package service

import (
	"StuAcaWorksAI/dao"
	"StuAcaWorksAI/proto"
	"StuAcaWorksAI/worker"
	"context"
	"encoding/json"
	"errors"
	"github.com/ollama/ollama/api"
	"log"
	"time"
)

// 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
}

var client *api.Client
var actxMap map[int][]int

func WSReceiveMessageService(userID, sessionID int, channel string, msg proto.WSMessageReq) (error, uint) {
	var resErr error
	var resID uint
	//处理消息
	if msg.Type == "ollama" {
		var err error
		if client == nil {
			client, err = api.ClientFromEnvironment()
		}
		if err != nil {
			log.Println("get ollama client error:", err)
		}
		prompt := msg.Msg
		actx, ok := actxMap[sessionID]
		if ok {
			log.Println("actx has get will use:", len(actx))
		}
		req := &api.GenerateRequest{
			Model:   "qwen2.5:0.5b",
			Context: actx,
			Prompt:  prompt,
		}
		ctx := context.Background()
		robotMsg := ""
		var aiMsg proto.AIQueueMessage
		var data proto.WSMessage
		respFunc := func(resp api.GenerateResponse) error {
			aiMsg.Type = "ollama"
			aiMsg.Msg = resp
			robotMsg += resp.Response
			if resp.Done { //该消息完成
				actx = resp.Context
				if actxMap == nil {
					actxMap = make(map[int][]int)
				}
				actxMap[sessionID] = actx
				log.Println("actx has save:", len(actxMap[sessionID]))
				//创建消息
				err2, msgID := CreateMessage(2, sessionID, 2, userID, robotMsg, 1) //机器人id为2,消息类型为2,状态为1
				if err2 != nil {
					log.Println("create robot message error:", err2)
				}
				aiMsg.ID = msgID
				resID = msgID
			}
			//发送消息
			data.Msg = aiMsg
			data.SessionID = sessionID
			data.ToID = userID
			aiMsgStr, _ := json.Marshal(data)
			worker.Publish(channel, string(aiMsgStr), time.Second*60)
			return nil
		}
		err = client.Generate(ctx, req, respFunc)
		if err != nil {
			log.Fatal(err)
		}
	}
	return resErr, resID
}