import { Button, Dialog, Notification, toast } from '@/components/ui'
import { MenuDto } from '@/proxy/menus/models'
import { MenuItem } from '@/proxy/menus/menu'
import { MenuService } from '@/services/menu.service'
import navigationIcon from '@/proxy/menus/navigation-icon.config'
import { useEffect, useRef, useState } from 'react'
import { FaChevronDown, FaPlus } from 'react-icons/fa'
import { useLocalization } from '@/utils/hooks/useLocalization'

const menuService = new MenuService()

// ─── IconPickerField ──────────────────────────────────────────────────────────

interface IconPickerFieldProps {
  value: string
  onChange: (iconKey: string) => void
  invalid?: boolean
}

const ALL_ICON_ENTRIES = Object.entries(navigationIcon)
const ICON_PAGE_SIZE = 100

export function IconPickerField({ value, onChange, invalid }: IconPickerFieldProps) {
  const [open, setOpen] = useState(false)
  const [search, setSearch] = useState('')
  const [limit, setLimit] = useState(ICON_PAGE_SIZE)
  const wrapperRef = useRef<HTMLDivElement>(null)

  const SelectedIcon = value ? navigationIcon[value] : null
  const filtered = search.trim()
    ? ALL_ICON_ENTRIES.filter(([key]) => key.toLowerCase().includes(search.toLowerCase()))
    : ALL_ICON_ENTRIES
  const displayed = filtered.slice(0, limit)
  const hasMore = displayed.length < filtered.length
  const { translate } = useLocalization()

  useEffect(() => {
    setLimit(ICON_PAGE_SIZE)
  }, [search])

  useEffect(() => {
    function handleClickOutside(e: MouseEvent) {
      if (wrapperRef.current && !wrapperRef.current.contains(e.target as Node)) setOpen(false)
    }
    if (open) document.addEventListener('mousedown', handleClickOutside)
    return () => document.removeEventListener('mousedown', handleClickOutside)
  }, [open])

  return (
    <div ref={wrapperRef} className="relative">
      <button
        type="button"
        onClick={() => setOpen((v) => !v)}
        className={`flex items-center gap-2 w-full h-11 px-3 py-2 rounded-lg border text-sm text-left transition-colors
          ${invalid ? 'border-red-500' : 'border-gray-300 dark:border-gray-600'}
          bg-white dark:bg-gray-800 text-gray-700 dark:text-gray-200 hover:border-indigo-400`}
      >
        {SelectedIcon ? (
          <span className="flex items-center gap-2 flex-1 truncate">
            <SelectedIcon className="text-xl shrink-0" />
            <span className="text-xs text-gray-500 truncate">{value}</span>
          </span>
        ) : (
          <span className="text-gray-400 flex-1">
            {translate('::ListForms.Wizard.Step1.SelectIcon') || 'Select icon...'}
          </span>
        )}
        <FaChevronDown
          className={`text-gray-400 text-xs transition-transform ${open ? 'rotate-180' : ''}`}
        />
      </button>

      {open && (
        <div className="absolute z-50 mt-1 left-0 w-[360px] bg-white dark:bg-gray-800 border border-gray-200 dark:border-gray-600 rounded-lg shadow-xl">
          <div className="p-2 border-b border-gray-100 dark:border-gray-700 flex items-center gap-2">
            <input
              autoFocus
              value={search}
              onChange={(e) => setSearch(e.target.value)}
              placeholder="Search icons… (FaHome, FcSettings)"
              className="flex-1 px-2 py-1.5 text-sm rounded border border-gray-200 dark:border-gray-600 dark:bg-gray-700 dark:text-gray-100 outline-none focus:border-indigo-400"
            />
            <span className="text-xs text-gray-400 shrink-0">{filtered.length} icons</span>
          </div>
          <div className="grid grid-cols-10 gap-0.5 p-2 max-h-[208px] overflow-y-auto">
            {displayed.map(([key, Icon]) => (
              <button
                key={key}
                type="button"
                title={key}
                onClick={() => {
                  onChange(key)
                  setOpen(false)
                  setSearch('')
                }}
                className={`flex items-center justify-center h-10 w-full rounded text-xl transition-colors
                  ${value === key ? 'bg-indigo-500 text-white' : 'hover:bg-gray-100 dark:hover:bg-gray-700 text-gray-600 dark:text-gray-300'}`}
              >
                <Icon />
              </button>
            ))}
          </div>
          {hasMore && (
            <div className="px-3 py-1.5 border-t border-gray-100 dark:border-gray-700 flex items-center justify-between">
              <span className="text-xs text-gray-400">
                {displayed.length} / {filtered.length}
              </span>
              <button
                type="button"
                onClick={() => setLimit((l) => l + ICON_PAGE_SIZE)}
                className="text-xs px-3 py-1 rounded bg-indigo-50 dark:bg-indigo-900/30 text-indigo-600 dark:text-indigo-400 hover:bg-indigo-100 dark:hover:bg-indigo-900/50 font-medium"
              >
                Load More
              </button>
            </div>
          )}
        </div>
      )}
    </div>
  )
}

