package logic

import (
	"context"
	"errors"
	"fusenapi/model/gmodel"
	"fusenapi/server/product/internal/svc"
	"fusenapi/server/product/internal/types"
	"fusenapi/utils/auth"
	"fusenapi/utils/basic"
	"fusenapi/utils/image"
	"github.com/zeromicro/go-zero/core/logx"
	"gorm.io/gorm"
)

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

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

// 获取推荐的产品列表
func (l *GetSuccessRecommandLogic) GetSuccessRecommand(req *types.GetSuccessRecommandReq, userInfo *auth.UserInfo) (resp *basic.Response) {
	if userInfo.GetIdType() != auth.IDTYPE_User {
		return resp.SetStatusWithMessage(basic.CodeUnAuth, "please sign in first")
	}
	//获取用户信息
	userModel := gmodel.NewFsUserModel(l.svcCtx.MysqlConn)
	user, err := userModel.FindUserById(l.ctx, userInfo.UserId)
	if err != nil && !errors.Is(err, gorm.ErrRecordNotFound) {
		logx.Error(err)
		return resp.SetStatusWithMessage(basic.CodeServiceErr, "failed to get user info")
	}
	if req.Num == 0 || req.Num > 500 {
		req.Num = 8
	}
	if req.Size > 0 {
		req.Size = image.GetCurrentSize(req.Size)
	}
	//随机取8个产品
	productModel := gmodel.NewFsProductModel(l.svcCtx.MysqlConn)
	productList, err := productModel.GetRandomProductList(l.ctx, int(req.Num))
	if err != nil {
		logx.Error(err)
		return resp.SetStatusWithMessage(basic.CodeServiceErr, "failed to get product list")
	}
	//没有推荐产品就返回
	if len(productList) == 0 {
		return resp.SetStatusWithMessage(basic.CodeOK, "success")
	}
	list := make([]types.GetSuccessRecommandRsp, 0, len(productList))
	for _, v := range productList {
		data := types.GetSuccessRecommandRsp{
			Title: *v.Title,
			Sn:    *v.Sn,
			Id:    v.Id,
			SkuId: 0, //???????
		}
		//千人千面处理
		r := image.ThousandFaceImageFormatReq{
			Size:           int(req.Size),
			IsThousandFace: 0,
			Cover:          *v.Cover,
			CoverImg:       *v.CoverImg,
			CoverDefault:   *v.CoverImg,
			ProductId:      v.Id,
			UserId:         user.Id,
		}
		if user.Id > 0 {
			r.IsThousandFace = int(*user.IsThousandFace)
		}
		image.ThousandFaceImageFormat(&r)
		data.Cover = r.Cover
		data.CoverImg = r.CoverImg
		data.CoverDefault = r.CoverDefault
		list = append(list, data)
	}
	return resp.SetStatusWithMessage(basic.CodeOK, "success", list)
}