import React, { useEffect, useState } from 'react'
import { useComponents } from '../../contexts/ComponentContext'
import {
  FaPlus,
  FaSearch,
  FaRegEdit,
  FaTrashAlt,
  FaEye,
  FaEyeSlash,
  FaFilter,
  FaCalendarAlt,
  FaExternalLinkAlt,
  FaCog,
  FaSyncAlt,
} from 'react-icons/fa'
import Widget from '@/components/common/Widget'
import { ROUTES_ENUM } from '@/routes/route.constant'
import { useLocalization } from '@/utils/hooks/useLocalization'
import { Loading } from '../../components/shared'
import PageTitle from '@/components/shared/PageTitle'
import { Button } from '@/components/ui'
import Dialog from '@/components/ui/Dialog'
import ComponentEditor from './ComponentEditor'
import { parseComponentDependencies } from '@/contexts/componentRuntime'
import { usePermission } from '@/utils/hooks/usePermission'
import { COMPONENT_PERMISSION } from '@/constants/permission.constant'

const ComponentManager: React.FC = () => {
  const {
    components,
    loading,
    componentErrors,
    updateComponent,
    deleteComponent,
    refreshComponents,
  } = useComponents()
  const [searchTerm, setSearchTerm] = useState('')
  const [filterActive, setFilterActive] = useState<'all' | 'active' | 'inactive'>('all')
  const [isRefreshing, setIsRefreshing] = useState(false)
  const [editorComponentId, setEditorComponentId] = useState<string | null | undefined>(undefined)

  // Calculate statistics
  const totalComponents = components?.length || 0
  const activeComponents = components?.filter((c) => c.isActive).length || 0
  const inactiveComponents = totalComponents - activeComponents
  const { translate } = useLocalization()
  const { checkPermission } = usePermission()
  const canCreate = checkPermission(COMPONENT_PERMISSION.CREATE)
  const canUpdate = checkPermission(COMPONENT_PERMISSION.UPDATE)
  const canDelete = checkPermission(COMPONENT_PERMISSION.DELETE)

  useEffect(() => {
    void refreshComponents()
  }, [refreshComponents])

  const handleRefresh = async () => {
    setIsRefreshing(true)
    try {
      await refreshComponents()
    } finally {
      setIsRefreshing(false)
    }
  }

  const filteredComponents = components?.filter((component) => {
    const matchesSearch =
      component.name.toLowerCase().includes(searchTerm.toLowerCase()) ||
      (component.description || '').toLowerCase().includes(searchTerm.toLowerCase())

    const matchesFilter =
      filterActive === 'all' ||
      (filterActive === 'active' && component.isActive) ||
      (filterActive === 'inactive' && !component.isActive)

    return matchesSearch && matchesFilter
  })

  const handleToggleActive = async (id: string, isActive: boolean) => {
    try {
      const component = components?.find((c) => c.id === id)
      if (component) {
        await updateComponent(id, { ...component, isActive })
      }
    } catch (err) {
      console.error('Failed to toggle component status:', err)
    }
  }

  const handleDelete = async (id: string) => {
    if (window.confirm(translate('::App.DeveloperKitComponent.ConfirmDelete'))) {
      try {
        await deleteComponent(id)
      } catch (err) {
        console.error('Failed to delete component:', err)
      }
    }
  }

  return (
    <div className="space-y-4">
      <PageTitle title={translate('::' + 'App.DeveloperKit.Components')} />

      <div className="grid grid-cols-1 md:grid-cols-3 gap-6 mt-2 mb-4">
        <Widget
          title={translate('::App.DeveloperKitComponent.Total')}
          value={totalComponents}
          color="purple"
          icon="FaPuzzlePiece"
          valueClassName="text-3xl"
          subTitle={translate('::App.DeveloperKitComponent.TotalDescription')}
        />
        <Widget
          title={translate('::App.DeveloperKitComponent.Active')}
          value={activeComponents}
          color="green"
          icon="FaCheckCircle"
          valueClassName="text-3xl"
          subTitle={translate('::App.DeveloperKitComponent.ActiveDescription')}
        />
        <Widget
          title={translate('::App.DeveloperKitComponent.Inactive')}
          value={inactiveComponents}
          color="gray"
          icon="FaTimesCircle"
          valueClassName="text-3xl"
          subTitle={translate('::App.DeveloperKitComponent.InactiveDescription')}
        />
      </div>

