import type { APIRoute } from "astro";

export const GET: APIRoute = ({ site }) => {
  const origin = (site ?? new URL("https://example.com")).toString().replace(/\/$/, "");
  return new Response(
    `User-agent: *
Allow: /
Disallow: /admin

Sitemap: ${origin}/sitemap.xml
`,
    { headers: { "Content-Type": "text/plain; charset=utf-8" } },
  );
};