package order

import (
	"context"
	"time"

	"github.com/break/junhong_cmp_fiber/internal/model"
	"github.com/break/junhong_cmp_fiber/internal/model/dto"
	packagepkg "github.com/break/junhong_cmp_fiber/internal/service/package"
	"github.com/break/junhong_cmp_fiber/internal/service/purchase_validation"
	"github.com/break/junhong_cmp_fiber/internal/store"
	"github.com/break/junhong_cmp_fiber/internal/store/postgres"
	"github.com/break/junhong_cmp_fiber/pkg/constants"
	"github.com/break/junhong_cmp_fiber/pkg/errors"
	"github.com/break/junhong_cmp_fiber/pkg/middleware"
	"github.com/break/junhong_cmp_fiber/pkg/queue"
	"github.com/break/junhong_cmp_fiber/pkg/wechat"
	"github.com/bytedance/sonic"
	"go.uber.org/zap"
	"gorm.io/gorm"
)

type Service struct {
	db                         *gorm.DB
	orderStore                 *postgres.OrderStore
	orderItemStore             *postgres.OrderItemStore
	walletStore                *postgres.WalletStore
	purchaseValidationService  *purchase_validation.Service
	shopPackageAllocationStore *postgres.ShopPackageAllocationStore
	shopSeriesAllocationStore  *postgres.ShopSeriesAllocationStore
	iotCardStore               *postgres.IotCardStore
	deviceStore                *postgres.DeviceStore
	packageSeriesStore         *postgres.PackageSeriesStore
	packageUsageStore          *postgres.PackageUsageStore
	packageStore               *postgres.PackageStore
	wechatPayment              wechat.PaymentServiceInterface
	queueClient                *queue.Client
	logger                     *zap.Logger
}

func New(
	db *gorm.DB,
	orderStore *postgres.OrderStore,
	orderItemStore *postgres.OrderItemStore,
	walletStore *postgres.WalletStore,
	purchaseValidationService *purchase_validation.Service,
	shopPackageAllocationStore *postgres.ShopPackageAllocationStore,
	shopSeriesAllocationStore *postgres.ShopSeriesAllocationStore,
	iotCardStore *postgres.IotCardStore,
	deviceStore *postgres.DeviceStore,
	packageSeriesStore *postgres.PackageSeriesStore,
	packageUsageStore *postgres.PackageUsageStore,
	packageStore *postgres.PackageStore,
	wechatPayment wechat.PaymentServiceInterface,
	queueClient *queue.Client,
	logger *zap.Logger,
) *Service {
	return &Service{
		db:                         db,
		orderStore:                 orderStore,
		orderItemStore:             orderItemStore,
		walletStore:                walletStore,
		purchaseValidationService:  purchaseValidationService,
		shopPackageAllocationStore: shopPackageAllocationStore,
		shopSeriesAllocationStore:  shopSeriesAllocationStore,
		iotCardStore:               iotCardStore,
		deviceStore:                deviceStore,
		packageSeriesStore:         packageSeriesStore,
		packageUsageStore:          packageUsageStore,
		packageStore:               packageStore,
		wechatPayment:              wechatPayment,
		queueClient:                queueClient,
		logger:                     logger,
	}
}

func (s *Service) Create(ctx context.Context, req *dto.CreateOrderRequest, buyerType string, buyerID uint) (*dto.OrderResponse, error) {
	var validationResult *purchase_validation.PurchaseValidationResult
	var err error

	if req.OrderType == model.OrderTypeSingleCard {
		if req.IotCardID == nil {
			return nil, errors.New(errors.CodeInvalidParam, "单卡购买必须指定IoT卡ID")
		}
		validationResult, err = s.purchaseValidationService.ValidateCardPurchase(ctx, *req.IotCardID, req.PackageIDs)
	} else if req.OrderType == model.OrderTypeDevice {
		if req.DeviceID == nil {
			return nil, errors.New(errors.CodeInvalidParam, "设备购买必须指定设备ID")
		}
		validationResult, err = s.purchaseValidationService.ValidateDevicePurchase(ctx, *req.DeviceID, req.PackageIDs)
	} else {
		return nil, errors.New(errors.CodeInvalidParam, "无效的订单类型")
	}

	if err != nil {
		return nil, err
	}

	forceRechargeCheck := s.checkForceRechargeRequirement(ctx, validationResult)
	if forceRechargeCheck.NeedForceRecharge && validationResult.TotalPrice < forceRechargeCheck.ForceRechargeAmount {
		return nil, errors.New(errors.CodeForceRechargeRequired, "首次购买需满足最低充值要求")
	}

	userID := middleware.GetUserIDFromContext(ctx)
	orderBuyerType := buyerType
	orderBuyerID := buyerID
	totalAmount := validationResult.TotalPrice
	paymentMethod := req.PaymentMethod
	paymentStatus := model.PaymentStatusPending
	var paidAt *time.Time
	isPurchaseOnBehalf := false

