import { useMutation, useQuery, useQueryClient } from '@tanstack/react-query'
import { useState } from 'react'
import { useTranslation } from 'react-i18next'
import { AlertTriangle } from 'lucide-react'
import { HttpError } from '@/shared/api/client'
import { Button } from '@/shared/ui/button'
import { Card, CardContent, CardDescription, CardHeader, CardTitle } from '@/shared/ui/card'
import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from '@/shared/ui/select'
import { toast } from '@/shared/ui/toast-store'
import { listShows } from '@/features/admin/shows/api'
import { clearAllMedia, deleteAllShows, deleteShowMedia } from './api'

export function MaintenancePanel() {
  const { t } = useTranslation()
  const queryClient = useQueryClient()
  const [showId, setShowId] = useState('')

  const { data: shows } = useQuery({ queryKey: ['admin', 'shows'], queryFn: () => listShows() })

  const onError = (error: unknown) =>
    toast.error(error instanceof HttpError ? error.detail : t('common.error'))

  // Затрагиваются медиа/шоу/каналы — сбрасываем все связанные кэши.
  const invalidateAll = () => {
    for (const key of [['admin', 'media'], ['admin', 'shows'], ['admin', 'channels']])
      void queryClient.invalidateQueries({ queryKey: key })
  }

  const clearMedia = useMutation({
    mutationFn: clearAllMedia,
    onSuccess: (count) => {
      toast.success(t('admin.maintenance.doneCount', { count }))
      invalidateAll()
    },
    onError,
  })

  const clearShows = useMutation({
    mutationFn: deleteAllShows,
    onSuccess: (count) => {
      toast.success(t('admin.maintenance.doneCount', { count }))
      invalidateAll()
    },
    onError,
  })

  const clearShowMedia = useMutation({
    mutationFn: () => deleteShowMedia(showId),
    onSuccess: (count) => {
      setShowId('')
      toast.success(t('admin.maintenance.doneCount', { count }))
      invalidateAll()
    },
    onError,
  })

  const confirmed = (message: string, run: () => void) => {
    if (window.confirm(message)) run()
  }

  return (
    <div className="flex flex-col gap-4">
      <div className="flex items-center gap-2">
        <AlertTriangle className="h-5 w-5 text-red-500" />
        <h2 className="crt-glow text-xl font-semibold">{t('admin.maintenance.title')}</h2>
      </div>
      <p className="text-sm text-muted-foreground">{t('admin.maintenance.warning')}</p>

      <Card>
        <CardHeader>
          <CardTitle>{t('admin.maintenance.clearMedia')}</CardTitle>
          <CardDescription>{t('admin.maintenance.clearMediaHint')}</CardDescription>
        </CardHeader>
        <CardContent>
          <Button
            variant="destructive"
            disabled={clearMedia.isPending}
            onClick={() => confirmed(t('admin.maintenance.confirmClearMedia'), () => clearMedia.mutate())}
          >
            {t('admin.maintenance.clearMedia')}
          </Button>
        </CardContent>
      </Card>

      <Card>
        <CardHeader>
          <CardTitle>{t('admin.maintenance.clearShowMedia')}</CardTitle>
          <CardDescription>{t('admin.maintenance.clearShowMediaHint')}</CardDescription>
        </CardHeader>
        <CardContent className="flex flex-wrap items-center gap-2">
          <Select value={showId} onValueChange={setShowId}>
            <SelectTrigger className="max-w-xs">
              <SelectValue placeholder={t('admin.maintenance.pickShow')} />
            </SelectTrigger>
            <SelectContent>
              {shows?.map((s) => (
                <SelectItem key={s.id} value={s.id}>
                  {s.name}
                </SelectItem>
              ))}
            </SelectContent>
          </Select>
          <Button
            variant="destructive"
            disabled={!showId || clearShowMedia.isPending}
            onClick={() =>
              confirmed(t('admin.maintenance.confirmClearShowMedia'), () => clearShowMedia.mutate())
            }
          >
            {t('admin.maintenance.clearShowMedia')}
          </Button>
        </CardContent>
      </Card>

      <Card>
        <CardHeader>
          <CardTitle>{t('admin.maintenance.deleteShows')}</CardTitle>
          <CardDescription>{t('admin.maintenance.deleteShowsHint')}</CardDescription>
        </CardHeader>
        <CardContent>
          <Button
            variant="destructive"
            disabled={clearShows.isPending}
            onClick={() => confirmed(t('admin.maintenance.confirmDeleteShows'), () => clearShows.mutate())}
          >
            {t('admin.maintenance.deleteShows')}
          </Button>
        </CardContent>
      </Card>
    </div>
  )
}