('keydown', keyHandler)
  }, [deleteNode, handleSave, redo, selectedId, undo, workspaceTab])

  const filteredCatalog = useMemo(() => {
    const term = search.trim().toLocaleLowerCase('tr')
    return catalog.filter(
      (item) =>
        !term ||
        `${item.name} ${translate('::' + item.description)} ${item.category}`
          .toLocaleLowerCase('tr')
          .includes(term),
    )
  }, [catalog, search, translate])

  const groupedCatalog = useMemo(() => {
    const groups = new Map<
      DesignerComponentDefinition['toolboxGroup'],
      DesignerComponentDefinition[]
    >(TOOLBOX_GROUP_ORDER.map((group) => [group, []]))
    filteredCatalog.forEach((item) => {
      groups.get(item.toolboxGroup)?.push(item)
    })
    return TOOLBOX_GROUP_ORDER.map(
      (group) =>
        [
          group,
          [...(groups.get(group) || [])].sort((left, right) =>
            left.name.localeCompare(right.name, 'tr', { sensitivity: 'base' }),
          ),
        ] as const,
    ).filter(([, definitions]) => definitions.length > 0)
  }, [filteredCatalog])

  const activeDataSource = inspectorDataSources.find((source) => source.id === dataPanelSourceId)
  const activeDataSample = activeDataSource ? previewDataValues[activeDataSource.id] : undefined

  /**
   * Reads every GET endpoint that has no sample yet: the ones stored with the
   * document, and any attached later from the reusable catalog. Without this a
   * freshly attached endpoint shows up as selected in the inspector while its
   * column list — and therefore the label/value mapping — stays empty.
   * A recorded test result means it already ran, so failures do not loop.
   */
  useEffect(() => {
    if (!id || loadedId !== id) return
    // A GetById Select is sampled through the owning SqlDataSource's preview key,
    // since there is no page URL to read the real key from while designing.
    const previewUrls = new Map<string, string>()
    walkDesignerNodes(document.nodes, (node) => {
      if (!isSqlDataSourceNode(node.type)) return
      const previewKey = getSqlDataSourcePreviewKey(node)
      if (!previewKey) return
      const source = document.dataSources.find(
        (item) => item.id === getSqlDataSourceEndpointId(node, 'selectEndpoint'),
      )
      if (!source) return
      const parameterName = getSqlDataSourceKeyParam(node)
      const bound = bindSqlDataSourceUrl(source.url, { [parameterName]: previewKey }, parameterName)
      previewUrls.set(
        source.id,
        bound.keyBound
          ? bound.url
          : appendSqlDataSourceQueryParam(bound.url, parameterName, previewKey),
      )
    })

    document.dataSources.forEach((source) => {
      if (source.method !== 'GET') return
      if (dataSourceSamples[source.id] !== undefined || dataTestResults[source.id]) return
      const requestUrl = previewUrls.get(source.id) ?? source.url
      // An unresolved `{id}` would just 404; it waits for a preview key instead.
      if (hasSqlDataSourceUrlParams(requestUrl) || !isRunnableDataSourceUrl(requestUrl)) return
      void testDataSource(source, false, requestUrl)
    })
  }, [
    dataSourceSamples,
    dataTestResults,
    document.dataSources,
    document.nodes,
    id,
    loadedId,
    testDataSource,
  ])
  const optionDataProperty = getOptionDataProperty(selectedNode?.type)
  const selectOptionsBinding = isOptionDataComponent(selectedNode?.type)
    ? selectedNode?.bindings?.[optionDataProperty]
    : undefined
  const selectOptionColumns = getDesignerBindingColumns(selectOptionsBinding)
  const tabularItemsBinding = isTabularDataComponent(selectedNode?.type)
    ? selectedNode?.bindings?.items
    : undefined
  const selectDataMode =
    selectedId &&
    (isOptionDataComponent(selectedNode?.type) || isTabularDataComponent(selectedNode?.type))
      ? selectDataModes[selectedId] ||
        (selectOptionsBinding?.sourceId || tabularItemsBinding?.sourceId ? 'endpoint' : 'static')
      : 'static'
  const staticSelectOptions: StaticSelectOption[] =
    isOptionDataComponent(selectedNode?.type) &&
    Array.isArray(selectedNode?.props[optionDataProperty])
      ? (selectedNode.props[optionDataProperty] as unknown[]).map((option, index) => {
          if (option && typeof option === 'object' && !Array.isArray(option)) {
            const record = option as Record<string, unknown>
            return {
              label: String(
                record.label ??
                  record.children ??
                  record.title ??
                  translate('::App.DeveloperKitComponentDesigner.OptionN', { index: index + 1 }),
              ),
              value: record.value ?? record.eventKey ?? record.key ?? index + 1,
            }
          }
          return { label: String(option ?? ''), value: option ?? index + 1 }
        })
      : []
  const selectCollectionPaths = useMemo(() => {
    if (activeDataSample === undefined) return []
    const paths = discoverDataFields(activeDataSample)
      .filter((field) => field.type === 'array')
      .map((field) => field.path)
    return Array.isArray(activeDataSample) ? ['', ...paths] : paths
  }, [activeDataSample])
  const tabularCollectionPaths = useMemo(() => {
    if (activeDataSample === undefined) return []
    const paths = discoverDataFields(activeDataSample)
      .filter((field) => field.type === 'array')
      .map((field) => field.path)
    return Array.isArray(activeDataSample) ? ['', ...paths] : paths
  }, [activeDataSample])
  const selectCollectionSample = useMemo(() => {
    if (activeDataSample === undefined) return undefined
    const path = selectOptionsBinding?.path || ''
    const value = getDesignerValueByPath(activeDataSample, path)
    return Array.isArray(value) ? value : undefined
  }, [activeDataSample, selectOptionsBinding?.path])
  const selectColumnFields = useMemo(
    () =>
      selectCollectionSample === undefined
        ? []
        : discoverDataFields(selectCollectionSample).filter(
            (field) => !['array', 'object'].includes(field.type),
          ),
    [selectCollectionSample],
  )

  const setSelectDataMode = (mode: 'static' | 'endpoint') => {
    if (
      !selectedId ||
      (!isOptionDataComponent(selectedNode?.type) && !isTabularDataComponent(selectedNode?.type))
    )
      return
    setSelectDataModes((current) => ({ ...current, [selectedId]: mode }))
    if (isTabularDataComponent(selectedNode?.type)) {
      // Only a source the picker lists can be bound; a POST/PUT entry or the
      // SqlDataSource record would silently produce an unusable collection.
      const source = activeDataSource || inspectorDataSources[0]
      commitDocument((current) => ({
        ...current,
        nodes: updateNodeTree(current.nodes, selectedId, (node) => {
          const bindings = { ...(node.bindings || {}) }
          const props = { ...node.props }
          delete props.dataColumns
          if (mode === 'endpoint' && source) {
            bindings.items = { sourceId: source.id, path: '' }
          } else {
            delete bindings.items
          }
          return { ...node, bindings, props }
        }),
      }))
      if (mode === 'static') {
        const staticItems = Array.isArray(selectedNode?.props.items) ? selectedNode.props.items : []
        setStaticCollectionDrafts((current) => ({
          ...current,
          [selectedId]: JSON.stringify(staticItems, null, 2),
        }))
        setStaticCollectionErrors((current) => ({ ...current, [selectedId]: '' }))
      } else if (source && dataSourceSamples[source.id] === undefined) {
        void testDataSource(source)
      }
      return
    }
    if (mode === 'static') {
      updateSelectedBinding(optionDataProperty, '')
      return
    }
    const source = activeDataSource || inspectorDataSources[0]
    if (source) {
      updateSelectedBinding(optionDataProperty, source.id, '')
      if (dataSourceSamples[source.id] === undefined) void testDataSource(source)
    }
  }

  const updateStaticSelectOptions = (options: StaticSelectOption[]) => {
    updateSelectedBinding(optionDataProperty, '')
    updateSelectedProp(optionDataProperty, options)
    if (selectedId) {
      setSelectDataModes((current) => ({ ...current, [selectedId]: 'static' }))
    }
  }
  const updateStaticCollection = (rawValue: string) => {
    if (!selectedId || !isTabularDataComponent(selectedNode?.type)) return
    setStaticCollectionDrafts((current) => ({ ...current, [selectedId]: rawValue }))
    try {
      const value = JSON.parse(rawValue)
      if (!Array.isArray(value))
        throw new Error(translate('::App.DeveloperKitComponentDesigner.StaticDataMustBeArray'))
      setStaticCollectionErrors((current) => ({ ...current, [selectedId]: '' }))
      commitDocument((current) => ({
        ...current,
        nodes: updateNodeTree(current.nodes, selectedId, (node) => {
          const bindings = { ...(node.bindings || {}) }
          delete bindings.items
          const previousFields = discoverDataFields(node.props.items)
            .filter((field) => !['array', 'object'].includes(field.type))
            .map((field) => field.path)
          const nextFields = discoverDataFields(value)
            .filter((field) => !['array', 'object'].includes(field.type))
            .map((field) => field.path)
          const props: Record<string, unknown> = { ...node.props, items: value }
          if (previousFields.join('|') !== nextFields.join('|')) delete props.dataColumns
          return { ...node, bindings, props }
        }),
      }))
      setSelectDataModes((current) => ({ ...current, [selectedId]: 'static' }))
    } catch (error) {
      setStaticCollectionErrors((current) => ({
        ...current,
        [selectedId]:
          error instanceof Error
            ? error.message
            : translate('::App.DeveloperKitComponentDesigner.InvalidJson'),
      }))
    }
  }
  const repeatedGridAncestor = [...selectedAncestors]
    .reverse()
    .find((node) => node.type === 'Grid' && node.bindings?.items?.sourceId)
  const isActiveRepeatedSource =
    repeatedGridAncestor?.bindings.items.sourceId === activeDataSource?.id
  const activeBindingSample =
    isTabularDataComponent(selectedNode?.type) && selectDataMode === 'static'
      ? selectedNode?.props.items
      : isTabularDataComponent(selectedNode?.type) &&
          tabularItemsBinding?.sourceId === activeDataSource?.id &&
          activeDataSample !== undefined
        ? getDesignerValueByPath(activeDataSample, tabularItemsBinding?.path || '')
        : activeDataSample !== undefined && isActiveRepeatedSource
          ? getDesignerValueByPath(
              activeDataSample,
              repeatedGridAncestor?.bindings.items.path || '',
            )
          : activeDataSample
  const activeDataFields = useMemo(
    () => (activeBindingSample === undefined ? [] : discoverDataFields(activeBindingSample)),
    [activeBindingSample],
  )
  const gridColumnFields = useMemo(
    () => activeDataFields.filter((field) => !['array', 'object'].includes(field.type)),
    [activeDataFields],
  )
  const configuredGridColumns =
    isTabularDataComponent(selectedNode?.type) && Array.isArray(selectedNode?.props.dataColumns)
      ? selectedNode.props.dataColumns.filter(
          (column): column is string => typeof column === 'string',
        )
      : null
  const selectedGridColumns = configuredGridColumns
    ? configuredGridColumns.filter((column) =>
        gridColumnFields.some((field) => field.path === column),
      )
    : gridColumnFields.map((field) => field.path)
  const allGridColumnsSelected =
    gridColumnFields.length > 0 && selectedGridColumns.length === gridColumnFields.length

  const toggleGridColumn = (columnPath: string) => {
    const nextColumns = selectedGridColumns.includes(columnPath)
      ? selectedGridColumns.filter((column) => column !== columnPath)
      : [...selectedGridColumns, columnPath]
    updateSelectedProp('dataColumns', nextColumns)
  }

  const toggleAllGridColumns = () => {
    updateSelectedProp(
      'dataColumns',
      allGridColumnsSelected ? [] : gridColumnFields.map((field) => field.path),
    )
  }

  useEffect(() => {
    if (
      !selectedId ||
      !isTabularDataComponent(selectedNode?.type) ||
      configuredGridColumns !== null ||
      !gridColumnFields.length
    ) {
      return
    }
    commitDocument((current) => ({
      ...current,
      nodes: updateNodeTree(current.nodes, selectedId, (node) => ({
        ...node,
        props: { ...node.props, dataColumns: gridColumnFields.map((field) => field.path) },
      })),
    }))
  }, [commitDocument, configuredGridColumns, gridColumnFields, selectedId, selectedNode?.type])

  useEffect(() => {
    const itemsBinding = isTabularDataComponent(selectedNode?.type)
      ? selectedNode?.bindings?.items
      : undefined
    if (
      !selectedId ||
      !itemsBinding?.sourceId ||
      itemsBinding.sourceId !== activeDataSource?.id ||
      activeDataSample === undefined
    ) {
      return
    }

    const currentValue = getDesignerValueByPath(activeDataSample, itemsBinding.path)
    if (Array.isArray(currentValue)) return

    const collectionPath = Array.isArray(activeDataSample)
      ? ''
      : discoverDataFields(activeDataSample).find((field) => field.type === 'array')?.path
    if (collectionPath === undefined || collectionPath === itemsBinding.path) return

    commitDocument((current) => ({
      ...current,
      nodes: updateNodeTree(current.nodes, selectedId, (node) => ({
        ...node,
        bindings: {
          ...node.bindings,
          items: { sourceId: itemsBinding.sourceId, path: collectionPath },
        },
      })),
    }))
  }, [activeDataSample, activeDataSource?.id, commitDocument, selectedId, selectedNode])

  const dataBindableProperties =
    selectedNode &&
    selectedDefinition &&
    (isDataCategoryComponent(selectedDefinition) || Boolean(sqlScopeNode))
      ? selectedDefinition.properties.filter(
          (property) =>
            property.category !== 'events' &&
            property.type !== 'function' &&
            (isTabularDataComponent(selectedNode.type)
              ? property.name === 'items'
              : isOptionDataComponent(selectedNode.type)
                ? property.name === getOptionDataProperty(selectedNode.type)
                : sqlScopeLocked
                  ? // A record field only needs the props that carry data.
                    getSqlRecordFieldOrder(property.name) >= 0
                  : DATA_BINDABLE_PROPERTY_NAMES.has(property.name) ||
                    property.type === 'array' ||
                    ['number', 'boolean', 'string', 'select'].includes(property.type)),
        )
      : []
  const orderedBindableProperties = sqlScopeLocked
    ? [...dataBindableProperties].sort(
        (left, right) => getSqlRecordFieldOrder(left.name) - getSqlRecordFieldOrder(right.name),
      )
    : dataBindableProperties

