/*
 * redis发布订阅
 *example:
 * let channel="ryan";
 redis.pubSub.registerHandlers("ryan",msg=> console.log(msg));
 redis.pubSub.subscribe(channel);

 redis.pubSub.publish(channel,"hello from chen");
 */
"use strict";

let configFile = require('../../include/commons').CONFIG_FILE;
let config = require('../../resources/config/' + configFile);

let RedisModel = require('./../redis.model');
let RedisSubClient = require('./redisSubClient');
let RedisPubClient = require('./redisPubClient');
let RedisClient = require('../../repository/redis/redis.client.js');
let redisPubConn = RedisPubClient.redisClient().connection;
let redisSubConn = RedisSubClient.redisClient().connection;
let redis = RedisClient.redisClient().connection;
let Sessions = require('../../models/sessions/sessions');
let WechatClient = require("../client/wechat.client.js");
let WlyySDK = require("../../util/wlyy.sdk");
let AppClient = require("../client/app.client.js");
let Participants = require('../sessions/participants');
let Messages = require('../messages/messages');
const REDIS_KEYS = require('../../include/commons').REDIS_KEYS;
let ObjectUtil = require("../../util/object.util.js");
let logger = require('../../util/log.js');

class PubSub{
    constructor(){
        this.sub=redisSubConn;
        this.handlers=new Map();

        this.subAction=(channle,message)=>{
            let actions= this.handlers.get(channle)||new Set();
            for(let action of actions)
            {
                console.log("接收消息："+message);
                message = JSON.parse(message);
                message.timestamp = new Date(message.timestamp);
                let sessionId = message.session_id;
                let participants = new Participants();
                let sessionKey = RedisModel.makeRedisKey(REDIS_KEYS.Session, sessionId);
                let sessionType =0;
                // 检查会话中是否存在此成员
                participants.existsParticipant(sessionId, message.sender_id, function (err, res) {
                    if (res) {
                        redis.hmgetAsync(sessionKey, ["type", "name"]).then(function (res) {
                            sessionType = res[0];
                            let sessionName = res[1];
                            if (sessionType) {
                                // 消息保存到Redis，并更新会话最后状态、用户最后消息获取时间
                                let sessionKey = RedisModel.makeRedisKey(REDIS_KEYS.Session, sessionId);
                                let messageKey = RedisModel.makeRedisKey(REDIS_KEYS.Messages, sessionId);
                                let messageTimestampKey = RedisModel.makeRedisKey(REDIS_KEYS.MessagesByTimestamp, sessionId);

                                let msgJson = {
                                    id: message.id,
                                    sender_id: message.sender_id,
                                    sender_name: message.sender_name,
                                    timestamp: message.timestamp.getTime(),
                                    content_type: message.content_type,
                                    content: message.content,
                                    business_type:message.business_type||1
                                };

                                redis.multi()
                                    .hset(messageKey, message.id, JSON.stringify(msgJson))               // 保存消息
                                    .zadd(messageTimestampKey, message.timestamp.getTime(), message.id)  // 保存消息时间
                                    .execAsync()
                                    .then(function (res) {
                                        Messages.updateLastContent(sessionKey, sessionType, null, message);
                                        Messages.cleanOutRangeMessage(sessionId); // clean out range messages
                                    })
                                    .catch(function (ex) {
                                        logger.error("Save message to redis failed: ", ex);
                                    });
                                Messages.updateLastContent(sessionKey, sessionType, sessionName, message);
                                var score = message.timestamp.getTime() + 1;
                                let participantsKey = RedisModel.makeRedisKey(REDIS_KEYS.SessionParticipants, sessionId);
                                redis.zaddAsync(participantsKey, score, message.sender_id)
                                    .then(function (res) {
                                        //这个代码需要消息存入缓存后才能执行，否则用户拉取消息列表时可能缺少消息
                                        if(config.pubSubSwitch){//接收订阅消息处理开关，本地运行和测试库单独运行时防止用户接收消息2次
                                            //Sessions.getRedisPushNotification(message);这里不知为什么无法调用这个方法，提示getRedisPushNotification不是方法
                                            if (message.targetType=='patient') {
                                                if(config.environment!='local'){//pc版接收要发给居民的消息不做处理
                                                    WechatClient.sendMessage(message.targetUserId, message.targetUserName, message);
                                                }
                                            } else {
                                                if(message.sessionType=="1"){
                                                    WechatClient.sendReadDoctorByDoctorId(message.targetUserId, message);
                                                }
                                                //告知医生新消息
                                                WechatClient.sendSocketMessageToDoctor(message.targetUserId,message);
                                                if(config.environment!='local'){//pc版不推送个推
                                                    WlyySDK.request(message.targetUserId, '', '', '', '/im/common/message/messages', 'POST', function (err, res) {
                                                        let count = 0;
                                                        res =  JSON.parse(res)
                                                        if (res.status == 200) {
                                                            let data = res.data;
                                                            count = parseInt(JSON.parse(data.imMsgCount).count) + parseInt(data.system.amount) + parseInt(data.healthIndex.amount) + parseInt(data.sign.amount);
                                                        }

                                                        AppClient.sendNotification(message.targetUserId, message,message.sessionType,count);
                                                    });
                                                }
                                                //外网pcim通过socket推送
                                                WechatClient.sendPcImSocket(message.targetUserId,message,message.sessionType);
                                            }
                                        }
                                    })
                                    .catch(function (err) {
                                        logger.error("Update participant last fetch time failed: ", err);
                                    });
                            }
                        }).catch(function (err) {
                            logger.error({message: "Error occurred while save message to session: " + err});
                        })
                    } else {
                        logger.error({message: "当前会话找不到此发送者"});
                    }
                });

                //action(message);
            }
        }
        this.alredyPublishs=[];
        this.subConnected=false;
    }

    publish(channel,message)
    {
        let action=()=>{
            let pub=redisPubConn;
            pub.publish(channel,message);
            console.log("发布消息:channel:"+channel+",message:"+message);
        };
        if(this.subConnected===false)
        {
            this.alredyPublishs.push(action);
        }
        else{
            action();
        }
    }
    registerHandlers(channel,action)
    {
        var actions=this.handlers.get(channel)||new Set();
        actions.add(action);
        this.handlers.set(channel,actions);
    }
    subscribe(channel)
    {
        let self=this;
        this.sub.subscribe(channel,function (err,reply) {
            if(err){
                log.error(err);
            }
            self.subConnected=true;
            for(let publish of self.alredyPublishs){
                publish();
            }
            console.log("订阅成功:"+reply);
        });

        this.sub.on("message", function (channel, message) {
            self.subAction(channel,message);
        });
    }

    tearDown()
    {
        this.sub.quit();
    }
}

// Expose class
module.exports = new PubSub();