package service

import (
	"StuAcaWorksAI/dao"
	"errors"
)

// 创建会话服务
func CreateSession(userID int, name string) (error, uint) {
	err, id := dao.CreateSession(userID, name)
	return err, id
}

// 查找用户的会话列表
func FindSessionByUserID(userID int) []dao.Session {
	sessions := dao.FindSessionByUserID(userID)
	return sessions
}
func FindSessionByID(id, userID int) (error, []dao.Session) {
	session := dao.FindSessionByID(id)
	var res []dao.Session
	if session.UserID != userID {
		return errors.New("session not belong to user"), res
	}
	res = append(res, session)
	return nil, res
}

func DeleteSessionByID(id, userID int) error {
	session := dao.FindSessionByID(id)
	if session.UserID != userID {
		return errors.New("session not belong to user")
	}
	err := dao.DeleteSessionByID(id)
	return err
}

// 更新会话名字
func UpdateSessionByID(id int, userId int, name string) error {
	err := dao.UpdateSessionByID(id, userId, name)
	return err
}

// 创建消息服务
func CreateMessage(msgType int, sessionID int, fromID int, toID int, msg string, status int) (error, uint) {
	//sessionID, fromID, toID, msgType, status int, msg string
	err, id := dao.CreateMessage(sessionID, fromID, toID, msgType, status, msg)
	return err, id
}

// 通过会话id查询消息
func FindMessageBySessionID(sessionID, userID int) (error, []dao.Message) {
	//查看会话是否属于该用户
	session := dao.FindSessionByID(sessionID)
	if session.UserID != userID {
		return errors.New("session not belong to user"), nil
	}
	msgs := dao.FindMessageBySessionID(sessionID)
	return nil, msgs
}

func CreateGeneralMessageService(fromID, toID, msgType, sessionID int, msg string) (error, uint) {
	//查看会话是否属于该用户
	session := dao.FindSessionByID(sessionID)
	if session.UserID != fromID {
		return errors.New("session not belong to user"), 0
	}
	err, mid := CreateMessage(msgType, sessionID, fromID, toID, msg, 0)
	return err, mid
}