  const isCollectionProperty = (propertyName: string, propertyType: string) =>
    propertyType === 'array' || ['items', 'data', 'dataSource', 'options'].includes(propertyName)

  const getBindingChoice = (propertyName: string) => {
    const binding = selectedNode?.bindings?.[propertyName]
    if (!binding || binding.sourceId !== activeDataSource?.id) return ''
    const path = binding.path.trim()
    if (!path || path === '$item' || path === '0') return '__root__'
    if (isActiveRepeatedSource && path.startsWith('$item.')) return path.slice(6)
    if (Array.isArray(activeBindingSample) && path.startsWith('0.')) return path.slice(2)
    return path
  }

  const getBindingPath = (fieldPath: string, collection: boolean) => {
    if (fieldPath === '__root__') {
      if (isActiveRepeatedSource) return '$item'
      if (Array.isArray(activeBindingSample) && !collection) return '0'
      return ''
    }
    if (isActiveRepeatedSource) return `$item.${fieldPath}`
    if (Array.isArray(activeBindingSample)) return `0.${fieldPath}`
    return fieldPath
  }

  const renderReusableDataSources = (compact = false) => {
    const visibleSources = reusableDataSources
    return (
      <div className="space-y-2">
        {endpointCatalogLoading && !visibleSources.length ? (
          <p className="rounded-lg border border-dashed border-slate-300 p-3 text-center text-xs text-slate-500 dark:border-slate-700">
            {translate('::App.DeveloperKitComponentDesigner.LoadingSavedEndpoints')}
          </p>
        ) : visibleSources.length ? (
          visibleSources.map((item) => (
            <div
              key={item.key}
              className="flex items-center gap-2 rounded-lg border border-slate-200 bg-white p-2.5 dark:border-slate-800 dark:bg-slate-900"
            >
              <div className="min-w-0 flex-1">
                <div className="truncate text-xs font-semibold text-slate-700 dark:text-slate-200">
                  {item.source.name}
                </div>
                <div className="truncate font-mono text-[9px] text-sky-600">
                  {item.source.method} {item.source.url}
                </div>
                {!compact && (
                  <div className="flex items-center gap-1.5 text-[9px] text-slate-400">
                    <span>{item.origin}</span>
                    {item.attached && (
                      <span className="rounded bg-emerald-100 px-1 py-0.5 font-semibold text-emerald-700 dark:bg-emerald-950 dark:text-emerald-300">
                        Ekli
                      </span>
                    )}
                  </div>
                )}
              </div>
              <div className="flex shrink-0 items-center gap-1">
                <button
                  className="rounded-md bg-sky-600 px-2.5 py-1.5 text-[10px] font-semibold text-white hover:bg-sky-700"
                  type="button"
                  onClick={() => addReusableDataSource(item)}
                >
                  {translate('::App.DeveloperKitComponentDesigner.Use')}
                </button>
                {item.originType === 'component' && (
                  <>
                    <button
                      className="rounded-md border border-slate-200 p-1.5 text-slate-500 hover:border-amber-400 hover:text-amber-600 dark:border-slate-700"
                      title={translate('::App.DeveloperKitComponentDesigner.EditEndpoint')}
                      type="button"
                      onClick={() => openCatalogSourceEditor(item)}
                    >
                      <FaEdit />
                    </button>
                    <button
                      className="rounded-md border border-slate-200 p-1.5 text-slate-500 hover:border-red-400 hover:text-red-600 dark:border-slate-700"
                      title={translate('::App.DeveloperKitComponentDesigner.DeleteEndpoint')}
                      type="button"
                      onClick={() => void deleteCatalogSource(item)}
                    >
                      <FaTrash />
                    </button>
                  </>
                )}
              </div>
            </div>
          ))
        ) : (
          <p className="rounded-lg border border-dashed border-slate-300 p-3 text-center text-xs leading-5 text-slate-500 dark:border-slate-700">
            {translate('::App.DeveloperKitComponentDesigner.NoMoreEndpoints')}
          </p>
        )}
        {endpointCatalogError && (
          <p className="rounded bg-amber-50 p-2 text-[10px] leading-4 text-amber-700 dark:bg-amber-950 dark:text-amber-200">
            {translate('::App.DeveloperKitComponentDesigner.CatalogReadFailed')}:{' '}
            {endpointCatalogError}
          </p>
        )}
      </div>
    )
  }

  const renderSelectDataModeSelector = () => {
    if (!isOptionDataComponent(selectedNode?.type) && !isTabularDataComponent(selectedNode?.type))
      return null
    return (
      <div className="rounded-lg border border-slate-200 p-3 dark:border-slate-800">
        <div className="mb-2 text-[10px] font-semibold uppercase tracking-wider text-slate-400">
          {translate('::App.Listform.ListformField.DataSourceType')}
        </div>
        <div className="grid grid-cols-2 gap-1 rounded-md bg-slate-100 p-1 dark:bg-slate-950">
          {(['static', 'endpoint'] as const).map((mode) => (
            <button
              key={mode}
              className={`rounded px-2 py-1.5 text-[10px] font-semibold ${
                selectDataMode === mode
                  ? 'bg-white text-sky-700 shadow-sm dark:bg-slate-800 dark:text-sky-300'
                  : 'text-slate-500'
              }`}
              type="button"
              onClick={() => setSelectDataMode(mode)}
            >
              {mode === 'static'
                ? isOptionDataComponent(selectedNode?.type)
                  ? translate('::App.DeveloperKitComponentDesigner.StaticOptions')
                  : translate('::App.DeveloperKitComponentDesigner.StaticData')
                : 'Endpoint'}
            </button>
          ))}
        </div>
      </div>
    )
  }

  const renderSelectDataConfiguration = () => {
    if (!isOptionDataComponent(selectedNode?.type)) return null
    return (
      <div className="rounded-lg border border-slate-200 p-3 dark:border-slate-800">
        {selectDataMode === 'static' ? (
          <div className="space-y-2">
            <div className="mb-2 text-[10px] font-semibold uppercase tracking-wider text-slate-400">
              {translate('::App.DeveloperKitComponentDesigner.StaticOptions')}
            </div>
            {staticSelectOptions.map((option, index) => (
              <div key={index} className="grid grid-cols-[1fr_1fr_auto] gap-1">
                <input
                  aria-label={translate('::App.DeveloperKitComponentDesigner.OptionLabelAria', {
                    index: index + 1,
                  })}
                  className="min-w-0 rounded border border-slate-300 bg-white px-2 py-1.5 text-[10px] dark:border-slate-700 dark:bg-slate-900"
                  placeholder={translate('::App.DeveloperKitComponentDesigner.LabelHeader')}
                  value={option.label}
                  onChange={(event) =>
                    updateStaticSelectOptions(
                      staticSelectOptions.map((current, optionIndex) =>
                        optionIndex === index ? { ...current, label: event.target.value } : current,
                      ),
                    )
                  }
                />
                <input
                  aria-label={translate('::App.DeveloperKitComponentDesigner.OptionValueAria', {
                    index: index + 1,
                  })}
                  className="min-w-0 rounded border border-slate-300 bg-white px-2 py-1.5 text-[10px] dark:border-slate-700 dark:bg-slate-900"
                  placeholder={translate('::App.Listform.ListformField.Value')}
                  value={String(option.value ?? '')}
                  onChange={(event) =>
                    updateStaticSelectOptions(
                      staticSelectOptions.map((current, optionIndex) =>
                        optionIndex === index ? { ...current, value: event.target.value } : current,
                      ),
                    )
                  }
                />
                <button
                  aria-label={translate('::App.DeveloperKitComponentDesigner.OptionDeleteAria', {
                    index: index + 1,
                  })}
                  className="rounded px-2 text-slate-400 hover:bg-red-50 hover:text-red-600 dark:hover:bg-red-950"
                  type="button"
                  onClick={() =>
                    updateStaticSelectOptions(
                      staticSelectOptions.filter((_, optionIndex) => optionIndex !== index),
                    )
                  }
                >
                  <FaTrash />
                </button>
              </div>
            ))}
            <button
              className="flex w-full items-center justify-center gap-1 rounded border border-dashed border-slate-300 px-2 py-1.5 text-[10px] font-semibold text-sky-600 hover:border-sky-400 dark:border-slate-700"
              type="button"
              onClick={() =>
                updateStaticSelectOptions([
                  ...staticSelectOptions,
                  {
                    label: translate('::App.DeveloperKitComponentDesigner.OptionN', {
                      index: staticSelectOptions.length + 1,
                    }),
                    value: String(staticSelectOptions.length + 1),
                  },
                ])
              }
            >
              <FaPlus /> {translate('::App.DeveloperKitComponentDesigner.AddStaticOption')}
            </button>
          </div>
        ) : (
          <div className="space-y-2">
            <div className="text-[10px] font-semibold uppercase tracking-wider text-slate-400">
              {translate('::App.DeveloperKitComponentDesigner.LabelValueMapping')}
            </div>
            <p className="text-[10px] leading-4 text-slate-500">
              {translate('::App.DeveloperKitComponentDesigner.LabelValueMappingHint')}
            </p>
            {activeDataSample !== undefined && selectOptionsBinding?.sourceId && (
              <>
                <label className="block">
                  <span className="mb-1 block text-[10px] font-semibold text-slate-500">
                    Koleksiyon
                  </span>
                  <select
                    className="w-full rounded-md border border-slate-300 bg-white px-2 py-2 text-[10px] dark:border-slate-700 dark:bg-slate-900"
                    value={selectOptionsBinding.path}
                    onChange={(event) =>
                      updateSelectedBindingDetails(optionDataProperty, {
                        path: event.target.value,
                        labelPath: '',
                        valuePath: '',
                      })
                    }
                  >
                    {!selectCollectionPaths.length && (
                      <option value="">
                        {translate('::App.DeveloperKitComponentDesigner.NoCollectionFound')}
                      </option>
                    )}
                    {selectCollectionPaths.map((path) => (
                      <option key={path || '__root__'} value={path}>
                        {path ||
                          translate('::App.DeveloperKitComponentDesigner.WholeResponseArray')}
                      </option>
                    ))}
                  </select>
                </label>
                {selectCollectionSample && (
                  <div className="grid grid-cols-2 gap-2">
                    {(
                      [
                        ['labelPath', 'App.DeveloperKitComponentDesigner.LabelColumn'],
                        ['valuePath', 'App.DeveloperKitComponentDesigner.ValueColumn'],
                      ] as const
                    ).map(([key, label]) => (
                      <label key={key} className="block">
                        <span className="mb-1 block text-[10px] font-semibold text-slate-500">
                          {translate('::' + label)}
                        </span>
                        <select
                          className="w-full rounded-md border border-slate-300 bg-white px-2 py-2 text-[10px] dark:border-slate-700 dark:bg-slate-900"
                          value={selectOptionsBinding[key] || ''}
                          onChange={(event) =>
                            updateSelectedBindingDetails(optionDataProperty, {
                              [key]: event.target.value,
                            })
                          }
                        >
                          <option value="">
                            {translate(
                              selectColumnFields.length
                                ? '::App.DeveloperKitComponentDesigner.SelectColumn'
                                : '::App.DeveloperKitComponentDesigner.ItemItself',
                            )}
                          </option>
                          {selectColumnFields.map((field) => (
                            <option key={field.path} value={field.path}>
                              {field.path}
                            </option>
                          ))}
                        </select>
                      </label>
                    ))}
                  </div>
                )}
                {/*
                  Label ve Value ekranı sürer; buradaki sütunlar görünmez ama
                  seçenek nesnesiyle birlikte taşınır, böylece bir script onları
                  başka bir komponente ya da SqlDataSource kaydına yazabilir.
                */}
                {selectCollectionSample && selectColumnFields.length > 0 && (
                  <div>
                    <span className="mb-1 flex items-center justify-between text-[10px] font-semibold text-slate-500">
                      {translate('::App.DeveloperKitComponentDesigner.ExtraColumns')}
                      <code className="font-normal normal-case text-sky-600">
                        refs.{selectedNode?.ref}.getColumn(&apos;…&apos;)
                      </code>
                    </span>
                    <div className="flex flex-wrap items-center gap-1">
                      {selectOptionColumns.map((column) => (
                        <span
                          key={column}
                          className="flex items-center gap-1 rounded-full bg-sky-100 px-2 py-[2px] text-[10px] text-sky-700 dark:bg-sky-950 dark:text-sky-200"
                        >
                          {column}
                          <button
                            className="text-sky-400 hover:text-red-500"
                            title={translate('::App.DeveloperKitComponentDesigner.RemoveColumn')}
                            type="button"
                            onClick={() =>
                              updateSelectedBindingDetails(optionDataProperty, {
                                columns: selectOptionColumns.filter((item) => item !== column),
                              })
                            }
                          >
                            <FaTimes size={8} />
                          </button>
                        </span>
                      ))}
                      <select
                        className="rounded-md border border-slate-300 bg-white px-2 py-1 text-[10px] dark:border-slate-700 dark:bg-slate-900"
                        value=""
                        onChange={(event) => {
                          const next = event.target.value
                          if (!next || selectOptionColumns.includes(next)) return
                          updateSelectedBindingDetails(optionDataProperty, {
                            columns: [...selectOptionColumns, next],
                          })
                        }}
                      >
                        <option value="">
                          {translate('::App.DeveloperKitComponentDesigner.AddColumn')}
                        </option>
                        {selectColumnFields
                          .filter((field) => !selectOptionColumns.includes(field.path))
                          .map((field) => (
                            <option key={field.path} value={field.path}>
                              {field.path}
                            </option>
                          ))}
                      </select>
                    </div>
                    <p className="mt-1 text-[10px] leading-4 text-slate-500">
                      {translate('::App.DeveloperKitComponentDesigner.ExtraColumnsHint')}{' '}
                      <code>
                        refs.{selectedNode?.ref || 'select1'}.getColumn(&apos;sutun&apos;)
                      </code>{' '}
                      {translate('::App.DeveloperKitComponentDesigner.ExtraColumnsHintSuffix')}
                    </p>
                  </div>
                )}
                {selectCollectionSample &&
                  selectColumnFields.length > 0 &&
                  (!selectOptionsBinding.labelPath || !selectOptionsBinding.valuePath) && (
                    <p className="rounded bg-amber-50 p-2 text-[10px] text-amber-700 dark:bg-amber-950 dark:text-amber-200">
                      {translate('::App.DeveloperKitComponentDesigner.SelectLabelValueWarning', {
                        type: selectedNode?.type ?? '',
                      })}
                    </p>
                  )}
              </>
            )}
            {activeDataSample === undefined && (
              <p className="rounded bg-slate-50 p-2 text-[10px] leading-4 text-slate-500 dark:bg-slate-950">
                {translate('::App.DeveloperKitComponentDesigner.SelectEndpointFirst')}
              </p>
            )}
          </div>
        )}
      </div>
    )
  }

