import type { Metadata } from "next";
import { notFound, redirect } from "next/navigation";
import { PageHeader } from "@/components/PageHeader";
import { Gallery } from "@/components/catalog/Gallery";
import { Tabs } from "@/components/catalog/Tabs";
import { TechnicalDataTable } from "@/components/catalog/TechnicalDataTable";
import { CommentsPanel } from "@/components/catalog/CommentsPanel";
import { EntityCard } from "@/components/catalog/EntityCard";
import { SimilarRow } from "@/components/catalog/SimilarRow";
import { AddToCartBar } from "@/components/catalog/AddToCartBar";
import { getSession } from "@/lib/auth";
import { safe } from "@/lib/meshkee/client";
import { getComments } from "@/lib/meshkee/comments";
import { normalizeGallery, normalizeImage, pickText, slugify } from "@/lib/meshkee/format";
import { getProductById, getProductTechnicalInfo } from "@/lib/meshkee/products";
import { getStoreItemByProduct } from "@/lib/meshkee/store-items";

type Params = { id: string; slug: string };

export async function generateMetadata({ params }: { params: Promise<Params> }): Promise<Metadata> {
  const { id } = await params;
  try {
    const { product } = await getProductById(id);
    const name = pickText(product.nameFa, product.name, product.title);
    return { title: product.seoMetaTitle || name, description: product.seoMetaDescription || product.summary || undefined };
  } catch {
    return { title: "فروشگاه" };
  }
}

export default async function StoreItemDetailPage({ params }: { params: Promise<Params> }) {
  const { id, slug } = await params;

  let detail;
  try {
    detail = await getProductById(id);
  } catch {
    notFound();
  }

  const { product, relatedProducts = [] } = detail;
  const name = pickText(product.nameFa, product.name, product.title);
  const canonicalSlug = slugify(name);
  if (canonicalSlug && canonicalSlug !== slug) {
    redirect(`/store/${id}/${canonicalSlug}`);
  }

  const [technicalInfo, comments, session, storeItemResult] = await Promise.all([
    safe(getProductTechnicalInfo(id), null),
    safe(getComments("store_item", id), { items: [] }),
    getSession(),
    safe(getStoreItemByProduct(id), { storeItem: null }),
  ]);

  const images = normalizeGallery(product.gallery ?? product.images ?? []);
  const mainImage = normalizeImage(product.titleImageUrl ?? product.imageUrl);
  const gallery = mainImage && images.length === 0 ? [mainImage] : images;
  const variants = storeItemResult.storeItem?.variants ?? [];

  return (
    <>
      <PageHeader title={name} current="فروشگاه" />
      <section className="boxed py-12">
        <div className="grid gap-10 md:grid-cols-2">
          <Gallery images={gallery} alt={name} />
          <div>
            <h2 className="text-2xl font-bold text-ink">{name}</h2>
            {product.summary && <p className="mt-4 text-sm leading-8 text-body">{product.summary}</p>}
            <div className="mt-6">
              <AddToCartBar variants={variants} productName={name} image={mainImage ?? gallery[0] ?? null} />
            </div>
          </div>
        </div>

        <div className="mt-10">
          <Tabs
            tabs={[
              {
                key: "description",
                label: "توضیحات",
                content: product.descriptionHtml ? (
                  <div className="prose max-w-none text-sm leading-8 text-body" dangerouslySetInnerHTML={{ __html: product.descriptionHtml }} />
                ) : (
                  <p className="text-sm leading-8 text-body">{product.description || product.summary || "توضیحاتی ثبت نشده است."}</p>
                ),
              },
              { key: "technical", label: "مشخصات فنی", content: <TechnicalDataTable info={technicalInfo} /> },
              {
                key: "comments",
                label: `نظرات${comments.items.length ? ` (${comments.items.length.toLocaleString("fa-IR")})` : ""}`,
                content: (
                  <CommentsPanel
                    entityType="store_item"
                    entityId={id}
                    initialComments={comments.items}
                    user={session?.user ?? null}
                    token={session?.token ?? null}
                  />
                ),
              },
            ]}
          />
        </div>
      </section>

      {relatedProducts.length > 0 && (
        <SimilarRow title="محصولات مشابه">
          {relatedProducts.map((related) => {
            const relatedName = pickText(related.nameFa, related.name, related.title);
            return (
              <EntityCard
                key={related.id}
                href={`/store/${related.id}/${slugify(relatedName)}`}
                image={normalizeImage(related.titleImageUrl ?? related.imageUrl)}
                title={relatedName}
                price={related.discountedPrice ?? related.price}
                originalPrice={related.discountedPrice ? related.price : undefined}
              />
            );
          })}
        </SimilarRow>
      )}
    </>
  );
}