/**
 * URL初始化。
 *
 * 除了初始化URL，还增加对版本的访问控制。
 *
 * author: Sand
 * since: 12/23/2016
 */
"use strict";

let ObjectUtil = require("../util/object.util.js");

// pages
let index = require('../controllers/index');
let socket = require('../controllers/socket');

// endpoints
let application = require('./v2/application.endpoint');
let users = require('./v2/user.endpoint');
let sessions = require('./v2/session.endpoint');
let topics = require('./v2/topic.endpoint');
let management = require('./v2/management.endpoint');

const PAGES = require('../include/endpoints').PAGES;
const APIv2 = require('../include/endpoints').APIv2;

class UrlInitializer {
    constructor() {
    }

    static initRestApi(app) {
        // 旧版本API过滤
        app.use(function (req, res, next) {
            if (req.url.indexOf('/api/v1') >= 0) {
                res.status(403).send({message: "API v1 is invalid since 2.0.0, please use API v2."});
            } else {
                next();
            }
        });

        // POST, PUT请求必须使用JSON作为BODY
        app.use(function (req, res, next) {
            if(req.method === 'POST' || req.method === 'PUT'){
                if(!ObjectUtil.isJsonObject(req.body)){
                    throw {httpStatus: 406, message: 'Problems parsing JSON.'}
                }
            }

            next();
        });

        app.use(APIv2.Application.Base, application);
        app.use(APIv2.Management.Base, management);
        app.use(APIv2.Users.Base, users);
        app.use(APIv2.Sessions.Base, sessions);
        app.use(APIv2.Sessions.Base, topics);
    }

    static initWebPages(app) {
        app.use(PAGES.Home.Index, index);
        app.use(PAGES.Socket.Index, socket);
    }
}

module.exports = UrlInitializer;