  const renderTabularDataConfiguration = () => {
    if (!selectedId || !isTabularDataComponent(selectedNode?.type) || selectDataMode !== 'static')
      return null
    const currentItems = Array.isArray(selectedNode?.props.items) ? selectedNode.props.items : []
    const draft = staticCollectionDrafts[selectedId] ?? JSON.stringify(currentItems, null, 2)
    const error = staticCollectionErrors[selectedId]
    return (
      <div className="rounded-lg border border-slate-200 p-3 dark:border-slate-800">
        <div className="mb-2 text-[10px] font-semibold uppercase tracking-wider text-slate-400">
          {translate('::App.DeveloperKitComponentDesigner.StaticRowsJson')}
        </div>
        <p className="mb-2 text-[10px] leading-4 text-slate-500">
          {translate('::App.DeveloperKitComponentDesigner.StaticRowsHint')}
        </p>
        <textarea
          className="min-h-40 w-full rounded-md border border-slate-300 bg-white p-2 font-mono text-[10px] leading-4 dark:border-slate-700 dark:bg-slate-900"
          spellCheck={false}
          value={draft}
          onChange={(event) => updateStaticCollection(event.target.value)}
        />
        {error && (
          <p className="mt-2 rounded bg-red-50 p-2 text-[10px] text-red-600 dark:bg-red-950">
            {error}
          </p>
        )}
        {!error && (
          <p className="mt-2 text-[10px] text-emerald-600">
            {translate('::App.DeveloperKitComponentDesigner.RowsReady', {
              count: currentItems.length,
            })}
          </p>
        )}
      </div>
    )
  }

  const renderTabularColumnConfiguration = () => {
    if (!isTabularDataComponent(selectedNode?.type)) return null
    return (
      <div className="rounded-lg border border-slate-200 p-3 dark:border-slate-800">
        <div className="mb-2 flex items-center justify-between">
          <span className="text-[10px] font-semibold uppercase tracking-wider text-slate-400">
            {translate('::App.DeveloperKitComponentDesigner.VisibleColumns')}
          </span>
          <button
            className="text-[9px] font-semibold text-sky-600"
            type="button"
            onClick={toggleAllGridColumns}
          >
            {translate(
              allGridColumnsSelected ? '::App.Platform.RemoveAll' : '::App.Platform.SelectAll',
            )}
          </button>
        </div>
        {gridColumnFields.length ? (
          <div className="max-h-44 space-y-1 overflow-y-auto">
            {gridColumnFields.map((field) => (
              <label
                key={field.path}
                className="flex cursor-pointer items-center gap-2 rounded bg-slate-50 px-2 py-1.5 dark:bg-slate-950"
              >
                <input
                  checked={selectedGridColumns.includes(field.path)}
                  className="h-3 w-3 accent-sky-600"
                  type="checkbox"
                  onChange={() => toggleGridColumn(field.path)}
                />
                <code className="min-w-0 flex-1 truncate text-[10px] text-sky-700 dark:text-sky-300">
                  {field.path}
                </code>
                <span className="text-[9px] text-slate-400">{field.type}</span>
              </label>
            ))}
          </div>
        ) : (
          <p className="rounded bg-slate-50 p-2 text-[10px] leading-4 text-slate-500 dark:bg-slate-950">
            {translate('::App.DeveloperKitComponentDesigner.AddObjectForColumns')}
          </p>
        )}
      </div>
    )
  }

  /**
   * SqlDataSource command panel: the ASP.NET style Select/Insert/Update/Delete
   * slots. Each slot only accepts a data source declared with the matching HTTP
   * method, which is what enables the Save/Delete buttons at runtime.
   */
  const renderSqlDataSourceConfiguration = () => {
    if (!selectedNode || !selectedIsSqlDataSource) return null
    const selectSourceId = String(selectedNode.props.selectEndpoint || '')
    const selectSample = selectSourceId ? dataSourceSamples[selectSourceId] : undefined
    const collectionPaths = selectSample
      ? [
          '',
          ...discoverDataFields(selectSample)
            .filter((field) => field.type === 'array')
            .map((field) => field.path),
        ]
      : ['']
    const record = sqlDataSourceRecords[selectedNode.id]
    const recordFields = record === undefined ? [] : discoverDataFields(record)
    const selectSource = document.dataSources.find((source) => source.id === selectSourceId)
    // A GetById URL cannot be sampled at design time without a stand-in key.
    const selectNeedsPreviewKey = Boolean(
      selectSource && hasSqlDataSourceUrlParams(selectSource.url),
    )

    return (
      <div className="space-y-3">
        <div className="rounded-lg border border-sky-200 bg-sky-50 p-3 text-[10px] leading-4 text-sky-900 dark:border-sky-900 dark:bg-sky-950 dark:text-sky-200">
          {translate('::App.DeveloperKitComponentDesigner.CommandSlotsHint')}
        </div>
        {SQL_DATA_SOURCE_SLOTS.map((slot) => {
          const options =
            slot.method === 'GET'
              ? selectSlotDataSources
              : document.dataSources.filter((source) => source.method === slot.method)
          const currentValue = String(selectedNode.props[slot.property] || '')
          return (
            <label
              key={slot.property}
              className="block rounded-lg border border-slate-200 p-3 dark:border-slate-800"
            >
              <span className="mb-1 flex items-center justify-between text-[10px] font-semibold uppercase tracking-wider text-slate-400">
                <span>{slot.label}</span>
                {currentValue && (
                  <span className="text-emerald-600">
                    {translate('::App.DeveloperKitComponentDesigner.Bound')}
                  </span>
                )}
              </span>
              <p className="mb-2 text-[10px] leading-4 text-slate-500">
                {translate('::' + slot.description)}
              </p>
              <select
                className="w-full rounded-md border border-slate-300 bg-white px-2 py-2 text-[10px] dark:border-slate-700 dark:bg-slate-900"
                value={currentValue}
                onChange={(event) => {
                  const sourceId = event.target.value
                  updateSelectedProp(slot.property, sourceId)
                  const source = document.dataSources.find((item) => item.id === sourceId)
                  if (
                    slot.method === 'GET' &&
                    source &&
                    dataSourceSamples[sourceId] === undefined
                  ) {
                    void testDataSource(source)
                  }
                }}
              >
                <option value="">
                  {translate('::App.DeveloperKitComponentDesigner.NotDefined')}
                </option>
                {options.map((source) => (
                  <option key={source.id} value={source.id}>
                    {source.name} · {source.url}
                  </option>
                ))}
              </select>
              {!options.length && (
                <p className="mt-1.5 text-[10px] leading-4 text-amber-600">
                  {translate('::App.DeveloperKitComponentDesigner.NoEndpointForMethod', {
                    method: slot.method,
                  })}
                </p>
              )}
            </label>
          )
        })}
        <div className="grid grid-cols-2 gap-2">
          <label className="block">
            <span className="mb-1 block text-[10px] font-semibold uppercase tracking-wider text-slate-400">
              Key field
            </span>
            <input
              className="w-full rounded-md border border-slate-300 bg-white px-2 py-2 text-[10px] dark:border-slate-700 dark:bg-slate-900"
              placeholder="id"
              value={String(selectedNode.props.keyFieldName ?? '')}
              onChange={(event) => updateSelectedProp('keyFieldName', event.target.value)}
            />
          </label>
          <label className="block">
            <span className="mb-1 block text-[10px] font-semibold uppercase tracking-wider text-slate-400">
              Koleksiyon
            </span>
            <select
              className="w-full rounded-md border border-slate-300 bg-white px-2 py-2 text-[10px] dark:border-slate-700 dark:bg-slate-900"
              value={String(selectedNode.props.collectionPath ?? '')}
              onChange={(event) => updateSelectedProp('collectionPath', event.target.value)}
            >
              {collectionPaths.map((path) => (
                <option key={path || '__root__'} value={path}>
                  {path || translate('::App.DeveloperKitComponentDesigner.ResponseItself')}
                </option>
              ))}
            </select>
          </label>
        </div>
        <div className="rounded-lg border border-slate-200 p-3 dark:border-slate-800">
          <div className="mb-1 text-[10px] font-semibold uppercase tracking-wider text-slate-400">
            Select key parametresi
          </div>
          <p className="mb-2 text-[10px] leading-4 text-slate-500">
            {translate('::App.DeveloperKitComponentDesigner.KeyParamHint')}
          </p>
          <select
            className="mb-2 w-full rounded-md border border-slate-300 bg-white px-2 py-2 text-[10px] dark:border-slate-700 dark:bg-slate-900"
            value={getSqlDataSourceKeySource(selectedNode)}
            onChange={(event) => updateSelectedProp('keySource', event.target.value)}
          >
            {SQL_DATA_SOURCE_KEY_SOURCES.map((item) => (
              <option key={item.value} value={item.value}>
                {item.label}
              </option>
            ))}
          </select>
          <input
            className="w-full rounded-md border border-slate-300 bg-white px-2 py-2 text-[10px] dark:border-slate-700 dark:bg-slate-900"
            placeholder={translate('::App.DeveloperKitComponentDesigner.KeyParamPlaceholder', {
              field: getSqlDataSourceKeyField(selectedNode),
            })}
            value={String(selectedNode.props.keyParamName ?? '')}
            onChange={(event) => updateSelectedProp('keyParamName', event.target.value)}
          />
        </div>
        {selectNeedsPreviewKey && (
          <div className="rounded-lg border border-slate-200 p-3 dark:border-slate-800">
            <div className="mb-1 text-[10px] font-semibold uppercase tracking-wider text-slate-400">
              {translate('::App.DeveloperKitComponentDesigner.PreviewKeyValue')}
            </div>
            <p className="mb-2 text-[10px] leading-4 text-slate-500">
              {translate('::App.DeveloperKitComponentDesigner.PreviewKeyValueHint')}
            </p>
            <input
              className="w-full rounded-md border border-slate-300 bg-white px-2 py-2 text-[10px] dark:border-slate-700 dark:bg-slate-900"
              placeholder={translate(
                '::App.DeveloperKitComponentDesigner.PreviewKeyValuePlaceholder',
              )}
              value={String(selectedNode.props.previewKeyValue ?? '')}
              onChange={(event) => updateSelectedProp('previewKeyValue', event.target.value)}
            />
          </div>
        )}
        <div className="space-y-1.5 rounded-lg border border-slate-200 p-3 dark:border-slate-800">
          {(
            [
              ['autoLoad', 'App.DeveloperKitComponentDesigner.AutoLoad', true],
              ['showToolbar', 'App.DeveloperKitComponentDesigner.ShowToolbar', true],
            ] as const
          ).map(([property, label, defaultChecked]) => (
            <label key={property} className="flex cursor-pointer items-center gap-2 text-[10px]">
              <input
                checked={
                  defaultChecked
                    ? selectedNode.props[property] !== false
                    : selectedNode.props[property] === true
                }
                className="h-3 w-3 accent-sky-600"
                type="checkbox"
                onChange={(event) => updateSelectedProp(property, event.target.checked)}
              />
              {translate('::' + label)}
            </label>
          ))}
        </div>
        <div className="rounded-lg border border-slate-200 p-3 dark:border-slate-800">
          <div className="mb-2 text-[10px] font-semibold uppercase tracking-wider text-slate-400">
            {translate('::App.DeveloperKitComponentDesigner.RecordColumns')}
          </div>
          {recordFields.length ? (
            <div className="max-h-40 space-y-1 overflow-y-auto">
              {recordFields.map((field) => (
                <div
                  key={field.path}
                  className="flex items-center justify-between gap-2 rounded bg-slate-50 px-2 py-1.5 dark:bg-slate-950"
                  title={field.preview}
                >
                  <code className="min-w-0 flex-1 truncate text-[10px] text-sky-700 dark:text-sky-300">
                    {field.path}
                  </code>
                  <span className="text-[9px] text-slate-400">{field.type}</span>
                </div>
              ))}
            </div>
          ) : (
            <p className="text-[10px] leading-4 text-slate-500">
              {translate('::App.DeveloperKitComponentDesigner.RunSelectToListColumns')}
            </p>
          )}
        </div>
      </div>
    )
  }

  /**
   * Banner shown for anything inside a SqlDataSource: it states which record the
   * component is bound to and, when the container has no Select endpoint yet,
   * why no column can be picked.
   */
  const renderSqlScopeNotice = () => {
    if (!sqlScopeNode) return null
    const hasSelect = Boolean(getSqlDataSourceEndpointId(sqlScopeNode, 'selectEndpoint'))
    const record = sqlDataSourceRecords[sqlScopeNode.id]
    const hasColumns = record !== undefined && discoverDataFields(record).length > 0

    if (!hasSelect) {
      return (
        <div className="rounded-lg border border-amber-300 bg-amber-50 p-3 text-[10px] leading-4 text-amber-800 dark:border-amber-800 dark:bg-amber-950 dark:text-amber-200">
          {translate('::App.DeveloperKitComponentDesigner.DefineSelectEndpointFirst')}
        </div>
      )
    }
    return (
      <div className="rounded-lg border border-sky-200 bg-sky-50 p-3 text-[10px] leading-4 text-sky-900 dark:border-sky-900 dark:bg-sky-950 dark:text-sky-200">
        {translate('::App.DeveloperKitComponentDesigner.BoundToSqlDataSource')}
        {!hasColumns && ` ${translate('::App.DeveloperKitComponentDesigner.RunSelectOnce')}`}
      </div>
    )
  }

