/* ----------------------------------------------------------------------------    

 Question Server
 GitLab: <https://gitlab.com/YourFriendlyNeighborhoodDealer/question-node-server>

 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation, either version 3 of the License, or
 (at your option) any later version.

 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.

 You should have received a copy of the GNU General Public License
 along with this program. If not, see <https://www.gnu.org/licenses/>.

 ------------------------------------------------------------------------- */

const startHTTPS = true;
const siteUrl = "https://qmining.tk"; // http(s)//asd.basd
const ircURL = "https://kiwiirc.com/nextclient/irc.sub.fm/#qmining";

const express = require('express');
const bodyParser = require('body-parser');
const busboy = require('connect-busboy');
const fs = require('fs');
const app = express();
const http = require('http');
const https = require('https');

const logger = require('./logger.js');
const utils = require('./utils.js');
const actions = require('./actions.js');
const stat = require('./stat.js');

const recivedFiles = "public/recivedfiles";
const uloadFiles = "public/f";
const staticFile = "public/data/static";
const dataFile = "public/data.json";
const manFile = "public/man.html";
const simpOutFile = "public/simplified";
const inputFile = "stats/inputs";
const msgFile = "stats/msgs";
const logFile = "stats/logs";
const allLogFile = "/nlogs/log";

// https://certbot.eff.org/
const privkeyFile = "/etc/letsencrypt/live/qmining.tk/privkey.pem";
const fullchainFile = "/etc/letsencrypt/live/qmining.tk/fullchain.pem";
const chainFile = "/etc/letsencrypt/live/qmining.tk/chain.pem";

var certsLoaded = false;
if (startHTTPS && utils.FileExists(privkeyFile) && utils.FileExists(fullchainFile) && utils.FileExists(
		chainFile)) {
	try {
		const key = fs.readFileSync(privkeyFile, "utf8");
		const cert = fs.readFileSync(fullchainFile, "utf8");
		const ca = fs.readFileSync(chainFile, "utf8");
		var certs = {
			key: key,
			cert: cert,
			ca: ca
		};
		certsLoaded = true;

	} catch (e) {
		logger.Log("Error loading cert files!", logger.GetColor("redbg"));
	}
}

const port = 8080;
const httpsPort = 8443;

app.set('view engine', 'ejs');
app.use(function(req, res, next) {
	res.on('finish', function() {
		logger.LogReq(req, true, res.statusCode);
		if (res.statusCode != 404)
			stat.LogStat(req.url);
	});
	next();
});
app.use(express.static('public'));
app.use(busboy({
	limits: {
		fileSize: 10 * 1024 * 1024
	}
}));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({
	limit: '5mb',
	extended: true
}));
app.use(bodyParser.json({
	limit: '5mb'
}));

app.get('/', function(req, res) {
	res.render('main', {
		siteurl: siteUrl,
		qa: actions.ProcessQA()
	});
	res.end();
});

app.get('/sio', function(req, res) {
	res.render('uload');
	res.end();
});

app.get('/manual', function(req, res) {
	res.render('man');
	res.end();
	logger.LogReq(req);
});

app.get('/public', function(req, res) {
	var response = '@Plz update :)';
	response += utils.ReadFile(staticFile);
	res.write(response);
	res.end();
});

app.get('/static', function(req, res) {
	var response = '@Plz update :)';
	response += utils.ReadFile(staticFile);
	res.write(response);
	res.end();
});

app.get('/legacy', function(req, res) {

	var f = utils.ReadFile(dataFile);
	var d = actions.LoadJSON(f);
	let qcount = 0;
	for (let i = 0; i < d.length; i++)
		qcount += d.Subjects[i].length;
	let scount = d.length;

	res.render('alldata', {
		data: d,
		scount: scount,
		qcount: qcount,
		siteurl: siteUrl
	});

	logger.LogReq(req);
});

