package logic

import (
	"errors"
	"fmt"
	"fusenapi/model/gmodel"
	"fusenapi/utils/auth"
	"fusenapi/utils/basic"
	"gorm.io/gorm"
	"strings"
	"time"

	"context"

	"fusenapi/server/shopping-cart-confirmation/internal/svc"
	"fusenapi/server/shopping-cart-confirmation/internal/types"

	"github.com/zeromicro/go-zero/core/logx"
)

type CartOrderDetailLogic struct {
	logx.Logger
	ctx    context.Context
	svcCtx *svc.ServiceContext
}

func NewCartOrderDetailLogic(ctx context.Context, svcCtx *svc.ServiceContext) *CartOrderDetailLogic {
	return &CartOrderDetailLogic{
		Logger: logx.WithContext(ctx),
		ctx:    ctx,
		svcCtx: svcCtx,
	}
}

func (l *CartOrderDetailLogic) CartOrderDetail(req *types.CartOrderDetailReq, userinfo *auth.UserInfo) (resp *basic.Response) {
	if userinfo.GetIdType() != auth.IDTYPE_User {
		return resp.SetStatusWithMessage(basic.CodeUnAuth, "please login first")
	}
	req.Sn = strings.Trim(req.Sn, " ")
	if req.Sn == "" {
		return resp.SetStatusWithMessage(basic.CodeRequestParamsErr, "param sn is required")
	}
	//获取订单数据
	orderModel := gmodel.NewFsOrderModel(l.svcCtx.MysqlConn)
	orderInfo, err := orderModel.FindOneBySn(l.ctx, userinfo.UserId, req.Sn)
	if err != nil {
		if errors.Is(err, gorm.ErrRecordNotFound) {
			return resp.SetStatusWithMessage(basic.CodeDbRecordNotFoundErr, "the order is not exists")
		}
		logx.Error(err)
		return resp.SetStatusWithMessage(basic.CodeServiceErr, "failed to get order info")
	}
	//获取订单详细数据
	orderDetailModel := gmodel.NewFsOrderDetailModel(l.svcCtx.MysqlConn)
	orderDetailList, err := orderDetailModel.GetOrderDetailsByOrderId(l.ctx, orderInfo.Id)
	if err != nil {
		logx.Error(err)
		return resp.SetStatusWithMessage(basic.CodeServiceErr, "failed to get order details")
	}
	if len(orderDetailList) == 0 {
		return resp.SetStatusWithMessage(basic.CodeServiceErr, "order details is empty")
	}
	orderDetailTemplateIds := make([]int64, 0, len(orderDetailList))
	productIds := make([]int64, 0, len(orderDetailList))
	for _, v := range orderDetailList {
		orderDetailTemplateIds = append(orderDetailTemplateIds, *v.OrderDetailTemplateId)
		productIds = append(productIds, *v.ProductId)
	}
	//获取订单详情对应模板信息
	orderDetailTemplateModel := gmodel.NewFsOrderDetailTemplateModel(l.svcCtx.MysqlConn)
	orderDetailTemplateList, err := orderDetailTemplateModel.GetListByIds(l.ctx, orderDetailTemplateIds)
	if err != nil {
		logx.Error(err)
		return resp.SetStatusWithMessage(basic.CodeServiceErr, "failed to get order details templates")
	}
	sizeIds := make([]int64, 0, len(orderDetailTemplateList))
	mapDetailTemplate := make(map[int64]int)
	for k, v := range orderDetailTemplateList {
		sizeIds = append(sizeIds, *v.SizeId)
		mapDetailTemplate[v.Id] = k
	}
	//获取尺寸信息
	productSizeModel := gmodel.NewFsProductSizeModel(l.svcCtx.MysqlConn)
	productSizeList, err := productSizeModel.GetAllByIds(l.ctx, sizeIds, "")
	if err != nil {
		logx.Error(err)
		return resp.SetStatusWithMessage(basic.CodeServiceErr, "failed to get product size list")
	}
	mapProductSize := make(map[int64]int)
	for k, v := range productSizeList {
		mapProductSize[v.Id] = k
	}
	//获取产品信息
	productModel := gmodel.NewFsProductModel(l.svcCtx.MysqlConn)
	productList, err := productModel.GetProductListByIds(l.ctx, productIds, "")
	if err != nil {
		logx.Error(err)
		return resp.SetStatusWithMessage(basic.CodeServiceErr, "failed to get order products")
	}
	mapProduct := make(map[int64]int)
	for k, v := range productList {
		mapProduct[v.Id] = k
	}
	//获取用户地址信息
	addressModel := gmodel.NewFsAddressModel(l.svcCtx.MysqlConn)
	addressList, err := addressModel.GetUserAllAddress(l.ctx, userinfo.UserId)
	if err != nil {
		logx.Error(err)
		return resp.SetStatusWithMessage(basic.CodeServiceErr, "failed to get address")
	}
	//处理订单数据
	addressItems := make([]types.CartAddr, 0, len(addressList))
	for _, v := range addressList {
		addressItems = append(addressItems, types.CartAddr{
			Id:        v.Id,
			Name:      *v.Name,
			FirstName: *v.FirstName,
			LastName:  *v.LastName,
			Mobile:    *v.Mobile,
			Street:    *v.Street,
			Suite:     *v.Suite,
			City:      *v.City,
			State:     *v.State,
			ZipCode:   *v.ZipCode,
			IsDefault: *v.IsDefault,
		})
	}
	items := make([]types.CartDetailItem, 0, len(orderDetailList))
	totalAmount := int64(0) //订单总金额
	for _, v := range orderDetailList {
		thisTotal := (*v.BuyNum) * (*v.Amount)
		size := ""
		if detailTemplateIndex, ok := mapDetailTemplate[*v.OrderDetailTemplateId]; ok {
			detailTemplate := orderDetailTemplateList[detailTemplateIndex]
			if sizeIndex, ok := mapProductSize[*detailTemplate.SizeId]; ok {
				size = *productSizeList[sizeIndex].Capacity
			}
		}
		name := ""
		if productIndex, ok := mapProduct[*v.ProductId]; ok {
			name = *productList[productIndex].Title
		}
		items = append(items, types.CartDetailItem{
			Cover:  *v.Cover,
			Pcs:    *v.BuyNum,
			Amount: fmt.Sprintf("$ %.2f", float64(thisTotal)/100),
			Option: *v.OptionalTitle,
			Size:   size,
			Name:   name,
		})
		totalAmount += thisTotal
	}
	//首付50%
	total := totalAmount / 2
	//尾款
	remaining := totalAmount - total
	payStep := int64(0) //未支付
	if *orderInfo.PayedAmount == *orderInfo.TotalAmount/2 {
		payStep = 1 //已支付首款
	}
	if *orderInfo.PayedAmount == *orderInfo.TotalAmount {
		payStep = 2 //已支付尾款
	}
	payTime := ""
	if *orderInfo.Ptime != 0 {
		payTime = time.Unix(*orderInfo.Ptime, 0).Format("2006-01-02 15:04:05")
	}
	return resp.SetStatusWithMessage(basic.CodeOK, "success", types.CartOrderDetailRsp{
		DeliveryMethod: 1,
		AddressId:      0,
		PayTime:        payTime,
		PayMethod:      1,
		PayStep:        payStep,
		Subtotal:       fmt.Sprintf("$%.2f", float64(totalAmount)/100),
		Total:          fmt.Sprintf("$%.2f", float64(total)/100),
		Remaining:      fmt.Sprintf("$%.2f", float64(remaining)/100),
		AddrList:       addressItems,
		Items:          items,
	})
}