	var seriesID *uint
	var sellerShopID *uint
	var sellerCostPrice int64

	if validationResult.Card != nil {
		seriesID = validationResult.Card.SeriesID
		sellerShopID = validationResult.Card.ShopID
	} else if validationResult.Device != nil {
		seriesID = validationResult.Device.SeriesID
		sellerShopID = validationResult.Device.ShopID
	}

	if sellerShopID != nil && len(validationResult.Packages) > 0 {
		firstPackageID := validationResult.Packages[0].ID
		allocation, err := s.shopPackageAllocationStore.GetByShopAndPackage(ctx, *sellerShopID, firstPackageID)
		if err == nil && allocation != nil {
			sellerCostPrice = allocation.CostPrice
		}
	}

	if req.PaymentMethod == model.PaymentMethodOffline {
		purchaseBuyerID, buyerCostPrice, purchasePaidAt, err := s.resolvePurchaseOnBehalfInfo(ctx, validationResult)
		if err != nil {
			return nil, err
		}
		orderBuyerType = model.BuyerTypeAgent
		orderBuyerID = purchaseBuyerID
		totalAmount = buyerCostPrice
		paymentMethod = model.PaymentMethodOffline
		paymentStatus = model.PaymentStatusPaid
		paidAt = purchasePaidAt
		isPurchaseOnBehalf = true
		sellerCostPrice = buyerCostPrice
	}

	order := &model.Order{
		BaseModel: model.BaseModel{
			Creator: userID,
			Updater: userID,
		},
		OrderNo:                 s.orderStore.GenerateOrderNo(),
		OrderType:               req.OrderType,
		BuyerType:               orderBuyerType,
		BuyerID:                 orderBuyerID,
		IotCardID:               req.IotCardID,
		DeviceID:                req.DeviceID,
		TotalAmount:             totalAmount,
		PaymentMethod:           paymentMethod,
		PaymentStatus:           paymentStatus,
		PaidAt:                  paidAt,
		CommissionStatus:        model.CommissionStatusPending,
		CommissionConfigVersion: 0,
		SeriesID:                seriesID,
		SellerShopID:            sellerShopID,
		SellerCostPrice:         sellerCostPrice,
		IsPurchaseOnBehalf:      isPurchaseOnBehalf,
	}

	items := s.buildOrderItems(userID, validationResult.Packages)

	if req.PaymentMethod == model.PaymentMethodOffline {
		if err := s.createOrderWithActivation(ctx, order, items); err != nil {
			return nil, err
		}
		s.enqueueCommissionCalculation(ctx, order.ID)
		return s.buildOrderResponse(order, items), nil
	}

	if err := s.orderStore.Create(ctx, order, items); err != nil {
		return nil, err
	}

	return s.buildOrderResponse(order, items), nil
}

func (s *Service) resolvePurchaseOnBehalfInfo(ctx context.Context, result *purchase_validation.PurchaseValidationResult) (uint, int64, *time.Time, error) {
	var resourceShopID *uint
	var seriesID *uint

	if result.Card != nil {
		resourceShopID = result.Card.ShopID
		seriesID = result.Card.SeriesID
	} else if result.Device != nil {
		resourceShopID = result.Device.ShopID
		seriesID = result.Device.SeriesID
	}

	if resourceShopID == nil || *resourceShopID == 0 {
		return 0, 0, nil, errors.New(errors.CodeInvalidParam, "资源未分配给代理商，无法代购")
	}

	if seriesID == nil || *seriesID == 0 {
		return 0, 0, nil, errors.New(errors.CodeInvalidParam, "资源未关联套餐系列")
	}

	if len(result.Packages) == 0 {
		return 0, 0, nil, errors.New(errors.CodeInvalidParam, "订单中没有套餐")
	}

	firstPackageID := result.Packages[0].ID
	buyerAllocation, err := s.shopPackageAllocationStore.GetByShopAndPackage(ctx, *resourceShopID, firstPackageID)
	if err != nil {
		return 0, 0, nil, errors.New(errors.CodeInvalidParam, "买家没有该套餐的分配配置")
	}

	now := time.Now()
	return *resourceShopID, buyerAllocation.CostPrice, &now, nil
}

func (s *Service) buildOrderItems(operatorID uint, packages []*model.Package) []*model.OrderItem {
	items := make([]*model.OrderItem, 0, len(packages))
	for _, pkg := range packages {
		item := &model.OrderItem{
			BaseModel: model.BaseModel{
				Creator: operatorID,
				Updater: operatorID,
			},
			PackageID:   pkg.ID,
			PackageName: pkg.PackageName,
			Quantity:    1,
			UnitPrice:   pkg.SuggestedRetailPrice,
			Amount:      pkg.SuggestedRetailPrice,
		}
		items = append(items, item)
	}

	return items
}

func (s *Service) createOrderWithActivation(ctx context.Context, order *model.Order, items []*model.OrderItem) error {
	return s.db.WithContext(ctx).Transaction(func(tx *gorm.DB) error {
		if err := tx.Create(order).Error; err != nil {
			return errors.Wrap(errors.CodeDatabaseError, err, "创建代购订单失败")
		}