      {/* Filters */}
      <div className="flex flex-col sm:flex-row gap-3">
        <div className="flex-1 relative">
          <FaSearch className="absolute left-3 top-1/2 transform -translate-y-1/2 w-5 h-5 text-slate-400" />
          <input
            type="text"
            placeholder={translate('::App.DeveloperKitComponent.SearchPlaceholder')}
            value={searchTerm}
            className="w-full pl-10 pr-2 py-1 border border-slate-300 dark:border-gray-700 rounded-lg bg-white dark:bg-gray-800 text-gray-900 dark:text-gray-100 focus:ring-2 focus:ring-blue-500 focus:border-transparent"
            onChange={(e) => setSearchTerm(e.target.value)}
          />
        </div>
        <div className="flex items-center gap-2">
          <FaFilter className="w-5 h-5 text-slate-500 dark:text-gray-400" />
          <select
            value={filterActive}
            className="px-2 py-1 border border-slate-300 dark:border-gray-700 rounded-lg bg-white dark:bg-gray-800 text-gray-900 dark:text-gray-100 focus:ring-2 focus:ring-blue-500 focus:border-transparent"
            onChange={(e) => setFilterActive(e.target.value as 'all' | 'active' | 'inactive')}
          >
            <option value="all">{translate('::App.ComponentFilter.All')}</option>
            <option value="active">
              {translate('::App.EntityFilter.Active')}
            </option>
            <option value="inactive">
              {translate('::App.EntityFilter.Inactive')}
            </option>
          </select>
        </div>
        <Button
          className="flex items-center gap-2"
          disabled={loading || isRefreshing}
          type="button"
          variant="default"
          onClick={() => void handleRefresh()}
        >
          <FaSyncAlt className={isRefreshing ? 'animate-spin' : ''} />
          {translate('::App.Platform.Refresh')}
        </Button>
        {canCreate && (
          <div>
            <Button
              type="button"
              variant="solid"
              className="flex items-center gap-2"
              onClick={() => setEditorComponentId(null)}
            >
              <FaPlus className="w-4 h-4" />
              {translate('::App.DeveloperKitComponent.New')}
            </Button>
          </div>
        )}
      </div>

      {/* Components List */}
      {loading ? (
        <div className="flex items-center justify-center min-h-screen bg-gray-50">
          <div className="text-center">
            <Loading loading={loading} />
          </div>
        </div>
      ) : filteredComponents?.length > 0 ? (
        <div className="grid grid-cols-1 lg:grid-cols-2 xl:grid-cols-4 gap-6">
          {filteredComponents.map((component) => (
            <div
              key={component.id}
              className="bg-white dark:bg-gray-900 rounded-lg border border-slate-200 dark:border-gray-700 shadow-sm hover:shadow-md transition-shadow"
            >
              <div className="p-6">
                <div className="flex items-start justify-between">
                  {/* Sol taraf */}
                  <div className="flex-1">
                    <div className="flex items-center gap-2 mb-1">
                      <h3 className="text-lg font-semibold text-slate-900 dark:text-gray-100">
                        {component.name}
                      </h3>
                      <div
                        className={`w-2 h-2 rounded-full ${
                          component.isActive ? 'bg-green-500' : 'bg-slate-300 dark:bg-gray-700'
                        }`}
                      />
                    </div>

                    <p className="text-slate-600 dark:text-gray-300 text-sm mb-2">
                      {parseComponentDependencies(component.dependencies).join(', ') ||
                        translate('::App.DeveloperKitComponent.NoDependencies')}
                    </p>

                    <p className="text-slate-600 dark:text-gray-300 text-sm mb-2">
                      {component.routePath}
                    </p>

                    {component.description && (
                      <p className="text-slate-600 dark:text-gray-300 text-sm mb-2">
                        {component.description}
                      </p>
                    )}

                    {componentErrors[component.name] && (
                      <p
                        className="text-xs text-red-700 dark:text-red-300 bg-red-50 dark:bg-red-950 border border-red-200 dark:border-red-800 rounded px-2 py-1 mb-2 break-words"
                        title={componentErrors[component.name]}
                      >
                        {componentErrors[component.name]}
                      </p>
                    )}
                  </div>

                  {/* Sağ taraf */}
                  {component.lastModificationTime && (
                    <div className="flex items-center gap-1 text-xs text-slate-500 dark:text-gray-400 ml-4 whitespace-nowrap">
                      <FaCalendarAlt className="w-3 h-3" />
                      <span>
                        {new Date(component.lastModificationTime).toLocaleDateString() ?? ''}
                      </span>
                    </div>
                  )}
                </div>

