export const handler = async (event) => {
  const orderData = JSON.parse(event.body);
  
  // Complex business rules the platform doesn't support
  const customPricing = await calculateEnterpriseDiscount({
    customer: orderData.customer,
    items: orderData.items,
    volume: orderData.totalValue,
    paymentMethod: orderData.payment.method
  });
  
  // Multi-channel inventory reservation
  await reserveInventoryAcrossChannels(orderData.items, orderData.storeCode);
  
  // Custom payment flow for B2B customers
  if (orderData.customer.type === 'b2b') {
    await createCreditTermsOrder(orderData, customPricing);
    await notifyAccountManager(orderData.customer.accountManager);
  } else {
    await processImmediatePayment(orderData, customPricing);
  }
  
  // Sync to ERP and fulfillment systems
  await syncToERP(orderData, 'order_created');
  await triggerFulfillmentWorkflow(orderData);
  
  return {
    statusCode: 200,
    body: JSON.stringify({ 
      orderId: orderData.id,
      finalPrice: customPricing.total,
      estimatedDelivery: customPricing.delivery
    })
  };
};

export const handler = async (event) => {
  const inventoryUpdate = JSON.parse(event.body);
  
  // Handle inventory changes from any source
  if (inventoryUpdate.type === 'stock_change') {
    const { sku, quantity, location, reason } = inventoryUpdate;
    
    // Custom allocation logic the platform doesn't support
    const allocation = await calculateChannelAllocation({
      sku,
      totalQuantity: quantity,
      salesVelocity: await getSalesVelocityBySku(sku),
      channelPriority: await getChannelPriority(location),
      seasonalFactors: await getSeasonalTrends(sku)
    });
    
    // Update inventory across all channels simultaneously
    await Promise.all([
      updateMainWebstore(sku, allocation.webstore),
      updateMarketplaces(sku, allocation.marketplaces),
      updateRetailStores(sku, allocation.retail),
      updateB2BPortal(sku, allocation.b2b),
      updateAmazonFBA(sku, allocation.amazon),
      updateMercadoLibre(sku, allocation.mercadolibre)
    ]);
    
    // Handle low stock scenarios with custom rules
    if (allocation.total < 10) {
      await pauseLowPerformingChannels(sku);
      await notifyPurchasingTeam(sku, allocation.total);
      await adjustPricingForScarcity(sku);
    }
    
    // Sync to ERP and analytics
    await syncInventoryToERP(inventoryUpdate, allocation);
    await updateInventoryAnalytics(sku, allocation);
  }
  
  return { 
    statusCode: 200, 
    body: JSON.stringify({ 
      allocated: allocation,
      channelsUpdated: 6 
    })
  };
};

export const handler = async (event) => {
  const orderWebhook = JSON.parse(event.body);
  
  // Normalize orders from different marketplace formats
  const normalizedOrder = await normalizeMarketplaceOrder({
    source: orderWebhook.marketplace, // Amazon, MercadoLibre, eBay, etc.
    rawOrder: orderWebhook.data
  });
  
  // Apply marketplace-specific business rules
  const fulfillmentRules = await getMarketplaceFulfillmentRules(orderWebhook.marketplace);
  
  if (fulfillmentRules.requiresExpeditedShipping) {
    await reserveExpressShippingSlot(normalizedOrder);
    await upgradePackaging(normalizedOrder);
  }
  
  // Custom pricing and tax calculations per marketplace
  const finalPricing = await calculateMarketplaceSpecificPricing({
    order: normalizedOrder,
    marketplace: orderWebhook.marketplace,
    includeCommissions: true,
    applyPromotions: fulfillmentRules.promotions
  });
  
  // Coordinate fulfillment across multiple warehouses
  const optimalFulfillment = await optimizeFulfillmentRoute({
    order: normalizedOrder,
    marketplace: orderWebhook.marketplace,
    priorityLevel: fulfillmentRules.priority
  });
  
  // Sync to unified order management system
  await createUnifiedOrder(normalizedOrder, finalPricing, optimalFulfillment);
  
  // Marketplace-specific tracking and notifications
  await setupMarketplaceTracking(orderWebhook.marketplace, normalizedOrder.id);
  await notifyFulfillmentTeam(optimalFulfillment);
  
  return {
    statusCode: 200,
    body: JSON.stringify({
      unifiedOrderId: normalizedOrder.id,
      fulfillmentCenter: optimalFulfillment.warehouse,
      estimatedShipDate: optimalFulfillment.shipDate
    })
  };
};

export const handler = async (event) => {
  const analyticsEvent = JSON.parse(event.body);
  
  // Track custom e-commerce metrics the platform doesn't support
  if (analyticsEvent.type === 'purchase_completed') {
    const enrichedData = await enrichPurchaseData({
      order: analyticsEvent.order,
      customer: analyticsEvent.customer,
      channel: analyticsEvent.channel
    });
    
    // Custom attribution modeling across channels
    const attribution = await calculateCustomAttribution({
      customer: enrichedData.customer,
      touchpoints: enrichedData.touchpoints,
      timeframe: '30_days',
      weightingModel: 'time_decay_with_channel_preference'
    });
    
    // Calculate metrics not available in standard analytics
    const customMetrics = await calculateCustomMetrics({
      customerLifetimeValue: await predictCLV(enrichedData.customer),
      inventoryTurnover: await calculateInventoryTurn(enrichedData.order),
      profitMargin: await calculateTrueProfit(enrichedData.order),
      channelROAS: await calculateChannelROAS(attribution),
      seasonalTrends: await updateSeasonalTrends(enrichedData)
    });
    
    // Real-time business intelligence alerts
    if (customMetrics.profitMargin < 0.15) {
      await alertPricingTeam(enrichedData.order, customMetrics);
    }
    
    if (customMetrics.inventoryTurnover > 90) {
      await alertPurchasingTeam(enrichedData.order.items);
    }
    
    // Sync to custom dashboard and reports
    await updateExecutiveDashboard(customMetrics, attribution);
    await updateChannelPerformanceReport(attribution);
    await syncToBusinessIntelligence(enrichedData, customMetrics);
    
    // Trigger personalization engine
    await updateCustomerSegment(enrichedData.customer, customMetrics);
    await adjustRecommendationAlgorithm(enrichedData);
  }
  
  return {
    statusCode: 200,
    body: JSON.stringify({
      metrics: customMetrics,
      attribution: attribution,
      alertsTriggered: customMetrics.alertCount
    })
  };
};