export default function handler(req, res) {
  res.status(200).json({
    success: true,
    message: 'Debug endpoint - latest version',
    timestamp: new Date().toISOString(),
    method: req.method,
    environment: process.env.NODE_ENV || 'unknown',
    vercel_env: process.env.VERCEL_ENV || 'unknown',
    has_database_url: !!process.env.DATABASE_URL,
    has_jwt_secret: !!process.env.JWT_SECRET,
    database_url_length: process.env.DATABASE_URL ? process.env.DATABASE_URL.length : 0,
    database_url_starts_with: process.env.DATABASE_URL ? 
      process.env.DATABASE_URL.substring(0, 20) + '...' : 'not set',
    all_env_keys: Object.keys(process.env).filter(key => 
      key.includes('DATABASE') || key.includes('JWT') || key.includes('NEON')
    )
  });
}