		for _, item := range items {
			item.OrderID = order.ID
		}
		if err := tx.CreateInBatches(items, 100).Error; err != nil {
			return errors.Wrap(errors.CodeDatabaseError, err, "创建订单明细失败")
		}

		return s.activatePackage(ctx, tx, order)
	})
}

func (s *Service) Get(ctx context.Context, id uint) (*dto.OrderResponse, error) {
	order, items, err := s.orderStore.GetByIDWithItems(ctx, id)
	if err != nil {
		if err == gorm.ErrRecordNotFound {
			return nil, errors.New(errors.CodeNotFound, "订单不存在")
		}
		return nil, err
	}

	return s.buildOrderResponse(order, items), nil
}

func (s *Service) List(ctx context.Context, req *dto.OrderListRequest, buyerType string, buyerID uint) (*dto.OrderListResponse, error) {
	page := req.Page
	pageSize := req.PageSize
	if page == 0 {
		page = 1
	}
	if pageSize == 0 {
		pageSize = constants.DefaultPageSize
	}

	opts := &store.QueryOptions{
		Page:     page,
		PageSize: pageSize,
	}

	filters := map[string]any{
		"buyer_type": buyerType,
		"buyer_id":   buyerID,
	}
	if req.PaymentStatus != nil {
		filters["payment_status"] = *req.PaymentStatus
	}
	if req.OrderType != "" {
		filters["order_type"] = req.OrderType
	}
	if req.OrderNo != "" {
		filters["order_no"] = req.OrderNo
	}
	if req.StartTime != nil {
		filters["start_time"] = req.StartTime
	}
	if req.EndTime != nil {
		filters["end_time"] = req.EndTime
	}

	orders, total, err := s.orderStore.List(ctx, opts, filters)
	if err != nil {
		return nil, err
	}

	var orderIDs []uint
	for _, o := range orders {
		orderIDs = append(orderIDs, o.ID)
	}

	itemsMap := make(map[uint][]*model.OrderItem)
	if len(orderIDs) > 0 {
		allItems, err := s.orderItemStore.ListByOrderIDs(ctx, orderIDs)
		if err != nil {
			return nil, err
		}
		for _, item := range allItems {
			itemsMap[item.OrderID] = append(itemsMap[item.OrderID], item)
		}
	}

	var list []*dto.OrderResponse
	for _, o := range orders {
		list = append(list, s.buildOrderResponse(o, itemsMap[o.ID]))
	}

	totalPages := int(total) / pageSize
	if int(total)%pageSize > 0 {
		totalPages++
	}

	return &dto.OrderListResponse{
		List:       list,
		Total:      total,
		Page:       page,
		PageSize:   pageSize,
		TotalPages: totalPages,
	}, nil
}

func (s *Service) Cancel(ctx context.Context, id uint, buyerType string, buyerID uint) error {
	order, err := s.orderStore.GetByID(ctx, id)
	if err != nil {
		if err == gorm.ErrRecordNotFound {
			return errors.New(errors.CodeNotFound, "订单不存在")
		}
		return err
	}

	if order.BuyerType != buyerType || order.BuyerID != buyerID {
		return errors.New(errors.CodeForbidden, "无权操作此订单")
	}

	if order.PaymentStatus != model.PaymentStatusPending {
		return errors.New(errors.CodeInvalidStatus, "只能取消待支付的订单")
	}

	return s.orderStore.UpdatePaymentStatus(ctx, id, model.PaymentStatusCancelled, nil)
}

func (s *Service) WalletPay(ctx context.Context, orderID uint, buyerType string, buyerID uint) error {
	order, err := s.orderStore.GetByID(ctx, orderID)
	if err != nil {
		if err == gorm.ErrRecordNotFound {
			return errors.New(errors.CodeNotFound, "订单不存在")
		}
		return err
	}

	if order.BuyerType != buyerType || order.BuyerID != buyerID {
		return errors.New(errors.CodeForbidden, "无权操作此订单")
	}

	if order.IsPurchaseOnBehalf {
		return errors.New(errors.CodeInvalidStatus, "代购订单无需支付")
	}

	var resourceType string
	var resourceID uint

	if buyerType == model.BuyerTypePersonal {
		if order.OrderType == model.OrderTypeSingleCard && order.IotCardID != nil {
			resourceType = "iot_card"
			resourceID = *order.IotCardID
		} else if order.OrderType == model.OrderTypeDevice && order.DeviceID != nil {
			resourceType = "device"
			resourceID = *order.DeviceID
		} else {
			return errors.New(errors.CodeInvalidParam, "无法确定钱包归属")
		}
	} else if buyerType == model.BuyerTypeAgent {
		resourceType = "shop"
		resourceID = buyerID
	} else {
		return errors.New(errors.CodeInvalidParam, "不支持的买家类型")
	}

	wallet, err := s.walletStore.GetByResourceTypeAndID(ctx, resourceType, resourceID, "main")
	if err != nil {
		if err == gorm.ErrRecordNotFound {
			return errors.New(errors.CodeWalletNotFound, "钱包不存在")
		}
		return err
	}

