"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 {
  DropdownMenu,
  DropdownMenuContent,
  DropdownMenuItem,
  DropdownMenuTrigger,
} from "@/components/ui/dropdown-menu";
import {
  AlertDialog,
  AlertDialogAction,
  AlertDialogCancel,
  AlertDialogContent,
  AlertDialogDescription,
  AlertDialogFooter,
  AlertDialogHeader,
  AlertDialogTitle,
} from "@/components/ui/alert-dialog";
import AdminUsersService from "@/services/admin.users.service";
import type { User } from "@/types/auth.type";
import {
  Plus,
  Search,
  MoreHorizontal,
  Edit,
  Trash,
  ChevronLeft,
  ChevronRight,
  User as UserIcon,
  Shield,
} from "lucide-react";

const UsersListPage = () => {
  const [sorting, setSorting] = useState<SortingState>([]);
  const [globalFilter, setGlobalFilter] = useState("");
  const [deleteDialogOpen, setDeleteDialogOpen] = useState(false);
  const [userToDelete, setUserToDelete] = useState<User | null>(null);

  const { data: users = [], isLoading, mutate } = useSWR<User[]>(
    "/admin/users",
    async () => {
      const response = await AdminUsersService.getAll();
      return response.data || [];
    }
  );

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

    try {
      await AdminUsersService.delete(userToDelete.id);
      toast.success("User berhasil dihapus");
      mutate();
    } catch (error) {
      toast.error("Gagal menghapus user");
    } finally {
      setDeleteDialogOpen(false);
      setUserToDelete(null);
    }
  };

  const columns: ColumnDef<User>[] = [
    {
      accessorKey: "username",
      header: "Username",
      cell: ({ row }) => (
        <div className="flex items-center gap-3">
          <div className="h-10 w-10 rounded-full bg-slate-100 flex items-center justify-center">
            <UserIcon className="h-5 w-5 text-slate-500" />
          </div>
          <div>
            <p className="font-medium">{row.original.username}</p>
            <p className="text-sm text-slate-500">{row.original.id}</p>
          </div>
        </div>
      ),
    },
    {
      accessorKey: "role",
      header: "Role",
      cell: ({ row }) => (
        <div className="flex items-center gap-2">
          <Shield className="h-4 w-4 text-slate-500" />
          <Badge
            variant={row.original.role === "ADMIN" ? "default" : "secondary"}
            className={row.original.role === "ADMIN" ? "bg-blue-500" : ""}
          >
            {row.original.role}
          </Badge>
        </div>
      ),
    },
    {
      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={`/admin/users/${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={() => {
                setUserToDelete(row.original);
                setDeleteDialogOpen(true);
              }}
            >
              <Trash className="h-4 w-4 mr-2" />
              Hapus
            </DropdownMenuItem>
          </DropdownMenuContent>
        </DropdownMenu>
      ),
    },
  ];

  const table = useReactTable({
    data: users,
    columns,
    getCoreRowModel: getCoreRowModel(),
    getPaginationRowModel: getPaginationRowModel(),
    getSortedRowModel: getSortedRowModel(),
    onSortingChange: setSorting,
    state: {
      sorting,
      globalFilter,
    },
    globalFilterFn: (row, columnId, filterValue) => {
      const value = row.getValue(columnId);
      return String(value).toLowerCase().includes(filterValue.toLowerCase());
    },
  });

  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 Users</h1>
          <p className="text-slate-500">Kelola admin users dan akses</p>
        </div>
        <Link href="/admin/users/new">
          <Button>
            <Plus className="h-4 w-4 mr-2" />
            Tambah User
          </Button>
        </Link>
      </div>

      {/* Search */}
      <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 user..."
            value={globalFilter}
            onChange={(e) => setGlobalFilter(e.target.value)}
            className="pl-9"
          />
        </div>
      </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 user.
                </TableCell>
              </TableRow>
            )}
          </TableBody>
        </Table>
      </div>

      {/* Pagination */}
      <div className="flex items-center justify-between">
        <p className="text-sm text-slate-500">
          Menampilkan {table.getState().pagination.pageIndex + 1} dari {table.getPageCount()} halaman
        </p>
        <div className="flex items-center gap-2">
          <Button
            variant="outline"
            size="sm"
            onClick={() => table.previousPage()}
            disabled={!table.getCanPreviousPage()}
          >
            <ChevronLeft className="h-4 w-4" />
          </Button>
          <Button
            variant="outline"
            size="sm"
            onClick={() => table.nextPage()}
            disabled={!table.getCanNextPage()}
          >
            <ChevronRight className="h-4 w-4" />
          </Button>
        </div>
      </div>

      {/* Delete Confirmation Dialog */}
      <AlertDialog open={deleteDialogOpen} onOpenChange={setDeleteDialogOpen}>
        <AlertDialogContent>
          <AlertDialogHeader>
            <AlertDialogTitle>Hapus User</AlertDialogTitle>
            <AlertDialogDescription>
              Apakah Anda yakin ingin menghapus user "{userToDelete?.username}"? 
              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 UsersListPage;