"use client";

import { useState, useEffect } from "react";
import {
  Table,
  TableBody,
  TableCell,
  TableHead,
  TableHeader,
  TableRow,
} from "@/components/ui/table";
import { Button } from "@/components/ui/button";
import {
  Select,
  SelectContent,
  SelectItem,
  SelectTrigger,
  SelectValue,
} from "@/components/ui/select";
import {
  Eye,
  Loader,
  CheckCircle,
  XCircle,
  ChevronLeft,
  ChevronRight,
} from "lucide-react";
import Link from "next/link";
import { fetchWithAuthClient } from "@/lib/client-utils";
import { toast } from "sonner";

// ✅ Define Order Type
interface Order {
  _id: string;
  orderId: number;
  status: string;
  totalPrice: number;
  escrowExpiresAt: string;
  telegramUsername: string;
}

interface OrdersResponse {
  orders: Order[];
  page: number;
  totalPages: number;
}

export default function OrderTable() {
  const [orders, setOrders] = useState<Order[] | null>(null);
  const [loading, setLoading] = useState<boolean>(true);
  const [statusFilter, setStatusFilter] = useState<string>("all"); // ✅ Status Filter
  const [currentPage, setCurrentPage] = useState<number>(1);
  const [totalPages, setTotalPages] = useState<number>(1);

  // ✅ Fetch Orders with Pagination & Filtering
  useEffect(() => {
    const fetchOrders = async () => {
      try {
        setLoading(true);
        const query = new URLSearchParams({
          page: currentPage.toString(),
          limit: "10",
        });

        if (statusFilter !== "all") {
          query.append("status", statusFilter);
        }

        const response: OrdersResponse = await fetchWithAuthClient(
          `/orders?${query.toString()}`
        );

        if (response.orders) {
          setOrders(response.orders);
          setTotalPages(response.totalPages);
        } else {
          throw new Error("Invalid API response format");
        }
      } catch (error) {
        toast.error("Failed to fetch orders.");
        console.error("Error fetching orders:", error);
      } finally {
        setLoading(false);
      }
    };

    fetchOrders();
  }, [statusFilter, currentPage]);

  return (
    <div className="rounded-lg border dark:border-zinc-700 shadow-sm overflow-hidden">
      {/* ✅ Filtering UI */}
      <div className="p-4 flex justify-between items-center border-b dark:border-zinc-700">
        <h2 className="text-lg font-semibold text-gray-900 dark:text-white">
          Orders
        </h2>
        <Select value={statusFilter} onValueChange={setStatusFilter}>
          <SelectTrigger className="w-32">
            <SelectValue placeholder="Filter Status" />
          </SelectTrigger>
          <SelectContent>
            <SelectItem value="all">All</SelectItem>
            <SelectItem value="paid">Paid</SelectItem>
            <SelectItem value="unpaid">Unpaid</SelectItem>
            <SelectItem value="shipped">Shipped</SelectItem>
            <SelectItem value="completed">Completed</SelectItem>
          </SelectContent>
        </Select>
      </div>

      <Table>
        <TableHeader className="bg-gray-50 dark:bg-zinc-800/50">
          <TableRow>
            <TableHead className="w-[150px] text-center">Order ID</TableHead>{" "}
            {/* Center-aligned */}
            <TableHead className="text-center">Total (£)</TableHead>
            <TableHead className="text-center">Status</TableHead>
            <TableHead className="text-center">Buyer</TableHead>
            <TableHead className="text-right">Action</TableHead>
          </TableRow>
        </TableHeader>
        <TableBody>
          {loading ? (
            <TableRow>
              <TableCell colSpan={6} className="text-center py-4">
                <Loader className="h-5 w-5 animate-spin" />
              </TableCell>
            </TableRow>
          ) : orders && orders.length > 0 ? (
            orders.map((order) => (
              <TableRow
                key={order._id}
                className="transition-colors hover:bg-gray-50 dark:hover:bg-zinc-800/70"
              >
                <TableCell className="font-medium text-center">
                  #{order.orderId}
                </TableCell>
                <TableCell className="text-center">
                  £{order.totalPrice.toFixed(2)}
                </TableCell>
                <TableCell className="text-center">
                  {order.status === "paid" ? (
                    <div className="text-green-500 flex items-center justify-center">
                      <CheckCircle className="h-4 w-4 mr-1" /> Paid
                    </div>
                  ) : (
                    <div className="text-red-500 flex items-center justify-center">
                      <XCircle className="h-4 w-4 mr-1" /> {order.status}
                    </div>
                  )}
                </TableCell>
                <TableCell className="text-center">
                  @{order.telegramUsername}
                </TableCell>
                <TableCell className="text-right">
                  <Link href={`/dashboard/orders/${order._id}`}>
                    <Button size="sm" variant="ghost">
                      <Eye className="h-4 w-4" />
                    </Button>
                  </Link>
                </TableCell>
              </TableRow>
            ))
          ) : (
            <TableRow>
              <TableCell colSpan={6} className="h-24 text-center">
                No orders found.
              </TableCell>
            </TableRow>
          )}
        </TableBody>
      </Table>

      <div className="p-4 flex justify-between items-center border-t dark:border-zinc-700">
        <Button
          variant="outline"
          size="sm"
          disabled={currentPage === 1}
          onClick={() => setCurrentPage((prev) => Math.max(prev - 1, 1))}
        >
          <ChevronLeft className="h-4 w-4" /> Previous
        </Button>
        <span className="text-sm text-gray-500 dark:text-gray-400">
          Page {currentPage} of {totalPages}
        </span>
        <Button
          variant="outline"
          size="sm"
          disabled={currentPage >= totalPages}
          onClick={() => setCurrentPage((prev) => prev + 1)}
        >
          Next <ChevronRight className="h-4 w-4" />
        </Button>
      </div>
    </div>
  );
}