import { MetaFunction } from "@remix-run/node";
import { Link, useSearchParams } from "@remix-run/react";
import { useEffect, useState } from "react";
import { ChevronLeft } from "lucide-react";
import HomePageTopBar from "~/components/home/HomePageTopBar";
import { ProductImageCarousel } from "~/components/product";
import {
  useGetHomeBanners,
  useGetHomeDiscounts,
  useGetHomeForYou,
  useGetHomeSellerTiles,
} from "~/requestHandler/use-home-hooks";
import { useCollectionsInfiniteQuery } from "~/requestHandler/use-collection-hooks";
import { Skeleton } from "~/components/ui/skeleton";
import MondrianProductList from "~/components/MondrianProductList";
import HorizontalProductList from "~/components/HorizontalProductList";
import HorizontalCollectionsList from "~/components/HorizontalCollectionsList";
import SellerTilesGrid from "~/components/SellerTilesGrid";
import InvoiceModal from "~/components/home/InvoiceModal";

export default function HomePage() {
  const [searchParams] = useSearchParams();
  const [showInvoiceModal, setShowInvoiceModal] = useState(false);

  // Fetch home page data
  const { data: banners, isLoading: isLoadingBanners } = useGetHomeBanners();

  const {
    data: discountsData,
    isLoading: isLoadingDiscounts,
    isError: isErrorDiscounts,
    refetch: refetchDiscounts,
  } = useGetHomeDiscounts();

  const {
    data: forYouData,
    isLoading: isLoadingForYou,
    isError: isErrorForYou,
    refetch: refetchForYou,
    fetchNextPage: fetchNextForYou,
    hasNextPage: hasNextForYou,
    isFetchingNextPage: isFetchingNextForYou,
  } = useGetHomeForYou();

  const {
    data: sellerTilesData,
    isLoading: isLoadingSellerTiles,
    isError: isErrorSellerTiles,
    refetch: refetchSellerTiles,
  } = useGetHomeSellerTiles();

  const {
    data: collectionsData,
    isLoading: isLoadingCollections,
    isError: isErrorCollections,
    refetch: refetchCollections,
  } = useCollectionsInfiniteQuery({
    pageSize: 10,
  });

  // Flatten the paginated data - extract results from each page
  // For discounts, only get first page
  const discounts = discountsData?.pages[0]?.results || [];
  const forYouProducts =
    forYouData?.pages.flatMap((page) => page?.results || []) || [];
  const collections = collectionsData?.pages[0]?.results || [];

  useEffect(() => {
    // Check if the URL has an invoice parameter
    if (searchParams.has("invoice") && searchParams.has("shippinginfo")) {
      setShowInvoiceModal(true);
    }
  }, [searchParams]);

  return (
    <>
      <div className="flex flex-col pb-12">
        <div className="lg:hidden">
          <HomePageTopBar />
        </div>

        {/* Adding padding to account for fixed header */}
        <div className="flex flex-col gap-10 lg:gap-14 lg:max-w-[1320px] lg:w-full lg:mx-auto lg:px-8">
          {/* Hero: mobile = full-bleed banner carousel; desktop = main + 2 promos */}
          <div className="w-full mt-2 lg:mt-7 lg:grid lg:grid-cols-3 lg:gap-4">
            <div className="h-[260px] lg:h-[408px] lg:col-span-2 lg:rounded-[22px] lg:overflow-hidden lg:shadow-md">
              {isLoadingBanners ? (
                <Skeleton className="w-full h-full" />
              ) : (
                <ProductImageCarousel
                  images={banners?.map((banner) => banner.imageUrl || "") || []}
                  hideIndex={true}
                  borderRadius={0}
                />
              )}
            </div>

