const http = require('node:http');
const { shouldBlockCrawler, extractUserAgent } = require('crawl-me-not');

const server = http.createServer((req, res) => {
  const userAgent = extractUserAgent(req.headers);
  const result = shouldBlockCrawler(userAgent, {
    blockAI: true,
    blockSEO: false,
    debug: true
  });

  if (result.isBlocked) {
    console.log(`Blocked ${result.crawlerType} crawler: ${result.userAgent}`);
    
    res.statusCode = 403;
    res.setHeader('Content-Type', 'application/json');
    res.setHeader('X-Blocked-Reason', 'AI crawler detected');
    res.end(JSON.stringify({
      error: 'Access denied',
      reason: `${result.crawlerType} crawler detected`,
      userAgent: result.userAgent
    }));
    return;
  }

  // Normal request handling
  res.statusCode = 200;
  res.setHeader('Content-Type', 'application/json');
  res.end(JSON.stringify({
    message: 'Hello World!',
    timestamp: new Date().toISOString()
  }));
});

const port = process.env.PORT || 3000;
server.listen(port, () => {
  console.log(`Server running on port ${port}`);
  console.log('AI crawlers will receive a 403 response');
});