import BlogPage from "@/components/blog";
import Layout from "@/components/layout/StLayout";
import { fetchReq } from "@/lib/req";
import { getStateInfo } from "@/lib/getStateInfo";
import { normalizeBlog, imageUrl } from "@/helper";

const FALLBACK_IMG = "https://www.nobat724.com/assets/images/logo.png";

export async function generateMetadata({ params }) {
  const { slug } = await params;
  const API_URL = process.env.NEXT_PUBLIC_API_URL;
  const { matchedCity } = await getStateInfo();
  const siteName = matchedCity?.site_name || "نوبت 724";

  try {
    const res = await fetchReq(`${API_URL}/api/v1/blog/${slug}`);
    const blog = res?.data?.data;
    if (!blog) return {};

    const title = `${blog.title} | ${siteName}`;
    const rawText = (blog.summary || blog.body || "")
      .replace(/<[^>]*>/g, "")
      .trim();
    const description = rawText.slice(0, 160) || blog.title;
    const image = blog.image_url ? imageUrl(blog.image_url) : FALLBACK_IMG;

    return {
      title,
      description,
      openGraph: {
        title,
        description,
        type: "article",
        ...(blog.created_at && {
          publishedTime: new Date(blog.created_at * 1000).toISOString(),
        }),
        images: [image],
      },
      twitter: {
        card: "summary_large_image",
        title,
        description,
        images: [image],
      },
    };
  } catch {
    return {};
  }
}

async function Blog({ params }) {
  const { slug } = await params;
  const API_URL = process.env.NEXT_PUBLIC_API_URL;

  const res = await fetchReq(`${API_URL}/api/v1/blog/${slug}`);
  const blog = normalizeBlog(res?.data?.data);

  let relatedBlogs = [];
  const relatedResponse = await fetchReq(
    `${API_URL}/api/v1/blogs?page=1&limit=6`
  );
  relatedBlogs = (relatedResponse?.data || [])
    .filter((b) => b.uuid !== blog?.uuid)
    .slice(0, 4)
    .map(normalizeBlog);

  const jsonLd = blog
    ? {
        "@context": "https://schema.org",
        "@type": "Article",
        headline: blog.title,
        ...(blog.images?.[0]?.url && { image: imageUrl(blog.images[0].url) }),
        ...(blog.created && {
          datePublished: new Date(blog.created * 1000).toISOString(),
        }),
        ...(blog.author && { author: { "@type": "Person", name: blog.author } }),
      }
    : null;

  return (
    <>
      {jsonLd && (
        <script
          type="application/ld+json"
          dangerouslySetInnerHTML={{ __html: JSON.stringify(jsonLd) }}
        />
      )}
      <Layout>
        <BlogPage blog={blog} blogs={relatedBlogs} />
      </Layout>
    </>
  );
}

export default Blog;