            {/* Desktop-only side promos */}
            <div className="hidden lg:grid lg:grid-rows-2 lg:gap-4">
              <Link
                to="/explore"
                className="relative block rounded-[22px] overflow-hidden shadow-sm group"
              >
                <div className="absolute inset-0 bg-gradient-to-br from-[#6f7359] to-[#454935] transition-transform duration-500 group-hover:scale-105" />
                <div className="absolute inset-0 bg-gradient-to-t from-black/60 to-transparent" />
                <div className="absolute inset-x-0 bottom-0 p-5 text-white">
                  <small className="text-[12px] font-bold opacity-90">
                    تازه رسید
                  </small>
                  <h3 className="text-[20px] font-extrabold mt-1 leading-snug">
                    کالکشن جدید
                  </h3>
                </div>
              </Link>
              <Link
                to="/"
                className="relative block rounded-[22px] overflow-hidden shadow-sm group"
              >
                <div className="absolute inset-0 bg-gradient-to-br from-[#b06a3c] to-[#7c4220] transition-transform duration-500 group-hover:scale-105" />
                <div className="absolute inset-0 bg-gradient-to-t from-black/60 to-transparent" />
                <div className="absolute inset-x-0 bottom-0 p-5 text-white">
                  <small className="text-[12px] font-bold opacity-90">
                    فروش ویژه
                  </small>
                  <h3 className="text-[20px] font-extrabold mt-1 leading-snug">
                    تا ۵۰٪ تخفیف
                  </h3>
                </div>
              </Link>
            </div>
          </div>

          <section
            id="section1"
            className="w-full gap-2 flex flex-col max-w-[100vw] lg:max-w-none lg:gap-5"
          >
            <div className="w-full px-4 lg:px-0">
              <p className="text-B16 lg:text-B24 font-bold">تخفیف‌ها</p>
              <p className="text-R14 lg:text-R16 text-GRAY">
                فرصت‌هایی محدود برای انتخاب‌های هوشمندانه
              </p>
            </div>
            <HorizontalProductList
              products={
                discounts?.map((product) => ({
                  id: product?.id || "",
                  title: product?.title || "",
                  images: Array.isArray(product?.imageUrls)
                    ? product.imageUrls
                    : [],
                  discountPercent: product?.discountPercent || 0,
                  discountPrice: product?.discountPrice || 0,
                  basePrice: product?.basePrice || 0,
                })) || []
              }
              isLoading={isLoadingDiscounts}
              isError={isErrorDiscounts}
              refetch={refetchDiscounts}
            />
          </section>
          <section
            id="section2"
            className="w-full gap-2 flex flex-col max-w-[100vw] lg:max-w-none lg:gap-5"
          >
            <div className="w-full px-4 lg:px-0 flex items-center justify-between">
              <div>
                <p className="text-B16 lg:text-B24 font-bold">برترین فروشگاه‌ها</p>
                <p className="text-R14 lg:text-R16 text-GRAY">
                  برگرفته از بالاترین سطح رضایت کاربران
                </p>
              </div>
              <Link
                to="/sellers"
                className="flex items-center gap-1 text-R14 text-gray-500 hover:text-gray-800 hover:underline transition-colors group"
              >
                <span>مشاهده همه</span>
                <ChevronLeft
                  size={16}
                  className="group-hover:-translate-x-1 transition-transform"
                />
              </Link>
            </div>
            <SellerTilesGrid
              sellers={sellerTilesData || []}
              isLoading={isLoadingSellerTiles}
              isError={isErrorSellerTiles}
              refetch={refetchSellerTiles}
              showViewAllButton={false}
            />
          </section>
          <section
            id="collections"
            className="w-full gap-2 flex flex-col max-w-[100vw] lg:max-w-none lg:gap-5"
          >
            <div className="w-full px-4 lg:px-0">
              <p className="text-B16 lg:text-B24 font-bold">کالکشن‌ها</p>
              <p className="text-R14 lg:text-R16 text-GRAY">
                مجموعه‌های منتخب از بهترین محصولات
              </p>
            </div>
            <HorizontalCollectionsList
              collections={
                collections?.map((collection) => ({
                  id: collection?.id || "",
                  title: collection?.title || "",
                  description: collection?.description || "",
                  coverImageUrl: collection?.coverImageUrl || "",
                  productCount: collection?.productCount || 0,
                })) || []
              }
              isLoading={isLoadingCollections}
              isError={isErrorCollections}
              refetch={refetchCollections}
              showViewAllButton={true}
            />
          </section>
          <section
            id="section3"
            className="w-full gap-2 flex flex-col max-w-[100vw] lg:max-w-none lg:gap-5"
          >
            <div className="w-full px-4 lg:px-0">
              <p className="text-B16 lg:text-B24 font-bold">برای شما</p>
              <p className="text-R14 lg:text-R16 text-GRAY">
                با الهام از انتخاب‌های شما
              </p>
            </div>
            <MondrianProductList
              products={
                forYouProducts?.map((product) => ({
                  id: product?.id || "",
                  title: product?.title || "",
                  images: Array.isArray(product?.imageUrls)
                    ? product.imageUrls
                    : [],
                  discountPercent: product?.discountPercent || 0,
                  discountPrice: product?.discountPrice || 0,
                  basePrice: product?.basePrice || 0,
                })) || []
              }
              fetchNextPage={fetchNextForYou}
              hasNextPage={hasNextForYou || false}
              isFetchingNextPage={isFetchingNextForYou}
              isLoading={isLoadingForYou}
              isError={isErrorForYou}
              refetch={refetchForYou}
              emptyState={{}}
            />
          </section>
        </div>
      </div>