                {/* Actions */}
                <div className="flex items-center justify-between pt-2 border-t border-slate-100 dark:border-gray-700">
                  <div className="flex items-center gap-2">
                    <Button
                      type="button"
                      variant="plain"
                      shape="circle"
                      disabled={!canUpdate}
                      className={`!inline-flex !h-auto items-center gap-1 rounded !px-2 py-1 text-xs font-medium transition-colors`}
                      onClick={() => handleToggleActive(component.id, !component.isActive)}
                    >
                      {component.isActive ? (
                        <>
                          <FaEye className="w-4 h-4" />
                          {translate('::App.Listform.ListformField.IsActive')}
                        </>
                      ) : (
                        <>
                          <FaEyeSlash className="w-4 h-4" />
                          {translate('::App.Platform.Passive')}
                        </>
                      )}
                    </Button>
                  </div>
                  <div className="flex items-center gap-1">
                    {canUpdate && (
                      <Button
                        type="button"
                        variant="solid"
                        color="blue-600"
                        title={translate('::App.Platform.Edit')}
                        onClick={() =>
                          window.open(
                            ROUTES_ENUM.protected.saas.developerKit.componentsEdit.replace(
                              ':id',
                              component.id,
                            ),
                            '_blank',
                          )
                        }
                      >
                        <FaRegEdit className="w-4 h-4" />
                      </Button>
                    )}
                    <Button
                      type="button"
                      variant="solid"
                      color="gray-600"
                      disabled={!component.isActive || !component.routePath?.trim()}
                      title={translate('::App.Platform.OpenUrl')}
                      onClick={() => {
                        const routePath = component.routePath.startsWith('/')
                          ? component.routePath
                          : `/${component.routePath}`
                        window.open(routePath, '_blank')
                      }}
                    >
                      <FaExternalLinkAlt className="w-4 h-4" />
                    </Button>
                    <Button
                      type="button"
                      variant="solid"
                      color="green-600"
                      title={translate('::App.Platform.View')}
                      onClick={() => setEditorComponentId(component.id)}
                    >
                      <FaCog className="w-4 h-4" />
                    </Button>
                    {canDelete && (
                      <Button
                        type="button"
                        variant="solid"
                        color="red-600"
                        title={translate('::App.Platform.Delete')}
                        onClick={() => handleDelete(component.id)}
                      >
                        <FaTrashAlt className="w-4 h-4" />
                      </Button>
                    )}
                  </div>
                </div>
              </div>
            </div>
          ))}
        </div>
      ) : (
        <div className="text-center py-12">
          <div className="mx-auto">
            <div className="bg-slate-100 rounded-full w-16 h-16 flex items-center justify-center mx-auto mb-4">
              <FaPlus className="w-8 h-8 text-slate-500" />
            </div>
            <h3 className="text-lg font-medium text-slate-900 mb-2">
              {searchTerm || filterActive !== 'all'
                ? translate('::App.EmptyFiltered.FilteredTitle')
                : translate('::App.EmptyInitial.InitialTitle')}
            </h3>
            <p className="text-slate-600 mb-6">
              {searchTerm || filterActive !== 'all'
                ? translate('::App.DeveloperKit.EmptyFilteredDescription')
                : translate('::App.EmptyInitial.InitialDescription')}
            </p>
            {canCreate && !searchTerm && filterActive === 'all' && (
              <button
                type="button"
                className="inline-flex items-center gap-2 bg-blue-600 text-white px-4 py-2 rounded-lg hover:bg-blue-700 transition-colors"
                onClick={() => setEditorComponentId(null)}
              >
                <FaPlus className="w-4 h-4" />
                {translate('::App.ComponentEditorTitle.Create')}
              </button>
            )}
          </div>
        </div>
      )}

      <Dialog
        isOpen={editorComponentId !== undefined}
        width={720}
        height="85vh"
        contentClassName="overflow-y-auto"
        onClose={() => setEditorComponentId(undefined)}
        onRequestClose={() => setEditorComponentId(undefined)}
      >
        <ComponentEditor
          key={editorComponentId ?? 'new'}
          componentId={editorComponentId}
          onClose={() => setEditorComponentId(undefined)}
          onSaved={refreshComponents}
        />
      </Dialog>
    </div>
  )
}

export default ComponentManager