	if wallet.Balance < order.TotalAmount {
		return errors.New(errors.CodeInsufficientBalance, "余额不足")
	}

	now := time.Now()
	err = s.db.WithContext(ctx).Transaction(func(tx *gorm.DB) error {
		result := tx.Model(&model.Order{}).
			Where("id = ? AND payment_status = ?", orderID, model.PaymentStatusPending).
			Updates(map[string]any{
				"payment_status": model.PaymentStatusPaid,
				"payment_method": model.PaymentMethodWallet,
				"paid_at":        now,
			})
		if result.Error != nil {
			return errors.Wrap(errors.CodeDatabaseError, result.Error, "更新订单支付状态失败")
		}

		if result.RowsAffected == 0 {
			var currentOrder model.Order
			if err := tx.First(&currentOrder, orderID).Error; err != nil {
				return errors.Wrap(errors.CodeDatabaseError, err, "查询订单失败")
			}

			switch currentOrder.PaymentStatus {
			case model.PaymentStatusPaid:
				return nil
			case model.PaymentStatusCancelled:
				return errors.New(errors.CodeInvalidStatus, "订单已取消，无法支付")
			case model.PaymentStatusRefunded:
				return errors.New(errors.CodeInvalidStatus, "订单已退款，无法支付")
			default:
				return errors.New(errors.CodeInvalidStatus, "订单状态异常")
			}
		}

		walletResult := tx.Model(&model.Wallet{}).
			Where("id = ? AND balance >= ? AND version = ?", wallet.ID, order.TotalAmount, wallet.Version).
			Updates(map[string]any{
				"balance": gorm.Expr("balance - ?", order.TotalAmount),
				"version": gorm.Expr("version + 1"),
			})
		if walletResult.Error != nil {
			return errors.Wrap(errors.CodeDatabaseError, walletResult.Error, "扣减钱包余额失败")
		}
		if walletResult.RowsAffected == 0 {
			return errors.New(errors.CodeInsufficientBalance, "余额不足或并发冲突")
		}

		return s.activatePackage(ctx, tx, order)
	})

	if err != nil {
		return err
	}

	s.enqueueCommissionCalculation(ctx, orderID)
	return nil
}

func (s *Service) HandlePaymentCallback(ctx context.Context, orderNo string, paymentMethod string) error {
	order, err := s.orderStore.GetByOrderNo(ctx, orderNo)
	if err != nil {
		if err == gorm.ErrRecordNotFound {
			return errors.New(errors.CodeNotFound, "订单不存在")
		}
		return err
	}

	now := time.Now()
	err = s.db.WithContext(ctx).Transaction(func(tx *gorm.DB) error {
		result := tx.Model(&model.Order{}).
			Where("id = ? AND payment_status = ?", order.ID, model.PaymentStatusPending).
			Updates(map[string]any{
				"payment_status": model.PaymentStatusPaid,
				"payment_method": paymentMethod,
				"paid_at":        now,
			})
		if result.Error != nil {
			return errors.Wrap(errors.CodeDatabaseError, result.Error, "更新订单支付状态失败")
		}

		if result.RowsAffected == 0 {
			var currentOrder model.Order
			if err := tx.First(&currentOrder, order.ID).Error; err != nil {
				return errors.Wrap(errors.CodeDatabaseError, err, "查询订单失败")
			}

			switch currentOrder.PaymentStatus {
			case model.PaymentStatusPaid:
				return nil
			case model.PaymentStatusCancelled:
				return errors.New(errors.CodeInvalidStatus, "订单已取消，无法支付")
			case model.PaymentStatusRefunded:
				return errors.New(errors.CodeInvalidStatus, "订单已退款，无法支付")
			default:
				return errors.New(errors.CodeInvalidStatus, "订单状态异常")
			}
		}

		return s.activatePackage(ctx, tx, order)
	})

	if err != nil {
		return err
	}

	s.enqueueCommissionCalculation(ctx, order.ID)
	return nil
}

func (s *Service) activatePackage(ctx context.Context, tx *gorm.DB, order *model.Order) error {
	var items []*model.OrderItem
	if err := tx.Where("order_id = ?", order.ID).Find(&items).Error; err != nil {
		return errors.Wrap(errors.CodeDatabaseError, err, "查询订单明细失败")
	}

	// 任务 8.1: 检查混买限制 - 禁止同订单混买正式套餐和加油包
	if err := s.validatePackageTypeMix(tx, items); err != nil {
		return err
	}

