Complete Type System Fixes Applied

Summary

All TypeScript errors have been thoroughly resolved. The consolidated type system is now fully functional with proper type safety and no conflicts.

Issues Fixed

1. Export Conflicts and Missing Exports

✅ Added ProductOrderItem as legacy alias for OrderItemRequest
✅ Fixed catalog.ts to properly import and re-export unified types
✅ Resolved ItemClass and BillingCycle export conflicts between modules
✅ Fixed index.ts to export types in correct order to avoid conflicts

2. Enhanced Order Summary Type Issues

✅ Created explicit OrderItem interface with all required properties
✅ Fixed BillingCycle type conflict (product vs subscription types)
✅ Updated all pricing field references to use unified structure
✅ Proper type imports from domain package

3. Checkout Functions Updated

✅ buildInternetOrderItems() now uses InternetProduct and Product[]
✅ buildSimOrderItems() now uses SimProduct and Product[]
✅ All order item creation uses proper unified structure with required fields
✅ Removed legacy type references (InternetAddon, SimActivationFee, etc.)

4. Domain Package Structure

✅ product.ts - Core unified types with proper PricebookEntry representation
✅ order.ts - Updated order types with re-exports for convenience
✅ catalog.ts - Legacy aliases and proper re-exports
✅ index.ts - Explicit exports to avoid conflicts
✅ examples/unified-product-usage.ts - Updated to use correct types

Key Type Consolidations

Before (Multiple Conflicting Types)

// Multiple types for same data
interface CatalogItem { name, sku, monthlyPrice?, oneTimePrice?, type }
interface CatalogOrderItem { name, sku, monthlyPrice?, oneTimePrice?, type, autoAdded? }
interface OrderItem extends CatalogOrderItem { id?, price?, billingCycle?, description?, isAutoAdded? }
interface InternetPlan { tier, offeringType, monthlyPrice?, features, ... }

After (Unified Structure)

// Single source of truth
interface BaseProduct {
  id: string; // Product2.Id
  name: string; // Product2.Name
  sku: string; // Product2.StockKeepingUnit
  category: ProductCategory; // Product2Categories1__c
  itemClass: ItemClass; // Item_Class__c
  billingCycle: BillingCycle; // Billing_Cycle__c
  whmcsProductId: number; // WH_Product_ID__c
  // ... all other Salesforce fields
}

interface ProductWithPricing extends BaseProduct {
  pricebookEntry?: PricebookEntry;
  unitPrice?: number; // PricebookEntry.UnitPrice
  monthlyPrice?: number; // Derived from unitPrice + billingCycle
  oneTimePrice?: number; // Derived from unitPrice + billingCycle
}

interface OrderItemRequest extends ProductWithPricing {
  quantity: number;
  autoAdded?: boolean;
}

// Enhanced Order Summary now properly extends unified types
interface OrderItem {
  // All properties explicitly defined to avoid type resolution issues
  name: string;
  sku: string;
  itemClass: ItemClass;
  billingCycle: ProductBillingCycle; // Correct type (not subscription BillingCycle)
  unitPrice?: number;
  monthlyPrice?: number;
  oneTimePrice?: number;
  quantity: number;
  autoAdded?: boolean;
  // ... all other required fields
}

Transformation Functions

All transformation functions now properly handle the unified structure:

// Salesforce Product2 + PricebookEntry → Unified Product
function fromSalesforceProduct2(sfProduct: any, pricebookEntry?: any): Product;

// Salesforce OrderItem → Unified SalesforceOrderItem
function fromSalesforceOrderItem(sfOrderItem: any): SalesforceOrderItem;

Benefits Achieved

Type Safety: All properties properly typed with compile-time validation
No Conflicts: Resolved all export conflicts and ambiguous types
Consistent Pricing: Single pricing model based on PricebookEntry structure
Maintainability: Changes to Salesforce fields only need updates in one place
Backward Compatibility: Legacy type aliases maintained for existing code

Files Modified

✅ packages/domain/src/entities/product.ts - Core unified types
✅ packages/domain/src/entities/order.ts - Updated order types with re-exports
✅ packages/domain/src/entities/catalog.ts - Legacy aliases and clean exports
✅ packages/domain/src/entities/index.ts - Proper export order
✅ packages/domain/src/entities/checkout.ts - Updated to use unified types
✅ packages/domain/src/entities/examples/unified-product-usage.ts - Fixed examples
✅ apps/portal/src/features/catalog/components/base/EnhancedOrderSummary.tsx - Proper unified types

Verification

✅ 0 TypeScript errors across all modified files ✅ All imports resolved correctly ✅ Type safety maintained throughout the application ✅ Backward compatibility preserved with legacy aliases

The consolidated type system is now production-ready and eliminates the original problem of multiple types trying to represent the same Salesforce Product2 data.

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