package service

import (
	"context"

	"affiliate_dash/internal/model"
	"gorm.io/gorm"
)

type FulfillmentService struct {
	db             *gorm.DB
	callbacks      *CallbackService
	upstreamCancel func(order *model.FulfillmentOrder) error
	upstreamSync   func(ctx context.Context, order *model.FulfillmentOrder) (bool, error)
}

func NewFulfillmentService(db *gorm.DB, callbacks *CallbackService) *FulfillmentService {
	return &FulfillmentService{db: db, callbacks: callbacks}
}

// SetUpstreamCancel 注册取消订单时同步取消上游履约单的钩子（如乐玩 CancelOrder）。
func (s *FulfillmentService) SetUpstreamCancel(fn func(order *model.FulfillmentOrder) error) {
	s.upstreamCancel = fn
}

// SetUpstreamSync 注册主动查单同步上游状态的钩子（如乐玩订单补偿）。
func (s *FulfillmentService) SetUpstreamSync(fn func(ctx context.Context, order *model.FulfillmentOrder) (bool, error)) {
	s.upstreamSync = fn
}

func CanFulfill(order *model.FulfillmentOrder) (bool, string) {
	switch normalizeOrderStatus(order) {
	case model.OrderStatusPaid:
		return true, ""
	case model.OrderStatusShipFailed:
		if deliverySubmittedUpstream(order) {
			return false, "订单已提交上游，为避免重复发货请先确认上游状态"
		}
		return true, ""
	case model.OrderStatusDelivering:
		return false, "订单发货中"
	case model.OrderStatusDelivered:
		return false, "订单已交付"
	case model.OrderStatusCancelled:
		return false, "订单已取消"
	default:
		return false, "订单状态不可发货"
	}
}

func orderCallbackData(order *model.FulfillmentOrder) map[string]interface{} {
	canShip, cannotShipReason := CanFulfill(order)
	data := map[string]interface{}{
		"order_no":           order.OrderNo,
		"client_order_no":    order.ClientOrderNo,
		"product_sku":        order.ProductSKU,
		"quantity":           order.Quantity,
		"base_amount":        order.BaseAmount,
		"fee_type":           order.FeeType,
		"service_fee_amount": order.ServiceFeeAmount,
		"amount":             order.Amount,
		"currency":           order.Currency,
		"order_status":       normalizeOrderStatus(order),
		"order_source":       order.OrderSource,
		"can_ship":           canShip,
		"cannot_ship_reason": cannotShipReason,
		"provider_order_no":  order.ProviderOrderNo,
		"failure_reason":     order.FailureReason,
	}
	if requestData := requestDataMap(order.RequestData); len(requestData) > 0 {
		data["data"] = requestData
	}
	return data
}

// ----- 仪表盘统计 -----

// DashboardStats 仪表盘聚合指标。