	// 确定载体类型和ID
	carrierType := "iot_card"
	var carrierID uint
	if order.OrderType == model.OrderTypeSingleCard && order.IotCardID != nil {
		carrierID = *order.IotCardID
	} else if order.OrderType == model.OrderTypeDevice && order.DeviceID != nil {
		carrierType = "device"
		carrierID = *order.DeviceID
	} else {
		return errors.New(errors.CodeInvalidParam, "无效的订单类型或缺少载体ID")
	}

	now := time.Now()
	for _, item := range items {
		// 检查是否已存在使用记录
		var existingUsage model.PackageUsage
		err := tx.Where("order_id = ? AND package_id = ?", order.ID, item.PackageID).
			First(&existingUsage).Error
		if err == nil {
			s.logger.Warn("套餐使用记录已存在，跳过创建",
				zap.Uint("order_id", order.ID),
				zap.Uint("package_id", item.PackageID))
			continue
		}
		if err != gorm.ErrRecordNotFound {
			return errors.Wrap(errors.CodeDatabaseError, err, "检查套餐使用记录失败")
		}

		// 查询套餐信息
		var pkg model.Package
		if err := tx.First(&pkg, item.PackageID).Error; err != nil {
			return errors.Wrap(errors.CodeDatabaseError, err, "查询套餐信息失败")
		}

		// 根据套餐类型分别处理
		if pkg.PackageType == "formal" {
			// 主套餐处理逻辑（任务 8.2-8.4）
			if err := s.activateMainPackage(ctx, tx, order, &pkg, carrierType, carrierID, now); err != nil {
				return err
			}
		} else if pkg.PackageType == "addon" {
			// 加油包处理逻辑（任务 8.5-8.7）
			if err := s.activateAddonPackage(ctx, tx, order, &pkg, carrierType, carrierID, now); err != nil {
				return err
			}
		}
	}

	return nil
}

// validatePackageTypeMix 任务 8.1: 检查混买限制
func (s *Service) validatePackageTypeMix(tx *gorm.DB, items []*model.OrderItem) error {
	hasFormal := false
	hasAddon := false

	for _, item := range items {
		var pkg model.Package
		if err := tx.First(&pkg, item.PackageID).Error; err != nil {
			return errors.Wrap(errors.CodeDatabaseError, err, "查询套餐信息失败")
		}

		if pkg.PackageType == "formal" {
			hasFormal = true
		} else if pkg.PackageType == "addon" {
			hasAddon = true
		}

		if hasFormal && hasAddon {
			return errors.New(errors.CodeInvalidParam, "不允许在同一订单中同时购买正式套餐和加油包")
		}
	}

	return nil
}

// activateMainPackage 任务 8.2-8.4: 主套餐激活逻辑
func (s *Service) activateMainPackage(ctx context.Context, tx *gorm.DB, order *model.Order, pkg *model.Package, carrierType string, carrierID uint, now time.Time) error {
	// 检查是否有生效中主套餐
	var activeMainPackage model.PackageUsage
	err := tx.Where("status = ?", constants.PackageUsageStatusActive).
		Where("master_usage_id IS NULL").
		Where(carrierType+"_id = ?", carrierID).
		Order("priority ASC").
		First(&activeMainPackage).Error

	hasActiveMain := err == nil

	var status int
	var priority int
	var activatedAt time.Time
	var expiresAt time.Time
	var nextResetAt *time.Time
	var pendingRealnameActivation bool

	if hasActiveMain {
		// 任务 8.3: 有生效中主套餐，新套餐排队
		status = constants.PackageUsageStatusPending
		// 查询当前最大优先级
		var maxPriority int
		tx.Model(&model.PackageUsage{}).
			Where(carrierType+"_id = ?", carrierID).
			Select("COALESCE(MAX(priority), 0)").
			Scan(&maxPriority)
		priority = maxPriority + 1
		// 排队套餐暂不设置激活时间和过期时间（由激活任务处理）
	} else {
		// 任务 8.4: 无生效中主套餐，立即激活
		status = constants.PackageUsageStatusActive
		priority = 1
		activatedAt = now
		// 使用工具函数计算过期时间
		expiresAt = packagepkg.CalculateExpiryTime(pkg.CalendarType, activatedAt, pkg.DurationMonths, pkg.DurationDays)
		// 计算下次重置时间
		// TODO: 从运营商表读取 billing_day（任务 1.5 待实现）
		// 暂时使用默认值：联通=27，其他=1
		billingDay := 1 // 默认1号计费
		if carrierType == "iot_card" {
			var card model.IotCard
			if err := tx.First(&card, carrierID).Error; err == nil {
				var carrier model.Carrier
				if err := tx.First(&carrier, card.CarrierID).Error; err == nil {
					if carrier.CarrierType == "CUCC" {
						billingDay = 27 // 联通27号计费
					}
				}
			}
		}
		nextResetAt = packagepkg.CalculateNextResetTime(pkg.DataResetCycle, now, billingDay)
	}

	// 任务 8.9: 后台囤货场景
	if pkg.EnableRealnameActivation {
		// 需要实名后才能激活
		status = constants.PackageUsageStatusPending
		pendingRealnameActivation = true
	}