app.post('/postfeedback', function(req, res) {
	res.redirect('back');
	logger.Log("New feedback message", logger.GetColor("bluebg"), true);
	utils.AppendToFile("\n\n" + logger.GetDateString() + ": " + req.body.message_field, msgFile);
});

app.get('/postfeedback', function(req, res) {
	// TODO: res.redirect("/"); or if needs this anyways, becouse /postfeedback post handler already
	// redirects
	res.render('main', {
		sdata: utils.ReadFile(staticFile)
	});
});

app.post('/isAdding', function(req, res) {
	res.end('OK');
	logger.LogReq(req);
	actions.ProcessIncomingRequest(req.body.datatoadd);
	utils.WriteBackup();
});

app.get('/lred', function(req, res) {
	res.redirect("/legacy");
	res.end();
	logger.LogReq(req);
});

app.get('/menuClick', function(req, res) {
	res.redirect("/");
	res.end();
	logger.LogReq(req);
});

app.get('/irc', function(req, res) {
	res.redirect(ircURL);
	res.end();
	logger.LogReq(req);
});

// all questions readable
app.get('/allqr', function(req, res) {
	var f = utils.ReadFile(dataFile);
	var d = actions.LoadJSON(f);

	res.render('allqr', {
		d: d.toString().split('\n')
	});
	logger.LogReq(req);
});

app.get('/greasy', function(req, res) {
	res.redirect("https://greasyfork.org/en/scripts/38999-moodle-elearning-kmooc-test-help");
	res.end();
	logger.LogReq(req);
});

app.get('/scriptgit', function(req, res) {
	res.redirect("https://gitlab.com/YourFriendlyNeighborhoodDealer/moodle-test-userscript");
	res.end();
	logger.LogReq(req);
});

app.get('/servergit', function(req, res) {
	res.redirect("https://gitlab.com/YourFriendlyNeighborhoodDealer/question-node-server");
	res.end();
	logger.LogReq(req);
});

function UploadFile(req, res, path, next) {
	var fstream;
	req.pipe(req.busboy);
	req.busboy.on('file', function(fieldname, file, filename) {
		logger.Log("Uploading: " + filename, logger.GetColor("blue"));

		utils.CreatePath(path, true);
		let d = new Date();
		let fsplit = filename.split('.');
		let fn = d.getHours() + "" + d.getMinutes() + "" + d.getSeconds() + "." + fsplit[fsplit.length -
			1];

		fstream = fs.createWriteStream(path + "/" + fn);
		file.pipe(fstream);
		fstream.on('close', function() {
			logger.Log("Upload Finished of " + path + "/" + fn, logger.GetColor("blue"));
			next(fn);
		});
		fstream.on('error', function(err) {
			console.log(err);
			res.end("something bad happened :s");
		});
	});
}

app.route('/fosuploader').post(function(req, res, next) {
	UploadFile(req, res, uloadFiles, (fn) => {
		res.redirect("/f/" + fn);
	});
});

app.route('/badtestsender').post(function(req, res, next) {
	UploadFile(req, res, recivedFiles, (fn) => {
		res.render("uploaded");
	});
	logger.LogReq(req);
});

app.get('*', function(req, res) {
	res.render('404');
	res.status(404);
	// utils.AppendToFile(logger.GetDateString() + ": " + "404 GET", logFile);
});

app.post('*', function(req, res) {
	res.status(404);
	// utils.AppendToFile(logger.GetDateString() + ": " + "404 POST", logFile);
});

var msg = "";
stat.Load();

const httpServer = http.createServer(app);
httpServer.listen(port);
msg += "Server listening on port " + port + " (http)";

if (startHTTPS && certsLoaded) {
	const httpsServer = https.createServer(certs, app);
	httpsServer.listen(httpsPort);
	msg += ", and " + httpsPort + " (https)...";
} else {
	logger.Log("Cert files does not exists, starting http only!", logger.GetColor("redbg"));
}
logger.Log(msg, logger.GetColor("yellow"));
logger.Log("Node version: " + process.version);