// ─── MenuAddDialog ────────────────────────────────────────────────────────────

export interface MenuAddDialogProps {
  isOpen: boolean
  onClose: () => void
  initialParentCode: string
  initialOrder: number
  rawItems: (MenuItem & { id?: string })[]
  onSaved: () => void
}

export function MenuAddDialog({
  isOpen,
  onClose,
  initialParentCode,
  initialOrder,
  rawItems,
  onSaved,
}: MenuAddDialogProps) {
  const [form, setForm] = useState({
    name: '',
    code: '',
    menuTextEn: '',
    menuTextTr: '',
    parentCode: initialParentCode,
    icon: '',
    shortName: '',
    order: initialOrder,
  })
  const [saving, setSaving] = useState(false)
  const { translate } = useLocalization()

  useEffect(() => {
    if (isOpen)
      setForm({
        name: '',
        code: '',
        menuTextEn: '',
        menuTextTr: '',
        parentCode: initialParentCode,
        icon: '',
        shortName: '',
        order: initialOrder,
      })
  }, [isOpen, initialParentCode, initialOrder])

  const shortNameRequired = !form.parentCode.trim()
  console.log(form.parentCode.length)
  const handleSave = async () => {
    if (!form.code.trim() || !form.menuTextEn.trim()) return
    if (shortNameRequired && !form.shortName.trim()) return
    setSaving(true)
    try {
      await menuService.createWithLanguageKeyText({
        code: form.code.trim(),
        displayName: form.code.trim(),
        parentCode: form.parentCode.trim() || undefined,
        icon: form.icon || undefined,
        shortName: form.shortName.trim() || undefined,
        order: form.order,
        isDisabled: false,
        menuTextTr: form.menuTextTr.trim(),
        menuTextEn: form.menuTextEn.trim(),
      } as MenuDto)

      onSaved()
      onClose()
    } catch (e: any) {
      toast.push(<Notification title={e.message} type="danger" />, { placement: 'top-end' })
    } finally {
      setSaving(false)
    }
  }

  // suppress unused warning — rawItems kept for future use
  void rawItems

  const fieldCls =
    'h-11 px-3 py-2 rounded-lg border border-gray-300 dark:border-gray-600 bg-white dark:bg-gray-800 text-sm text-gray-700 dark:text-gray-200 outline-none focus:border-indigo-400 w-full'
  const disabledCls =
    'h-11 px-3 py-2 rounded-lg border border-gray-200 dark:border-gray-700 bg-gray-50 dark:bg-gray-700 text-sm text-gray-400 dark:text-gray-500 cursor-not-allowed w-full'
  const labelCls = 'text-xs font-medium text-gray-500 dark:text-gray-400 mb-1'

  const toCodeToken = (value: string) => value.replace(/\s+/g, '')
  const toSpacedLabel = (value: string) =>
    value
      .replace(/([a-z0-9])([A-Z])/g, '$1 $2')
      .replace(/([A-Z])([A-Z][a-z])/g, '$1 $2')
      .trim()

  return (
    <Dialog isOpen={isOpen} onClose={onClose} onRequestClose={onClose} width={680}>
      <div className="flex flex-col gap-5 p-5">
        {/* Header */}
        <div className="flex items-center gap-2 pb-1 border-b border-gray-100 dark:border-gray-700">
          <FaPlus className="text-green-500 text-sm" />
          <h5 className="text-base font-semibold text-gray-800 dark:text-gray-100">
            {translate('::ListForms.Wizard.Step1.AddNewMenu')}
          </h5>
        </div>

