import type { PublicProductRef } from "@imen/shared";

interface SitemapEntry {
  loc: string;
  priority: string;
  lastmod?: string;
}

export default defineEventHandler(async (event) => {
  const [categories, products] = await Promise.all([
    fetchCategories(),
    serverApi<PublicProductRef[]>("/public/products"),
  ]);
  const pages: SitemapEntry[] = [
    { loc: "/", priority: "1" },
    ...categories.map((c) => ({ loc: `/categories/${c.slug}`, priority: "0.8" })),
    ...products.map((p) => ({ loc: `/products/${p.slug}`, priority: "0.6", lastmod: p.updatedAt })),
  ];

  setHeader(event, "Content-Type", "application/xml; charset=utf-8");
  const lastmod = new Date().toISOString();
  const urls = pages
    .map(
      (p) =>
        `<url>\n<loc>${absUrl(p.loc)}</loc>\n<lastmod>${p.lastmod ?? lastmod}</lastmod>\n<changefreq>weekly</changefreq>\n<priority>${p.priority}</priority>\n</url>`,
    )
    .join("\n");
  return `<?xml version="1.0" encoding="UTF-8"?>\n<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">\n${urls}\n</urlset>\n`;
});