global.BASEDIR = __dirname;

var fs = require('fs');
var FileStreamRotator = require('file-stream-rotator')
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 robots = require('express-robots');
var passport = require('passport');
var flash = require('connect-flash');

var routes = require('./routes/index');
var docs = require('./routes/docs');
// var auth = require('./routes/auth');
var admin = require('./routes/admin');
var api_1_0 = require('./routes/api/routes-1.0');
var userService = require('./routes/user/user');

var config = require('./config.js');
var consts = require('./consts.js');

var app = express();


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

// set proxy settings
if(config.read('backend.proxy'))
	app.set('trust proxy', true);

// logging
if(config.read('backend.logDir')) {
	var logDirectory = config.read('backend.logDir');
	fs.existsSync(logDirectory) || fs.mkdirSync(logDirectory);
	var accessLogStream = FileStreamRotator.getStream({
		filename: logDirectory + '/access-%DATE%.log',
		frequency: 'daily',
		verbose: false
	});
	var errorLogStream = FileStreamRotator.getStream({
		filename: logDirectory + '/access-%DATE%.log',
		frequency: 'daily',
		verbose: false
	});
	app.use(logger(config.read('backend.log') || 'combined', {stream: accessLogStream}));
	// errorLog.setStream(errorLogStream);
}else
	app.use(logger(config.read('backend.log') || 'combined'));

// uncomment after placing your favicon in /public
//app.use(favicon(__dirname + '/public/favicon.ico'));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(robots({UserAgent: '*', Disallow: '/'}));
app.use(express.static(path.join(__dirname, 'public')));
app.use(session({
	secret: 'Open History Mission',
	resave: false,
	saveUninitialized: true
}));
app.use(passport.initialize());
app.use(passport.session());
app.use(flash());

app.use(function(req, res, next) {
	//TODO: restrict to localhost only.
	res.set("Access-Control-Allow-Origin", "*");
	res.set("Access-Control-Allow-Headers", "X-Requested-With");
	res.set("Access-Control-Allow-Credentials", "true");
	res.set("Access-Control-Allow-Methods", "GET,HEAD,OPTIONS,POST,PUT,DELETE");
	res.set("Access-Control-Allow-Headers", "Access-Control-Allow-Headers, Origin,Accept, X-Requested-With, Content-Type, Access-Control-Request-Method, Access-Control-Request-Headers, x-token");
	// if(req.method=='OPTIONS') return res.end();
	next();
});

app.use('/', routes);
app.use('/docs', docs);
app.use('/admin', admin);
app.use('/api/1.0', api_1_0);
app.use('/user', userService);

app.get('/config.json', function(req, res, next){
	res.send(JSON.stringify(config.read('client')));
});

app.locals.client = config.read('client');
app.locals.consts = consts;
app.locals.clientConsts = consts.v;

// 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 handlers

// development error handler
// will print stacktrace
if (app.get('env') === 'development') {
	app.use(function(err, req, res, next) {
		res.status(err.status || 500);
		res.render('error', {
			message: err.message,
			error: err
		});
	});
}

// production error handler
// no stacktraces leaked to user
app.use(function(err, req, res, next) {
	res.status(err.status || 500);
	res.render('error', {
		message: err.message,
		error: {}
	});
});

// process.on('uncaughtException', function (err) {
// 	if(GLOBAL.res) res.status(500).send('unexpected error.');
// 	console.log(err);
// });

module.exports = app;