Functions

export const handler = async (event) => {
  const { items, customerId, paymentMethod } = JSON.parse(event.body);
  
  // Validate inventory
  const available = await checkInventory(items);
  if (!available) {
    return { statusCode: 409, body: 'Items out of stock' };
  }
  
  // Process payment
  const payment = await processPayment(paymentMethod);
  
  // Create order
  const order = await createOrder({ items, customerId, payment });
  
  // Send confirmation
  await sendOrderConfirmation(order);
  
  return {
    statusCode: 201,
    body: JSON.stringify({ orderId: order.id, total: order.total })
  };
};

export const handler = async (event) => {
  const { email, password } = JSON.parse(event.body);
  
  // Authenticate user
  const user = await validateCredentials(email, password);
  if (!user) {
    return { statusCode: 401, body: 'Invalid credentials' };
  }
  
  // Generate secure token
  const token = await generateJWT(user);
  
  // Track login analytics
  await trackUserLogin(user.id);
  
  return {
    statusCode: 200,
    body: JSON.stringify({
      token,
      user: { id: user.id, email: user.email, plan: user.plan }
    })
  };
};

export const handler = async (event) => {
  const { fileUrl, userId, contentType } = JSON.parse(event.body);
  
  // Download and validate file
  const file = await downloadFile(fileUrl);
  const isValid = await validateContent(file, contentType);
  
  if (!isValid) {
    return { statusCode: 400, body: 'Invalid content' };
  }
  
  // Generate thumbnails and process
  const thumbnails = await generateThumbnails(file);
  const processedFile = await optimizeForDelivery(file);
  
  // Save to CDN
  const urls = await uploadToCDN([processedFile, ...thumbnails]);
  
  return {
    statusCode: 200,
    body: JSON.stringify({ originalUrl: urls[0], thumbnails: urls.slice(1) })
  };
};

export const handler = async (event) => {
  const analyticsEvents = JSON.parse(event.body);
  
  // Process each event
  for (const eventData of analyticsEvents) {
    // Enrich with user context
    const enrichedEvent = await enrichEventData(eventData);
    
    // Real-time analytics
    await updateRealTimeMetrics(enrichedEvent);
    
    // Store for batch processing
    await queueForBatchAnalysis(enrichedEvent);
  }
  
  // Generate insights
  const insights = await generateRealTimeInsights();
  
  return {
    statusCode: 200,
    body: JSON.stringify({ processed: analyticsEvents.length, insights })
  };
};