" text sitting in an .xml
// file, since web servers don't run PHP inside .xml — it was almost
// certainly being served to Google as broken XML). This regenerates the
// sitemap from the real database on every request: homepage, static
// pages, every published blog post, and every active product — so
// everything you actually publish becomes discoverable by search engines.
// /.htaccess rewrites the public /sitemap.xml URL to this file.
// ============================================================
require_once __DIR__ . '/db.php';

header('Content-Type: application/xml; charset=utf-8');

$host = $_SERVER['HTTP_HOST'] ?? 'vintageug.duckdns.org';
$base = 'https://' . $host;

function sm_url($loc, $lastmod, $changefreq, $priority) {
    return "  <url>\n"
        . "    <loc>" . htmlspecialchars($loc) . "</loc>\n"
        . "    <lastmod>" . htmlspecialchars($lastmod) . "</lastmod>\n"
        . "    <changefreq>{$changefreq}</changefreq>\n"
        . "    <priority>{$priority}</priority>\n"
        . "  </url>\n";
}

$today = date('Y-m-d');
$xml = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n";
$xml .= "<urlset xmlns=\"http://www.sitemaps.org/schemas/sitemap/0.9\">\n";

// ---- Homepage + static pages ----
$xml .= sm_url("{$base}/", $today, 'daily', '1.0');
foreach (['blog', 'reviews', 'compare'] as $staticPage) {
    $xml .= sm_url("{$base}/{$staticPage}.php", $today, 'weekly', '0.6');
}

// ---- Blog posts (published only) ----
try {
    $stmt = $pdo->query("SELECT id, created_at, updated_at FROM blog_posts WHERE is_published = 1 ORDER BY created_at DESC LIMIT 500");
    foreach ($stmt->fetchAll(PDO::FETCH_ASSOC) as $post) {
        $lastmod = !empty($post['updated_at']) ? $post['updated_at'] : $post['created_at'];
        $xml .= sm_url("{$base}/blog.php?id=" . (int) $post['id'], date('Y-m-d', strtotime($lastmod)), 'monthly', '0.7');
    }
} catch (Throwable $e) {
    // blog_posts table/columns may not match on every install — skip quietly, homepage still ships.
}

// ---- Products (active/in-catalog only) ----
try {
    $stmt = $pdo->query("SELECT id, updated_at, created_at FROM products WHERE is_active = 1 ORDER BY id DESC LIMIT 1000");
    foreach ($stmt->fetchAll(PDO::FETCH_ASSOC) as $product) {
        $lastmod = !empty($product['updated_at']) ? $product['updated_at'] : ($product['created_at'] ?? $today);
        $xml .= sm_url("{$base}/index.php?product=" . (int) $product['id'], date('Y-m-d', strtotime($lastmod)), 'weekly', '0.8');
    }
} catch (Throwable $e) {
    // Same defensive skip as above.
}

$xml .= "</urlset>";

echo $xml;