"use client";

import React, { useEffect, useState } from "react";
import Link from "next/link";
import Image from "next/image";
import { useRouter } from "next/navigation";

export default function ShopPage() {
  const [products, setProducts] = useState([]);
  const [loading, setLoading] = useState(true);
  const [error, setError] = useState(null);
  const [searchTerm, setSearchTerm] = useState("");
  const [currentPage, setCurrentPage] = useState(1);
  const [productsPerPage] = useState(10); // 每页显示的商品数量
  const [activeTab, setActiveTab] = useState("all"); // 新增的状态
  const router = useRouter();

  useEffect(() => {
    const fetchProducts = async () => {
      try {
        const res = await fetch("/api/products");
        if (!res.ok) {
          throw new Error("获取商品列表失败");
        }
        const data = await res.json();
        setProducts(data);
      } catch (err) {
        setError(err.message);
      } finally {
        setLoading(false);
      }
    };

    fetchProducts();
  }, []);

  const handleSearch = (e) => {
    setSearchTerm(e.target.value);
  };

  const filteredProducts = products.filter((product) =>
    product.title.toLowerCase().includes(searchTerm.toLowerCase())
  );

  const indexOfLastProduct = currentPage * productsPerPage;
  const indexOfFirstProduct = indexOfLastProduct - productsPerPage;
  const currentProducts = filteredProducts.slice(
    indexOfFirstProduct,
    indexOfLastProduct
  );

  const paginate = (pageNumber) => setCurrentPage(pageNumber);

  if (loading) return <div className="p-4">加载中...</div>;
  if (error) return <div className="p-4 text-red-500">错误: {error}</div>;

  return (
    <div className="p-4">
      <input
        type="text"
        placeholder="搜索商品"
        value={searchTerm}
        onChange={handleSearch}
        className="mb-4 p-2 border rounded w-full"
      />

      {/* 店铺信息 */}
      <Link href="/shop/profile" className="flex flex-row items-center">
        <Image
          src="https://s2.loli.net/2025/02/25/G1yo27THWhNC5uf.jpg" // 替换为实际的店铺头像路径
          alt="店铺头像"
          width={60}
          height={60}
          className="rounded-lg border-2 border-yellow-400 mr-4"
        />
        <div className="flex flex-col flex-1 justify-around items-start">
          <span className="text-lg font-semibold text-gray-800">
            宠物用品专卖店
          </span>
          <p className="text-yellow-700 bg-yellow-400 px-1 rounded">
            官方正品旗舰店{" >"}
          </p>
        </div>
      </Link>

      {/* Tab 切换栏 */}
      <div className="flex border-b mb-4">
        <button
          className={`flex-1 py-3 text-center ${
            activeTab === "all"
              ? "text-yellow-500 border-b-2 border-yellow-500"
              : "text-gray-500"
          }`}
          onClick={() => setActiveTab("all")}
        >
          宝贝
        </button>
        <button
          className={`flex-1 py-3 text-center ${
            activeTab === "new"
              ? "text-yellow-500 border-b-2 border-yellow-500"
              : "text-gray-500"
          }`}
          onClick={() => setActiveTab("new")}
        >
          新品
        </button>
      </div>

      <div
        className={`grid gap-4 ${
          activeTab === "all" ? "grid-cols-2" : "grid-cols-1"
        }`}
      >
        {currentProducts.map((product) => (
          <div
            key={product._id}
            className="bg-white rounded-lg shadow-md overflow-hidden"
          >
            <Link href={`/good/${product._id}`}>
              <div className="relative aspect-square">
                <Image
                  src={product.imageUrl}
                  alt={product.title}
                  fill
                  className="object-cover rounded-t-lg"
                />
              </div>
              <div className="p-4">
                <h3 className="text-lg truncate font-medium mt-2 line-clamp-2">
                  {product.title}
                </h3>
                <p className="text-red-500">¥{product.price}</p>
              </div>
            </Link>
          </div>
        ))}
      </div>
      <div className="flex justify-center mt-4">
        {[
          ...Array(Math.ceil(filteredProducts.length / productsPerPage)).keys(),
        ].map((number) => (
          <button
            key={number}
            onClick={() => paginate(number + 1)}
            className={`px-3 py-1 mx-1 ${
              currentPage === number + 1 ? "bg-yellow-400" : "bg-gray-200"
            }`}
          >
            {number + 1}
          </button>
        ))}
      </div>
    </div>
  );
}