// builtin
var fs = require('fs');

var express = require('express');
var path = require('path');
var favicon = require('serve-favicon');
var logger = require('morgan');
var cookieParser = require('cookie-parser');
var bodyParser = require('body-parser');
var session = require('express-session');
var settings = require("./common/settings");
var config = require("./common/config");
var _ = require('lodash');

//for handlebars
var hbs = require('hbs');

var loginHandler = require('./handlers/LoginHandler-v2');
var sysHandlers = require('./handlers/SysHandlers');

/* 暂时屏蔽, 以测试hbs相关
var proxyHandler = require('./handlers/ProxyHandler');

var index = require('./routes/index');
var users = require('./routes/users');
var moduleRouter = require('./modules/ModuleRouter');
*/

var index = require('./routes/index-hbs');
var users = require('./routes/users-hbs');
var moduleRouter = require('./modules/ModuleRouter-hbs');
var fileRouter = require('./modules/FileRouter');
var httpTest = require('./routes/HttpTest');

var app = express();

hbs.registerPartial('layout', fs.readFileSync(__dirname + '/modules/include/smartadmin/main.hbs', 'utf8'));
hbs.registerPartials(__dirname + '/modules/include/smartadmin/parts');

// web网站模板相关
//hbs.registerPartial('tpl_reactbt4', fs.readFileSync(__dirname + '/www/t/reactbt4/main.hbs', 'utf8'));
//hbs.registerPartials(__dirname + '/www/t/reactbt4/parts');

// hbs.registerPartial('hbs_mbo5', fs.readFileSync(__dirname + '/www/t/mombo5/main.hbs', 'utf8'));
// hbs.registerPartials(__dirname + '/www/t/mombo5/parts');
//
// hbs.registerPartial('hbs_zhscs', fs.readFileSync(__dirname + '/www/t/zhscs/main.hbs', 'utf8'));
// hbs.registerPartials(__dirname + '/www/t/zhscs/parts');


// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'hbs');
app.engine('.hbs', hbs.__express);
app.engine('.html', hbs.__express);

// uncomment after placing your favicon in /public
//app.use(favicon(path.join(__dirname, 'public', 'favicon.ico')));
app.use(logger('dev'));
app.use(cookieParser());
app.use(session({secret: 'keyboard cat',
    saveUninitialized: false,
    resave: true,
    rolling: true,
    cookie: {maxAge: 18000000} //5个小时
    // cookie: {expires: false } //todo: 2019-06-30 lgh
}));

app.use(express.static(path.join(__dirname, 'modules')));
app.use(express.static(path.join(__dirname, 'public')));
// app.use(express.static(path.join(__dirname, 'upload')));

//设置upload静态路径 (lgh 2021-7-10)
var upload_dir = config.settings.upload_dir || '/opt/upload';
app.use('/upload', express.static(upload_dir));

//web网站相关
// app.use(express.static(path.join(__dirname, 'www/t')));
// app.use(express.static(path.join(__dirname, 'www/sites')));

//rmi代理(代理应该在bodyParser之前)
//app.use(proxyHandler());

app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));

//系统登录处理
app.use(loginHandler());

//环境变量设置
app.use(sysHandlers.envHandler());

//主框架服务调用
//app.use(sysHandlers.menuListHandler());

var globalSettings = settings.global;

app.use(function(req,res,next){
    //解决iframe跨域访问的问题?
    if(!res.getHeader("P3P")){
        res.setHeader("P3P","CP=CAO PSA OUR");
    }

    //将globalSettings带入模板可引用的环境中
    _.merge(res.locals, globalSettings);

    //以下赋值语句，使得req、err在ejs中可以直接访问
    res.locals.req = req;
    res.locals.env = {};
    res.locals.err = '';

    next();
});

app.use('/', index);
app.use("/m", moduleRouter);
app.use("/w", moduleRouter);
app.use('/users', users);
app.use("/file", fileRouter);
app.use("/httpTest", httpTest);

// catch 404 and forward to error handler
app.use(function(req, res, next) {
    var err = new Error('Not Found');
    err.status = 404;
    next(err);
});

// error handler
app.use(function(err, req, res, next) {
    // set locals, only providing error in development
    res.locals.message = err.message;
    res.locals.error = req.app.get('env') === 'development' ? err : {};

    // render the error page
    res.status(err.status || 500);
    res.render('error');
});

module.exports = app;