/**
 * 消息模型。
 */
"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/modelUtil');
var imDb = require('../../repository/mysql/db/im.db');
let log = require('../../util/log.js');
let Sessions = require('../sessions/sessions');
let configFile = require('../../include/commons').CONFIG_FILE;
let config = require('../../resources/config/' + configFile);
const RedisKey = require('../../include/commons').REDIS_KEYS;
const IMTABLE = require('../../include/commons').IM_DB;

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

    /**
     * 根据topicId获取对应的议题的信息列表
     * @param topicId
     */
    getMessagesByTopicId(topicId){

        
    }

    /**
     * 分页
     * 根据topicId获取对应的议题的成员信息
     * @param topicId
     */
    getMessagesByTopicIdForPage(topicId,page,pagesize){


    }


    /**
     * 根据sessionId获取对应的会话的信息列表mysql
     * @param sessionId
     */
    getMessagesBySession(sessionId,handler){
       let session = new  Sessions();
       session.getSessions(sessionId,function(err,res){
            if(err){
                return;
            }else{
                if(res.length==0){
                    log.warn("session is not found!");
                    return;
                }
                let type = res[0].type;
                let db ="";
                if(type==1){
                    db = IMTABLE.MUCMSG;
                }else if(type==2){
                    db = IMTABLE.P2PMSG;
                }else{
                    db = IMTABLE.GROUPMSG;
                }
                let sql = "select * from "+db+" w where w.session_id = ? limit 0,"+config.sessionConfig.maxMessageCount;
                imDb.execQuery({
                    "sql": sessionsql,
                    "args": [sessionId],
                    "handler": function (err, res) {
                        if(err) {
                            log.error("sql:"+sql+"data:sessionId："+sessionId);
                        }else{
                            log.info("getMessagesBySession success by sessionId :"+sessionId);
                        }
                        handler(err,res);
                    }
                })
            }
       })

    }

    /**
     * 分页获取消息MySQL
     * @param sessionId
     * @param page
     * @param pagesize
     */
    getMessageByPage(sessionId,page,pagesize,handler){
        if(page>0){
            page =page*pagesize;
        }
        let session = new  Sessions();
        session.getSessions(sessionId,function(err,res){
            if(err){
                return;
            }else{
                if(res.length==0){
                    log.warn("session is not found!");
                    return;
                }
                let type = res[0].type;
                let db ="";
                if(type==1){
                    db = IMTABLE.MUCMSG;
                }else if(type==2){
                    db = IMTABLE.P2PMSG;
                }else{
                    db = IMTABLE.GROUPMSG;
                }
                let sql = "select * from "+db+" w where w.session_id = ? limit ?,?";
                imDb.execQuery({
                    "sql": sessionsql,
                    "args": [sessionId,page,pagesize],
                    "handler": function (err, res) {
                        if(err) {
                            log.error("sql:"+sql+"data:sessionId："+sessionId);
                        }else{
                            log.info("getMessagesBySession success by sessionId :"+sessionId);
                        }
                        handler(err,res);
                    }
                })
            }
        })
    }



    /**
     * 根据消息ID获取单条消息
     * @param messageId
     */
    getMessagesByid(messageId){

    }

    saveMessageForRedis(message_id,sessionId,message){
        let message_key = super.makeRedisKey(RedisKey.Messages,sessionId);
        let message_timestamp_key = super.makeRedisKey(RedisKey.MessagesTimestamp,sessionId);
        redis.hsetAsync(message_key, message_id, JSON.stringify(message)).then(function (res) {
            log.info("success save redis message by session :"+sessionId);
            //保存message_timestamp_key redis
            return redis.zaddAsync(message_timestamp_key, message.timestamp.getTime(), message_id);
        });
    }


    /**
     * 保存Message 到mysql
     * @param messages 消息对象
     * @type type 会话类型，1表示MUC会话，2表示P2P，3表示群会话，4表示临时讨论组
     */
    saveMessageForMysql(messages,type,messageid,sessionId){
        var sql = "INSERT INTO "+(type==1?IMTABLE.MUCMSG:type==2?IMTABLE.P2PMSG:IMTABLE.GROUPMSG)+" (id, session_id, sender_id, sender_name,content_type, content, timestamp) VALUES (?,?,?,?,?,?,?) ";
        imDb.execQuery({
            "sql": sql,
            "args": [messageid,sessionId,messages.senderId,messages.senderName,messages.contentType,messages.content,messages.timestamp],
            "handler": function (err, res) {
                if(err) {
                    log.error("sql:"+sql+",error:"+err+",data:"+JSON.stringify(messages)+",messageid:"+messageid+",sessionId:"+sessionId);
                }else{
                    log.info("save message to mysql is success by session :"+sessionId);
                }
            }
        });

    }

}

// Expose class
module.exports = Messages;