	// 创建套餐使用记录
	usage := &model.PackageUsage{
		BaseModel: model.BaseModel{
			Creator: order.Creator,
			Updater: order.Creator,
		},
		OrderID:                   order.ID,
		PackageID:                 pkg.ID,
		UsageType:                 order.OrderType,
		DataLimitMB:               pkg.RealDataMB,
		Status:                    status,
		Priority:                  priority,
		DataResetCycle:            pkg.DataResetCycle,
		PendingRealnameActivation: pendingRealnameActivation,
	}

	if carrierType == "iot_card" {
		usage.IotCardID = carrierID
	} else {
		usage.DeviceID = carrierID
	}

	if status == constants.PackageUsageStatusActive {
		usage.ActivatedAt = activatedAt
		usage.ExpiresAt = expiresAt
		usage.NextResetAt = nextResetAt
	}

	// 创建套餐使用记录（两步处理零值问题）
	if err := tx.Omit("status", "pending_realname_activation").Create(usage).Error; err != nil {
		return errors.Wrap(errors.CodeDatabaseError, err, "创建主套餐使用记录失败")
	}
	// 明确更新零值字段
	if err := tx.Model(usage).Updates(map[string]interface{}{
		"status":                      usage.Status,
		"pending_realname_activation": usage.PendingRealnameActivation,
	}).Error; err != nil {
		return errors.Wrap(errors.CodeDatabaseError, err, "更新主套餐状态失败")
	}

	return nil
}

// activateAddonPackage 任务 8.5-8.7: 加油包激活逻辑
func (s *Service) activateAddonPackage(ctx context.Context, tx *gorm.DB, order *model.Order, pkg *model.Package, carrierType string, carrierID uint, now time.Time) error {
	// 任务 8.5-8.6: 检查是否有主套餐（status IN (0,1)）
	var mainPackage model.PackageUsage
	err := tx.Where("status IN ?", []int{constants.PackageUsageStatusPending, constants.PackageUsageStatusActive}).
		Where("master_usage_id IS NULL").
		Where(carrierType+"_id = ?", carrierID).
		Order("priority ASC").
		First(&mainPackage).Error

	if err == gorm.ErrRecordNotFound {
		return errors.New(errors.CodeInvalidParam, "必须有主套餐才能购买加油包")
	}
	if err != nil {
		return errors.Wrap(errors.CodeDatabaseError, err, "查询主套餐失败")
	}

	// 任务 8.7: 创建加油包，绑定到主套餐
	// 查询当前最大优先级（加油包优先级低于主套餐）
	var maxPriority int
	tx.Model(&model.PackageUsage{}).
		Where(carrierType+"_id = ?", carrierID).
		Select("COALESCE(MAX(priority), 0)").
		Scan(&maxPriority)
	priority := maxPriority + 1

	// 加油包立即生效
	status := constants.PackageUsageStatusActive
	activatedAt := now

	// 计算过期时间（根据 has_independent_expiry）
	var expiresAt time.Time
	// 注意：has_independent_expiry 字段在 Package 模型中，暂时使用默认行为
	// 默认加油包跟随主套餐过期
	expiresAt = mainPackage.ExpiresAt

	usage := &model.PackageUsage{
		BaseModel: model.BaseModel{
			Creator: order.Creator,
			Updater: order.Creator,
		},
		OrderID:        order.ID,
		PackageID:      pkg.ID,
		UsageType:      order.OrderType,
		DataLimitMB:    pkg.RealDataMB,
		Status:         status,
		Priority:       priority,
		MasterUsageID:  &mainPackage.ID,
		ActivatedAt:    activatedAt,
		ExpiresAt:      expiresAt,
		DataResetCycle: pkg.DataResetCycle,
	}

	if carrierType == "iot_card" {
		usage.IotCardID = carrierID
	} else {
		usage.DeviceID = carrierID
	}

	// 创建加油包使用记录（加油包 status=1，不需要处理零值）
	if err := tx.Create(usage).Error; err != nil {
		return errors.Wrap(errors.CodeDatabaseError, err, "创建加油包使用记录失败")
	}

	return nil
}

func (s *Service) enqueueCommissionCalculation(ctx context.Context, orderID uint) {
	if s.queueClient == nil {
		s.logger.Warn("队列客户端未初始化，跳过佣金计算任务入队", zap.Uint("order_id", orderID))
		return
	}

	payload := map[string]interface{}{
		"order_id": orderID,
	}

	payloadBytes, err := sonic.Marshal(payload)
	if err != nil {
		s.logger.Error("佣金计算任务载荷序列化失败",
			zap.Uint("order_id", orderID),
			zap.Error(err))
		return
	}

	if err := s.queueClient.EnqueueTask(ctx, constants.TaskTypeCommission, payloadBytes); err != nil {
		s.logger.Error("佣金计算任务入队失败",
			zap.Uint("order_id", orderID),
			zap.Error(err),
			zap.String("task_type", constants.TaskTypeCommission))
		return
	}

	s.logger.Info("佣金计算任务已入队",
		zap.Uint("order_id", orderID),
		zap.String("task_type", constants.TaskTypeCommission))
}

