修复订单金额落库不对的问题

internal/service/order/service.go

@@ -242,6 +242,7 @@ func (s *Service) CreateAdminOrder(ctx context.Context, req *dto.CreateAdminOrde
 	purchaseRole := ""
 	var sellerShopID *uint = resourceShopID
 	var sellerCostPrice int64
+	var itemCostPriceMap map[uint]int64 // 各套餐成本单价映射，用于 OrderItem.CostPrice 字段
 
 	// 根据支付方式分别处理
 	if req.PaymentMethod == model.PaymentMethodOffline {
@@ -249,7 +250,6 @@ func (s *Service) CreateAdminOrder(ctx context.Context, req *dto.CreateAdminOrde
 		if containsGift {
 			orderBuyerType = model.BuyerTypePersonal
 			orderBuyerID = 0
-			totalAmount = 0
 			paymentMethod = model.PaymentMethodOffline
 			paymentStatus = model.PaymentStatusPaid
 			paidAt = &now
@@ -286,8 +286,7 @@ func (s *Service) CreateAdminOrder(ctx context.Context, req *dto.CreateAdminOrde
 				}
 				orderBuyerType = model.BuyerTypeAgent
 				orderBuyerID = purchaseBuyerID
-				itemUnitPriceMap = buyerCostPriceMap
-				totalAmount = buyerTotalCost
+				itemCostPriceMap = buyerCostPriceMap
 				paymentMethod = model.PaymentMethodOffline
 				paymentStatus = model.PaymentStatusPaid
 				paidAt = purchasePaidAt
@@ -298,7 +297,7 @@ func (s *Service) CreateAdminOrder(ctx context.Context, req *dto.CreateAdminOrde
 				operatorID = nil
 				operatorType = constants.OwnerTypePlatform
 				purchaseRole = model.PurchaseRolePurchasedByPlatform
-				actualPaidAmount = nil
+				actualPaidAmount = &buyerTotalCost
 			}
 		}
 
@@ -320,8 +319,7 @@ func (s *Service) CreateAdminOrder(ctx context.Context, req *dto.CreateAdminOrde
 
 				orderBuyerType = model.BuyerTypeAgent
 				orderBuyerID = operatorShopID
-				itemUnitPriceMap = operatorCostPriceMap
-				totalAmount = operatorTotalCost
+				itemCostPriceMap = operatorCostPriceMap
 				paymentMethod = model.PaymentMethodWallet
 				paymentStatus = model.PaymentStatusPaid
 				paidAt = &now
@@ -336,13 +334,13 @@ func (s *Service) CreateAdminOrder(ctx context.Context, req *dto.CreateAdminOrde
 
 			} else {
 				// ==== 子场景 2.2：代理代购（给下级购买）====
-				// 获取买家成本价
-				buyerCostPriceMap, buyerTotalCost, err := s.buildCostPriceMap(ctx, validationResult.Packages, *resourceShopID)
+				// 获取买家成本价（买家的价格映射用于 CostPrice 快照，总价不再使用）
+				buyerCostPriceMap, _, err := s.buildCostPriceMap(ctx, validationResult.Packages, *resourceShopID)
 				if err != nil {
 					return nil, err
 				}
 
-				// 获取操作者成本价
+				// 获取操作者成本价（操作方实际扣款金额和佣金基准）
 				_, operatorTotalCost, err := s.buildCostPriceMap(ctx, validationResult.Packages, operatorShopID)
 				if err != nil {
 					return nil, err
@@ -350,8 +348,7 @@ func (s *Service) CreateAdminOrder(ctx context.Context, req *dto.CreateAdminOrde
 
 				orderBuyerType = model.BuyerTypeAgent
 				orderBuyerID = *resourceShopID
-				itemUnitPriceMap = buyerCostPriceMap
-				totalAmount = buyerTotalCost
+				itemCostPriceMap = buyerCostPriceMap
 				paymentMethod = model.PaymentMethodWallet
 				paymentStatus = model.PaymentStatusPaid
 				paidAt = &now
@@ -375,8 +372,7 @@ func (s *Service) CreateAdminOrder(ctx context.Context, req *dto.CreateAdminOrde
 
 			orderBuyerType = model.BuyerTypeAgent
 			orderBuyerID = targetShopID
-			itemUnitPriceMap = targetCostPriceMap
-			totalAmount = targetTotalCost
+			itemCostPriceMap = targetCostPriceMap
 			paymentMethod = model.PaymentMethodWallet
 			paymentStatus = model.PaymentStatusPaid
 			paidAt = &now
@@ -465,7 +461,7 @@ func (s *Service) CreateAdminOrder(ctx context.Context, req *dto.CreateAdminOrde
 		order.BuyerPhone, order.BuyerNickname = s.fetchBuyerSnapshot(ctx, orderBuyerID)
 	}
 
