import { shouldBlockCrawler, extractUserAgent } from 'crawl-me-not';
import type { Handle } from '@sveltejs/kit';

export const handle: Handle = async ({ event, resolve }) => {
  const userAgent = extractUserAgent(event.request.headers);
  const result = shouldBlockCrawler(userAgent, {
    blockAI: true,
    blockSEO: false,
    debug: true
  });

  if (result.isBlocked) {
    console.log(`Blocked ${result.crawlerType} crawler: ${result.userAgent}`);
    return new Response('Access denied', {
      status: 403,
      headers: {
        'Content-Type': 'application/json',
        'X-Blocked-Reason': `${result.crawlerType} crawler detected`
      }
    });
  }

  return resolve(event);
};

// If you need to compose multiple handles:
// import { sequence } from '@sveltejs/kit/hooks';
// 
// export const handle = sequence(
//   crawlerBlockingHandle,
//   // your other handles...
// );