/**
 * yohobuy app
 * @author: xuqi<qi.xu@yoho.cn>
 * @date: 2016/4/25
 */
'use strict';

const config = require('./config/common');

global.Promise = require('bluebird');

const yohoLib = require('yoho-node-lib');

const express = require('express');
const path = require('path');
const bodyParser = require('body-parser');
const cookieParser = require('cookie-parser');
const favicon = require('serve-favicon');
const uuid = require('uuid');

const pkg = require('./package.json');
const session = require('cookie-session');

const app = express();

// 向模板注入变量
app.locals.devEnv = app.get('env') === 'development';
app.locals.version = pkg.version;

// 访问域名层级
app.set('subdomain offset', 3);

// 全局注册library
yohoLib.global(config);

// 指定libray目录
global.utils = path.resolve('./utils');

const logger = global.yoho.logger;

// 访问域名层级
app.set('subdomain offset', 3);
app.use(global.yoho.hbs({
    extname: '.hbs',
    defaultLayout: 'layout',
    layoutsDir: path.join(__dirname, 'doraemon/views'),
    partialsDir: path.join(__dirname, 'doraemon/views/partial'),
    views: path.join(__dirname, 'doraemon/views'),
    helpers: global.yoho.helpers
}));

app.use(global.yoho.middleware());

app.use(favicon(path.join(__dirname, '/public/favicon.ico')));
app.use(express.static(path.join(__dirname, 'public')));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({
    extended: false
}));
app.use(cookieParser());

app.use(session({
    name: 'yohobuy_session',
    secret: '82dd7e724f2c6870472c89dfa43cf48d'
}));

app.use((req, res, next) => {
    req.user = {}; // 全局的用户数据
    req.yoho = {}; // req和res绑定yoho对象，用于传递全局数据, 如req.yoho.channel等

    if (!req.session.id) {
        req.session.id = uuid.v4();
    }

    req.sessionID = req.session.id;

    next();
});

// dispatcher
try {
    const user = require('./doraemon/middleware/user');
    const subDomain = require('./doraemon/middleware/sub-domain');
    const itemNameHandler = require('./doraemon/middleware/item-name-handler');
    const setYohoData = require('./doraemon/middleware/set-yoho-data');
    const errorHanlder = require('./doraemon/middleware/error-handler');
    const setPageInfo = require('./doraemon/middleware/set-pageinfo');
    const devtools = require('./doraemon/middleware/devtools');
    const seo = require('./doraemon/middleware/seo');

    // YOHO 前置中间件
    app.use(subDomain());
    app.use(itemNameHandler);
    app.use(setYohoData());
    app.use(user());
    app.use(seo());
    app.use(setPageInfo());

    if (app.locals.devEnv) {
        app.use(devtools());
    }

    // set no cache
    app.use((req, res, next) => {
        if (req.get('X-Requested-With') === 'XMLHttpRequest') {
            res.set('Cache-Control', 'no-cache');
        }
        next();
    });

    require('./dispatch')(app);

    app.all('*', errorHanlder.notFound()); // 404

    // YOHO 后置中间件
    app.use(errorHanlder.serverError());
} catch (err) {
    logger.error(err);
}

// listener
app.listen(config.port, function() {
    logger.info('yohobuy start');
});