/**
 * 消息库。
 */
"use strict";

let configFile = require('../../include/commons').CONFIG_FILE;
let config = require('../../resources/config/' + configFile);
let log = require('../../util/log.js');
let SessionRepo = require('../../repository/mysql/session.repo');
let ImDb = require('../mysql/db/im.db');

const DB_TABLES = require('../../include/commons').DB_TABLES;

class MessageRepo {
    constructor() {
    }

    /**
     * 分页获取消息
     *
     * @param sessionId
     * @param page
     * @param size
     * @param messageType
     * @param handler
     */
    static findBySessionId(sessionId, page, size, messageType, handler) {
        page = page < 0 ? 0 : page;

        SessionRepo.findOne(sessionId, function (err, res) {
            if (!err) {
                if (res.length == 0) {
                    handler(null, null);
                    return;
                }

                let params = [];
                let type = res[0].type;
                let MessageTable = "";
                if (type == 1) {
                    MessageTable = DB_TABLES.MucMessages;
                } else if (type == 2) {
                    MessageTable = DB_TABLES.P2pMessages;
                } else {
                    MessageTable = DB_TABLES.GroupMessages;
                }

                let where = " w.session_id = ? ";
                params.push(sessionId);
                if (messageType) {
                    where += " and content_type=? ";
                    params.push(messageType);
                }

                let sql = "select id, session_id, sender_id, sender_name, content_type, content, timestamp from " +
                    MessageTable + " w where " + where + " order by w.id limit ?, ?";
                params.push(page);
                params.push(size);
                ImDb.execQuery({
                    "sql": sql,
                    "args": params,
                    "handler": handler || function (err, res) {
                        if(err) log.error(err);
                    }
                });
            }
        });
    }

    /**
     * 保存消息
     *
     * @param message 消息对象
     * @param sessionType 会话类型，参见 SESSIONS_TYPES
     * @param messageId
     * @param sessionId
     * @param handler
     */
    static save(message, sessionType, messageId, sessionId, handler) {
        if(message.agent){
            let sql = "INSERT INTO " + DB_TABLES.sessionTypeToTableName(sessionType) +
                " (id, session_id, sender_id, sender_name,content_type, content, timestamp,business_type,agent) VALUES (?,?,?,?,?,?,?,?,?)";
            ImDb.execQuery({
                "sql": sql,
                "args": [messageId, sessionId, message.sender_id, message.sender_name, message.content_type, message.content, message.timestamp, message.business_type || 1,message.agent],
                "handler": handler || function (err, res) {
                    if(err) log.error(err);
                }
            });
        }else {
            let sql = "INSERT INTO " + DB_TABLES.sessionTypeToTableName(sessionType) +
                " (id, session_id, sender_id, sender_name,content_type, content, timestamp,business_type) VALUES (?,?,?,?,?,?,?,?)";
            ImDb.execQuery({
                "sql": sql,
                "args": [messageId, sessionId, message.sender_id, message.sender_name, message.content_type, message.content, message.timestamp, message.business_type || 1],
                "handler": handler || function (err, res) {
                    if(err) log.error(err);
                }
            });
        }
    }

    /**
     * 获取会话医生的id
     * @param sessionId
     * @param handler
     */
    static findLastMessage(sessionId,sessionType,handler){
        let sql =
            "SELECT s.content_type, s.content,s.agent FROM " + DB_TABLES.sessionTypeToTableName(sessionType) + " s " +
            "WHERE s.session_id = ? order by s.timestamp desc limit 1 ";

        ImDb.execQuery({
            "sql": sql,
            "args": [sessionId],
            "handler": handler
        });
    }

}

module.exports = MessageRepo;