/**
 * 用户端点。
 */
"use strict";

let express = require('express');
let router = express.Router();
let http = require('http');

let configFile = require('../include/commons').CONFIG_FILE;
let config = require('../resources/config/' + configFile);
let log = require("../util/log.js");
let objectUtil = require('../util/objectUtil');

let Users = require('../models/user/users');

const APIv1 = require('../include/endpoints').APIv1;
const MODEL_EVENTS = require('../include/commons').MODEL_EVENTS;

/**
 * 登录。用户登录后，更新数据库中的在线状态。
 *
 * 请求URL：
 *  /users/login?user_id=sand&token=0PFWlKmLBN9YzhCfFWVgYA&client_id=H6FYbDejks6VjMmW3uH7V6&platform=0
 *
 * 参数说明：
 *  user_id：用户ID
 *  token：个推的token
 *  client_id：个推的client id
 *  platform：平台类型，0为iOS，1为Android
 */
router.get(APIv1.Users.Login, function (req, res) {
    let userId = req.query.user_id;
    let token = req.query.token;
    let clientId = req.query.client_id;
    let platform = req.query.platform;
    if (userId == null) {
        throw {httpStatus: 406, message: 'Missing field: user_id.'};
    }

    if (token == null) {
        throw {httpStatus: 406, message: 'Missing field: token.'};
    }

    if (clientId == null) {
        throw {httpStatus: 406, message: 'Missing field: client_id.'};
    }

    if (platform == null) {
        throw {httpStatus: 406, message: 'Missing field: platform.'};
    }

    let users = new Users();
    users.on(MODEL_EVENTS.OK, function (message) {
        res.status(200).send(message);
    });

    users.on(MODEL_EVENTS.Error, function (message) {
        res.status(500).send(message);
    });

    users.login(userId, token, clientId, platform);
});

/**
 * 退出。
 *
 * 请求URL：
 *  /users/logout?user_id=sand
 *
 * 参数：
 *  user_id：用户ID
 */
router.get(APIv1.Users.Logout, function (req, res) {
    let userId = req.query.user_id;
    if (userId == null) {
        throw {httpStatus: 406, message: 'Logout Failed. Missing field: user_id.'};
    }

    let userStatus = new Users();

    userStatus.on(MODEL_EVENTS.OK, function (message) {
        res.status(200).send(message);
    });

    userStatus.on(MODEL_EVENTS.Error, function (message) {
        res.status(500).send(message);
    });

    userStatus.logout(userId);
});

/**
 * 更新客户端状态。
 *
 * 请求URL：
 *  /users/:user_id/status
 *
 * POST参数格式:
 *  {status: 1}, app状态，0在后台，1在前台
 */
router.post(APIv1.Users.UserStatus, function (req, res) {
    let userId = req.param('user_id');
    let status = req.body;
    if (!objectUtil.isJsonObject(status)) {
        throw {httpStatus: 406, message: "Problems parsing json."};
    }

    if (userId === null || (status.status != 0 && status.status != 1)) {
        throw {httpStatus: 406, message: 'Validation Failed. Missing fields.'};
    }

    let userStatus = new Users();

    userStatus.on(MODEL_EVENTS.OK, function (message) {
        res.status(200).send(message);
    });

    userStatus.on(MODEL_EVENTS.Error, function (message) {
        res.status(500).send(message);
    });

    userStatus.updateStatus(userId, status.status);
});

module.exports = router;