import { newsData } from "@/lib/news.data";

const SITE_URL = "https://www.ncbrasil.com.br";

export default function Sitemap() {
  return null;
}

export const loader = async () => {
  const staticRoutes = [
    "/",
    "/empresa/quem-somos",
    "/empresa/nossa-historia",
    "/empresa/clientes",
    "/contato",
    "/orcamento",
    "/nossos-servicos",
    "/nossos-sistemas",
    "/cases",
    "/trabalhos-realizados",
    "/servicos/desenvolvimento",
    "/servicos/sistemas-web",
    "/servicos/aplicativos",
    "/servicos/identidade-visual",
    "/servicos/google-ads",
    "/servicos/consultoria",
    "/sistema-de-leilao",
    "/sistema-de-leilao-rural",
    "/sistema-de-leilao-de-centavos",
    "/sistema-de-rifas",
    "/sistema-de-raspadinha",
    "/sistema-de-cupom-descontos",
    "/sistema-de-revenda-de-veiculos",
    "/classificados-de-veiculos",
    "/plataforma-chinesa-apostas-cassino",
    "/portfolio/sites-criados",
    "/portfolio/lojas-virtuais-criadas",
    "/portfolio/criacao-de-aplicativos",
    "/portfolio/sistemas-criados",
    "/portfolio/identidade-visual",
    "/noticias",
  ];

  const newsRoutes = newsData
    .filter(post => post.slug && post.slug.trim() !== "")
    .map((post) => `/noticias/${post.slug}`);
  
  const categories = Array.from(new Set(newsData.flatMap(p => p.categories)));
  const categoryRoutes = categories
    .filter(cat => cat && cat !== "Sem categoria")
    .map(cat => `/noticias/categoria/${cat.toLowerCase().replace(/\s+/g, '-')}`);

  const allRoutes = [...staticRoutes, ...newsRoutes, ...categoryRoutes];
  const date = new Date().toISOString();

  const sitemap = `<?xml version="1.0" encoding="UTF-8"?>
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
  ${allRoutes
    .map((route) => {
      const loc = `${SITE_URL}${route.startsWith("/") ? "" : "/"}${route}`;
      return `
  <url>
    <loc>${loc}</loc>
    <lastmod>${date}</lastmod>
    <changefreq>${route === "/" ? "daily" : "weekly"}</changefreq>
    <priority>${route === "/" ? "1.0" : route.includes("sistema-de-") ? "0.9" : "0.7"}</priority>
  </url>`;
    })
    .join("")}
</urlset>`;

  return new Response(sitemap, {
    headers: {
      "Content-Type": "application/xml",
      "Cache-Control": "public, max-age=3600, s-maxage=18000",
    },
  });
};