  /**
   * Every column the record can offer, including the ones a sampled row cannot
   * reveal: an object column (`extraProperties`) has no leaf to discover, and a
   * column added after the last Select run is not in the sample at all. Both stay
   * typeable, so a field is never blocked by a stale or empty sample.
   */
  const sqlRecordColumns = useMemo(() => {
    const record = sqlScopeNode ? sqlDataSourceRecords[sqlScopeNode.id] : undefined
    if (!record || typeof record !== 'object') return []
    const columns = new Map<string, string>()
    Object.entries(record as Record<string, unknown>).forEach(([path, value]) =>
      columns.set(path, getDataValueType(value)),
    )
    discoverDataFields(record)
      .filter((field) => field.type !== 'array')
      .forEach((field) => columns.set(field.path, field.type))
    return [...columns.entries()]
      .map(([path, type]) => ({ path, type }))
      .sort((left, right) => left.path.localeCompare(right.path))
  }, [sqlDataSourceRecords, sqlScopeNode])

  /**
   * The prop a SqlDataSource reads from and writes back to. An already bound node
   * keeps its prop; an unbound one is offered the prop it actually carries, which
   * is `checked` for the toggles and `value` for every other editor.
   */
  const sqlRecordProperty = useMemo<SqlFormValueProperty | undefined>(() => {
    if (!sqlScopeNode || !selectedNode) return undefined
    const names = new Set((selectedDefinition?.properties || []).map((property) => property.name))
    return getSqlRecordProperty(selectedNode, sqlScopeNode.id, names)
  }, [selectedDefinition, selectedNode, sqlScopeNode])

  /**
   * Record column and its new-record default, for anything editable dropped into
   * a SqlDataSource. The column is a free text field backed by a datalist rather
   * than a dropdown: the sampled row is a convenience, not the list of columns
   * that exist.
   */
  const renderSqlRecordField = () => {
    if (!sqlScopeNode || !selectedNode || !sqlRecordProperty) return null
    const binding = selectedNode.bindings?.[sqlRecordProperty]
    const column = binding?.sourceId === sqlScopeNode.id ? binding.path : ''
    const rawDefault = selectedNode.props?.[SQL_DEFAULT_VALUE_PROP]
    const currentDefault = rawDefault === undefined || rawDefault === null ? '' : String(rawDefault)
    const columnListId = `sql-columns-${sqlScopeNode.id}`
    // A picker gets a real date editor, unless it holds a token — `@today` is not
    // a date the browser can render, and typing it needs a plain text field.
    const isDateDefault = isDesignerDateComponent(selectedNode.type) && !currentDefault.startsWith('@')
    const defaultInputType = isDateDefault
      ? isDesignerDateOnlyComponent(selectedNode.type)
        ? 'date'
        : 'datetime-local'
      : selectedNode.props?.type === 'number'
        ? 'number'
        : 'text'

    return (
      <div className="space-y-3 rounded-lg border border-slate-200 p-3 dark:border-slate-800">
        <div>
          <div className="mb-1 text-[10px] font-semibold uppercase tracking-wider text-slate-400">
            {translate('::App.DeveloperKitComponentDesigner.RecordField')} · {sqlRecordProperty}
          </div>
          <p className="mb-2 text-[10px] leading-4 text-slate-500">
            {translate('::App.DeveloperKitComponentDesigner.RecordFieldHint')}
          </p>
          <input
            className="w-full rounded-md border border-slate-300 bg-white px-2 py-2 text-[10px] dark:border-slate-700 dark:bg-slate-900"
            list={columnListId}
            placeholder={translate('::App.DeveloperKitComponentDesigner.DoNotBindToRecord')}
            value={column}
            onChange={(event) => {
              const path = event.target.value.trim()
              updateSelectedBinding(sqlRecordProperty, path ? sqlScopeNode.id : '', path)
            }}
          />
          <datalist id={columnListId}>
            {sqlRecordColumns.map((column) => (
              <option key={column.path} label={column.type} value={column.path} />
            ))}
          </datalist>
          {!sqlRecordColumns.length && (
            <p className="mt-1.5 text-[10px] leading-4 text-amber-600">
              {translate('::App.DeveloperKitComponentDesigner.DefineAndRunSelect')}
            </p>
          )}
        </div>
        <div>
          <div className="mb-1 text-[10px] font-semibold uppercase tracking-wider text-slate-400">
            {translate('::App.DeveloperKitComponentDesigner.DefaultValue')}
          </div>
          <p className="mb-2 text-[10px] leading-4 text-slate-500">
            {translate('::App.DeveloperKitComponentDesigner.DefaultValueHint', {
              column: column || '—',
            })}
          </p>
          {sqlRecordProperty === 'checked' ? (
            <select
              className="w-full rounded-md border border-slate-300 bg-white px-2 py-2 text-[10px] disabled:opacity-50 dark:border-slate-700 dark:bg-slate-900"
              disabled={!column}
              value={currentDefault}
              onChange={(event) => updateSelectedProp(SQL_DEFAULT_VALUE_PROP, event.target.value)}
            >
              <option value="">
                {translate('::App.DeveloperKitComponentDesigner.NoDefaultValue')}
              </option>
              <option value="true">{translate('::App.Platform.Yes')}</option>
              <option value="false">{translate('::App.Platform.No')}</option>
            </select>
          ) : (
            <input
              className="w-full rounded-md border border-slate-300 bg-white px-2 py-2 text-[10px] disabled:opacity-50 dark:border-slate-700 dark:bg-slate-900"
              disabled={!column}
              placeholder={translate('::App.DeveloperKitComponentDesigner.NoDefaultValue')}
              type={defaultInputType}
              value={
                defaultInputType === 'datetime-local' ? currentDefault.slice(0, 16) : currentDefault
              }
              onChange={(event) => updateSelectedProp(SQL_DEFAULT_VALUE_PROP, event.target.value)}
            />
          )}
          <div className="mt-1.5 flex flex-wrap gap-1">
            {SQL_DEFAULT_VALUE_TOKENS.map((token) => (
              <button
                key={token}
                className="rounded border border-slate-300 px-1.5 py-0.5 font-mono text-[9px] text-slate-600 hover:border-sky-400 hover:text-sky-700 disabled:opacity-40 dark:border-slate-700 dark:text-slate-300"
                disabled={!column || sqlRecordProperty === 'checked'}
                type="button"
                onClick={() => updateSelectedProp(SQL_DEFAULT_VALUE_PROP, `@${token}`)}
              >
                @{token}
              </button>
            ))}
          </div>
        </div>
      </div>
    )
  }

  const renderDataInspector = () => {
    if (selectedNode?.kind === 'platform') {
      return (
        <div className="rounded-lg border border-sky-200 bg-sky-50 p-3 text-xs leading-5 text-sky-800 dark:border-sky-900 dark:bg-sky-950 dark:text-sky-200">
          <strong className="block">
            {translate('::App.DeveloperKitComponentDesigner.PlatformDataModel')}
          </strong>
          {translate('::App.DeveloperKitComponentDesigner.PlatformDataModelHint', {
            type: selectedNode.type,
          })}
        </div>
      )
    }
    if (selectedIsSqlDataSource) return renderSqlDataSourceConfiguration()
    const scopeNotice = renderSqlScopeNotice()
    const selectModeSelector = renderSelectDataModeSelector()
    const selectConfiguration = renderSelectDataConfiguration()
    if (selectedIsCollectionComponent && selectDataMode === 'static') {
      return (
        <div className="space-y-3">
          {scopeNotice}
          {selectModeSelector}
          {isOptionDataComponent(selectedNode?.type) && selectConfiguration}
          {isTabularDataComponent(selectedNode?.type) && renderTabularDataConfiguration()}
          {isTabularDataComponent(selectedNode?.type) && renderTabularColumnConfiguration()}
          {renderSqlRecordField()}
        </div>
      )
    }

    if (!inspectorDataSources.length) {
      return (
        <div className="space-y-3">
          {scopeNotice}
          {selectModeSelector}
          <div className="rounded-lg border border-dashed border-slate-300 p-3 text-xs leading-5 text-slate-500 dark:border-slate-700">
            {translate('::App.DeveloperKitComponentDesigner.NoSelectableGetEndpoint')}
          </div>
          {renderSqlRecordField()}
        </div>
      )
    }

    return (
      <div className="space-y-3">
        {scopeNotice}
        {selectModeSelector}
        {/* Inside a SqlDataSource a record field has exactly one legal source, so
            the picker is replaced by a read-only statement of that source. */}
        <div className="rounded-lg border border-slate-200 p-3 dark:border-slate-800">
          <label className="block">
            <span className="mb-1.5 block text-[10px] font-semibold uppercase tracking-wider text-slate-400">
              {sqlScopeLocked
                ? translate('::App.Platform.DataSource')
                : isOptionDataComponent(selectedNode?.type)
                  ? '1. Endpoint'
                  : 'Endpoint'}
            </span>
            {sqlScopeLocked ? (
              <div className="rounded-md border border-slate-200 bg-slate-50 px-2.5 py-2 text-xs text-slate-600 dark:border-slate-700 dark:bg-slate-950 dark:text-slate-300">
                {sqlScopeSource?.name}
              </div>
            ) : (
              <select
                className="w-full rounded-md border border-slate-300 bg-white px-2.5 py-2 text-xs dark:border-slate-700 dark:bg-slate-900"
                value={activeDataSource?.id || ''}
                onChange={(event) => {
                  const sourceId = event.target.value
                  setDataPanelSourceId(sourceId)
                  if (
                    (isOptionDataComponent(selectedNode?.type) ||
                      isTabularDataComponent(selectedNode?.type)) &&
                    selectDataMode === 'endpoint'
                  ) {
                    if (selectedId && isTabularDataComponent(selectedNode?.type)) {
                      commitDocument((current) => ({
                        ...current,
                        nodes: updateNodeTree(current.nodes, selectedId, (node) => {
                          const props = { ...node.props }
                          delete props.dataColumns
                          return {
                            ...node,
                            props,
                            bindings: {
                              ...node.bindings,
                              items: { sourceId, path: '' },
                            },
                          }
                        }),
                      }))
                    } else {
                      updateSelectedBinding(optionDataProperty, sourceId, '')
                    }
                  }
                  const source = document.dataSources.find((item) => item.id === sourceId)
                  if (source && dataSourceSamples[sourceId] === undefined) {
                    void testDataSource(source)
                  }
                }}
              >
                {/* Without this a browser paints the first option while the
                    value is still empty, which reads as a made choice. */}
                {!activeDataSource && (
                  <option value="">
                    {translate('::App.DeveloperKitComponentDesigner.SelectEndpoint')}
                  </option>
                )}
                {inspectorDataSources.map((source) => (
                  <option key={source.id} value={source.id}>
                    {source.name}
                  </option>
                ))}
              </select>
            )}
          </label>
        </div>

        {isOptionDataComponent(selectedNode?.type) && selectConfiguration}

        {isTabularDataComponent(selectedNode?.type) &&
          activeDataSample !== undefined &&
          tabularItemsBinding?.sourceId && (
            <div className="rounded-lg border border-slate-200 p-3 dark:border-slate-800">
              <label className="block">
                <span className="mb-1 block text-[10px] font-semibold uppercase tracking-wider text-slate-400">
                  Koleksiyon
                </span>
                <select
                  className="w-full rounded-md border border-slate-300 bg-white px-2 py-2 text-[10px] dark:border-slate-700 dark:bg-slate-900"
                  value={tabularItemsBinding.path}
                  onChange={(event) =>
                    updateSelectedBindingDetails('items', { path: event.target.value })
                  }
                >
                  {!tabularCollectionPaths.length && (
                    <option value="">
                      {translate('::App.DeveloperKitComponentDesigner.NoCollectionFound')}
                    </option>
                  )}
                  {tabularCollectionPaths.map((path) => (
                    <option key={path || '__root__'} value={path}>
                      {path || translate('::App.DeveloperKitComponentDesigner.WholeResponseArray')}
                    </option>
                  ))}
                </select>
              </label>
            </div>
          )}

        {!isOptionDataComponent(selectedNode?.type) && activeBindingSample !== undefined && (
          <div className="rounded-lg border border-slate-200 p-3 dark:border-slate-800">
            <div className="mb-2 flex items-center justify-between">
              <span className="text-[10px] font-semibold uppercase tracking-wider text-slate-400">
                {translate('::App.DeveloperKitComponentDesigner.AvailableFields')}
              </span>
              <div className="flex items-center gap-2">
                {isTabularDataComponent(selectedNode?.type) && gridColumnFields.length > 0 && (
                  <label className="flex cursor-pointer items-center gap-1 text-[9px] font-semibold text-sky-600">
                    <input
                      checked={allGridColumnsSelected}
                      className="h-3 w-3 accent-sky-600"
                      type="checkbox"
                      onChange={toggleAllGridColumns}
                    />
                    {translate(
                      allGridColumnsSelected
                        ? '::App.Platform.RemoveAll'
                        : '::App.Platform.SelectAll',
                    )}
                  </label>
                )}
                <span className="rounded bg-emerald-100 px-1.5 py-0.5 text-[9px] text-emerald-700">
                  {isTabularDataComponent(selectedNode?.type)
                    ? `${selectedGridColumns.length}/${gridColumnFields.length}`
                    : `${activeDataFields.length} alan`}
                </span>
              </div>
            </div>
            {Array.isArray(activeBindingSample) && (
              <div className="mb-2 rounded bg-indigo-50 px-2 py-1.5 text-[10px] text-indigo-700 dark:bg-indigo-950 dark:text-indigo-200">
                {translate(
                  isActiveRepeatedSource
                    ? '::App.DeveloperKitComponentDesigner.GridRows'
                    : '::App.DeveloperKitComponentDesigner.Collection',
                )}{' '}
                ·{' '}
                {translate('::App.Platform.RecordCount', {
                  count: activeBindingSample.length,
                })}
              </div>
            )}
            <div className="max-h-44 space-y-1 overflow-y-auto">
              {activeDataFields.length ? (
                activeDataFields.map((field) => (
                  <label
                    key={field.path}
                    className="grid cursor-pointer grid-cols-[auto_1fr_auto] gap-2 rounded bg-slate-50 px-2 py-1.5 dark:bg-slate-950"
                    title={field.preview}
                  >
                    {isTabularDataComponent(selectedNode?.type) &&
                    !['array', 'object'].includes(field.type) ? (
                      <input
                        checked={selectedGridColumns.includes(field.path)}
                        className="mt-0.5 h-3 w-3 accent-sky-600"
                        type="checkbox"
                        onChange={() => toggleGridColumn(field.path)}
                      />
                    ) : (
                      <span />
                    )}
                    <code className="truncate text-[10px] text-sky-700 dark:text-sky-300">
                      {field.path}
                    </code>
                    <span className="text-[9px] text-slate-400">{field.type}</span>
                    <span className="col-span-2 col-start-2 truncate text-[9px] text-slate-400">
                      {field.preview}
                    </span>
                  </label>
                ))
              ) : (
                <p className="text-[10px] text-slate-400">
                  {translate('::App.DeveloperKitComponentDesigner.NoColumnInResponse')}
                </p>
              )}
            </div>
          </div>
        )}

