const http = require('http');

console.log(`[${new Date().toISOString()}] Frontend health check starting...`);

const options = {
  hostname: '127.0.0.1',
  port: 3000,
  path: '/',
  method: 'GET',
  timeout: 8000
};

console.log(`[${new Date().toISOString()}] Checking: http://${options.hostname}:${options.port}${options.path}`);

const req = http.request(options, (res) => {
  console.log(`[${new Date().toISOString()}] Response status: ${res.statusCode}`);
  console.log(`[${new Date().toISOString()}] Response headers:`, JSON.stringify(res.headers, null, 2));
  
  let data = '';
  res.on('data', chunk => {
    data += chunk;
  });
  
  res.on('end', () => {
    console.log(`[${new Date().toISOString()}] Response body length: ${data.length} bytes`);
    console.log(`[${new Date().toISOString()}] Response snippet:`, data.substring(0, 200));
    
    // Accept any 2xx or 3xx status code (React dev server might redirect)
    if (res.statusCode >= 200 && res.statusCode < 400) {
      console.log(`[${new Date().toISOString()}] Health check PASSED`);
      process.exit(0);
    } else {
      console.log(`[${new Date().toISOString()}] Health check FAILED - status: ${res.statusCode}`);
      process.exit(1);
    }
  });
});

req.on('error', (err) => {
  console.log(`[${new Date().toISOString()}] Health check ERROR:`, err.message);
  console.log(`[${new Date().toISOString()}] Error code:`, err.code);
  console.log(`[${new Date().toISOString()}] Error syscall:`, err.syscall);
  console.log(`[${new Date().toISOString()}] Error address:`, err.address);
  console.log(`[${new Date().toISOString()}] Error port:`, err.port);
  process.exit(1);
});

req.on('timeout', () => {
  console.log(`[${new Date().toISOString()}] Health check TIMEOUT after ${options.timeout}ms`);
  req.destroy();
  process.exit(1);
});

req.setTimeout(options.timeout);
req.end();