export default defineEventHandler(async (event) => {
  const config = useRuntimeConfig();
  const site = config.public.siteUrl || "https://montech.ir";
  const apiBase = config.apiBase || "http://127.0.0.1:3050";

  let posts: Array<{ slug: string; updatedAt?: string; publishedAt?: string }> = [];
  try {
    posts = await $fetch(`${apiBase}/api/public/blog`);
  } catch {
    posts = [];
  }

  const staticUrls = ["", "/blog", "/gallery"];
  const urls = [
    ...staticUrls.map((path) => ({ loc: `${site}${path || "/"}`, changefreq: "weekly", priority: path === "" ? "1.0" : "0.8" })),
    ...posts.map((p) => ({
      loc: `${site}/blog/${p.slug}`,
      changefreq: "monthly",
      priority: "0.6",
      lastmod: p.updatedAt || p.publishedAt,
    })),
  ];

  const body = `<?xml version="1.0" encoding="UTF-8"?>
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
${urls
  .map(
    (u) => `  <url>
    <loc>${u.loc}</loc>
    ${"lastmod" in u && u.lastmod ? `<lastmod>${new Date(u.lastmod as string).toISOString()}</lastmod>` : ""}
    <changefreq>${u.changefreq}</changefreq>
    <priority>${u.priority}</priority>
  </url>`,
  )
  .join("\n")}
</urlset>`;

  setHeader(event, "Content-Type", "application/xml");
  return body;
});