        {!isOptionDataComponent(selectedNode?.type) &&
          !isTabularDataComponent(selectedNode?.type) && (
            <div>
              <div className="mb-2 text-[10px] font-semibold uppercase tracking-wider text-slate-400">
                {translate('::App.DeveloperKitComponentDesigner.PropertyBindings')}
              </div>
              {!orderedBindableProperties.length ? (
                <p className="rounded-lg border border-dashed border-slate-300 p-3 text-xs leading-5 text-slate-500 dark:border-slate-700">
                  {translate('::App.DeveloperKitComponentDesigner.NoBindableProperty')}
                </p>
              ) : (
                orderedBindableProperties.map((property) => {
                  const choice = getBindingChoice(property.name)
                  const collection = isCollectionProperty(property.name, property.type)
                  const selectableFields = collection
                    ? activeDataFields.filter((field) => field.type === 'array')
                    : activeDataFields
                  const currentBinding = selectedNode?.bindings?.[property.name]
                  const currentBindingSource = document.dataSources.find(
                    (source) => source.id === currentBinding?.sourceId,
                  )
                  // A binding saved before the SqlDataSource lock existed can still
                  // point at an unrelated endpoint; the dropdown cannot show it, so
                  // it is called out explicitly instead of failing silently.
                  const foreignBinding =
                    sqlScopeLocked &&
                    Boolean(currentBinding?.sourceId) &&
                    currentBinding?.sourceId !== sqlScopeSource?.id
                  const knownChoice =
                    choice === '' ||
                    choice === '__root__' ||
                    selectableFields.some((field) => field.path === choice)

                  return (
                    <label
                      key={property.name}
                      className="mb-2 block rounded-lg border border-slate-200 p-2 dark:border-slate-800"
                    >
                      <span className="mb-1.5 flex items-center justify-between text-[11px] font-medium text-slate-600 dark:text-slate-300">
                        <span>{property.name}</span>
                        <span className="text-[9px] font-normal text-slate-400">
                          {property.tsType || property.type}
                        </span>
                      </span>
                      <select
                        className="w-full rounded-md border border-slate-300 bg-white px-2 py-2 text-[10px] dark:border-slate-700 dark:bg-slate-900"
                        value={choice}
                        onChange={(event) => {
                          const nextChoice = event.target.value
                          if (!nextChoice) {
                            updateSelectedBinding(property.name, '')
                            return
                          }
                          if (!activeDataSource) return
                          updateSelectedBinding(
                            property.name,
                            activeDataSource.id,
                            getBindingPath(nextChoice, collection),
                          )
                        }}
                      >
                        <option value="">
                          {translate('::App.DeveloperKitComponentDesigner.StaticValueNoBinding')}
                        </option>
                        {activeBindingSample !== undefined &&
                          (collection ||
                            !Array.isArray(activeBindingSample) ||
                            isActiveRepeatedSource) && (
                            <option value="__root__">
                              {translate(
                                isActiveRepeatedSource
                                  ? '::App.DeveloperKitComponentDesigner.CurrentGridRow'
                                  : collection
                                    ? '::App.DeveloperKitComponentDesigner.WholeCollection'
                                    : '::App.DeveloperKitComponentDesigner.WholeResponse',
                              )}
                            </option>
                          )}
                        {!knownChoice && <option value={choice}>{choice} (mevcut path)</option>}
                        {selectableFields.map((field) => (
                          <option key={field.path} value={field.path}>
                            {field.path} · {field.type}
                          </option>
                        ))}
                      </select>
                      {currentBinding?.sourceId && !foreignBinding && (
                        <div className="mt-1.5 truncate font-mono text-[9px] text-emerald-600">
                          {currentBindingSource?.name || currentBinding.sourceId}:{' '}
                          {currentBinding.path || '(root)'}
                        </div>
                      )}
                      {foreignBinding && (
                        <div className="mt-1.5 rounded bg-amber-50 p-1.5 text-[9px] leading-3 text-amber-700 dark:bg-amber-950 dark:text-amber-200">
                          <span className="block truncate font-mono">
                            {currentBindingSource?.name || currentBinding?.sourceId}:{' '}
                            {currentBinding?.path || '(root)'}
                          </span>
                          <button
                            className="mt-1 font-semibold underline"
                            type="button"
                            onClick={() => updateSelectedBinding(property.name, '')}
                          >
                            {translate('::App.DeveloperKitComponentDesigner.ClearNonSqlBinding')}
                          </button>
                        </div>
                      )}
                    </label>
                  )
                })
              )}
            </div>
          )}
        {renderSqlRecordField()}
      </div>
    )
  }

  const renderTree = (nodes: DesignerNode[], depth = 0): React.ReactNode =>
    nodes.map((node) => (
      <React.Fragment key={node.id}>
        <button
          className={`flex w-full items-center gap-2 rounded px-2 py-1.5 text-left text-xs ${selectedId === node.id ? 'bg-sky-100 font-semibold text-sky-700 dark:bg-sky-950 dark:text-sky-300' : 'text-slate-600 hover:bg-slate-100 dark:text-slate-300 dark:hover:bg-slate-800'}`}
          style={{ paddingLeft: 8 + depth * 14 }}
          type="button"
          onClick={() => selectDesignerNode(node.id)}
        >
          <FaLayerGroup className="shrink-0" />
          <span className="truncate">{node.type}</span>
          <span className="ml-auto text-[9px] text-slate-400">{node.id.slice(-4)}</span>
        </button>
        {renderTree(node.children, depth + 1)}
      </React.Fragment>
    ))

  const pageHelmet = <PageTitle title={pageTitle} />

  if (!component) {
    return (
      <div className="flex min-h-[70vh] items-center justify-center text-sm text-slate-500">
        {pageHelmet}
        {componentLoadError || translate('::App.DeveloperKitComponentDesigner.LoadingComponent')}
      </div>
    )
  }

  const canvas = (
    <VisualCanvas
      interactive
      nodes={document.nodes}
      selectedId={selectedId}
      dataValues={previewDataValues}
      renderCustomComponent={(componentName, props) => renderComponent(componentName, props)}
      onSelect={(nodeId) => selectDesignerNode(nodeId || null)}
      onNodePropChange={updateNodeProp}
      onDropComponent={addComponent}
      onDropComponentBeside={addComponentBeside}
      onMoveIntoContainer={moveNodeIntoContainerNode}
      onMove={moveNode}
      onReorder={reorderNode}
      onDuplicate={duplicateNode}
      onDelete={deleteNode}
    />
  )

  const javascriptEventTargets: Array<{ node: DesignerNode; eventNames: string[] }> = []
  walkDesignerNodes(document.nodes, (node) => {
    const definition = catalogByName.get(node.type)
    const primaryEvents = DESIGNER_PRIMARY_EVENTS[node.type]
    const savedEventNames = Object.entries(node.events || {})
      .filter(([, script]) => script.trim())
      .map(([eventName]) => eventName)
    const definitionEventNames = (definition?.properties || [])
      .filter((property) => property.category === 'events' || property.type === 'function')
      .map((property) => property.name)
    const eventNames = Array.from(
      new Set([...(primaryEvents || definitionEventNames), ...savedEventNames]),
    )
    if (eventNames.length) javascriptEventTargets.push({ node, eventNames })
  })
  const activeJavaScriptTarget =
    javascriptEventTargets.find((target) => target.node.id === selectedId) ||
    javascriptEventTargets[0]
  // A Script API example is appended to the editor the user last worked in,
  // falling back to the first event of the selected component.
  const activeEventName = activeJavaScriptTarget?.eventNames.includes(focusedEventName)
    ? focusedEventName
    : activeJavaScriptTarget?.eventNames[0] || ''

  const appendScriptToEvent = (snippet: string) => {
    if (!activeJavaScriptTarget || !activeEventName) return
    const current = activeJavaScriptTarget.node.events[activeEventName] || ''
    updateNodeEvent(
      activeJavaScriptTarget.node.id,
      activeEventName,
      current.trim() ? `${current.replace(/\s+$/, '')}\n\n${snippet}` : snippet,
    )
  }
  /**
   * Builder context of the event being edited: the SqlDataSource that owns the
   * record (the node itself, or the nearest one above it) plus the columns and
   * ref names its rules can address.
   */
  const scriptBuilderNode = scriptBuilderTarget
    ? findDesignerNode(document.nodes, scriptBuilderTarget.nodeId)
    : null
  const scriptBuilderSqlNode = scriptBuilderNode
    ? isSqlDataSourceNode(scriptBuilderNode.type)
      ? scriptBuilderNode
      : [...(findDesignerAncestors(document.nodes, scriptBuilderNode.id) || [])]
          .reverse()
          .find((node) => isSqlDataSourceNode(node.type))
    : undefined
  const scriptBuilderRecordFields = scriptBuilderSqlNode
    ? Object.keys((sqlDataSourceRecords[scriptBuilderSqlNode.id] as Record<string, unknown>) || {})
    : []

  const endpointResultText = endpointResultModal
    ? typeof endpointResultModal.result === 'string'
      ? endpointResultModal.result
      : (JSON.stringify(endpointResultModal.result, null, 2) ?? String(endpointResultModal.result))
    : ''
  const endpointResultCount = endpointResultModal
    ? Array.isArray(endpointResultModal.result)
      ? translate('::App.Platform.RecordCount', {
          count: endpointResultModal.result.length,
        })
      : endpointResultModal.result && typeof endpointResultModal.result === 'object'
        ? `${Object.keys(endpointResultModal.result).length} alan`
        : typeof endpointResultModal.result
    : ''

  return (
    <div className="flex h-[calc(100vh-72px)] min-h-[720px] flex-col overflow-hidden rounded-xl border border-slate-200 bg-slate-100 shadow-sm dark:border-slate-800 dark:bg-slate-950">
      {pageHelmet}
      <header className="flex h-16 shrink-0 items-center justify-between border-b border-slate-200 bg-white px-4 dark:border-slate-800 dark:bg-slate-900">
        <div className="flex min-w-0 items-center gap-3">
          <Link
            className="rounded-md p-2 text-slate-500 hover:bg-slate-100 dark:hover:bg-slate-800"
            title={translate('::App.DeveloperKitComponentEditor.Back')}
            to={ROUTES_ENUM.protected.saas.developerKit.components}
          >
            <FaArrowLeft />
          </Link>
          <div className="flex h-9 w-9 items-center justify-center rounded-lg bg-gradient-to-br from-sky-500 to-indigo-600 text-white">
            <FaMousePointer />
          </div>
          <div className="min-w-0">
            <div className="flex items-center gap-2">
              <h1 className="truncate text-sm font-semibold text-slate-800 dark:text-white">
                {name}
              </h1>
              {isDirty ? (
                <span className="rounded bg-amber-100 px-1.5 py-0.5 text-[10px] text-amber-700">
                  Unsaved
                </span>
              ) : (
                <FaCheckCircle className="text-emerald-500" />
              )}
            </div>
            <p className="truncate text-[11px] text-slate-500">
              Visual Component Designer · {component.routePath}
            </p>
          </div>
        </div>
        <div className="flex items-center gap-1.5">
          <Button
            disabled={!undoStack.current.length}
            icon={<FaUndo />}
            size="xs"
            title={translate('::App.Platform.UndoWithShortcut')}
            variant="plain"
            onClick={undo}
          />
          <Button
            disabled={!redoStack.current.length}
            icon={<FaRedo />}
            size="xs"
            title="Yinele"
            variant="plain"
            onClick={redo}
          />
          <div className="mx-1 h-6 w-px bg-slate-200 dark:bg-slate-700" />
          <Button
            icon={<FaSync />}
            size="sm"
            title={translate('::App.DeveloperKitComponentDesigner.ResetCanvas')}
            variant="plain"
            onClick={() => {
              commitDocument(() => createEmptyDesignerDocument('visual'))
              setSelectedId(null)
            }}
          >
            {translate('::App.Platform.Reset')}
          </Button>
          <Button
            icon={<FaEye />}
            size="sm"
            title={translate('::App.DeveloperKitComponentDesigner.OpenInNewTab')}
            variant="plain"
            onClick={() => {
              const routePath = component.routePath.startsWith('/')
                ? component.routePath
                : `/${component.routePath}`
              window.open(routePath, '_blank')
            }}
          >
            {translate('::App.Platform.OpenUrl')}
          </Button>
          <Button
            loading={isSaving}
            icon={<FaRegSave />}
            size="sm"
            variant="solid"
            onClick={() => void handleSave()}
          >
            {translate('::App.Platform.Save')}
          </Button>
        </div>
      </header>