        {/* Row 1 — Name | Code */}
        <div className="grid grid-cols-2 gap-4">
          <div className="flex flex-col">
            <label className={labelCls}>
              {translate('::App.Platform.Name') || 'Name'}{' '}
              <span className="text-red-500">*</span>
            </label>
            <input
              autoFocus
              value={form.name}
              onChange={(e) => {
                const codeToken = toCodeToken(e.target.value)
                const spacedLabel = toSpacedLabel(codeToken)

                setForm((p) => ({
                  ...p,
                  name: codeToken,
                  code: `App.Wizard.${codeToken}`,
                  menuTextEn: spacedLabel,
                  menuTextTr: spacedLabel,
                  shortName: codeToken.substring(0, 3),
                }))
              }}
              placeholder="MyMenu"
              className={fieldCls}
            />
          </div>
          <div className="flex flex-col">
            <label className={labelCls}>
              {translate('::App.Platform.Code') || 'Code'}{' '}
              <span className="text-red-500">*</span>
            </label>
            <input value={form.code} disabled placeholder="App.Wizard.MyMenu" className={disabledCls} />
          </div>
        </div>

        {/* Row 2 — Icon (full width) */}
        <div className="flex flex-col">
          <label className={labelCls}>
            {translate('::ListForms.Wizard.Step4.Icon')} <span className="text-red-500">*</span>
          </label>
          <IconPickerField
            value={form.icon}
            onChange={(key) => setForm((p) => ({ ...p, icon: key }))}
          />
        </div>

        {/* Row 3 — Display Name EN | Display Name TR */}
        <div className="grid grid-cols-2 gap-4">
          <div className="flex flex-col">
            <label className={labelCls}>
              {translate('::ListForms.Wizard.Step1.DisplayNameEnglish')}{' '}
              <span className="text-red-500">*</span>
            </label>
            <input
              value={form.menuTextEn}
              onChange={(e) => setForm((p) => ({ ...p, menuTextEn: e.target.value }))}
              placeholder="My Menu"
              className={fieldCls}
            />
          </div>
          <div className="flex flex-col">
            <label className={labelCls}>
              {translate('::ListForms.Wizard.Step1.DisplayNameTurkish')}{' '}
              <span className="text-red-500">*</span>
            </label>
            <input
              value={form.menuTextTr}
              onChange={(e) => setForm((p) => ({ ...p, menuTextTr: e.target.value }))}
              placeholder="Menüm"
              className={fieldCls}
            />
          </div>
        </div>

        {/* Row 4 — Menu Parent | Order */}
        <div className="grid grid-cols-2 gap-4">
          <div className="flex flex-col">
            <label className={labelCls}>{translate('::ListForms.Wizard.Step1.MenuParent')}</label>
            <input disabled value={form.parentCode} className={disabledCls} />
          </div>
          <div className="flex flex-col">
            <label className={labelCls}>
              {translate('::ListForms.Wizard.Step1.Order') || 'Sıra (Order)'}
            </label>
            <input
              type="number"
              value={form.order}
              onChange={(e) => setForm((p) => ({ ...p, order: Number(e.target.value) }))}
              className={fieldCls}
            />
          </div>
        </div>

        {/* Row 5 — Short Name (full width) */}
        <div className="flex flex-col">
          <label className={labelCls}>
            {translate('::ListForms.Wizard.Step1.ShortName')}
            {shortNameRequired ? (
              <span className="text-red-500 ml-0.5">*</span>
            ) : (
              <span className="ml-1 text-gray-400 font-normal">
                ({translate('::ListForms.Wizard.Step1.Optional') || 'opsiyonel'})
              </span>
            )}
          </label>
          <input
            value={form.shortName}
            onChange={(e) => setForm((p) => ({ ...p, shortName: e.target.value }))}
            placeholder="Sas, Finance, Hr…"
            className={`${fieldCls}`}
          />
          {shortNameRequired && (
            <p className="text-xs text-gray-400 mt-1">
              {translate('::ListForms.Wizard.Step1.ShortNameHint') ||
                'Tablo prefix olarak kullanılır (örn. "Sas" → Sas_D_TableName)'}
            </p>
          )}
        </div>

        {/* Footer */}
        <div className="flex justify-end gap-2 pt-1 border-t border-gray-100 dark:border-gray-700">
          <Button size="sm" variant="plain" onClick={onClose}>
            {translate('::Cancel') || 'İptal'}
          </Button>
          <Button
            size="sm"
            variant="solid"
            loading={saving}
            disabled={
              !form.code.trim() ||
              !form.menuTextEn.trim() ||
              !form.menuTextTr.trim() ||
              !form.icon.trim() ||
              (shortNameRequired && !form.shortName.trim())
            }
            onClick={handleSave}
          >
            {translate('::App.Platform.Save') || 'Kaydet'}
          </Button>
        </div>
      </div>
    </Dialog>
  )
}