const crypto = require('crypto');

async function trackEvent(eventType, userEmail, metadata = {}) {
  const brandId = process.env.LOYALTEEZ_BRAND_ID;
  const securityKey = process.env.LOYALTEEZ_SECURITY_KEY;
  const timestamp = Date.now();
  
  const body = JSON.stringify({
    brandId,
    eventType,
    userEmail,
    metadata
  });
  
  // Create HMAC-SHA256 signature
  const signingString = `${timestamp}:${brandId}:${body}`;
  const signature = crypto
    .createHmac('sha256', securityKey)
    .update(signingString)
    .digest('hex');
  
  const response = await fetch(
    'https://api.loyalteez.app/loyalteez-api/manual-event',
    {
      method: 'POST',
      headers: {
        'Content-Type': 'application/json',
        'X-Loyalteez-Brand-Id': brandId,
        'X-Loyalteez-Signature': signature,
        'X-Loyalteez-Timestamp': timestamp.toString()
      },
      body
    }
  );
  
  return response.json();
}

// Usage: reward a user for completing a quest
const result = await trackEvent(
  'quest_completed',
  '[email protected]',
  { quest_name: 'First Blood', difficulty: 'hard' }
);