      <div className="flex min-h-0 flex-1">
        {workspaceTab === 'design' && (
          <aside className="flex w-80 shrink-0 flex-col border-r border-slate-200 bg-white dark:border-slate-800 dark:bg-slate-900">
            <div className="border-b border-slate-200 p-3 dark:border-slate-800">
              <div className="mb-2 flex items-center gap-2 text-xs font-semibold uppercase tracking-wider text-slate-500">
                <FaPlus /> Toolbox
              </div>
              <label className="relative block">
                <FaSearch className="absolute left-2.5 top-2.5 text-xs text-slate-400" />
                <input
                  className="w-full rounded-md border border-slate-200 bg-slate-50 py-2 pl-8 pr-2 text-xs outline-none focus:border-sky-400 dark:border-slate-700 dark:bg-slate-950"
                  placeholder={translate('::App.DeveloperKitComponentDesigner.SearchComponent')}
                  value={search}
                  onChange={(event) => setSearch(event.target.value)}
                />
              </label>
            </div>
            <div className="flex-1 overflow-y-auto p-2">
              {groupedCatalog.map(([group, definitions]) => (
                <section key={group} className="mb-5">
                  <button
                    aria-expanded={expandedToolboxGroups[group] || Boolean(search.trim())}
                    className="mb-2 flex w-full items-center gap-2 rounded bg-slate-100 px-2 py-1.5 text-left text-[10px] font-bold uppercase tracking-widest text-slate-600 dark:bg-slate-800 dark:text-slate-300"
                    type="button"
                    onClick={() =>
                      setExpandedToolboxGroups((current) => ({
                        ...current,
                        [group]: !current[group],
                      }))
                    }
                  >
                    {expandedToolboxGroups[group] || search.trim() ? (
                      <FaChevronDown className="shrink-0" />
                    ) : (
                      <FaChevronRight className="shrink-0" />
                    )}
                    <span>{TOOLBOX_GROUP_LABELS[group]}</span>
                    <span className="ml-auto rounded bg-white/70 px-1.5 py-0.5 text-[9px] font-medium tracking-normal dark:bg-slate-900/60">
                      {definitions.length}
                    </span>
                  </button>
                  {(expandedToolboxGroups[group] || Boolean(search.trim())) && (
                    <div className="grid grid-cols-3 gap-1.5">
                      {definitions.map((definition) => (
                        <button
                          key={`${definition.toolboxGroup}-${definition.name}`}
                          draggable
                          className={`group min-w-0 rounded-lg border bg-white px-2 py-2.5 text-left transition hover:border-sky-400 hover:bg-sky-50 dark:bg-slate-900 dark:hover:border-sky-600 dark:hover:bg-sky-950 ${
                            activeDrag?.source === 'library' && activeDrag.name === definition.name
                              ? 'border-sky-500 ring-2 ring-sky-300 dark:border-sky-500'
                              : 'border-slate-200 dark:border-slate-700'
                          }`}
                          title={
                            definition.acceptsChildren
                              ? `${translate('::' + definition.description)}\n\n${translate('::App.DeveloperKitComponentDesigner.AcceptsChildren')}`
                              : translate('::' + definition.description)
                          }
                          type="button"
                          onClick={() => addComponent(definition.name, null)}
                          onDragStart={(event) => {
                            const payload = JSON.stringify({
                              source: 'library',
                              name: definition.name,
                            })
                            event.dataTransfer.effectAllowed = 'copy'
                            event.dataTransfer.setData(DESIGNER_DRAG_TYPE, payload)
                            event.dataTransfer.setData('text/plain', payload)
                            // Canvas bırakma hedeflerini vurgulayabilmek için
                            // sürüklemenin başladığını duyuruyoruz — senkron bir
                            // state güncellemesi sürüklemeyi iptal ettirebildiği
                            // için bir tık sonraya bırakarak.
                            beginDesignerDragSoon({ source: 'library', name: definition.name })
                          }}
                          onDragEnd={() => endDesignerDrag()}
                        >
                          <div className="mb-1 flex h-6 w-6 items-center justify-center rounded bg-slate-100 text-[10px] font-bold text-slate-500 group-hover:bg-sky-100 group-hover:text-sky-600 dark:bg-slate-800">
                            {definition.name.slice(0, 2).toUpperCase()}
                          </div>
                          <div className="truncate text-[11px] font-medium text-slate-700 dark:text-slate-200">
                            {definition.name}
                          </div>
                        </button>
                      ))}
                    </div>
                  )}
                </section>
              ))}
            </div>
          </aside>
        )}

        <main className="flex min-w-0 flex-1 flex-col">
          <div className="flex h-12 shrink-0 items-center justify-between border-b border-slate-200 bg-white px-3 dark:border-slate-800 dark:bg-slate-900">
            <div className="flex h-full items-center gap-1">
              {(
                [
                  ['design', 'Design', <FaMousePointer key="design" />],
                  ['data', 'Data', <FaDatabase key="data" />],
                  ['code', 'React', <FaCode key="code" />],
                  ['event', 'Event', <FaBolt key="js" />],
                ] as [WorkspaceTab, string, React.ReactNode][]
              ).map(([tab, label, icon]) => (
                <button
                  key={tab}
                  className={`flex h-full items-center gap-1.5 border-b-2 px-3 text-xs font-medium ${workspaceTab === tab ? 'border-sky-500 text-sky-600' : 'border-transparent text-slate-500 hover:text-slate-800 dark:hover:text-white'}`}
                  type="button"
                  onClick={() => setWorkspaceTab(tab)}
                >
                  {icon}
                  {label}
                </button>
              ))}
            </div>
            <div className="flex items-center gap-2">
              {workspaceTab === 'design' && (
                <div className="flex items-center rounded-md border border-slate-200 p-0.5 dark:border-slate-700">
                  {(
                    [
                      ['responsive', <FaDesktop key="r" />, 'Responsive'],
                      ['desktop', <FaDesktop key="d" />, 'Desktop'],
                      ['tablet', <FaTabletAlt key="t" />, 'Tablet'],
                      ['mobile', <FaMobileAlt key="m" />, 'Mobile'],
                    ] as [DesignerDocument['canvas']['width'], React.ReactNode, string][]
                  ).map(([width, icon, label]) => (
                    <button
                      key={width}
                      className={`rounded p-1.5 ${document.canvas.width === width ? 'bg-sky-100 text-sky-600 dark:bg-sky-950' : 'text-slate-400 hover:text-slate-700 dark:hover:text-slate-200'}`}
                      title={label}
                      type="button"
                      onClick={() =>
                        commitDocument((current) => ({
                          ...current,
                          canvas: { ...current.canvas, width },
                        }))
                      }
                    >
                      {icon}
                    </button>
                  ))}
                </div>
              )}
              {/* Reachable from every tab: the examples are just as useful while
                  laying out the page as they are inside the event editor. */}
              <button
                className={`flex items-center gap-1.5 rounded-md border px-2.5 py-1.5 text-xs font-medium ${
                  scriptApiOpen
                    ? 'border-sky-500 bg-sky-50 text-sky-600 dark:bg-sky-950'
                    : 'border-slate-200 text-slate-500 hover:text-slate-800 dark:border-slate-700 dark:hover:text-white'
                }`}
                title={translate('::App.DeveloperKitComponentDesigner.ScriptApiExamples')}
                type="button"
                onClick={() => setScriptApiOpen((current) => !current)}
              >
                <FaBolt />
                Script API
                <span className="rounded bg-sky-100 px-1 py-0.5 text-[9px] font-semibold text-sky-700 dark:bg-sky-900 dark:text-sky-300">
                  {DESIGNER_SCRIPT_RECIPES.length}
                </span>
              </button>
            </div>
          </div>

          <div className="min-h-0 flex-1 overflow-auto bg-slate-200 p-5 dark:bg-slate-950">
            {workspaceTab === 'design' ? (
              <div
                className="mx-auto min-h-full overflow-hidden rounded-lg bg-white text-slate-900 shadow-lg transition-[width] duration-200 dark:bg-slate-900 dark:text-slate-100"
                style={{ width: CANVAS_WIDTHS[document.canvas.width], maxWidth: '100%' }}
              >
                {canvas}
              </div>
            ) : workspaceTab === 'data' ? (
              <div className="w-full space-y-4">
                <div className="flex items-center justify-between rounded-lg border border-slate-200 bg-white p-4 shadow-sm dark:border-slate-800 dark:bg-slate-900">
                  <div className="min-w-0">
                    <h2 className="flex items-center gap-2 font-semibold text-slate-800 dark:text-white">
                      <FaDatabase className="text-sky-600" /> Data sources
                    </h2>
                    <p className="mt-1 text-xs text-slate-500">
                      {translate('::App.DeveloperKitComponentDesigner.ApiAuthHint')}
                    </p>
                  </div>
                  <div className="flex shrink-0 gap-2">
                    <Button icon={<FaPlus />} size="sm" variant="solid" onClick={addDataSource}>
                      {translate('::App.DeveloperKitComponentDesigner.NewEndpoint')}
                    </Button>
                  </div>
                </div>
                <div className="rounded-lg border border-sky-200 bg-sky-50 p-3 text-xs text-sky-900 dark:border-sky-900 dark:bg-sky-950 dark:text-sky-200">
                  {translate('::App.DeveloperKitComponentDesigner.GetPostHint')}
                </div>
                <div className="rounded-lg border border-sky-200 bg-sky-50 p-3 text-xs text-sky-900 dark:border-sky-900 dark:bg-sky-950 dark:text-sky-200">
                  {translate('::App.DeveloperKitComponentDesigner.EndpointSettingsHint')}
                </div>
                {(reusableDataSources.length > 0 || endpointCatalogError) && (
                  <div className="rounded-lg border border-slate-200 bg-white p-4 shadow-sm dark:border-slate-800 dark:bg-slate-900">
                    <div className="mb-3">
                      <h3 className="text-sm font-semibold text-slate-800 dark:text-white">
                        {translate('::App.DeveloperKitComponentDesigner.AvailableSources')}
                      </h3>
                      <p className="mt-1 text-[10px] text-slate-500">
                        {translate('::App.DeveloperKitComponentDesigner.AvailableSourcesHint')}
                      </p>
                    </div>
                    {renderReusableDataSources()}
                  </div>
                )}
              </div>
            ) : workspaceTab === 'code' ? (
              <div className="h-full min-h-[560px] overflow-hidden rounded-lg border border-slate-700 bg-[#1e1e1e]">
                <div className="flex items-center justify-between border-b border-slate-700 bg-slate-900 px-3 py-2 text-xs text-slate-300">
                  <span>
                    {document.sourceMode === 'visual'
                      ? 'Generated React · read-only'
                      : 'Advanced React source'}
                  </span>
                  {document.sourceMode === 'visual' && (
                    <span className="text-emerald-400">Schema synchronized</span>
                  )}
                </div>
                <Editor
                  height="calc(100% - 36px)"
                  language="typescript"
                  options={{
                    automaticLayout: true,
                    fontSize: 13,
                    minimap: { enabled: false },
                    readOnly: document.sourceMode === 'visual',
                    scrollBeyondLastLine: false,
                  }}
                  theme="vs-dark"
                  value={document.sourceMode === 'visual' ? generatedCode : manualCode}
                  onChange={(value) => document.sourceMode === 'code' && setManualCode(value || '')}
                />
              </div>
            ) : (
              <div className="flex min-h-[620px] w-full overflow-hidden rounded-lg border border-slate-200 bg-white shadow-sm dark:border-slate-800 dark:bg-slate-900">
                <div className="w-72 shrink-0 border-r border-slate-200 bg-slate-50 p-3 dark:border-slate-800 dark:bg-slate-950">
                  <div className="mb-3">
                    <h2 className="flex items-center gap-2 font-semibold text-slate-800 dark:text-white">
                      <FaBolt className="text-amber-500" /> Event workspace
                    </h2>
                    <p className="mt-1 text-[10px] leading-4 text-slate-500">
                      {translate('::App.DeveloperKitComponentDesigner.EventsHint')}
                    </p>
                  </div>
                  <div className="space-y-1">
                    {javascriptEventTargets.length ? (
                      javascriptEventTargets.map((target) => (
                        <button
                          key={target.node.id}
                          className={`flex w-full items-center gap-2 rounded-md border px-2.5 py-2 text-left transition ${activeJavaScriptTarget?.node.id === target.node.id ? 'border-amber-400 bg-amber-50 text-amber-800 dark:bg-amber-950 dark:text-amber-200' : 'border-transparent text-slate-600 hover:border-slate-200 hover:bg-white dark:text-slate-300 dark:hover:border-slate-700 dark:hover:bg-slate-900'}`}
                          type="button"
                          onClick={() => setSelectedId(target.node.id)}
                        >
                          <FaBolt className="shrink-0 text-[10px]" />
                          <span className="min-w-0 flex-1 truncate text-xs font-semibold">
                            {target.node.type}
                          </span>
                          <span className="rounded bg-slate-200 px-1.5 py-0.5 text-[9px] dark:bg-slate-800">
                            {target.eventNames.length}
                          </span>
                        </button>
                      ))
                    ) : (
                      <p className="rounded-md border border-dashed border-slate-300 p-3 text-xs leading-5 text-slate-500 dark:border-slate-700">
                        {translate('::App.DeveloperKitComponentDesigner.NoEventComponent')}
                      </p>
                    )}
                  </div>
                  {/* Every component on the page is addressable from any script,
                      which is what makes cross component behaviour possible. */}
                  <div className="mt-4 border-t border-slate-200 pt-3 dark:border-slate-800">
                    <h3 className="text-[11px] font-semibold uppercase tracking-wider text-slate-400">
                      Referanslar
                    </h3>
                    <p className="mb-2 mt-1 text-[10px] leading-4 text-slate-500">
                      {translate('::App.DeveloperKitComponentDesigner.RefsAccessHint')}{' '}
                      <code>setValue</code>, <code>setVisible</code>, <code>setEnabled</code>,{' '}
                      <code>setReadOnly</code>, <code>setText</code>, <code>setProps</code>,{' '}
                      <code>getValue</code>.
                    </p>
                    <div className="max-h-64 space-y-1 overflow-y-auto">
                      {[...documentRefs.entries()].map(([ref, node]) => (
                        <button
                          key={ref}
                          className="flex w-full items-center gap-2 rounded border border-transparent px-2 py-1 text-left hover:border-slate-200 hover:bg-white dark:hover:border-slate-700 dark:hover:bg-slate-900"
                          title={translate('::App.DeveloperKitComponentDesigner.CopyRefName')}
                          type="button"
                          onClick={() => copyRefName(ref)}
                        >
                          <code className="min-w-0 flex-1 truncate text-[10px] text-sky-600">
                            {ref}
                          </code>
                          <span className="shrink-0 text-[9px] text-slate-400">{node.type}</span>
                        </button>
                      ))}
                      {!documentRefs.size && (
                        <p className="text-[10px] text-slate-400">
                          {translate('::App.DeveloperKitComponentDesigner.NoComponentAdded')}
                        </p>
                      )}
                    </div>
                  </div>
                </div>

                <div className="min-w-0 flex-1 overflow-y-auto p-5">
                  <div className="mb-5 rounded-lg border border-slate-200 p-4 dark:border-slate-800">
                    <div className="mb-2 flex items-center justify-between">
                      <div>
                        <h3 className="text-sm font-semibold text-slate-800 dark:text-white">
                          Component lifecycle
                        </h3>
                        <p className="mt-0.5 text-[10px] text-slate-500">
                          {translate('::App.DeveloperKitComponentDesigner.OnMountHint')}
                        </p>
                      </div>
                      <code className="text-[10px] text-sky-600">onMount()</code>
                    </div>
                    <Editor
                      height="150px"
                      language="javascript"
                      options={{
                        automaticLayout: true,
                        fontSize: 12,
                        minimap: { enabled: false },
                        scrollBeyondLastLine: false,
                      }}
                      theme="vs-dark"
                      value={document.lifecycle.onMount}
                      onChange={(value) =>
                        commitDocument((current) => ({
                          ...current,
                          lifecycle: { onMount: value || '' },
                        }))
                      }
                    />
                  </div>

