// app/sitemap/route.ts

interface SitemapPage {
  loc: string;
  lastmod: string;
}

export const GET = async () => {
  const BASE_URL = "https://trees.falktron.com";

  const useCases = [
    "forestry",
    "research",
    "agriculture",
    "cities-communities",
  ];

  const pages: SitemapPage[] = [
    { loc: `${BASE_URL}/`, lastmod: new Date().toISOString().split("T")[0] },
    ...useCases.map((slug) => ({
      loc: `${BASE_URL}/use-cases/${slug}`,
      lastmod: new Date().toISOString().split("T")[0],
    })),
  ];

  const xml = `<?xml version="1.0" encoding="UTF-8"?>
  <urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
    ${pages
      .map(
        (page) => `
      <url>
        <loc>${page.loc}</loc>
        <lastmod>${page.lastmod}</lastmod>
      </url>`
      )
      .join("")}
  </urlset>`;

  return new Response(xml, {
    status: 200,
    headers: {
      "Content-Type": "application/xml",
      "Cache-Control": "public, s-maxage=86400, stale-while-revalidate=3600",
    },
  });
};