"use client";

import { useState } from "react";
import Link from "next/link";
import useSWR from "swr";
import {
  ColumnDef,
  flexRender,
  getCoreRowModel,
  getPaginationRowModel,
  getSortedRowModel,
  SortingState,
  useReactTable,
} from "@tanstack/react-table";
import { toast } from "sonner";
import {
  Table,
  TableBody,
  TableCell,
  TableHead,
  TableHeader,
  TableRow,
} from "@/components/ui/table";
import { Button } from "@/components/ui/button";
import { Input } from "@/components/ui/input";
import { Badge } from "@/components/ui/badge";
import { Avatar, AvatarFallback, AvatarImage } from "@/components/ui/avatar";
import {
  Select,
  SelectContent,
  SelectItem,
  SelectTrigger,
  SelectValue,
} from "@/components/ui/select";
import {
  DropdownMenu,
  DropdownMenuContent,
  DropdownMenuItem,
  DropdownMenuTrigger,
} from "@/components/ui/dropdown-menu";
import {
  AlertDialog,
  AlertDialogAction,
  AlertDialogCancel,
  AlertDialogContent,
  AlertDialogDescription,
  AlertDialogFooter,
  AlertDialogHeader,
  AlertDialogTitle,
} from "@/components/ui/alert-dialog";
import NewsService from "@/services/news.service";
import AdminNewsService from "@/services/admin.news.service";
import type { News, Category } from "@/types/news.type";
import {
  Plus,
  Search,
  MoreHorizontal,
  Edit,
  Trash,
  Eye,
  ChevronLeft,
  ChevronRight,
  Star,
} from "lucide-react";

const statusLabels: Record<string, string> = {
  DRAFT: "Draft",
  PUBLISHED: "Published",
  ARCHIVED: "Archived",
};

const statusColors: Record<string, string> = {
  DRAFT: "bg-yellow-500",
  PUBLISHED: "bg-green-500",
  ARCHIVED: "bg-gray-500",
};

const NewsListPage = () => {
  const [sorting, setSorting] = useState<SortingState>([]);
  const [globalFilter, setGlobalFilter] = useState("");
  const [statusFilter, setStatusFilter] = useState<string>("ALL");
  const [categoryFilter, setCategoryFilter] = useState<string>("ALL");
  const [deleteDialogOpen, setDeleteDialogOpen] = useState(false);
  const [newsToDelete, setNewsToDelete] = useState<News | null>(null);
  const [page, setPage] = useState(1);
  const [limit] = useState(10);

  const { data: newsData, isLoading, mutate } = useSWR(
    `/admin/news?page=${page}&limit=${limit}&status=${statusFilter}`,
    async () => {
      const response = await AdminNewsService.getAllForAdmin({ 
        page, 
        limit, 
        status: statusFilter === "ALL" ? undefined : statusFilter 
      });
      return response;
    }
  );

  const { data: categories = [] } = useSWR<Category[]>(
    "/admin/news/categories",
    () => NewsService.getCategories()
  );

  const handleDelete = async () => {
    if (!newsToDelete) return;

    try {
      await AdminNewsService.delete(newsToDelete.id);
      toast.success("Berita berhasil dihapus");
      mutate();
    } catch (error) {
      toast.error("Gagal menghapus berita");
    } finally {
      setDeleteDialogOpen(false);
      setNewsToDelete(null);
    }
  };

  const news = newsData?.news || [];