                  {activeJavaScriptTarget ? (
                    <div>
                      <div className="mb-3 flex items-center justify-between">
                        <div>
                          <h3 className="font-semibold text-slate-800 dark:text-white">
                            {activeJavaScriptTarget.node.type}
                          </h3>
                          <code className="text-[10px] text-slate-400">
                            {activeJavaScriptTarget.node.id}
                          </code>
                        </div>
                        <span className="rounded bg-amber-100 px-2 py-1 text-[10px] font-semibold text-amber-700 dark:bg-amber-950 dark:text-amber-200">
                          {activeJavaScriptTarget.eventNames.length} event
                        </span>
                      </div>
                      <div className="grid gap-4 xl:grid-cols-2">
                        {activeJavaScriptTarget.eventNames.map((eventName) => (
                          <label
                            key={eventName}
                            className={`overflow-hidden rounded-lg border dark:border-slate-800 ${eventName === activeEventName ? 'border-amber-400' : 'border-slate-200'}`}
                            onFocus={() => setFocusedEventName(eventName)}
                          >
                            <span className="flex items-center justify-between bg-slate-50 px-3 py-2 text-xs font-semibold text-slate-700 dark:bg-slate-950 dark:text-slate-200">
                              <span
                                className="min-w-0 truncate"
                                title={
                                  getSqlDataSourceEvent(eventName)?.description
                                    ? translate(
                                        '::' + getSqlDataSourceEvent(eventName)!.description,
                                      )
                                    : undefined
                                }
                              >
                                <code>{eventName}(event)</code>
                                {getSqlDataSourceEvent(eventName) &&
                                  isSqlDataSourceNode(activeJavaScriptTarget.node.type) && (
                                    <span className="ml-2 font-normal text-slate-400">
                                      {getSqlDataSourceEvent(eventName)?.label}
                                    </span>
                                  )}
                              </span>
                              <span className="flex shrink-0 items-center gap-2">
                                <span className="text-[9px] font-normal text-slate-400">
                                  {activeJavaScriptTarget.node.type}
                                </span>
                                <button
                                  className="rounded bg-indigo-100 px-2 py-1 text-[9px] font-semibold text-indigo-700 hover:bg-indigo-200 dark:bg-indigo-950 dark:text-indigo-300"
                                  title={translate(
                                    '::App.DeveloperKitComponentDesigner.RuleBasedScriptBuilder',
                                  )}
                                  type="button"
                                  onClick={() =>
                                    setScriptBuilderTarget({
                                      nodeId: activeJavaScriptTarget.node.id,
                                      eventName,
                                    })
                                  }
                                >
                                  Builder
                                </button>
                                <button
                                  className="rounded bg-sky-100 px-2 py-1 text-[9px] font-semibold text-sky-700 hover:bg-sky-200 disabled:cursor-not-allowed disabled:opacity-40 dark:bg-sky-950 dark:text-sky-300"
                                  disabled={Boolean(
                                    activeJavaScriptTarget.node.events[eventName]?.trim(),
                                  )}
                                  type="button"
                                  onClick={() =>
                                    updateNodeEvent(
                                      activeJavaScriptTarget.node.id,
                                      eventName,
                                      resolveRecipeCode(
                                        getDesignerEventSnippet(
                                          activeJavaScriptTarget.node.type,
                                          eventName,
                                        ),
                                      ),
                                    )
                                  }
                                >
                                  {translate('::App.DeveloperKitComponentDesigner.AddSnippet')}
                                </button>
                              </span>
                            </span>
                            <Editor
                              height="190px"
                              language="javascript"
                              options={{
                                automaticLayout: true,
                                fontSize: 12,
                                minimap: { enabled: false },
                                scrollBeyondLastLine: false,
                              }}
                              theme="vs-dark"
                              value={activeJavaScriptTarget.node.events[eventName] || ''}
                              onChange={(value) =>
                                updateNodeEvent(
                                  activeJavaScriptTarget.node.id,
                                  eventName,
                                  value || '',
                                )
                              }
                            />
                          </label>
                        ))}
                      </div>
                    </div>
                  ) : (
                    <div className="rounded-lg border border-dashed border-slate-300 p-8 text-center text-sm text-slate-500 dark:border-slate-700">
                      {translate('::App.DeveloperKitComponentDesigner.NoEditableEvent')}
                    </div>
                  )}
                </div>
              </div>
            )}
          </div>
        </main>

        {workspaceTab === 'design' && (
          <aside
            data-property-panel
            className="flex w-72 shrink-0 flex-col border-l border-slate-200 bg-white dark:border-slate-800 dark:bg-slate-900"
          >
            <div className="flex h-12 shrink-0 border-b border-slate-200 dark:border-slate-800">
              {(
                [
                  ['properties', <FaSlidersH key="p" />, 'Properties'],
                  ['data', <FaDatabase key="d" />, 'Data'],
                  ['tree', <FaLayerGroup key="t" />, 'Tree'],
                ] as [InspectorTab, React.ReactNode, string][]
              ).map(([tab, icon, label]) => (
                <button
                  key={tab}
                  className={`flex flex-1 items-center justify-center gap-1 border-b-2 text-[11px] ${tab === 'data' && !selectedIsDataComponent ? 'cursor-not-allowed border-transparent text-slate-300 dark:text-slate-700' : inspectorTab === tab ? 'border-sky-500 text-sky-600' : 'border-transparent text-slate-500'}`}
                  disabled={tab === 'data' && !selectedIsDataComponent}
                  title={
                    tab === 'data' && !selectedIsDataComponent
                      ? translate('::App.DeveloperKitComponentDesigner.DataTabOnlyForDataCategory')
                      : undefined
                  }
                  type="button"
                  onClick={() => {
                    if (tab !== 'data' || selectedIsDataComponent) setInspectorTab(tab)
                  }}
                >
                  {icon}
                  {label}
                </button>
              ))}
            </div>
            <div className="flex-1 overflow-y-auto p-3">
              {inspectorTab === 'tree' ? (
                <div>
                  {document.nodes.length ? (
                    renderTree(document.nodes)
                  ) : (
                    <p className="p-3 text-xs text-slate-400">
                      {translate('::App.DeveloperKitComponentDesigner.NoComponentYet')}
                    </p>
                  )}
                </div>
              ) : selectedNode ? (
                <>
                  <div className="mb-4 rounded-lg bg-slate-50 p-3 dark:bg-slate-950">
                    <div className="text-[10px] uppercase tracking-wider text-slate-400">
                      Selected component
                    </div>
                    <div className="mt-1 flex items-center justify-between">
                      <strong className="text-sm text-slate-800 dark:text-white">
                        {selectedNode.type}
                      </strong>
                      <button
                        className="rounded p-1.5 text-red-500 hover:bg-red-50"
                        title={translate('::App.ComponentAction.Delete')}
                        type="button"
                        onClick={() => deleteNode(selectedNode.id)}
                      >
                        <FaTrash />
                      </button>
                    </div>
                    <code className="text-[10px] text-slate-400">{selectedNode.id}</code>
                    <div className="mt-2 border-t border-slate-200 pt-2 dark:border-slate-800">
                      <span className="flex items-center justify-between text-[10px] font-semibold uppercase tracking-wider text-slate-400">
                        Ref
                        <button
                          className="font-mono text-[10px] font-normal normal-case tracking-normal text-sky-600 hover:underline"
                          title={translate('::App.Platform.CopyToClipboard')}
                          type="button"
                          onClick={() => copyRefName(selectedNode.ref || '')}
                        >
                          refs.{selectedNode.ref}
                        </button>
                      </span>
                      <input
                        className="mt-1 w-full rounded border border-slate-300 bg-white px-2 py-1 font-mono text-[11px] text-slate-700 dark:border-slate-700 dark:bg-slate-900 dark:text-slate-200"
                        spellCheck={false}
                        value={refDraft}
                        onBlur={commitRefRename}
                        onChange={(event) => setRefDraft(event.target.value)}
                        onKeyDown={(event) => {
                          if (event.key === 'Enter') event.currentTarget.blur()
                        }}
                      />
                      {refError ? (
                        <p className="mt-1 text-[10px] leading-4 text-red-500">{refError}</p>
                      ) : (
                        <p className="mt-1 text-[10px] leading-4 text-slate-400">
                          {translate('::App.DeveloperKitComponentDesigner.RefRenameHint')}
                        </p>
                      )}
                    </div>
                    {selectedDefinition?.interfaceName && (
                      <div className="mt-2 border-t border-slate-200 pt-2 dark:border-slate-800">
                        <div className="text-[10px] font-semibold text-sky-600">
                          {selectedDefinition.interfaceName}
                        </div>
                        <div
                          className="truncate text-[9px] text-slate-400"
                          title={selectedDefinition.sourceFile}
                        >
                          {selectedDefinition.sourceFile}
                        </div>
                      </div>
                    )}
                  </div>
                  {inspectorTab === 'properties' ? (
                    <>
                      {selectedProperties
                        .filter(
                          (property) =>
                            property.category !== 'events' &&
                            property.type !== 'function' &&
                            !(
                              isOptionDataComponent(selectedNode.type) &&
                              property.name === getOptionDataProperty(selectedNode.type)
                            ) &&
                            !(
                              isTabularDataComponent(selectedNode.type) &&
                              ['items', 'data', 'columns', 'dataColumns'].includes(property.name)
                            ) &&
                            // Command slots and the key/collection settings are
                            // owned by the SqlDataSource panel in the Data tab.
                            !(
                              selectedIsSqlDataSource &&
                              [
                                ...SQL_DATA_SOURCE_SLOTS.map((slot) => slot.property),
                                'keyFieldName',
                                'collectionPath',
                                'keySource',
                                'keyParamName',
                                'previewKeyValue',
                                'autoLoad',
                                'showToolbar',
                                'showNavigation',
                                'filterByUrlKey',
                              ].includes(property.name)
                            ),
                        )
                        .map((property) => {
                          const propertyValue = selectedNode.props[property.name] ?? property.value
                          const helperValue = getPropertyExampleValue(
                            property,
                            property.value,
                            translate,
                          )
                          const snippet = getPropertySnippet(property, helperValue, translate)
                          return (
                            <div
                              key={property.name}
                              className="group/property mb-4 rounded-md border border-slate-200 p-2 dark:border-slate-800"
                            >
                              <span className="mb-1.5 flex items-center justify-between text-[11px] font-medium text-slate-600 dark:text-slate-300">
                                <span>
                                  {property.name}
                                  {property.required ? (
                                    <b className="ml-0.5 text-red-500">*</b>
                                  ) : null}
                                </span>
                                <span className="flex items-center gap-1 text-[9px] font-normal text-slate-400">
                                  <span>{property.tsType || property.type}</span>
                                  <span className="group/snippet relative">
                                    <button
                                      className="rounded p-1 text-sky-500 opacity-0 transition hover:bg-sky-50 hover:text-sky-700 focus:opacity-100 group-hover/property:opacity-100 dark:hover:bg-sky-950"
                                      title={translate(
                                        '::App.DeveloperKitComponentDesigner.ApplyHelperValue',
                                      )}
                                      type="button"
                                      onClick={() =>
                                        updateSelectedProp(property.name, clone(helperValue))
                                      }
                                    >
                                      <FaBolt />
                                    </button>
                                    <span className="pointer-events-none absolute right-0 top-full z-20 mt-1 hidden w-56 rounded-md border border-slate-200 bg-white p-2 text-left font-mono text-[9px] leading-4 text-sky-700 shadow-lg group-hover/snippet:block dark:border-slate-700 dark:bg-slate-950 dark:text-sky-300">
                                      {snippet}
                                      <span className="mt-1 block font-sans text-[9px] text-slate-400">
                                        {translate(
                                          '::App.DeveloperKitComponentDesigner.ApplyHelperValueHint',
                                        )}
                                      </span>
                                    </span>
                                  </span>
                                </span>
                              </span>
                              {property.description && (
                                <p className="mb-2 text-[10px] leading-4 text-slate-400">
                                  {translate('::' + property.description)}
                                </p>
                              )}
                              <PropertyEditor
                                componentType={selectedNode?.type}
                                name={property.name}
                                type={property.type}
                                value={propertyValue}
                                options={property.options}
                                onChange={(value) => updateSelectedProp(property.name, value)}
                              />
                            </div>
                          )
                        })}
                    </>
                  ) : (
                    renderDataInspector()
                  )}
                </>
              ) : (
                <div className="space-y-4">
                  <div className="rounded-lg border border-dashed border-slate-300 p-5 text-center dark:border-slate-700">
                    <FaMousePointer className="mx-auto mb-2 text-slate-400" />
                    <p className="text-xs text-slate-500">
                      {translate('::App.DeveloperKitComponentDesigner.SelectComponentForProps')}
                    </p>
                  </div>
                </div>
              )}
            </div>
            <div className="border-t border-slate-200 bg-slate-50 px-3 py-2 text-[10px] text-slate-500 dark:border-slate-800 dark:bg-slate-950">
              <span className="font-semibold">{document.nodes.length}</span> root component ·{' '}
              <span className="font-semibold">Ctrl+S</span> save ·{' '}
              <span className="font-semibold">Del</span> delete
            </div>
          </aside>
        )}
      </div>

