package order

import (
	"errors"
	logger "eta/eta_mini_ht_api/common/component/log"
	"eta/eta_mini_ht_api/common/exception"
	"eta/eta_mini_ht_api/common/utils/page"
	productService "eta/eta_mini_ht_api/domian/merchant"
	orderService "eta/eta_mini_ht_api/domian/order"
	userService "eta/eta_mini_ht_api/domian/user"
	"eta/eta_mini_ht_api/service/user"
	"fmt"
	"gorm.io/gorm"
	"sync"
	"time"
)

const (
	permanentlyValid = "永久有效"
)

type ProductOrderInfo struct {
	Buyer       BuyerInfo   `json:"buyer"`
	ProductInfo ProductInfo `json:"productInfo"`
	OrderNo     string      `json:"orderNo"`
}
type ProductInfo struct {
	Name          string
	Type          string
	Price         string
	ValidDuration string
}
type BuyerInfo struct {
	Name     string
	Mobile   string
	AreaCode string
}

func GenerateProductOrderNo() string {
	return orderService.GenerateProductOrderNo()
}
func CreateProductOrder(templateUser user.User, productId int, orderNo string) (orderInfo ProductOrderInfo, err error) {
	if productId <= 0 {
		err = exception.New(exception.IllegalProductId)
	}
	productInfo, err := productService.GetMerchantProductById(productId)
	if err != nil {
		err = exception.NewWithException(exception.ProductInfoError, err.Error())
		return
	}
	officialUser, err := userService.GetUserByTemplateUserId(templateUser.Id)
	if err != nil {
		if errors.Is(err, gorm.ErrRecordNotFound) {
			err = exception.New(exception.OfficialUserNotFound)
		} else {
			err = exception.NewWithException(exception.OfficialUserFoundError, err.Error())
		}
		return
	}
	orderNo, err = orderService.CreateProductOrder(orderService.ProductOrderDTO{
		OrderID:     orderNo,
		UserID:      templateUser.Id,
		ProductID:   productId,
		TotalAmount: productInfo.Price.String(),
	})
	if err != nil {
		logger.Error("创建订单失败:%v", err)
		if errors.Is(err, gorm.ErrDuplicatedKey) {
			err = exception.NewWithException(exception.SubscribeFailed, "请勿重复下单")
			return
		}
		err = exception.NewWithException(exception.SubscribeFailed, err.Error())
		return
	}
	buyer := BuyerInfo{
		Name:     officialUser.RealName,
		Mobile:   templateUser.Mobile,
		AreaCode: templateUser.AreaCode,
	}
	var duration string
	if !productInfo.IsPermanent {
		beginDate := time.Now().Format(time.DateOnly)
		endDate := time.Now().Add(time.Duration(productInfo.ValidDays*24) * time.Hour).Format(time.DateOnly)
		duration = fmt.Sprintf("%s~%s", beginDate, endDate)
	} else {
		duration = permanentlyValid
	}
	product := ProductInfo{
		Name:          productInfo.Title,
		Type:          productInfo.Type,
		Price:         productInfo.Price.String(),
		ValidDuration: duration,
	}
	orderInfo = ProductOrderInfo{
		Buyer:       buyer,
		ProductInfo: product,
		OrderNo:     orderNo,
	}
	return
}

func GetTotalPageCountByUserId(userId int, orderStatus string) (total int64, latestId int64) {
	return orderService.GetTotalPageCountByUserId(userId, orderStatus)
}

func GetOrderPage(pageInfo page.PageInfo, userId int, orderStatus string) (orderList []orderService.ProductOrderDTO, err error) {
	orderList, err = orderService.GetOrderPage(pageInfo, userId, orderStatus)
	if err != nil {
		err = exception.NewWithException(exception.GetOrderListFailed, err.Error())
	}
	var wg sync.WaitGroup
	wg.Add(len(orderList))
	logger.Info("获取产品信息")
	for i := 0; i < len(orderList); i++ {
		go func(order *orderService.ProductOrderDTO) {
			defer wg.Done()
			product, pdErr := productService.GetMerchantProductById(order.ProductID)
			if pdErr != nil {
				logger.Error("获取产品信息失败：%v", err)
			}
			order.ProductName = product.Title
		}(&orderList[i])
	}
	wg.Wait()
	return
}

func GetOrderDetail(productId int, userId int) (order orderService.ProductOrderDetailDTO, err error) {
	order, err = orderService.GetOrderDetail(productId, userId)
	productInfo, err := productService.GetMerchantProductById(order.ProductID)
	if err != nil {
		return
	}
	order.ProductName = productInfo.Title
	order.ProductPrice = productInfo.Price.String()
	return
}