  const columns: ColumnDef<News>[] = [
    {
      accessorKey: "imageUrl",
      header: "Gambar",
      cell: ({ row }) => (
        <Avatar className="h-12 w-12 rounded-lg">
          <AvatarImage src={row.original.imageUrl || ""} alt={row.original.title} />
          <AvatarFallback className="rounded-lg text-xs">IMG</AvatarFallback>
        </Avatar>
      ),
    },
    {
      accessorKey: "title",
      header: "Judul",
      cell: ({ row }) => (
        <div>
          <div className="flex items-center gap-2">
            <p className="font-medium line-clamp-1">{row.original.title}</p>
            {row.original.isFeatured && (
              <Star className="h-4 w-4 fill-yellow-400 text-yellow-400" />
            )}
          </div>
          <p className="text-sm text-slate-500 line-clamp-1">
            {row.original.excerpt}
          </p>
        </div>
      ),
    },
    {
      accessorKey: "category",
      header: "Kategori",
      cell: ({ row }) => (
        <Badge variant="secondary">{row.original.category?.name || "-"}</Badge>
      ),
    },
    {
      accessorKey: "status",
      header: "Status",
      cell: ({ row }) => (
        <Badge
          className={statusColors[row.original.status] || "bg-gray-500"}
        >
          {statusLabels[row.original.status] || row.original.status}
        </Badge>
      ),
    },
    {
      accessorKey: "viewCount",
      header: "Views",
      cell: ({ row }) => (
        <span className="text-sm text-slate-500">
          {row.original.viewCount.toLocaleString()}
        </span>
      ),
    },
    {
      id: "actions",
      header: "Aksi",
      cell: ({ row }) => (
        <DropdownMenu>
          <DropdownMenuTrigger>
            <Button variant="ghost" size="icon">
              <MoreHorizontal className="h-4 w-4" />
            </Button>
          </DropdownMenuTrigger>
          <DropdownMenuContent align="end">
            <DropdownMenuItem>
              <Link href={`/berita/${row.original.slug}`} target="_blank" className="flex items-center">
                <Eye className="h-4 w-4 mr-2" />
                Lihat
              </Link>
            </DropdownMenuItem>
            <DropdownMenuItem>
              <Link href={`/admin/news/${row.original.id}/edit`} className="flex items-center">
                <Edit className="h-4 w-4 mr-2" />
                Edit
              </Link>
            </DropdownMenuItem>
            <DropdownMenuItem
              className="text-red-600"
              onClick={() => {
                setNewsToDelete(row.original);
                setDeleteDialogOpen(true);
              }}
            >
              <Trash className="h-4 w-4 mr-2" />
              Hapus
            </DropdownMenuItem>
          </DropdownMenuContent>
        </DropdownMenu>
      ),
    },
  ];

  const table = useReactTable({
    data: news,
    columns,
    getCoreRowModel: getCoreRowModel(),
    getPaginationRowModel: getPaginationRowModel(),
    getSortedRowModel: getSortedRowModel(),
    onSortingChange: setSorting,
    state: {
      sorting,
      globalFilter,
    },
    manualPagination: true,
    pageCount: newsData?.pagination?.totalPages || 1,
  });

  return (
    <div className="space-y-4">
      {/* Header */}
      <div className="flex items-center justify-between">
        <div>
          <h1 className="text-2xl font-bold text-slate-900">Kelola Berita</h1>
          <p className="text-slate-500">Kelola artikel dan konten berita</p>
        </div>
        <Link href="/admin/news/new">
          <Button>
            <Plus className="h-4 w-4 mr-2" />
            Tambah Berita
          </Button>
        </Link>
      </div>

      {/* Filters */}
      <div className="flex items-center gap-2">
        <div className="relative flex-1 max-w-sm">
          <Search className="absolute left-3 top-1/2 h-4 w-4 -translate-y-1/2 text-slate-500" />
          <Input
            placeholder="Cari berita..."
            value={globalFilter}
            onChange={(e) => setGlobalFilter(e.target.value)}
            className="pl-9"
          />
        </div>

        <Select
          value={statusFilter}
          onValueChange={(value) => setStatusFilter(value || "ALL")}
        >
          <SelectTrigger className="w-40">
            <SelectValue placeholder="Filter status" />
          </SelectTrigger>
          <SelectContent>
            <SelectItem value="ALL">Semua Status</SelectItem>
            <SelectItem value="DRAFT">Draft</SelectItem>
            <SelectItem value="PUBLISHED">Published</SelectItem>
            <SelectItem value="ARCHIVED">Archived</SelectItem>
          </SelectContent>
        </Select>