      {/* Everything an event script can do, as copy/paste examples filled in
          with this page's own ref names and endpoints. It is a drawer rather
          than a dialog on purpose: no backdrop, so the editor underneath stays
          usable while an example is being read or pasted. */}
      {scriptApiOpen && (
        <aside className="fixed inset-y-0 right-0 z-[90] flex w-full max-w-md flex-col border-l border-slate-200 bg-white shadow-2xl dark:border-slate-700 dark:bg-slate-900">
          <div className="flex shrink-0 items-start justify-between gap-3 border-b border-slate-200 px-4 py-3 dark:border-slate-800">
            <div className="min-w-0">
              <h2 className="flex items-center gap-2 text-sm font-semibold text-slate-800 dark:text-white">
                <FaBolt className="text-amber-500" /> Script API — yapabilecekleriniz
                <span className="shrink-0 rounded bg-sky-100 px-1.5 py-0.5 text-[9px] font-semibold text-sky-700 dark:bg-sky-950 dark:text-sky-300">
                  {translate('::App.DeveloperKitComponentDesigner.ExampleCount', {
                    count: DESIGNER_SCRIPT_RECIPES.length,
                  })}
                </span>
              </h2>
              <code className="mt-1 block text-[10px] text-slate-400">
                event · component · props · refs · api · notify
              </code>
            </div>
            <button
              className="rounded p-1.5 text-slate-400 hover:bg-slate-100 hover:text-slate-700 dark:hover:bg-slate-800 dark:hover:text-white"
              title={translate('::App.Platform.CloseWithEsc')}
              type="button"
              onClick={() => setScriptApiOpen(false)}
            >
              ×
            </button>
          </div>
          <div className="shrink-0 border-b border-slate-200 px-4 py-3 dark:border-slate-800">
            <input
              className="w-full rounded-md border border-slate-300 bg-white px-3 py-1.5 text-xs text-slate-700 dark:border-slate-700 dark:bg-slate-950 dark:text-slate-200"
              placeholder={translate('::App.DeveloperKitComponentDesigner.SearchExample')}
              value={scriptApiSearch}
              onChange={(event) => setScriptApiSearch(event.target.value)}
            />
            {activeEventName ? (
              <p className="mt-2 text-[10px] text-slate-500">
                {translate('::App.DeveloperKitComponentDesigner.AppendExampleHintPrefix')}{' '}
                <code className="text-amber-600 dark:text-amber-400">{activeEventName}</code>{' '}
                {translate('::App.DeveloperKitComponentDesigner.AppendExampleHintSuffix')}
              </p>
            ) : (
              <p className="mt-2 text-[10px] text-slate-400">
                {translate('::App.DeveloperKitComponentDesigner.ExampleInsertHint')}
              </p>
            )}
          </div>
          <div className="min-h-0 flex-1 overflow-auto px-4 py-3">
            {DESIGNER_SCRIPT_RECIPE_GROUPS.map((group) => {
              const recipes = filteredScriptRecipes.filter((recipe) => recipe.group === group)
              if (!recipes.length) return null
              return (
                <div key={group} className="mb-4 last:mb-0">
                  <h4 className="mb-2 text-[10px] font-semibold uppercase tracking-wider text-slate-400">
                    {group}
                  </h4>
                  <div className="grid gap-2">
                    {recipes.map((recipe) => {
                      const recipeCode = resolveRecipeCode(recipe.code)
                      return (
                        <div
                          key={recipe.title}
                          className="overflow-hidden rounded-md border border-slate-200 dark:border-slate-800"
                        >
                          <div className="flex items-start justify-between gap-2 px-3 pt-2">
                            <div className="min-w-0">
                              <div className="text-xs font-semibold text-slate-700 dark:text-slate-200">
                                {translate('::' + recipe.title)}
                              </div>
                              <p className="text-[10px] leading-4 text-slate-400">
                                {translate('::' + recipe.description)}
                              </p>
                            </div>
                            <span className="flex shrink-0 items-center gap-1">
                              {activeEventName && (
                                <button
                                  className="rounded bg-amber-100 px-2 py-1 text-[9px] font-semibold text-amber-700 hover:bg-amber-200 dark:bg-amber-950 dark:text-amber-300"
                                  title={translate(
                                    '::App.DeveloperKitComponentDesigner.AppendToEventScript',
                                    { event: activeEventName },
                                  )}
                                  type="button"
                                  onClick={() => appendScriptToEvent(recipeCode)}
                                >
                                  {translate('::App.Platform.Add')}
                                </button>
                              )}
                              <button
                                className="rounded bg-sky-100 px-2 py-1 text-[9px] font-semibold text-sky-700 hover:bg-sky-200 dark:bg-sky-950 dark:text-sky-300"
                                type="button"
                                onClick={() =>
                                  copyToClipboard(
                                    recipeCode,
                                    translate('::App.DeveloperKitComponentDesigner.ExampleCopied'),
                                  )
                                }
                              >
                                {translate('::App.Platform.Copy')}
                              </button>
                            </span>
                          </div>
                          <pre className="mt-2 overflow-x-auto bg-slate-950 px-3 py-2 font-mono text-[10px] leading-4 text-sky-200">
                            {recipeCode}
                          </pre>
                        </div>
                      )
                    })}
                  </div>
                </div>
              )
            })}
            {!filteredScriptRecipes.length && (
              <p className="rounded-md border border-dashed border-slate-300 p-4 text-center text-xs text-slate-500 dark:border-slate-700">
                {translate('::App.DeveloperKitComponentDesigner.NoMatchingExample')}
              </p>
            )}
          </div>
        </aside>
      )}

      {catalogSourceEditor && (
        <div className="fixed inset-0 z-[100] flex items-center justify-center bg-slate-950/70 p-4">
          <div className="w-full max-w-2xl overflow-hidden rounded-xl border border-slate-200 bg-white shadow-2xl dark:border-slate-700 dark:bg-slate-900">
            <div className="flex items-start justify-between border-b border-slate-200 px-5 py-4 dark:border-slate-700">
              <div>
                <h2 className="text-sm font-semibold text-slate-800 dark:text-white">
                  {translate(
                    catalogSourceEditor.item
                      ? '::App.DeveloperKitComponentDesigner.EditEndpointTitle'
                      : '::App.DeveloperKitComponentDesigner.NewEndpoint',
                  )}
                </h2>
                <p className="mt-1 text-[10px] text-slate-500">
                  {catalogSourceEditor.item?.origin ||
                    translate('::App.DeveloperKitComponentDesigner.NewEndpointHint')}
                </p>
              </div>
              <button
                className="rounded p-1.5 text-slate-400 hover:bg-slate-100 hover:text-slate-700 dark:hover:bg-slate-800 dark:hover:text-white"
                title={translate('::App.Platform.Close')}
                type="button"
                onClick={() => {
                  setCatalogSourceEditor(null)
                  setCatalogSourceTestResult(null)
                }}
              >
                ×
              </button>
            </div>

            <div className="space-y-4 p-5">
              <div className="grid gap-4 md:grid-cols-[1fr_110px]">
                <label>
                  <span className="mb-1.5 block text-[10px] font-semibold uppercase text-slate-500">
                    Ad
                  </span>
                  <input
                    className="w-full rounded-md border border-slate-300 bg-white px-3 py-2 text-xs text-slate-800 outline-none focus:border-sky-500 dark:border-slate-700 dark:bg-slate-950 dark:text-slate-100"
                    value={catalogSourceEditor.draft.name}
                    onChange={(event) => updateCatalogSourceDraft({ name: event.target.value })}
                  />
                </label>
                <label>
                  <span className="mb-1.5 block text-[10px] font-semibold uppercase text-slate-500">
                    Metot
                  </span>
                  <select
                    className="w-full rounded-md border border-slate-300 bg-white px-3 py-2 text-xs text-slate-800 outline-none focus:border-sky-500 dark:border-slate-700 dark:bg-slate-950 dark:text-slate-100"
                    value={catalogSourceEditor.draft.method}
                    onChange={(event) =>
                      updateCatalogSourceDraft({
                        method: event.target.value as DesignerHttpMethod,
                      })
                    }
                  >
                    {DESIGNER_HTTP_METHODS.map((method) => (
                      <option key={method} value={method}>
                        {method}
                      </option>
                    ))}
                  </select>
                </label>
              </div>
              <label className="block">
                <span className="mb-1.5 block text-[10px] font-semibold uppercase text-slate-500">
                  Endpoint URL
                </span>
                <input
                  className="w-full rounded-md border border-slate-300 bg-white px-3 py-2 font-mono text-xs text-slate-800 outline-none focus:border-sky-500 dark:border-slate-700 dark:bg-slate-950 dark:text-slate-100"
                  placeholder="/api/app/customers"
                  value={catalogSourceEditor.draft.url}
                  onChange={(event) => updateCatalogSourceDraft({ url: event.target.value })}
                />
              </label>
              <label className="block">
                <span className="mb-1.5 block text-[10px] font-semibold uppercase text-slate-500">
                  {translate('::App.DeveloperKitComponentDesigner.ResponseRootPath')}{' '}
                  <span className="font-normal normal-case">
                    ({translate('::App.PublicCommon.Optional')})
                  </span>
                </span>
                <input
                  className="w-full rounded-md border border-slate-300 bg-white px-3 py-2 font-mono text-xs text-slate-800 outline-none focus:border-sky-500 dark:border-slate-700 dark:bg-slate-950 dark:text-slate-100"
                  placeholder="result.items"
                  value={catalogSourceEditor.draft.responsePath}
                  onChange={(event) =>
                    updateCatalogSourceDraft({ responsePath: event.target.value })
                  }
                />
              </label>

              {catalogSourceTestResult && catalogSourceTestResult.status !== 'success' && (
                <div
                  className={`max-h-56 overflow-auto whitespace-pre-wrap break-all rounded-md p-3 font-mono text-[11px] ${
                    catalogSourceTestResult.status === 'error'
                      ? 'bg-red-950 text-red-200'
                      : catalogSourceTestResult.status === 'loading'
                        ? 'bg-slate-950 text-slate-300'
                        : 'bg-slate-950 text-emerald-300'
                  }`}
                >
                  {catalogSourceTestResult.message}
                </div>
              )}
            </div>

            <div className="flex justify-end gap-2 border-t border-slate-200 bg-slate-50 px-5 py-4 dark:border-slate-700 dark:bg-slate-950">
              <Button
                size="sm"
                variant="plain"
                onClick={() => {
                  setCatalogSourceEditor(null)
                  setCatalogSourceTestResult(null)
                }}
              >
                {translate('::App.Platform.Cancel')}
              </Button>
              <Button
                disabled={
                  catalogSourceEditor.draft.method !== 'GET' ||
                  !isRunnableDataSourceUrl(catalogSourceEditor.draft.url)
                }
                icon={<FaPlay />}
                loading={catalogSourceTestResult?.status === 'loading'}
                size="sm"
                title={
                  catalogSourceEditor.draft.method === 'GET'
                    ? undefined
                    : translate('::App.DeveloperKitComponentDesigner.OnlyGetRunnable')
                }
                variant="default"
                onClick={() => void testCatalogSource()}
              >
                {translate('::App.Platform.Execute')}
              </Button>
              <Button
                disabled={
                  !catalogSourceEditor.draft.name.trim() ||
                  !isRunnableDataSourceUrl(catalogSourceEditor.draft.url) ||
                  (catalogSourceEditor.draft.method === 'GET' &&
                    catalogSourceTestResult?.status !== 'success')
                }
                icon={<FaRegSave />}
                loading={isCatalogSourceSaving}
                size="sm"
                variant="solid"
                onClick={() => void saveCatalogSource()}
              >
                {translate(
                  catalogSourceEditor.item
                    ? '::App.Platform.SaveChanges'
                    : '::App.DeveloperKitComponentDesigner.AddEndpoint',
                )}
              </Button>
            </div>
          </div>
        </div>
      )}
      {endpointResultModal && (
        <div
          aria-label="Endpoint sonucu"
          aria-modal="true"
          className="fixed inset-0 z-[120] flex items-center justify-center bg-slate-950/75 p-4"
          role="dialog"
          onMouseDown={(event) => {
            if (event.currentTarget === event.target) setEndpointResultModal(null)
          }}
        >
          <div className="flex max-h-[85vh] w-full max-w-5xl flex-col overflow-hidden rounded-xl border border-slate-700 bg-slate-900 shadow-2xl">
            <div className="flex items-start justify-between border-b border-slate-700 px-5 py-4">
              <div className="min-w-0">
                <div className="flex items-center gap-2">
                  <FaDatabase className="text-sky-400" />
                  <h2 className="truncate text-sm font-semibold text-white">
                    {endpointResultModal.source.name}
                  </h2>
                  <span className="rounded bg-emerald-950 px-2 py-0.5 text-[10px] font-semibold text-emerald-300">
                    {translate('::App.Platform.Success')}
                  </span>
                </div>
                <div className="mt-1 break-all font-mono text-[10px] text-slate-400">
                  {endpointResultModal.source.method} {endpointResultModal.source.url}
                </div>
              </div>
              <button
                aria-label={translate('::App.DeveloperKitComponentDesigner.CloseResultModal')}
                className="ml-4 rounded-md px-2 py-1 text-xl text-slate-400 hover:bg-slate-800 hover:text-white"
                type="button"
                onClick={() => setEndpointResultModal(null)}
              >
                ×
              </button>
            </div>
            <div className="flex items-center gap-3 border-b border-slate-800 bg-slate-950/60 px-5 py-2 text-[10px] text-slate-400">
              <span>
                Response path:{' '}
                <code className="text-sky-300">
                  {endpointResultModal.source.responsePath || '(root)'}
                </code>
              </span>
              <span className="rounded bg-slate-800 px-2 py-0.5 text-slate-300">
                {endpointResultCount}
              </span>
            </div>
            <pre className="min-h-0 flex-1 overflow-auto whitespace-pre-wrap break-words p-5 font-mono text-xs leading-5 text-emerald-300">
              {endpointResultText}
            </pre>
            <div className="flex justify-end border-t border-slate-700 bg-slate-950 px-5 py-3">
              <Button size="sm" variant="default" onClick={() => setEndpointResultModal(null)}>
                {translate('::App.Platform.Close')}
              </Button>
            </div>
          </div>
        </div>
      )}

      {scriptBuilderTarget && scriptBuilderNode && (
        <DesignerScriptBuilderDialog
          isOpen
          componentLabel={scriptBuilderNode.ref || scriptBuilderNode.type}
          eventInfo={getSqlDataSourceEvent(scriptBuilderTarget.eventName)}
          eventName={scriptBuilderTarget.eventName}
          recordFields={scriptBuilderRecordFields}
          refNames={[...documentRefs.keys()]}
          sqlRef={scriptBuilderSqlNode?.ref || ''}
          value={scriptBuilderNode.events[scriptBuilderTarget.eventName] || ''}
          onApply={(next) =>
            updateNodeEvent(scriptBuilderTarget.nodeId, scriptBuilderTarget.eventName, next)
          }
          onClose={() => setScriptBuilderTarget(null)}
        />
      )}
    </div>
  )
}

export default VisualComponentDesigner