import { MetadataRoute } from 'next';

export default function robots(): MetadataRoute.Robots {
  const siteUrl = process.env.NEXT_PUBLIC_SITE_URL || 'http://localhost:3000';

  return {
    rules: [
      {
        userAgent: '*',
        allow: '/',
        disallow: ['/api/', '/_next/', '/admin/'],
      },
      {
        userAgent: ['GPTBot', 'ChatGPT-User', 'Google-Extended', 'Anthropic-ai', 'ClaudeBot', 'Claude-Web', 'PerplexityBot', 'Cohere-ai'],
        allow: '/',
        disallow: ['/api/', '/_next/', '/admin/'],
      },
    ],
    sitemap: `${siteUrl}/sitemap.xml`,
    host: siteUrl,
  };
}