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, Type int, name string) (error, uint) {
	err, id := dao.CreateSession(userID, Type, name)
	return err, id
}

// 查找用户的会话列表
func FindSessionByUserID(userID, sessionType int) []proto.SessionResponse {
	sessions := dao.FindSessionByUserID(userID, sessionType)
	sessionsMsgCounts := dao.FindSessionMessageCountByUserID(userID)
	sessionsTokens := dao.FindModelTotalTokensBySessionID(userID)
	smap := make(map[int]int)
	st := make(map[int]uint)
	for _, v := range sessionsMsgCounts {
		smap[v.SessionID] = v.Count
	}
	for _, v := range sessionsTokens {
		st[int(v.SessionID)] = v.Token
	}
	var res []proto.SessionResponse
	for _, v := range sessions {
		var session proto.SessionResponse
		session.ID = v.ID
		session.CreatedAt = v.CreatedAt
		session.UpdatedAt = v.UpdatedAt
		session.Name = v.Name
		session.UserID = v.UserID
		session.MsgCount = smap[int(v.ID)]
		session.TokenUsage = st[int(v.ID)]
		res = append(res, session)
	}
	return res
}
func FindSessionByID(id, userID, sessionType 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, context []int) error {
	err := dao.UpdateSessionByID(id, userId, name, context)
	return err
}

// 创建消息服务
func CreateMessage(msgType int, sessionID int, fromID int, toID int, msg string, status int, functionId int) (error, uint) {
	//sessionID, fromID, toID, msgType, status int, msg string
	err, id := dao.CreateMessage(sessionID, fromID, toID, msgType, status, msg, functionId)
	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.FindMessageBySessionIDV2(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, 0)
	return err, mid
}

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

func WSReceiveMessageService(userID, sessionID int, channel string, msg proto.WSMessageReq, model dao.Model, modelParam proto.ModelParam) (error, uint) {
	var resErr error
	var resID uint
	//处理消息
	if model.Type == proto.ModelTypeOllama {
		resErr, resID = ReceiveOllamaSession(userID, sessionID, channel, msg, modelParam, &model)
	} else if model.Type == proto.ModelTypeSpark {
		resErr, resID = ReceiveSparkSession(userID, sessionID, channel, msg, modelParam, &model)
	} else if model.Type == proto.ModelTypeDouBao {
		doubao(modelParam, msg.Msg, channel, sessionID, userID, int(model.ID))
	} else {
		return errors.New("model not exist"), 0
	}
	return resErr, resID
}

func WSReceiveMessageServiceV2(modelParam proto.ModelParam, ctx *proto.IMParamContext) (error, uint) {
	var resErr error
	var resID uint
	//处理消息
	if ctx.ModelType == proto.ModelTypeOllama {
		resErr, resID = ReceiveOllamaSessionV2(modelParam, ctx)
	} else if ctx.ModelType == proto.ModelTypeSpark {
		SparkV2(modelParam, ctx)
	} else if ctx.ModelType == proto.ModelTypeDouBao {
		DouBaoV2(modelParam, ctx)
	} else {
		return errors.New("model not exist"), 0
	}
	return resErr, resID
}

func ReceiveOllamaSession(userID, sessionID int, channel string, msg proto.WSMessageReq, modelParam proto.ModelParam, m *dao.Model) (error, uint) {
	var resErr error
	var resID uint
	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 := SessionContextMap[sessionID]
	if ok {
		log.Println("actx has get will use:", len(actx))
	}
	req := &api.GenerateRequest{
		Model:   modelParam.Model,
		Context: actx,
		Prompt:  prompt,
	}
	ctx := context.Background()
	robotMsg := ""
	var aiMsg proto.AIQueueMessage
	var data proto.WSMessage
	respFunc := func(resp api.GenerateResponse) error {
		aiMsg.Type = proto.ModelTypeOllama
		aiMsg.Msg = resp
		robotMsg += resp.Response
		if resp.Done { //该消息完成
			actx = resp.Context
			if SessionContextMap == nil {
				SessionContextMap = make(map[int][]int)
			}
			SessionContextMap[sessionID] = actx
			log.Println("actx has save:", len(SessionContextMap[sessionID]))
			//创建消息
			err2, msgID := CreateMessage(2, sessionID, 2, userID, robotMsg, 1, 0) //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)
		go CreateAIStreamMsg(userID, int(m.ID), sessionID, resp, modelParam.Model)
		return nil
	}
	err = client.Generate(ctx, req, respFunc)
	if err != nil {
		log.Fatal(err)
	}
	return resErr, resID
}

func ReceiveOllamaSessionV2(modelParam proto.ModelParam, imCtx *proto.IMParamContext) (error, uint) {
	var resErr error
	var resID uint
	var err error
	if client == nil {
		client, err = api.ClientFromEnvironment()
	}
	if err != nil {
		log.Println("get ollama client error:", err)
	}
	prompt := imCtx.Question
	actx, ok := SessionContextMap[int(imCtx.SessionID)]
	if ok {
		log.Println("actx has get will use:", len(actx))
	}
	req := &api.GenerateRequest{
		Model:   modelParam.Model,
		Context: actx,
		Prompt:  prompt,
	}
	ctx := context.Background()
	robotMsg := ""
	var aiMsg proto.AIQueueMessage
	var data proto.WSMessage
	respFunc := func(resp api.GenerateResponse) error {
		aiMsg.Type = proto.ModelTypeOllama
		aiMsg.Msg = resp
		robotMsg += resp.Response
		if resp.Done { //该消息完成
			actx = resp.Context
			if SessionContextMap == nil {
				SessionContextMap = make(map[int][]int)
			}
			SessionContextMap[imCtx.SessionID] = actx
			log.Println("actx has save:", len(SessionContextMap[imCtx.SessionID]))
			//创建消息
			err2, msgID := CreateMessage(proto.UserToModelMsgType, imCtx.SessionID, imCtx.ModelID, imCtx.UserID, robotMsg, 1, imCtx.FunctionID) //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 = int(imCtx.SessionID)
		data.ToID = imCtx.UserID
		aiMsgStr, _ := json.Marshal(data)
		worker.Publish(imCtx.Channel, string(aiMsgStr), time.Second*60)
		go CreateAIStreamMsg(imCtx.UserID, imCtx.ModelID, imCtx.SessionID, resp, modelParam.Model)
		return nil
	}
	err = client.Generate(ctx, req, respFunc)
	if err != nil {
		log.Fatal(err)
	}
	return resErr, resID
}

func ReceiveSparkSession(userID, sessionID int, channel string, msg proto.WSMessageReq, modelParam proto.ModelParam, model *dao.Model) (error, uint) {
	var resErr error
	var resID uint
	Spark(modelParam, msg.Msg, channel, sessionID, userID, int(model.ID))
	return resErr, resID
}

func CheckUserCreatePPTSessionPermission(userID int) error {
	sessionCount := dao.FindUserSessionCount(userID, proto.SessionTypeUserCreatePPT)
	var err error
	user := GetUserByIDWithCache(userID)
	if user.Role == "admin" {
		return nil
	}
	if sessionCount > 3 {
		err = errors.New("create ppt session count exceed limit")
	}
	return err
}