        <Select
          value={categoryFilter}
          onValueChange={(value) => setCategoryFilter(value || "ALL")}
        >
          <SelectTrigger className="w-40">
            <SelectValue placeholder="Filter kategori" />
          </SelectTrigger>
          <SelectContent>
            <SelectItem value="ALL">Semua Kategori</SelectItem>
            {categories.map((cat) => (
              <SelectItem key={cat.id} value={cat.id}>
                {cat.name}
              </SelectItem>
            ))}
          </SelectContent>
        </Select>
      </div>

      {/* Table */}
      <div className="rounded-md border">
        <Table>
          <TableHeader>
            {table.getHeaderGroups().map((headerGroup) => (
              <TableRow key={headerGroup.id}>
                {headerGroup.headers.map((header) => (
                  <TableHead key={header.id}>
                    {header.isPlaceholder
                      ? null
                      : flexRender(header.column.columnDef.header, header.getContext())}
                  </TableHead>
                ))}
              </TableRow>
            ))}
          </TableHeader>
          <TableBody>
            {isLoading ? (
              <TableRow>
                <TableCell colSpan={columns.length} className="h-24 text-center">
                  Memuat data...
                </TableCell>
              </TableRow>
            ) : table.getRowModel().rows?.length ? (
              table.getRowModel().rows.map((row) => (
                <TableRow key={row.id} data-state={row.getIsSelected() && "selected"}>
                  {row.getVisibleCells().map((cell) => (
                    <TableCell key={cell.id}>
                      {flexRender(cell.column.columnDef.cell, cell.getContext())}
                    </TableCell>
                  ))}
                </TableRow>
              ))
            ) : (
              <TableRow>
                <TableCell colSpan={columns.length} className="h-24 text-center">
                  Tidak ada data berita.
                </TableCell>
              </TableRow>
            )}
          </TableBody>
        </Table>
      </div>

      {/* Pagination */}
      <div className="flex items-center justify-between">
        <p className="text-sm text-slate-500">
          Menampilkan {news.length} dari {newsData?.pagination?.total || 0} berita
        </p>
        <div className="flex items-center gap-2">
          <Button
            variant="outline"
            size="sm"
            onClick={() => setPage((p) => Math.max(1, p - 1))}
            disabled={page === 1}
          >
            <ChevronLeft className="h-4 w-4" />
          </Button>
          <span className="text-sm text-slate-500">
            Halaman {page} dari {newsData?.pagination?.totalPages || 1}
          </span>
          <Button
            variant="outline"
            size="sm"
            onClick={() => setPage((p) => p + 1)}
            disabled={page >= (newsData?.pagination?.totalPages || 1)}
          >
            <ChevronRight className="h-4 w-4" />
          </Button>
        </div>
      </div>

      {/* Delete Confirmation Dialog */}
      <AlertDialog open={deleteDialogOpen} onOpenChange={setDeleteDialogOpen}>
        <AlertDialogContent>
          <AlertDialogHeader>
            <AlertDialogTitle>Hapus Berita</AlertDialogTitle>
            <AlertDialogDescription>
              Apakah Anda yakin ingin menghapus berita &quot;{newsToDelete?.title}&quot;? 
              Tindakan ini tidak dapat dibatalkan.
            </AlertDialogDescription>
          </AlertDialogHeader>
          <AlertDialogFooter>
            <AlertDialogCancel>Batal</AlertDialogCancel>
            <AlertDialogAction onClick={handleDelete} className="bg-red-600 hover:bg-red-700">
              Hapus
            </AlertDialogAction>
          </AlertDialogFooter>
        </AlertDialogContent>
      </AlertDialog>
    </div>
  );
};

export default NewsListPage;