      <InvoiceModal
        open={showInvoiceModal}
        onOpenChange={setShowInvoiceModal}
      />
    </>
  );
}

export const meta: MetaFunction = () => {
  const title = "ویترون | پلتفرم خرید آنلاین - محصولات باکیفیت با بهترین قیمت";
  const description =
    "ویترون بهترین پلتفرم خرید آنلاین در ایران. محصولات متنوع، قیمت مناسب، تحویل سریع. خرید امن از فروشگاه‌های معتبر با بالاترین کیفیت خدمات.";
  const imageUrl =
    "https://vitrownstatics.s3.ir-thr-at1.arvanstorage.ir/SVG-06.svg?versionId=";
  const siteUrl = import.meta.env.VITE_SITE_URL || "https://vitrown.com/";

  return [
    { title },
    { name: "description", content: description },
    {
      name: "keywords",
      content:
        "خرید آنلاین، فروشگاه اینترنتی، ویترون، محصولات باکیفیت، خرید امن، تحویل سریع",
    },
    { name: "author", content: "Vitrown" },
    { name: "robots", content: "index, follow" },
    // viewport is defined globally in root.tsx (with viewport-fit=cover for
    // iOS safe-area handling); don't override it here or the home page loses
    // edge-to-edge / notch support.

    // Open Graph
    { property: "og:type", content: "website" },
    { property: "og:title", content: title },
    { property: "og:description", content: description },
    { property: "og:image", content: imageUrl },
    { property: "og:url", content: siteUrl },
    { 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 },

    // Additional SEO
    { name: "theme-color", content: "#ffffff" },
    { name: "mobile-web-app-capable", content: "yes" },
    { name: "apple-mobile-web-app-status-bar-style", content: "default" },
    { name: "format-detection", content: "telephone=no" },

    // Structured Data
    {
      "script:ld+json": {
        "@context": "https://schema.org",
        "@type": "WebSite",
        name: "ویترون",
        description: description,
        url: siteUrl,
        potentialAction: {
          "@type": "SearchAction",
          target: {
            "@type": "EntryPoint",
            urlTemplate: siteUrl + "/search/{search_term_string}",
          },
          "query-input": "required name=search_term_string",
        },
        publisher: {
          "@type": "Organization",
          name: "ویترون",
          url: siteUrl,
        },
      },
    },
  ];
};