package logic

import (
	"context"
	"encoding/json"
	"errors"
	"fmt"
	"fusenapi/constants"
	"fusenapi/model"
	"fusenapi/product/internal/svc"
	"fusenapi/product/internal/types"
	"fusenapi/utils/auth"
	"fusenapi/utils/format"
	"fusenapi/utils/image"
	"github.com/zeromicro/go-zero/core/logx"
	"github.com/zeromicro/go-zero/core/stores/sqlc"
	"sort"
	"strings"
)

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

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

// 获取产品列表
func (l *GetProductListLogic) GetProductList(req *types.GetProductListReq, loginInfo auth.UserInfo) (resp *types.Response) {
	resp = &types.Response{}
	//校验前台登录情况
	if loginInfo.UserId == 0 {
		resp.Set(constants.CODE_UNAUTH, "please sign in")
		return
	}
	//如果是demo
	if req.IsDemo == 1 {
		var demo types.GetProductListRsp
		if err := json.Unmarshal([]byte(constants.PRODUCT_LIST_DEMO), &demo); err != nil {
			logx.Error(err)
			resp.Set(constants.CODE_SERVICE_ERR, "demo data format err")
		}
		resp.SetWithData(constants.CODE_OK, "success", demo)
		return
	}
	if req.Page <= 0 {
		req.Page = 1
	}
	//获取合适尺寸
	if req.Size > 0 {
		req.Size = image.GetCurrentSize(req.Size)
	}
	//查询用户信息
	userModel := model.NewFsUserModel(l.svcCtx.MysqlConn)
	userInfo, err := userModel.FindOne(l.ctx, loginInfo.UserId)
	if err != nil && !errors.Is(err, sqlc.ErrNotFound) {
		logx.Error(err)
		resp.Set(constants.CODE_SERVICE_ERR, "get user info err")
		return
	}
	if userInfo == nil {
		resp.Set(constants.CODE_UNAUTH, "user not exists")
		return
	}
	//查询符合的产品列表
	productModel := model.NewFsProductModel(l.svcCtx.MysqlConn)
	productList, err := productModel.GetProductListByConditions(l.ctx, int(req.Cid), "sort-desc")
	if err != nil {
		logx.Error(err)
		resp.Set(constants.CODE_SERVICE_ERR, "failed to get product list")
		return
	}
	productLen := len(productList)
	if productLen == 0 {
		resp.Set(constants.CODE_OK, "success")
		return
	}
	//提取产品ids
	productIds := make([]string, 0, productLen)
	for _, v := range productList {
		productIds = append(productIds, fmt.Sprintf("%d", v.Id))
	}
	productPriceModel := model.NewFsProductPriceModel(l.svcCtx.MysqlConn)
	productPriceList, err := productPriceModel.GetPriceList(l.ctx, productIds)
	if err != nil {
		logx.Error(err)
		resp.Set(constants.CODE_SERVICE_ERR, "failed to get product min price list")
		return
	}
	//存储产品最小价格
	mapProductMinPrice := make(map[int64]int64)
	for _, v := range productPriceList {
		priceStrSlic := strings.Split(v.Price, ",")
		priceSlice, err := format.StrSlicToIntSlice(priceStrSlic)
		if err != nil {
			logx.Error(err)
			resp.Set(constants.CODE_SERVICE_ERR, err.Error())
			return
		}
		if len(priceSlice) == 0 {
			continue
		}
		sort.Ints(priceSlice)
		mapProductMinPrice[v.ProductId] = int64(priceSlice[0])
	}
	//获取模板
	productTemplateModel := model.NewFsProductTemplateV2Model(l.svcCtx.MysqlConn)
	productTemplatesV2, err := productTemplateModel.FindAllByCondition(l.ctx, productIds)
	if err != nil {
		logx.Error(err)
		resp.Set(constants.CODE_SERVICE_ERR, "get product template_v2 err")
		return
	}
	mapProductTemplate := make(map[int64]struct{})
	for _, v := range productTemplatesV2 {
		mapProductTemplate[v.ProductId] = struct{}{}
	}
	//获取分类
	tagsModel := model.NewFsTagsModel(l.svcCtx.MysqlConn)
	tagInfo, err := tagsModel.FindOne(l.ctx, req.Cid)
	if err != nil && !errors.Is(err, sqlc.ErrNotFound) {
		logx.Error(err)
		resp.Set(constants.CODE_SERVICE_ERR, "get tag err")
		return
	}
	if tagInfo == nil {
		return &types.Response{Code: 510, Message: "classification not exists "}
	}
	//获取产品尺寸数量
	productSizeModel := model.NewFsProductSizeModel(l.svcCtx.MysqlConn)
	productSizeCount, err := productSizeModel.CountByStatus(l.ctx, 1)
	if err != nil {
		logx.Error(err)
		resp.Set(constants.CODE_SERVICE_ERR, "get product size count err")
		return
	}
	//拼接返回
	itemList := make([]types.Items, 0, productLen)
	for _, v := range productList {
		minPrice, ok := mapProductMinPrice[v.Id]
		_, tmpOk := mapProductTemplate[v.Id]
		//无最小价格则不显示 || 没有模板也不显示
		if !ok || !tmpOk {
			continue
		}
		item := types.Items{
			Id:        v.Id,
			Sn:        v.Sn,
			Title:     v.Title,
			Intro:     v.Intro.String,
			IsEnv:     v.IsProtection,
			IsMicro:   v.IsMicrowave,
			SizeNum:   uint32(productSizeCount),
			MiniPrice: format.CentoDollar(minPrice),
		}
		//千人千面处理
		thousandFaceImageFormatReq := image.ThousandFaceImageFormatReq{
			Size:           int(req.Size),
			IsThousandFace: int(userInfo.IsThousandFace),
			Cover:          v.Cover,
			CoverImg:       v.CoverImg,
			CoverDefault:   v.CoverImg,
			ProductId:      v.Id,
			UserInfo:       *userInfo,
		}
		image.ThousandFaceImageFormat(&thousandFaceImageFormatReq)
		item.Cover = thousandFaceImageFormatReq.Cover
		item.CoverImg = thousandFaceImageFormatReq.CoverImg
		item.CoverDefault = thousandFaceImageFormatReq.CoverDefault
		itemList = append(itemList, item)
	}
	resp.SetWithData(constants.CODE_OK, "success", types.GetProductListRsp{
		Ob: types.Ob{
			Items: itemList,
		}, TypeName: tagInfo.Title, Description: tagInfo.Description,
	})
	return
}