func (s *Service) buildOrderResponse(order *model.Order, items []*model.OrderItem) *dto.OrderResponse {
	var itemResponses []*dto.OrderItemResponse
	for _, item := range items {
		itemResponses = append(itemResponses, &dto.OrderItemResponse{
			ID:          item.ID,
			PackageID:   item.PackageID,
			PackageName: item.PackageName,
			Quantity:    item.Quantity,
			UnitPrice:   item.UnitPrice,
			Amount:      item.Amount,
		})
	}

	statusText := ""
	switch order.PaymentStatus {
	case model.PaymentStatusPending:
		statusText = "待支付"
	case model.PaymentStatusPaid:
		statusText = "已支付"
	case model.PaymentStatusCancelled:
		statusText = "已取消"
	case model.PaymentStatusRefunded:
		statusText = "已退款"
	}

	return &dto.OrderResponse{
		ID:                      order.ID,
		OrderNo:                 order.OrderNo,
		OrderType:               order.OrderType,
		BuyerType:               order.BuyerType,
		BuyerID:                 order.BuyerID,
		IotCardID:               order.IotCardID,
		DeviceID:                order.DeviceID,
		TotalAmount:             order.TotalAmount,
		PaymentMethod:           order.PaymentMethod,
		PaymentStatus:           order.PaymentStatus,
		PaymentStatusText:       statusText,
		PaidAt:                  order.PaidAt,
		IsPurchaseOnBehalf:      order.IsPurchaseOnBehalf,
		CommissionStatus:        order.CommissionStatus,
		CommissionConfigVersion: order.CommissionConfigVersion,
		Items:                   itemResponses,
		CreatedAt:               order.CreatedAt,
		UpdatedAt:               order.UpdatedAt,
	}
}

// WechatPayJSAPI 发起微信 JSAPI 支付
func (s *Service) WechatPayJSAPI(ctx context.Context, orderID uint, openID string, buyerType string, buyerID uint) (*dto.WechatPayJSAPIResponse, error) {
	if s.wechatPayment == nil {
		s.logger.Error("微信支付服务未配置")
		return nil, errors.New(errors.CodeWechatPayFailed, "微信支付服务未配置")
	}

	order, err := s.orderStore.GetByID(ctx, orderID)
	if err != nil {
		if err == gorm.ErrRecordNotFound {
			return nil, errors.New(errors.CodeNotFound, "订单不存在")
		}
		return nil, errors.Wrap(errors.CodeInternalError, err, "查询订单失败")
	}

	if order.BuyerType != buyerType || order.BuyerID != buyerID {
		return nil, errors.New(errors.CodeForbidden, "无权操作此订单")
	}

	if order.PaymentStatus != model.PaymentStatusPending {
		return nil, errors.New(errors.CodeInvalidStatus, "订单状态不允许支付")
	}

	items, err := s.orderItemStore.ListByOrderIDs(ctx, []uint{orderID})
	if err != nil {
		return nil, errors.Wrap(errors.CodeInternalError, err, "查询订单明细失败")
	}
	description := "套餐购买"
	if len(items) > 0 {
		description = items[0].PackageName
	}

	result, err := s.wechatPayment.CreateJSAPIOrder(ctx, order.OrderNo, description, openID, int(order.TotalAmount))
	if err != nil {
		s.logger.Error("创建 JSAPI 支付失败",
			zap.Uint("order_id", orderID),
			zap.String("order_no", order.OrderNo),
			zap.Error(err),
		)
		return nil, err
	}

	s.logger.Info("创建 JSAPI 支付成功",
		zap.Uint("order_id", orderID),
		zap.String("order_no", order.OrderNo),
		zap.String("prepay_id", result.PrepayID),
	)

	payConfig, _ := result.PayConfig.(map[string]interface{})
	return &dto.WechatPayJSAPIResponse{
		PrepayID:  result.PrepayID,
		PayConfig: payConfig,
	}, nil
}

// WechatPayH5 发起微信 H5 支付
func (s *Service) WechatPayH5(ctx context.Context, orderID uint, sceneInfo *dto.WechatH5SceneInfo, buyerType string, buyerID uint) (*dto.WechatPayH5Response, error) {
	if s.wechatPayment == nil {
		s.logger.Error("微信支付服务未配置")
		return nil, errors.New(errors.CodeWechatPayFailed, "微信支付服务未配置")
	}

	order, err := s.orderStore.GetByID(ctx, orderID)
	if err != nil {
		if err == gorm.ErrRecordNotFound {
			return nil, errors.New(errors.CodeNotFound, "订单不存在")
		}
		return nil, errors.Wrap(errors.CodeInternalError, err, "查询订单失败")
	}

	if order.BuyerType != buyerType || order.BuyerID != buyerID {
		return nil, errors.New(errors.CodeForbidden, "无权操作此订单")
	}

	if order.PaymentStatus != model.PaymentStatusPending {
		return nil, errors.New(errors.CodeInvalidStatus, "订单状态不允许支付")
	}

	items, err := s.orderItemStore.ListByOrderIDs(ctx, []uint{orderID})
	if err != nil {
		return nil, errors.Wrap(errors.CodeInternalError, err, "查询订单明细失败")
	}
	description := "套餐购买"
	if len(items) > 0 {
		description = items[0].PackageName
	}

