import React, { useState, useEffect } from "react";
import { MetaFunction } from "@remix-run/node";
import { Link, useNavigate, useParams } from "@remix-run/react";
import { onSearch } from "../utils/helpers";
import { PackageSearch } from "lucide-react";
import { useSearchInfinite } from "../requestHandler/use-search-hooks";
import MondrianProductList from "~/components/MondrianProductList";
import SearchTopBar from "~/components/SearchTopBar";
import SellerLogo from "~/components/SellerLogo";
import HorizontalCollectionsList from "~/components/HorizontalCollectionsList";

export default function Search() {
  const { query } = useParams();
  const navigate = useNavigate();
  const [searchValue, setSearchValue] = useState(query || "");

  // Update search value when route parameter changes
  useEffect(() => {
    if (query) {
      setSearchValue(query);
    }
  }, [query]);

  // Use infinite search hook to fetch data, passing the route query parameter
  const {
    data,
    isLoading,
    isError,
    refetch,
    fetchNextPage,
    hasNextPage,
    isFetchingNextPage,
  } = useSearchInfinite(query);

  // Sellers & collections are the same for every page of a query, so read them
  // off the first page. Products paginate as usual.
  const firstPage = data?.pages?.[0];
  const sellers = firstPage?.sellers ?? [];
  const collections = firstPage?.collections ?? [];
  const hasNonProduct = sellers.length > 0 || collections.length > 0;

  return (
    <div className="flex flex-col gap-6 bg-WHITE lg:max-w-[1320px] lg:mx-auto lg:w-full lg:px-8 lg:py-6">
      <div className="lg:hidden">
        <SearchTopBar
          searchValue={searchValue}
          setSearchValue={setSearchValue}
          placeholder="جستجو..."
          minimumPrice={320000}
          maximumPrice={1000000}
          onSearch={() => onSearch(searchValue, navigate)}
        />
      </div>

      {/* Desktop results heading */}
      <div className="hidden lg:block">
        <nav className="flex items-center gap-2 text-[13px] text-GRAY">
          <Link to="/" className="hover:text-BLACK">
            خانه
          </Link>
          <span>/</span>
          <span>جستجو</span>
        </nav>
        <h1 className="text-[26px] font-extrabold mt-2">
          نتایج برای «<span className="text-VITROWN_BLUE">{query}</span>»
        </h1>
      </div>

      {/* Sellers */}
      {sellers.length > 0 && (
        <section className="flex flex-col gap-3">
          <p className="text-B16 lg:text-B24 font-bold px-4 lg:px-0">فروشگاه‌ها</p>
          <div className="flex gap-4 overflow-x-auto px-4 lg:px-0 pb-1">
            {sellers.map((seller) => (
              <Link
                key={seller.id}
                to={`/seller/${seller.id}`}
                className="flex flex-col items-center gap-2 shrink-0 w-[76px]"
              >
                <SellerLogo src={seller.logo} alt={seller.name} size="xl" />
                <p className="text-R12 font-bold text-center line-clamp-1 w-full">
                  {seller.name}
                </p>
              </Link>
            ))}
          </div>
        </section>
      )}

      {/* Collections */}
      {collections.length > 0 && (
        <section className="flex flex-col gap-3">
          <p className="text-B16 lg:text-B24 font-bold px-4 lg:px-0">کالکشن‌ها</p>
          <HorizontalCollectionsList
            collections={collections.map((c) => ({
              id: c.id,
              title: c.title,
              coverImageUrl: c.coverImageUrl,
              productCount: c.productCount,
            }))}
            isLoading={false}
            isError={false}
            refetch={refetch}
          />
        </section>
      )}

      {hasNonProduct && (
        <p className="text-B16 lg:text-B24 font-bold px-4 lg:px-0">محصولات</p>
      )}

      <MondrianProductList
        products={
          data?.pages
            .flatMap((page) => page.products)
            .map((product) => {
              return {
                id: product.id,
                title: product.title,
                images: product.imageUrls || [],
                discountPercent: product.discountPercent || 0,
                discountPrice:
                  product.discountPrice || product.price || 0,
                basePrice: product.basePrice || product.price || 0,
                sellerName: product.sellerName,
              };
            }) || []
        }
        fetchNextPage={fetchNextPage}
        hasNextPage={hasNextPage}
        isFetchingNextPage={isFetchingNextPage}
        isLoading={isLoading}
        isError={isError}
        refetch={refetch}
        emptyState={{
          image: <PackageSearch size={80} />,
          title: "محصولی در این جستجو یافت نشد",
          description: "جستجوی دیگری انجام دهید یا فیلترها را تغییر دهید",
        }}
      />
    </div>
  );
}

export const meta: MetaFunction = ({ params }) => {
  const query = params.query;
  const title = query ? `جستجو: ${query} | ویترون` : "جستجو | ویترون";
  const description = query
    ? `نتایج جستجو برای "${query}" در ویترون - یافتن بهترین محصولات با قیمت مناسب`
    : "جستجو در ویترون - یافتن محصولات مورد نظر با امکانات پیشرفته فیلتر و مرتب‌سازی";
  const imageUrl =
    "https://vitrownstatics.s3.ir-thr-at1.arvanstorage.ir/SVG-06.svg?versionId=";

  return [
    { title },
    { name: "description", content: description },
    {
      name: "keywords",
      content: `جستجو، ${query || ""}, محصولات، ویترون، فیلتر`,
    },
    { name: "robots", content: "index, follow" },

    // Open Graph
    { property: "og:type", content: "website" },
    { property: "og:title", content: title },
    { property: "og:description", content: description },
    { property: "og:image", content: imageUrl },
    { property: "og:site_name", content: "ویترون" },
    { property: "og:locale", content: "fa_IR" },

    // Twitter Card
    { name: "twitter:card", content: "summary_large_image" },
    { name: "twitter:title", content: title },
    { name: "twitter:description", content: description },
    { name: "twitter:image", content: imageUrl },
  ];
};