/**
 * 用户状态模型。此处状态是指用户移动应用App状态，如用户是否已登录，App是否已打开。
 *
 * 用户状态区分患者与医生。**当前**仅是与医生相关，若需要增加患者相关内容，
 * 需要增加在用户判断。
 *
 * author: Sand
 * since: 2016.11.20
 */
"use strict";

let BaseModel = require('./base.model');

let doctorRepo = require('../repository/mysql/doctor.repo');
let modelUtil = require("../util/modelUtil.js");

let Token = require('./auth/token');

class UserStatus extends BaseModel {
    constructor() {
        super();
    }

    /**
     * 登录。
     */
    login(userId, token, clientId, platform) {
        let self = this;
        doctorRepo.deleteToken(token, function (err, result) {
            if (err) {
                modelUtil.emitDbError(self.eventEmitter, 'Error occurs when user login and delete token', err);
            } else {
                doctorRepo.login(userId, token, clientId, platform,
                    function (err, result) {
                        if (err) {
                            modelUtil.emitDbError(self.eventEmitter, 'Error occurs when user login and delete token', err);
                        }

                        let token = new Token(userId, clientId, platform);
                        modelUtil.emitData(self.eventEmitter, {token: token.value});
                    });
            }
        });
    }

    /**
     * 退出。
     */
    logout(userId) {
        let self = this;
        doctorRepo.logout(userId,
            function (err, result) {
                if (err) {
                    modelUtil.emitDbError(self.eventEmitter, 'Logout failed', err);
                    return;
                }

                modelUtil.emitData(self.eventEmitter, {});
            });
    }

    /**
     * 更新用户状态。
     */
    updateStatus(userId, status) {
        let self = this;
        doctorRepo.updateStatus(userId, status,
            function (err, result) {
                if (err) {
                    modelUtil.emitDbError(self.eventEmitter, 'Update user status failed', err);
                    return;
                }

                modelUtil.emitData(self.eventEmitter, {});
            });
    }
}

module.exports = UserStatus;