Monitoring & Observability

const authSuccessRate = (successfulAuths / totalAuths) * 100;

// Alert if below threshold
if (authSuccessRate < 99.5) {
  triggerAlert('AUTH_SUCCESS_RATE_LOW', {
    currentRate: authSuccessRate,
    threshold: 99.5,
    severity: 'high'
  });
}

const measureResponseTime = async (authFunction) => {
  const startTime = Date.now();
  const result = await authFunction();
  const responseTime = Date.now() - startTime;

  responseTimeMetric.observe(responseTime / 1000);

  if (responseTime > 3000) {
    triggerAlert('AUTH_SLOW_RESPONSE', {
      responseTime,
      threshold: 3000,
      severity: 'medium'
    });
  }

  return result;
};

const throughputCounter = new Map();

const trackThroughput = () => {
  const currentMinute = Math.floor(Date.now() / 60000);
  const count = throughputCounter.get(currentMinute) || 0;
  throughputCounter.set(currentMinute, count + 1);

  // Clean old data
  for (const [minute, _] of throughputCounter) {
    if (minute < currentMinute - 5) {
      throughputCounter.delete(minute);
    }
  }

  return count + 1;
};

const paymentMetrics = {
  successful: 0,
  failed: 0,
  total: 0
};

const trackPayment = (success, amount, reason) => {
  paymentMetrics.total++;

  if (success) {
    paymentMetrics.successful++;
  } else {
    paymentMetrics.failed++;

    // Track failure reasons
    paymentFailureReasons[reason] = (paymentFailureReasons[reason] || 0) + 1;
  }

  const successRate = (paymentMetrics.successful / paymentMetrics.total) * 100;

  if (successRate < 99.9) {
    triggerAlert('PAYMENT_SUCCESS_RATE_LOW', {
      successRate,
      totalPayments: paymentMetrics.total,
      failedPayments: paymentMetrics.failed
    });
  }
};

const revenueMetrics = {
  totalValue: 0,
  transactionCount: 0,
  averageValue: 0
};

const trackRevenue = (transactionValue) => {
  revenueMetrics.totalValue += transactionValue;
  revenueMetrics.transactionCount++;
  revenueMetrics.averageValue = revenueMetrics.totalValue / revenueMetrics.transactionCount;

  // Track hourly revenue
  const hour = Math.floor(Date.now() / 3600000);
  hourlyRevenue[hour] = (hourlyRevenue[hour] || 0) + transactionValue;
};

const websocketMetrics = {
  activeConnections: 0,
  totalConnections: 0,
  reconnections: 0,
  failures: 0
};

const monitorWebSocket = (ws) => {
  websocketMetrics.activeConnections++;
  websocketMetrics.totalConnections++;

  ws.on('close', (code, reason) => {
    websocketMetrics.activeConnections--;

    if (code !== 1000) { // Not normal closure
      websocketMetrics.failures++;

      triggerAlert('WEBSOCKET_ABNORMAL_CLOSURE', {
        code,
        reason,
        activeConnections: websocketMetrics.activeConnections
      });
    }
  });

  ws.on('error', (error) => {
    websocketMetrics.failures++;
    triggerAlert('WEBSOCKET_ERROR', { error: error.message });
  });
};

const apiMetrics = {
  requests: 0,
  errors: 0,
  timeouts: 0,
  rateLimited: 0
};

const monitorApiCall = async (apiCall) => {
  apiMetrics.requests++;

  try {
    const response = await apiCall();

    if (response.status === 429) {
      apiMetrics.rateLimited++;
    }

    return response;
  } catch (error) {
    if (error.name === 'TimeoutError') {
      apiMetrics.timeouts++;
    } else {
      apiMetrics.errors++;
    }

    throw error;
  }
};

// Trigger: All requests failing for > 1 minute
if (errorRate > 95 && timeWindow > 60000) {
  triggerAlert('SERVICE_DOWN', {
    errorRate,
    duration: timeWindow,
    lastSuccessfulRequest: lastSuccess
  }, 'critical');
}

// Trigger: >10 consecutive payment failures
if (consecutivePaymentFailures > 10) {
  triggerAlert('PAYMENT_SYSTEM_FAILURE', {
    consecutiveFailures: consecutivePaymentFailures,
    totalFailures: totalPaymentFailures,
    timeWindow: '5 minutes'
  }, 'critical');
}

// Trigger: Error rate > 1% for > 5 minutes
if (errorRate > 1 && sustainedDuration > 300000) {
  triggerAlert('HIGH_ERROR_RATE', {
    currentErrorRate: errorRate,
    threshold: 1,
    duration: sustainedDuration,
    errorBreakdown: getErrorBreakdown()
  }, 'high');
}

// Trigger: 95th percentile > 5 seconds
if (responseTime95th > 5000) {
  triggerAlert('SLOW_RESPONSE_TIME', {
    p95ResponseTime: responseTime95th,
    p99ResponseTime: responseTime99th,
    avgResponseTime: avgResponseTime
  }, 'high');
}

// 1. Check service health
const health = await fetch('https://app.boop.it/health');
console.log('BOOP service health:', await health.json());

// 2. Verify credentials
if (!apiKey.startsWith('sk_live_')) {
  console.error('Invalid production API key format');
}

// 3. Test basic connectivity
const testAuth = await authenticateUser({
  type: 'entrance',
  attributes: ['pseudonym']
});

// 4. Check for rate limiting
if (response.status === 429) {
  console.warn('Rate limited - implement exponential backoff');
}

// 1. Implement connection pooling
const connectionPool = new WebSocketPool({
  maxConnections: 5,
  reuseConnections: true,
  keepAliveInterval: 30000
});

// 2. Add request timeout
const authWithTimeout = Promise.race([
  authenticateUser(context),
  new Promise((_, reject) =>
    setTimeout(() => reject(new Error('Timeout')), 10000)
  )
]);

// 3. Implement caching for frequent requests
const userCache = new LRUCache({ max: 1000, ttl: 300000 });

const diagnosePament = async (userId, amount, transactionId) => {
  // 1. Check user balance
  const balance = await getUserBalance(userId);
  console.log(`User balance: $${balance / 100}, Required: $${amount / 100}`);

  // 2. Verify transaction status
  const txStatus = await getTransactionStatus(transactionId);
  console.log('Transaction status:', txStatus);

  // 3. Check recent transactions
  const recentTx = await getTransactionHistory(userId, Date.now() - 3600000);
  console.log(`Recent transactions: ${recentTx.length}`);

  return {
    sufficientFunds: balance >= amount,
    transactionExists: txStatus.found,
    recentTransactionCount: recentTx.length
  };
};