package logic

import (
	"errors"
	"fmt"
	"fusenapi/utils/auth"
	"fusenapi/utils/basic"
	"fusenapi/utils/format"
	"fusenapi/utils/step_price"
	"gorm.io/gorm"
	"strings"

	"context"

	"fusenapi/server/product/internal/svc"
	"fusenapi/server/product/internal/types"

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

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

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

func (l *GetPriceByPidLogic) GetPriceByPid(req *types.GetPriceByPidReq, userinfo *auth.UserInfo) (resp *basic.Response) {
	req.Pid = strings.Trim(req.Pid, " ")
	if req.Pid == "" {
		return resp.SetStatusWithMessage(basic.CodeRequestParamsErr, "err param:pid is empty")
	}
	//获取产品信息(只是获取id)
	productInfo, err := l.svcCtx.AllModels.FsProduct.FindOneBySn(l.ctx, req.Pid, "id")
	if err != nil {
		if errors.Is(err, gorm.ErrRecordNotFound) {
			return resp.SetStatusWithMessage(basic.CodeDbRecordNotFoundErr, "the product is not exists")
		}
		logx.Error(err)
		return resp.SetStatusWithMessage(basic.CodeDbSqlErr, "failed to get product info")
	}
	//查询产品价格
	priceList, err := l.svcCtx.AllModels.FsProductPrice.GetPriceListByProductIds(l.ctx, []int64{productInfo.Id})
	if err != nil {
		logx.Error(err)
		return resp.SetStatusWithMessage(basic.CodeDbSqlErr, "failed to get price list")
	}
	if len(priceList) == 0 {
		return resp.SetStatusWithMessage(basic.CodeOK, "success:price list is empty")
	}
	//处理价格信息
	mapRsp := make(map[string]*types.GetPriceByPidRsp)
	for _, price := range priceList {
		stepNumSlice, err := format.StrSlicToIntSlice(strings.Split(*price.StepNum, ","))
		if err != nil {
			return resp.SetStatusWithMessage(basic.CodeServiceErr, fmt.Sprintf("failed to parse step num,price_id=%d", price.Id))
		}
		stepPriceSlice, err := format.StrSlicToIntSlice(strings.Split(*price.StepPrice, ","))
		if err != nil {
			return resp.SetStatusWithMessage(basic.CodeServiceErr, fmt.Sprintf("failed to parse step price,id = %d", price.Id))
		}
		lenStepNum := len(stepNumSlice)
		itemList := make([]types.PriceItem, 0, 10)
		for *price.MinBuyNum < (int64(stepNumSlice[lenStepNum-1]) + 5) {
			itemList = append(itemList, types.PriceItem{
				Num:      *price.MinBuyNum,
				TotalNum: (*price.MinBuyNum) * (*price.EachBoxNum),
				Price:    step_price.GetCentStepPrice(int(*price.MinBuyNum), stepNumSlice, stepPriceSlice),
			})
			*price.MinBuyNum++
		}
		minPrice := float64(stepPriceSlice[len(stepPriceSlice)-1]) / 100
		maxPrice := float64(stepPriceSlice[0]) / 100
		mapKey := l.getSizePriceMapKey(*price.SizeId)
		if _, ok := mapRsp[mapKey]; ok {
			mapRsp[mapKey].Items = append(mapRsp[mapKey].Items, itemList...)
			mapRsp[mapKey].MinPrice = minPrice
			mapRsp[mapKey].MaxPrice = maxPrice
		} else {
			mapRsp[mapKey] = &types.GetPriceByPidRsp{
				Items:    itemList,
				MinPrice: minPrice,
				MaxPrice: maxPrice,
			}
		}
	}
	return resp.SetStatusWithMessage(basic.CodeOK, "success", mapRsp)
}
func (l *GetPriceByPidLogic) getSizePriceMapKey(sizeId int64) string {
	return fmt.Sprintf("_%d", sizeId)
}