import { startTransition, useDeferredValue, useState } from 'react'
import { useMutation, useQuery, useQueryClient } from '@tanstack/react-query'
import { useNavigate } from '@tanstack/react-router'
import {
  ChevronLeft,
  ChevronRight,
  FilterX,
  Loader2,
  PencilLine,
  Plus,
  RefreshCw,
  Search,
  Trash2,
} from 'lucide-react'
import { toast } from 'sonner'
import { TableImagePreview } from '@/components/table-image-preview'
import {
  deleteAnnouncement,
  fetchAnnouncements,
} from '@/lib/api/announcements'
import type { AdminAnnouncementRecord } from '@/lib/api/types'
import { handleServerError } from '@/lib/handle-server-error'
import { getPageNumbers } from '@/lib/utils'
import { Badge } from '@/components/ui/badge'
import { Button } from '@/components/ui/button'
import {
  Card,
  CardContent,
  CardDescription,
  CardHeader,
  CardTitle,
} from '@/components/ui/card'
import { Input } from '@/components/ui/input'
import {
  Select,
  SelectContent,
  SelectItem,
  SelectTrigger,
  SelectValue,
} from '@/components/ui/select'
import {
  Table,
  TableBody,
  TableCell,
  TableHead,
  TableHeader,
  TableRow,
} from '@/components/ui/table'
import { ConfirmDialog } from '@/components/confirm-dialog'
import { Main } from '@/components/layout/main'
import { AnnouncementsHeader } from './components/announcements-header'

const perPage = 10

export function AnnouncementsPage() {
  const navigate = useNavigate()
  const queryClient = useQueryClient()
  const [page, setPage] = useState(1)
  const [search, setSearch] = useState('')
  const deferredSearch = useDeferredValue(search)
  const [categoryFilter, setCategoryFilter] = useState('all')
  const [featuredFilter, setFeaturedFilter] = useState('all')
  const [announcementToDelete, setAnnouncementToDelete] =
    useState<AdminAnnouncementRecord | null>(null)

  const hasActiveFilters = categoryFilter !== 'all' || featuredFilter !== 'all'

  const announcementsQuery = useQuery({
    queryKey: ['announcements', page, deferredSearch, categoryFilter, featuredFilter],
    queryFn: () =>
      fetchAnnouncements({
        page,
        perPage,
        search: deferredSearch || undefined,
        category: categoryFilter !== 'all' ? categoryFilter : undefined,
        featured: featuredFilter !== 'all' ? featuredFilter : undefined,
      }),
  })

  const deleteMutation = useMutation({
    mutationFn: async (id: number | string) => deleteAnnouncement(id),
    onSuccess: async () => {
      toast.success('Duyuru silindi')
      await queryClient.invalidateQueries({ queryKey: ['announcements'] })
      setAnnouncementToDelete(null)
    },
    onError: handleServerError,
  })

  const pageNumbers = getPageNumbers(
    page,
    announcementsQuery.data?.meta.lastPage ?? 1
  )

  const categoryLabel: Record<string, string> = {
    announcement: 'Duyuru',
    news: 'Haber',
    event: 'Etkinlik',
  }

  return (
    <>
      <AnnouncementsHeader />

      <Main className='space-y-6'>
        <Card>
          <CardHeader className='gap-4'>
            <div className='flex flex-col gap-4 xl:flex-row xl:items-start xl:justify-between'>
              <div>
                <CardTitle>Duyurular</CardTitle>
                <CardDescription>
                  Duyuru, haber ve etkinlik içerikleri.
                </CardDescription>
              </div>
              <div className='flex flex-wrap gap-2'>
                <Button
                  variant='outline'
                  className='rounded-xl'
                  onClick={() => announcementsQuery.refetch()}
                >
                  <RefreshCw
                    className={
                      announcementsQuery.isFetching ? 'animate-spin' : ''
                    }
                  />
                  Yenile
                </Button>
                <Button
                  className='rounded-xl'
                  onClick={() => navigate({ to: '/announcements/create' })}
                >
                  <Plus />
                  Ekle
                </Button>
              </div>
            </div>