	h5SceneInfo := &wechat.H5SceneInfo{
		PayerClientIP: sceneInfo.PayerClientIP,
		H5Type:        sceneInfo.H5Info.Type,
	}

	result, err := s.wechatPayment.CreateH5Order(ctx, order.OrderNo, description, int(order.TotalAmount), h5SceneInfo)
	if err != nil {
		s.logger.Error("创建 H5 支付失败",
			zap.Uint("order_id", orderID),
			zap.String("order_no", order.OrderNo),
			zap.Error(err),
		)
		return nil, err
	}

	s.logger.Info("创建 H5 支付成功",
		zap.Uint("order_id", orderID),
		zap.String("order_no", order.OrderNo),
		zap.String("h5_url", result.H5URL),
	)

	return &dto.WechatPayH5Response{
		H5URL: result.H5URL,
	}, nil
}

type ForceRechargeRequirement struct {
	NeedForceRecharge   bool
	ForceRechargeAmount int64
	TriggerType         string
}

// checkForceRechargeRequirement 检查强充要求
// 从 PackageSeries 获取一次性佣金配置，使用 per-series 追踪判断是否需要强充
func (s *Service) checkForceRechargeRequirement(ctx context.Context, result *purchase_validation.PurchaseValidationResult) *ForceRechargeRequirement {
	defaultResult := &ForceRechargeRequirement{NeedForceRecharge: false}

	// 1. 获取 seriesID
	var seriesID *uint
	var firstCommissionPaid bool

	if result.Card != nil {
		seriesID = result.Card.SeriesID
		if seriesID != nil {
			firstCommissionPaid = result.Card.IsFirstRechargeTriggeredBySeries(*seriesID)
		}
	} else if result.Device != nil {
		seriesID = result.Device.SeriesID
		if seriesID != nil {
			firstCommissionPaid = result.Device.IsFirstRechargeTriggeredBySeries(*seriesID)
		}
	}

	if seriesID == nil {
		return defaultResult
	}

	// 2. 从 PackageSeries 获取一次性佣金配置
	series, err := s.packageSeriesStore.GetByID(ctx, *seriesID)
	if err != nil {
		s.logger.Warn("查询套餐系列失败", zap.Uint("series_id", *seriesID), zap.Error(err))
		return defaultResult
	}

	config, err := series.GetOneTimeCommissionConfig()
	if err != nil || config == nil || !config.Enable {
		return defaultResult
	}

	// 3. 如果该系列的一次性佣金已发放，无需强充
	if firstCommissionPaid {
		return defaultResult
	}

	// 4. 根据触发类型判断是否需要强充
	if config.TriggerType == model.OneTimeCommissionTriggerFirstRecharge {
		return &ForceRechargeRequirement{
			NeedForceRecharge:   true,
			ForceRechargeAmount: config.Threshold,
			TriggerType:         model.OneTimeCommissionTriggerFirstRecharge,
		}
	}

	// 5. 累计充值模式，检查是否启用强充
	if config.EnableForceRecharge {
		forceAmount := config.ForceAmount
		if forceAmount == 0 {
			forceAmount = config.Threshold
		}
		return &ForceRechargeRequirement{
			NeedForceRecharge:   true,
			ForceRechargeAmount: forceAmount,
			TriggerType:         model.OneTimeCommissionTriggerAccumulatedRecharge,
		}
	}

	return defaultResult
}

func (s *Service) GetPurchaseCheck(ctx context.Context, req *dto.PurchaseCheckRequest) (*dto.PurchaseCheckResponse, error) {
	var validationResult *purchase_validation.PurchaseValidationResult
	var err error

	if req.OrderType == model.OrderTypeSingleCard {
		validationResult, err = s.purchaseValidationService.ValidateCardPurchase(ctx, req.ResourceID, req.PackageIDs)
	} else if req.OrderType == model.OrderTypeDevice {
		validationResult, err = s.purchaseValidationService.ValidateDevicePurchase(ctx, req.ResourceID, req.PackageIDs)
	} else {
		return nil, errors.New(errors.CodeInvalidParam, "无效的订单类型")
	}

	if err != nil {
		return nil, err
	}

	forceRechargeCheck := s.checkForceRechargeRequirement(ctx, validationResult)

	response := &dto.PurchaseCheckResponse{
		TotalPackageAmount:  validationResult.TotalPrice,
		NeedForceRecharge:   forceRechargeCheck.NeedForceRecharge,
		ForceRechargeAmount: forceRechargeCheck.ForceRechargeAmount,
		ActualPayment:       validationResult.TotalPrice,
		WalletCredit:        validationResult.TotalPrice,
	}

	if forceRechargeCheck.NeedForceRecharge {
		if validationResult.TotalPrice < forceRechargeCheck.ForceRechargeAmount {
			response.ActualPayment = forceRechargeCheck.ForceRechargeAmount
			response.WalletCredit = forceRechargeCheck.ForceRechargeAmount
			response.Message = "首次购买需满足最低充值要求"
		}
	}

	return response, nil
}