/**
 * 议题模型。
 */
"use strict";

let RedisClient = require('../../repository/redis/redis.client.js');
let redisClient = RedisClient.redisClient();
let redis = redisClient.connection;
let RedisModel = require('./../redis.model.js');
let modelUtil = require('../../util/model.util');
let Participants = require("./participants");
let Sessions = require("./sessions");
let log = require('../../util/log.js');
let TopicsRepo = require('../../repository/mysql/topics.repo');
let configFile = require('../../include/commons').CONFIG_FILE;
let config = require('../../resources/config/' + configFile);
const RedisKey = require('../../include/commons').REDIS_KEYS;
const UserStatus = require('../../include/commons').SESSION_USER_STATUS;


class Topics extends RedisModel {
    constructor() {
        super();
    }

    /**
     * 根据topicId获取对应的消息
     * @param topicId
     */
    getTopicMessages(topicId,page,pagesize) {
        let self = this;
        let topic_key = super.makeRedisKey(RedisKey.Topic, topicId);
        let _super = super.makeRedisKey;
        redis.hgetallAsync(topic_key).then(function (topic) {
            let message_time_key = _super(RedisKey.MessagesByTimestamp, topic.session_id);
            let message_key = _super(RedisKey.Messages, topic.session_id);
            //倒序取出所有的消息ID

            let create_time =topic.create_time;
            let end_time =topic.end_time;
            if(!end_time){
                end_time = new Date().getTime();
            }
            redis.zrevrangebyscoreAsync(message_time_key,end_time,create_time).then(function (messages) {
                //取出消息实例
                redis.hmgetAsync(message_key,messages).then(function(res){
                    modelUtil.emitData(self.eventEmitter,res);
                })
            })
        })
    }
    /**
     *
     * @param topicName 发起议题的名称
     * @param patient 发起议题的患者
     * @param doctor 参与的医生
     * @param messages 发送的消息对象{description:"",title:"",img:"",patient:"",patientName:""}图片多个用逗号隔开
     */
    createTopics(topicName,topicId,patient,healthDoctor,doctor,messages){
        let self = this;
        //MUC模式中sessionID就是患者ID
        let topics_key  = super.makeRedisKey(RedisKey.Topics,patient);
        let topic_key  = super.makeRedisKey(RedisKey.Topic,topicId);
        let sessions = new Sessions();
        let participants  = new Participants();
        //从数据库中获取sessionId
        let date = new Date();
        redis.zaddAsync(topics_key, date.getTime(), topicId).then(function(res){
            redis.hmsetAsync(topic_key,"name",topicName,"end_by","","session_id",patient,"create_time",date.getTime(),"end_time","","description",messages.description).then(function(res){
                sessions.getSessions(patient,function(err,res){
                    //已经存在对应的会话更新全科为旁听
                    if(res&&res.length>0){
                        participants.updateUser(patient,doctor,UserStatus.OTHER);
                        callbegin();
                    }else{//不存在创建SESSION
                        var users={};
                        users[patient]=UserStatus.ONLINE;
                        users[healthDoctor]=UserStatus.ONLINE;
                        users[doctor]=UserStatus.OTHER;
                        sessions.createSession(patient,messages.patientName,config.sessionConfig.MUC,JSON.stringify(users),function(res){
                            if(res){
                                callbegin();
                            }
                        });
                    }
                })
            })
        })
        /**
         * 开始消息发送
         */
        function callbegin(){
            let msg ={};
            msg.senderId = messages.patient;
            msg.senderName = messages.patientName;
            msg.contentType = 6;
            msg.content ="开始咨询"
            msg.timestamp=date;
            sessions.saveMessageByTopic(msg,patient,function(err,msgId){
                if(err){
                    modelUtil.emitData(self.eventEmitter,err);
                }else{
                    self.saveTopicsToSql(topicName,topicId,patient,msgId,date);
                    callBeginMsg();
                }
            })
        }

        /**
         * 发送求助内容
         */
        function callBeginMsg(){
            let msg ={};
            msg.senderId = messages.patient;
            msg.senderName = messages.patientName;
            msg.contentType = 1;
            msg.content =messages.description;
            msg.timestamp = new Date();
            sessions.saveMessageByTopic(msg,patient,function(err,msgId){
                log.info("begin send"+messages.description);
            })
            if(messages.img){
                let imgs = messages.img.split(",");
                for(var j in imgs){
                    let msgimg ={};
                    msgimg.senderId = messages.patient;
                    msgimg.senderName = messages.patientName;
                    msgimg.contentType =2;
                    msgimg.content =imgs[j];
                    msgimg.timestamp = new Date();
                    sessions.saveMessageByTopic(msgimg,patient,function(err,msgId){
                        log.info("begin send"+imgs[j]);
                    })
                }
            }
            modelUtil.emitData(self.eventEmitter,"创建成功！");
        }
    }

    saveTopicsToSql(topicName,topicId,sessionId,messageId,date){
        TopicsRepo.saveTopic(topicName,topicId,sessionId,messageId,date);
    }

    /**
     * 结束议题
     * @param topicId
     * @param endUser
     */
    endTopic(topicId,endUser,endUserName){
        let endDate = new Date();
        let self = this;
        let topic_key  = super.makeRedisKey(RedisKey.Topic,topicId);
        redis.hmsetAsync(topic_key,"end_time",endDate.getTime(),"end_by",endUser).then(function (res) {
            redis.hgetallAsync(topic_key).then(function(topic){
                callEnd(topic.session_id);
            })
        })

        /**
         * 结束消息发送
         */
        function callEnd(sessionId){
            let msg ={};
            msg.senderId = endUser;
            msg.senderName = endUserName;
            msg.contentType = 7;
            msg.content =endUserName+"结束了咨询"
            msg.timestamp = new Date();
            let sessions = new Sessions();
            sessions.saveMessageByTopic(msg,sessionId,function(err,msgId){
                if(err){
                    modelUtil.emitData(self.eventEmitter,err);
                }else{
                    modelUtil.emitData(self.eventEmitter,"结束成功！");
                    TopicsRepo.endTopic(topicId,endUser,msg.date,msgId);
                }
            })
        }
    }

}

// Expose class
module.exports = Topics;