'use client';

import DashboardLayout from '@/app/dashboard/layout';
import { Icons } from '@/components/icons';
import { useGlobalContext } from '@/context/Provider';
import { useEffect, useState, useRef, useCallback } from 'react';
import { useSearchParams } from 'next/navigation';
import SidebarModal from '@/components/rightSidebar/page';
import apis, { BUCKET_ROOT } from '@/utils/apis';
import dayjs from 'dayjs';
import { currency } from '@/lib/utils';

const CancelledOrder = () => {
  const { userInfo, setOrderInfo, orderInfo, activeModal, setActiveModal } =
    useGlobalContext();
  const searchParams = useSearchParams();

  const [orders, setOrders] = useState<any[]>([]);
  const [page, setPage] = useState(Number(searchParams.get('page')) || 1);
  const [loading, setLoading] = useState(false);
  const [hasMore, setHasMore] = useState(true);
  const limit = 15;

  const getOrders = async (currentPage: number, append = false) => {
    const status = searchParams.get('status') || 'cancelled';
    const restaurant_id = userInfo?.restaurant_id?._id;

    try {
      setLoading(true);
      const params = new URLSearchParams({
        status,
        page: currentPage.toString(),
        limit: limit.toString(),
        restaurant_id,
      });

      const apiRes = await apis.Orders.get(params.toString());
      const data = apiRes?.data || [];

      setOrders((prev) => (append ? [...prev, ...data] : data));
      setHasMore(data.length === limit);
    } catch (error) {
      console.error('Error fetching orders:', error);
    } finally {
      setLoading(false);
    }
  };

  useEffect(() => {
    if (userInfo?._id) {
      getOrders(page, false);
    }
  }, [userInfo]);

  const observer = useRef<IntersectionObserver | null>(null);
  const lastOrderRef = useCallback(
    (node: any) => {
      if (loading) return;
      if (observer.current) observer.current.disconnect();

      observer.current = new IntersectionObserver((entries) => {
        if (entries[0].isIntersecting && hasMore) {
          const nextPage = page + 1;
          setPage(nextPage);
          getOrders(nextPage, true);
        }
      });

      if (node) observer.current.observe(node);
    },
    [loading, hasMore, page]
  );

  return (
    <div className="h-[92vh] overflow-y-auto bg-gray-50 p-4">
      <div className="grid grid-cols-1 gap-6 md:grid-cols-2 lg:grid-cols-3">
        {orders?.map((item: any, index: number) => {
          const isLast = orders.length === index + 1;

          return (
            <div
              key={item?._id}
              ref={isLast ? lastOrderRef : null}
              className="
                rounded-xl
                bg-white
                shadow-md
                hover:shadow-lg
                transition
                cursor-pointer
              "
              onClick={() => {
                setActiveModal('orderDetail');
                setOrderInfo(item);
              }}
            >
              <div className="p-6 space-y-4">
                {/* Header */}
                <div className="flex justify-between items-start">
                  <div className="space-y-1">
                    <h3 className="text-[12px] font-[800] text-[#121212]">
                      #{item?.order_id}
                    </h3>
                    <span className="text-[10px] font-[500] text-[#808080]">
                      {dayjs(item.createdAt).format('DD MMM, hh:mm a')}
                    </span>
                  </div>
                  <div>
                    {item?.deliver_type === 'driver' ? (
                      <span className="bg-[#E6F7ED] text-[#219653] text-[10px] px-2 py-1 rounded-md font-[800] uppercase tracking-wider">
                        Driver
                      </span>
                    ) : (
                      <span className="bg-[#E8F1FF] text-[#2D9CDB] text-[10px] px-2 py-1 rounded-md font-[800] uppercase tracking-wider">
                        Take Away
                      </span>
                    )}
                  </div>
                </div>

                {/* Items */}
                <div className="space-y-3">
                  {[
                    ...(item?.cart_items || []),
                    ...(item?.grocery_cart_items || []),
                    ...(item?.other_cart_items || []),
                  ]
                    ?.slice(0, 2)
                    .map((cartItem: any, i: number) => (
                      <div key={i} className="flex items-center justify-between">
                        <div className="flex items-center gap-2">
                          <Icons.FoodTypeIcon type={cartItem.food_type} className="h-3.5 w-3.5 shrink-0" />
                          <span className="text-[14px] font-[600] text-[#121212] truncate max-w-[200px]">
                            {cartItem.no_of_quantity} x {cartItem.name}
                          </span>
                        </div>
                        <span className="text-[12px] font-[500] text-[#808080]">
                          {currency}{cartItem?.total_price !== undefined && cartItem?.total_price !== null ? cartItem.total_price : cartItem.price * cartItem.no_of_quantity}
                        </span>
                      </div>
                    ))}
                </div>

                {/* User */}
                <div className='pl-4 text-[var(--primary-brand)] text-sm'>
                  <p>
                    {item?.user_order_count} order by{' '}
                    {item?.add_receiver_detail?.name}
                  </p>
                </div>

                {/* Total */}
                <div className="flex items-center justify-between border-t border-gray-100 py-3">
                  <span className="text-[12px] font-[600] text-[#121212]">
                    Total Bill
                  </span>
                  <span className="text-[12px] font-[500] text-[var(--primary-brand)]">
                    {currency}{Number(item?.total_amount).toFixed(2)}
                  </span>
                </div>

                {/* Cancellation reason */}
                {item?.cancel_reason && (
                  <div className="mt-2 rounded-lg border border-red-200 bg-red-50 p-3">
                    <p className="text-[11px] font-[600] text-[#EB5757] mb-1">Cancellation Reason</p>
                    <p className="text-[12px] font-[500] text-[#333]">{item.cancel_reason}</p>
                  </div>
                )}
              </div>
            </div>
          );
        })}
      </div>
      {loading && (
        <p className="col-span-full text-center mt-4 text-gray-500">Loading more orders...</p>
      )}
      {orders.length === 0 && !loading && (
        <p className="col-span-full text-center mt-10 text-gray-500">No orders to show.</p>
      )}
      {activeModal && orderInfo && (
        <SidebarModal type={activeModal} onClose={() => setActiveModal('')} />
      )}
    </div>
  );
};

export default function CancelledOrderPage() {
  return (
    <DashboardLayout>
      <CancelledOrder />
    </DashboardLayout>
  );
}