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

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

// use one apm
if (config.useOneapm) {
    require('oneapm');
}

const express = require('express');
const path = require('path');
const bodyParser = require('body-parser');
const cookieParser = require('cookie-parser');
const favicon = require('serve-favicon');
const yohoLib = require('yoho-node-lib');
const session = require('express-session');
const memcached = require('connect-memcached');
const pkg = require('./package.json');
const devtools = require('./doraemon/middleware/devtools');
const _ = require('lodash');

const uuid = require('uuid');
const app = express();
const MemcachedStore = memcached(session);

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

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

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

const logger = global.yoho.logger;

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


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: _.assign(global.yoho.helpers, require('./utils/helpers'))
}));

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: true
}));
app.use(cookieParser());

app.use(session({
    proxy: true,
    resave: false,
    saveUninitialized: true,
    unset: 'destroy',
    secret: '82dd7e724f2c6870472c89dfa43cf48d',
    name: 'yohoblk_session',
    cookie: {
        domain: 'yohoblk.com',
        httpOnly: false
    },
    store: new MemcachedStore({
        hosts: config.memcache.session,
        prefix: 'yohoblk_session:'
    })
}));

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.sessionID) {
        req.sessionID = uuid.v4();
    }
    next();
});

// dispatcher
try {
    const user = require('./doraemon/middleware/user');
    const setYohoData = require('./doraemon/middleware/set-yoho-data');
    const errorHanlder = require('./doraemon/middleware/error-handler');
    const setPageInfo = require('./doraemon/middleware/set-pageinfo');


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

    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');
});