-	items := s.buildOrderItems(userID, validationResult.Packages, itemUnitPriceMap)
+	items := s.buildOrderItems(userID, validationResult.Packages, itemUnitPriceMap, itemCostPriceMap)
 
 	idempotencyKey := buildOrderIdempotencyKey(buyerType, buyerID, orderType, carrierType, carrierID, req.PackageIDs)
 
@@ -606,7 +602,8 @@ func (s *Service) CreateH5Order(ctx context.Context, req *dto.CreateOrderRequest
 	purchaseRole := ""
 	var sellerShopID *uint = resourceShopID
 	var sellerCostPrice int64
-	var expiresAt *time.Time // 待支付订单设置过期时间，立即支付的订单为 nil
+	var expiresAt *time.Time          // 待支付订单设置过期时间，立即支付的订单为 nil
+	var itemCostPriceMap map[uint]int64 // 各套餐成本单价映射，用于 OrderItem.CostPrice 字段
 
 	// 场景判断：offline（平台代购）、wallet（代理钱包支付）、其他（待支付）
 	if req.PaymentMethod == model.PaymentMethodOffline {
@@ -617,8 +614,7 @@ func (s *Service) CreateH5Order(ctx context.Context, req *dto.CreateOrderRequest
 		}
 		orderBuyerType = model.BuyerTypeAgent
 		orderBuyerID = purchaseBuyerID
-		itemUnitPriceMap = buyerCostPriceMap
-		totalAmount = buyerTotalCost
+		itemCostPriceMap = buyerCostPriceMap
 		paymentMethod = model.PaymentMethodOffline
 		paymentStatus = model.PaymentStatusPaid
 		paidAt = purchasePaidAt
@@ -629,7 +625,7 @@ func (s *Service) CreateH5Order(ctx context.Context, req *dto.CreateOrderRequest
 		operatorID = nil
 		operatorType = constants.OwnerTypePlatform
 		purchaseRole = model.PurchaseRolePurchasedByPlatform
-		actualPaidAmount = nil
+		actualPaidAmount = &buyerTotalCost
 
 	} else if req.PaymentMethod == model.PaymentMethodWallet {
 		// ==== 场景 2：代理钱包支付（wallet）====
@@ -653,8 +649,7 @@ func (s *Service) CreateH5Order(ctx context.Context, req *dto.CreateOrderRequest
 
 			orderBuyerType = model.BuyerTypeAgent
 			orderBuyerID = operatorShopID
-			itemUnitPriceMap = operatorCostPriceMap
-			totalAmount = operatorTotalCost
+			itemCostPriceMap = operatorCostPriceMap
 			paymentMethod = model.PaymentMethodWallet
 			paymentStatus = model.PaymentStatusPaid
 			paidAt = &now
@@ -669,13 +664,13 @@ func (s *Service) CreateH5Order(ctx context.Context, req *dto.CreateOrderRequest
 
 		} else {
 			// ==== 子场景 2.2：代理代购（给下级购买）====
-			// 获取买家成本价
-			buyerCostPriceMap, buyerTotalCost, err := s.buildCostPriceMap(ctx, validationResult.Packages, *resourceShopID)
+			// 获取买家成本价（价格映射用于 CostPrice 快照，总价不再使用）
+			buyerCostPriceMap, _, err := s.buildCostPriceMap(ctx, validationResult.Packages, *resourceShopID)
 			if err != nil {
 				return nil, err
 			}
 
-			// 获取操作者成本价
+			// 获取操作者成本价（操作方实际扣款金额和佣金基准）
 			_, operatorTotalCost, err := s.buildCostPriceMap(ctx, validationResult.Packages, operatorShopID)
 			if err != nil {
 				return nil, err
@@ -683,8 +678,7 @@ func (s *Service) CreateH5Order(ctx context.Context, req *dto.CreateOrderRequest
 
 			orderBuyerType = model.BuyerTypeAgent
 			orderBuyerID = *resourceShopID
-			itemUnitPriceMap = buyerCostPriceMap
-			totalAmount = buyerTotalCost
+			itemCostPriceMap = buyerCostPriceMap
 			paymentMethod = model.PaymentMethodWallet
 			paymentStatus = model.PaymentStatusPaid
 			paidAt = &now
@@ -750,7 +744,7 @@ func (s *Service) CreateH5Order(ctx context.Context, req *dto.CreateOrderRequest
 		PaymentConfigID:         h5PaymentConfigID,
 	}
 