            <div className='rounded-2xl border border-dashed border-border/70 bg-muted/20 p-4'>
              <div className='flex flex-wrap items-center gap-3'>
                <div className='relative max-w-sm flex-1'>
                  <Search className='absolute top-1/2 left-3 size-4 -translate-y-1/2 text-muted-foreground' />
                  <Input
                    placeholder='Duyuru ara...'
                    className='pl-9'
                    value={search}
                    onChange={(event) => {
                      setSearch(event.target.value)
                      setPage(1)
                    }}
                  />
                </div>
                <Select
                  value={categoryFilter}
                  onValueChange={(value) => {
                    setCategoryFilter(value)
                    setPage(1)
                  }}
                >
                  <SelectTrigger className='w-40'>
                    <SelectValue placeholder='Kategori' />
                  </SelectTrigger>
                  <SelectContent>
                    <SelectItem value='all'>Tümü</SelectItem>
                    <SelectItem value='announcement'>Duyuru</SelectItem>
                    <SelectItem value='news'>Haber</SelectItem>
                    <SelectItem value='event'>Etkinlik</SelectItem>
                  </SelectContent>
                </Select>
                <Select
                  value={featuredFilter}
                  onValueChange={(value) => {
                    setFeaturedFilter(value)
                    setPage(1)
                  }}
                >
                  <SelectTrigger className='w-40'>
                    <SelectValue placeholder='Manşet' />
                  </SelectTrigger>
                  <SelectContent>
                    <SelectItem value='all'>Tümü</SelectItem>
                    <SelectItem value='true'>Öne Çıkan</SelectItem>
                    <SelectItem value='false'>Normal</SelectItem>
                  </SelectContent>
                </Select>
                {hasActiveFilters && (
                  <Button
                    variant='ghost'
                    size='sm'
                    className='h-9 rounded-xl text-muted-foreground'
                    onClick={() => {
                      setCategoryFilter('all')
                      setFeaturedFilter('all')
                      setPage(1)
                    }}
                  >
                    <FilterX className='size-4' />
                    Filtreleri temizle
                  </Button>
                )}
              </div>
            </div>
          </CardHeader>
          <CardContent className='space-y-4'>
            <div className='rounded-2xl border border-border/70'>
              <Table>
                <TableHeader>
                  <TableRow>
                    <TableHead className='w-16 px-4'>Görsel</TableHead>
                    <TableHead>Başlık</TableHead>
                    <TableHead>Kategori</TableHead>
                    <TableHead>Manşet</TableHead>
                    <TableHead>Yayın Tarihi</TableHead>
                    <TableHead className='w-[180px] text-right'>
                      İşlemler
                    </TableHead>
                  </TableRow>
                </TableHeader>
                <TableBody>
                  {announcementsQuery.isLoading ? (
                    <TableRow>
                      <TableCell
                        colSpan={6}
                        className='h-28 text-center text-muted-foreground'
                      >
                        <Loader2 className='mx-auto mb-2 size-5 animate-spin' />
                        Yükleniyor...
                      </TableCell>
                    </TableRow>
                  ) : announcementsQuery.data?.items.length ? (
                    announcementsQuery.data.items.map((item) => (
                      <TableRow key={item.id}>
                        <TableCell className='px-4'>
                          <TableImagePreview src={item.image} alt={item.title} />
                        </TableCell>
                        <TableCell className='px-4 py-4'>
                          <p className='font-medium text-foreground'>
                            {item.title}
                          </p>
                        </TableCell>
                        <TableCell>
                          <Badge variant='outline' className='rounded-full'>
                            {categoryLabel[item.category] ?? item.category}
                          </Badge>
                        </TableCell>
                        <TableCell>
                          {item.isFeatured ? (
                            <Badge className='rounded-full'>Manşet</Badge>
                          ) : (
                            <span className='text-sm text-muted-foreground'>
                              -
                            </span>
                          )}
                        </TableCell>
                        <TableCell className='text-sm text-muted-foreground'>
                          {item.publishedAt
                            ? new Date(item.publishedAt).toLocaleDateString(
                                'tr-TR'
                              )
                            : '-'}
                        </TableCell>
                        <TableCell>
                          <div className='flex justify-end gap-2'>
                            <Button
                              variant='outline'
                              size='sm'
                              className='rounded-xl'
                              onClick={() =>
                                navigate({
                                  to: '/announcements/$announcementId',
                                  params: { announcementId: String(item.id) },
                                })
                              }
                            >
                              <PencilLine />
                              Düzenle
                            </Button>
                            <Button
                              variant='destructive'
                              size='sm'
                              className='rounded-xl'
                              onClick={() => setAnnouncementToDelete(item)}
                            >
                              <Trash2 />
                              Sil
                            </Button>
                          </div>
                        </TableCell>
                      </TableRow>
                    ))
                  ) : (
                    <TableRow>
                      <TableCell
                        colSpan={6}
                        className='h-28 text-center text-muted-foreground'
                      >
                        Duyuru bulunamadı.
                      </TableCell>
                    </TableRow>
                  )}
                </TableBody>
              </Table>
            </div>

            <div className='flex flex-col gap-4 sm:flex-row sm:items-center sm:justify-between'>
              <p className='text-sm text-muted-foreground'>
                Toplam {announcementsQuery.data?.meta.total ?? 0} kayıt. Sayfa{' '}
                {page} / {announcementsQuery.data?.meta.lastPage ?? 1}
              </p>
              <div className='flex flex-wrap items-center gap-2'>
                <Button
                  variant='outline'
                  size='sm'
                  onClick={() =>
                    startTransition(() => setPage((c) => Math.max(1, c - 1)))
                  }
                  disabled={page === 1}
                >
                  <ChevronLeft />
                </Button>
                {pageNumbers.map((item, index) =>
                  item === '...' ? (
                    <span
                      key={`${item}-${index}`}
                      className='px-2 text-sm text-muted-foreground'
                    >
                      ...
                    </span>
                  ) : (
                    <Button
                      key={item}
                      size='sm'
                      variant={item === page ? 'default' : 'outline'}
                      onClick={() =>
                        startTransition(() => setPage(Number(item)))
                      }
                    >
                      {item}
                    </Button>
                  )
                )}
                <Button
                  variant='outline'
                  size='sm'
                  onClick={() =>
                    startTransition(() =>
                      setPage((c) =>
                        Math.min(
                          announcementsQuery.data?.meta.lastPage ?? 1,
                          c + 1
                        )
                      )
                    )
                  }
                  disabled={
                    page === (announcementsQuery.data?.meta.lastPage ?? 1)
                  }
                >
                  <ChevronRight />
                </Button>
              </div>
            </div>
          </CardContent>
        </Card>
      </Main>

      <ConfirmDialog
        open={!!announcementToDelete}
        onOpenChange={(open) => {
          if (!open) setAnnouncementToDelete(null)
        }}
        title='Duyuruyu silmek istediğinize emin misiniz?'
        desc={`"${announcementToDelete?.title ?? ''}" kalıcı olarak silinecek.`}
        confirmText='Evet, sil'
        cancelBtnText='İptal'
        destructive
        isLoading={deleteMutation.isPending}
        handleConfirm={() => {
          if (announcementToDelete) {
            deleteMutation.mutate(announcementToDelete.id)
          }
        }}
      />
    </>
  )
}
