package service

import (
	"designs/global"
	"designs/model"
	"designs/utils"
)

func RemainDataBydDay(pf string, gid string, startTime string, endTime string) (map[string]map[string]interface{}, error) {
	//先计算出这个时间内 ，每天的注册用户数量
	var users []model.User

	err := global.App.DB.Table("user").
		Where("pf", pf).Where("gid", gid).
		Where("createdAt", ">=", startTime).
		Where("createdAt", "<=", endTime).
		Scan(&users).Error
	if err != nil {
		return nil, err
	}
	var UsersId []int
	UsersBydDay := utils.GetTimeDayDate(startTime, endTime) //用户分别是在哪天注册的
	UserLoginBydDay := UsersBydDay
	for _, user := range users {
		UsersId = append(UsersId, user.UserId)
		UsersBydDay[user.CreatedAt.Format("2006-01-02")] = append(UsersBydDay[user.CreatedAt.Format("2006-01-02")], user.UserId)
	}
	users = nil //用完后清空内存

	//把每天的注册用户进行集合，查出后面所有天数的活跃情况
	var UserLogin []model.UserLogin
	err = global.App.DB.Table("user_login").
		Where("pf", pf).Where("gid", gid).
		WhereIn("userId", UsersId).
		Where("loginTime", ">=", startTime).
		Select("loginTime", "userId").
		Scan(&UserLogin).Error
	if err != nil {
		return nil, err
	}

	//对这些数据进行整理
	for _, v := range UserLogin {
		//根据天进行分组，得出总共有多少
		times := v.LoginTime.Format("2006-01-02")
		UserLoginBydDay[times] = append(UserLoginBydDay[times], v.UserId)
	}

	res := make(map[string]map[string]interface{})
	//逐天比较注册的数据和留存的数据，得出每天的活跃比例和人数
	for day, v := range UsersBydDay {
		remain := make(map[string]interface{})
		remain["count"] = len(v)
		remain["date"] = day
		//分别比较每一天的数据
		for dayDate, loginDay := range UserLoginBydDay {
			ok, remainDays := utils.CompareDates(dayDate, day)
			if !ok {
				continue
			}
			remain[remainDays] = int(utils.IntersectionRate(v, loginDay) * 100)
		}

		res[day] = remain
	}

	return res, nil
}