-	items := s.buildOrderItems(userID, validationResult.Packages, itemUnitPriceMap)
+	items := s.buildOrderItems(userID, validationResult.Packages, itemUnitPriceMap, itemCostPriceMap)
 
 	idempotencyKey := buildOrderIdempotencyKey(buyerType, buyerID, req.OrderType, carrierType, carrierID, req.PackageIDs)
 
@@ -824,7 +818,9 @@ func (s *Service) resolvePurchaseOnBehalfInfo(ctx context.Context, result *purch
 	return *resourceShopID, buyerCostPriceMap, buyerTotalCost, &now, nil
 }
 
-func (s *Service) buildOrderItems(operatorID uint, packages []*model.Package, unitPriceMap map[uint]int64) []*model.OrderItem {
+// buildOrderItems 构建订单明细列表
+// retailPriceMap: 零售单价映射（UnitPrice），costPriceMap: 成本单价映射（CostPrice，无成本价时传 nil）
+func (s *Service) buildOrderItems(operatorID uint, packages []*model.Package, retailPriceMap map[uint]int64, costPriceMap map[uint]int64) []*model.OrderItem {
 	items := make([]*model.OrderItem, 0, len(packages))
 	for _, pkg := range packages {
 		if pkg == nil {
@@ -832,10 +828,15 @@ func (s *Service) buildOrderItems(operatorID uint, packages []*model.Package, un
 		}
 
 		unitPrice := packageprice.PackageEffectiveRetailPrice(pkg)
-		if price, ok := unitPriceMap[pkg.ID]; ok {
+		if price, ok := retailPriceMap[pkg.ID]; ok {
 			unitPrice = price
 		}
 
+		var costPrice int64
+		if costPriceMap != nil {
+			costPrice = costPriceMap[pkg.ID]
+		}
+
 		item := &model.OrderItem{
 			BaseModel: model.BaseModel{
 				Creator: operatorID,
@@ -846,6 +847,7 @@ func (s *Service) buildOrderItems(operatorID uint, packages []*model.Package, un
 			PackageType:              &pkg.PackageType,
 			Quantity:                 1,
 			UnitPrice:                unitPrice,
+			CostPrice:                costPrice,
 			Amount:                   unitPrice,
 			PackagePriceConfigStatus: pkg.PriceConfigStatus,
 			PackageIsGift:            pkg.IsGift,
@@ -2295,6 +2297,7 @@ func (s *Service) activateMainPackage(ctx context.Context, tx *gorm.DB, order *m
 
 	// 创建套餐使用记录
 	virtualTotalMBSnapshot, displayGainRatioSnapshot, enableVirtualDataSnapshot := model.BuildPackageUsageSnapshotValues(pkg)
+	retailAmount := order.TotalAmount
 	usage := &model.PackageUsage{
 		BaseModel: model.BaseModel{
 			Creator: order.Creator,
@@ -2314,6 +2317,7 @@ func (s *Service) activateMainPackage(ctx context.Context, tx *gorm.DB, order *m
 		DataResetCycle:            pkg.DataResetCycle,
 		PendingRealnameActivation: pendingRealnameActivation,
 		PaidAmount:                order.ActualPaidAmount,
+		RetailAmount:              &retailAmount,
 		PackagePriceConfigStatus:  pkg.PriceConfigStatus,
 		PackageIsGift:             pkg.IsGift,
 	}
@@ -2380,6 +2384,7 @@ func (s *Service) activateAddonPackage(ctx context.Context, tx *gorm.DB, order *
 	}
 
 	virtualTotalMBSnapshot, displayGainRatioSnapshot, enableVirtualDataSnapshot := model.BuildPackageUsageSnapshotValues(pkg)
+	addonRetailAmount := order.TotalAmount
 	usage := &model.PackageUsage{
 		BaseModel: model.BaseModel{
 			Creator: order.Creator,
@@ -2401,6 +2406,7 @@ func (s *Service) activateAddonPackage(ctx context.Context, tx *gorm.DB, order *
 		ExpiresAt:                 &expiresAt,
 		DataResetCycle:            pkg.DataResetCycle,
 		PaidAmount:                order.ActualPaidAmount,
+		RetailAmount:              &addonRetailAmount,
 		PackagePriceConfigStatus:  pkg.PriceConfigStatus,
 		PackageIsGift:             pkg.IsGift,
 	}