// Динамический sitemap из всех 6 коллекций
import { getCollection } from 'astro:content';

const BASE = 'https://нейросети.рус';

function lastmod(dateStr) {
  if (!dateStr) return new Date().toISOString().split('T')[0];
  const d = typeof dateStr === 'string' ? new Date(dateStr) : dateStr;
  return d.toISOString().split('T')[0];
}

const pages = [
  { url: '/', priority: '1.0' },
  { url: '/examples/', priority: '0.9' },
  { url: '/models/', priority: '0.9' },
  { url: '/compare/', priority: '0.8' },
  { url: '/news/', priority: '0.8' },
  { url: '/guide/', priority: '0.8' },
  { url: '/ace-studio/', priority: '0.8' },
];

export async function GET() {
  const collections = ['examples', 'models', 'compare', 'news', 'guide', 'aceStudio'];
  for (const name of collections) {
    try {
      const items = await getCollection(name);
      for (const item of items) {
        const slug = name === 'aceStudio' ? 'ace-studio' : name;
        pages.push({
          url: `/${slug}/${item.slug}/`,
          priority: '0.7',
          lastmod: lastmod(item.data.date),
        });
      }
    } catch (e) {
      // коллекция может быть пустой
    }
  }

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

  return new Response(xml, {
    headers: {
      'Content-Type': 'application/xml; charset=utf-8',
      'Cache-Control': 'public, max-age=86400',
    },
  });
}