---
import PageShell from '../../components/PageShell.astro';

import { getCollection, render } from 'astro:content';

export async function getStaticPaths() {
  const posts = await getCollection('blog', ({ data }) => !data.draft);

  return posts.map((post) => ({
    params: { slug: post.id },
    props: { post },
  }));
}

const { post } = Astro.props;
const { Content } = await render(post);
const siteUrl = new URL('/', Astro.site).toString();

// --- Date formatting ---
const formattedDate = new Intl.DateTimeFormat('th-TH', {
  dateStyle: 'long',
}).format(post.data.pubDate);

// --- Image: og_image > heroImage > default logo ---
const ogImage = new URL(
  post.data.og_image || post.data.heroImage || '/images/logos/logo-long-black.png',
  Astro.site,
).toString();

// --- FAQPage auto-extraction ---
const rawBody = post.body || '';
const faqSectionRegex = /##\s*คำถามที่พบบ่อย\s*\n([\s\S]*?)(?=##\s|\Z)/;
const faqMatch = rawBody.match(faqSectionRegex);
const faqPairs: { question: string; answer: string }[] = faqMatch
  ? [...faqMatch[1].matchAll(/###\s+(.+?)\n\s*\n?(.+?)(?=\n###|\Z)/gs)]
      .map(([, q, a]) => ({ question: q.trim(), answer: a.trim() }))
  : [];

// --- Escaped body for JSON-LD safety ---
const safeBody = rawBody.replace(/<\//g, '<\\/');

// --- BlogPosting JSON-LD ---
const blogPostingJsonLd = JSON.stringify({
  '@context': 'https://schema.org',
  '@id': `${siteUrl}blog/${post.id}/#blogposting`,
  '@type': 'BlogPosting',
  headline: post.data.title,
  description: post.data.description,
  datePublished: post.data.pubDate.toISOString(),
  dateModified: (post.data.updatedDate || post.data.pubDate).toISOString(),
  ...(post.data.author && {
    author: { '@type': 'Person', name: post.data.author },
  }),
  ...(post.data.reviewer && {
    reviewedBy: { '@type': 'Person', name: post.data.reviewer },
  }),
  publisher: {
    '@id': `${siteUrl}#organization`,
    '@type': 'Organization',
    name: 'MoreminiMore',
    logo: {
      '@type': 'ImageObject',
      url: new URL('/images/logos/logo-long-black.png', Astro.site).toString(),
    },
  },
  mainEntityOfPage: new URL(`/blog/${post.id}/`, Astro.site).toString(),
  articleBody: safeBody,
});

// --- BreadcrumbList JSON-LD ---
const breadcrumbJsonLd = JSON.stringify({
  '@context': 'https://schema.org',
  '@id': `${siteUrl}blog/${post.id}/#breadcrumb`,
  '@type': 'BreadcrumbList',
  itemListElement: [
    {
      '@type': 'ListItem',
      position: 1,
      name: 'บทความ',
      item: new URL('/blog/', Astro.site).toString(),
    },
    {
      '@type': 'ListItem',
      position: 2,
      name: post.data.title,
    },
  ],
});

// --- FAQPage JSON-LD ---
const faqPageJsonLd = faqPairs.length > 0
  ? JSON.stringify({
      '@context': 'https://schema.org',
      '@id': `${siteUrl}blog/${post.id}/#faq`,
      '@type': 'FAQPage',
      mainEntity: faqPairs.map(({ question, answer }) => ({
        '@type': 'Question',
        name: question,
        acceptedAnswer: {
          '@type': 'Answer',
          text: answer,
        },
      })),
    })
  : '';
---

<PageShell
  title={`${post.data.title} | MoreminiMore`}
  description={post.data.description}
  image={ogImage}
>
  <!-- JSON-LD: BreadcrumbList -->
  <script type="application/ld+json" set:html={breadcrumbJsonLd}>
  </script>

  <!-- JSON-LD: BlogPosting -->
  <script type="application/ld+json" set:html={blogPostingJsonLd}>
  </script>

  <!-- JSON-LD: FAQPage (auto — only if FAQ section found) -->
  {faqPageJsonLd && (
    <script type="application/ld+json" set:html={faqPageJsonLd}>
    </script>
  )}

  <article class="blog-article">
    <header class="blog-article-hero scene scene-light" data-scene="light">
      <div class="blog-article-heading">
        <a class="blog-back-link" href="/blog/">← บทความทั้งหมด</a>
        <div class="blog-article-meta">
          <span class="eyebrow eyebrow-yellow">{post.data.category}</span>
          <span class="eyebrow">{formattedDate}</span>
        </div>
        <h1>{post.data.title}</h1>
        <p class="blog-article-lead">{post.data.description}</p>
      </div>
    </header>

    <div class="blog-feature-image">
      <img src={post.data.heroImage || '/images/blog-placeholder.svg'} alt={post.data.title} />
    </div>

    <div class="blog-article-shell">
      <div class="blog-prose">
        <Content />
      </div>
    </div>
  </article>
</PageShell>

<style>
  .blog-article-hero { padding-bottom: clamp(36px, 5vw, 64px); }

  .blog-feature-image {
    max-width: var(--container);
    margin: 2rem auto 1rem;
    padding: 0 1rem;
  }

  .blog-feature-image img {
    width: 100%;
    border-radius: 20px;
    display: block;
  }
</style>