import type { APIRoute } from "astro";

export const prerender = true;

const robots = (sitemapURL: URL) => `User-agent: *
Allow: /

Disallow: /api/
Disallow: /pagefind/

Sitemap: ${sitemapURL.href}
`;

export const GET: APIRoute = ({ site }) => {
  // site vient de astro.config (option "site")
  const base = site ?? new URL("http://localhost:4321/");
  const sitemapURL = new URL("sitemap-index.xml", base);

  return new Response(robots(sitemapURL), {
    headers: { "Content-Type": "text/plain; charset=utf-8" },
  });
};
