/* -----------------------------------------------
 * Authors: QuiteAFancyEmerald, BinBashBanana (OlyB), YÖCTDÖNALD'S
 * Additional help from Divide and SexyDuceDuce
 * MIT license: http://opensource.org/licenses/MIT
 * ----------------------------------------------- */
const
    alloy = require('./src/alloyproxy'),
    path = require('path'),
    config = require('./config.json'),
    fs = require('fs'),
    http = require('http'),
    express = require('express'),
    app = express(),
    port = process.env.PORT || config.port,
    server = http.createServer(app);

btoa = (str) => {
    return new Buffer.from(str).toString('base64');
}

atob = (str) => {
    return new Buffer.from(str, 'base64').toString('utf-8');
}

const text404 = fs.readFileSync(path.normalize(__dirname + '/views/404.html'), 'utf8'),
    siteIndex = 'index.html',
    pages = {
        /* Main */
        'in': 'info.html',
        'faq': 'faq.html',
        'j': 'hidden.html',
        's': 'pages/frame.html',
        'z': 'pages/surf.html',
        'c': 'pages/nav/credits.html',
        'x': 'pages/nav/bookmarklets.html',
        'i': 'pages/nav/icons.html',
        't': 'pages/nav/terms.html',
        /* Games */
        'g': 'pages/nav/gtools.html',
        'h': 'pages/nav/games5.html',
        'el': 'pages/nav/emulators.html',
        'f': 'pages/nav/flash.html',
        'm': 'pages/nav/emulibrary.html',
        /* Proxies */
        'q': 'pages/proxnav/corrosion.html',
        'a': 'pages/proxnav/alloy.html',
        'w': 'pages/proxnav/womginx.html',
        'p': 'pages/proxnav/pmprox.html',
        'e': 'pages/proxnav/pyb.html',
        'o': 'pages/proxnav/pydodge.html',
        'y': 'pages/proxnav/youtube.html',
        'd': 'pages/proxnav/discordhub.html',
        /* Ruffle and Webretro */
        'fg': 'archive/gfiles/flash/index.html',
        'eg': 'archive/gfiles/rarch/index.html'
    },
    fileMod = [
        "/views/assets/css/styles.min.css",
    ],
    cookingInserts = [
        "Random sentence one filled with certain keywords.",
        "Random sentence two filled with certain keywords."
    ],
    splashtext = [
        'Th<wbr>is is si<wbr>mp<wbr>ly a pu<wbr>bl<wbr>ic dem<wbr>o for Ho<wbr>ly Unb<wbr>locke<wbr>r. Certain functions may not work properly. Jo<wbr>in the <a id="tnlink" target="_blank">T<wbr>N Disc<wbr>ord</a> for official site lin<wbr>ks'
    ],
    vegetables = ['Cooking1', 'Cooking2'],
    charRandom = ['&#173;', '&#8203;'];

function randomListItem(lis) {
    return lis[Math.floor(Math.random() * lis.length)];
}

// The inline function returns are necessary to prevent all replaced things from being the same

function insertCharset(str) {
    return str.replace(/&#173;|&#8203;|<wbr>/g, function() { return randomListItem(charRandom); });
}

function insertSplash(str) {
    return str.replace(/&#xFE0F;/g, function() { return splashtext; });
}

function insertCooking(str) {
    return str.replace(/<!-- IMPORTANT-HUCOOKINGINSERT-DONOTDELETE -->/g, function() { return '<span style="display: none;" data-fact="' + randomListItem(vegetables) + '" data-type="' + randomListItem(vegetables) + '">' + randomListItem(cookingInserts) + '</span>'; });
}

function cacheBusting(str) {
    return str.replace(/styles.min.css/g, 'styles-368357.min.css');
}

function insertAll(str) {
    return insertCharset(insertCooking(insertSplash(cacheBusting(str))));
}

/* Cache Busting
const stats = fs.statSync(path.normalize(__dirname + fileMod), 'utf8'), 
	seconds = (new Date().getTime() - stats.mtime);

fs.renameSync(path.normalize(__dirname + fileMod), 'links-' + seconds + '.js');

function cacheBusting(str) {
	return str.replace(/links.js/g, "links" + '-' + seconds + '.js');
}
*/

function tryReadFile(file) {
    return fs.existsSync(file) ? fs.readFileSync(file, 'utf8') : text404;
}

// Local alloy proxy
const localAlloy = new alloy({
    prefix: '/fetch/',
    error: (proxy) => { proxy.res.send(tryReadFile(path.normalize(__dirname + '/views/error.html')).replace('%ERR%', proxy.error.info.message.replace(/<|>/g, ''))); }, // Doing replace functions on "<" and ">" to prevent XSS.
    request: [],
    response: [],
    injection: true
});
app.use(localAlloy.app);
localAlloy.ws(server);

/* Querystring Navigation */
app.get('/', async(req, res) => res.send(insertAll(tryReadFile(path.normalize(__dirname + '/views/' + (['/', '/?'].includes(req.url) ? siteIndex : pages[Object.keys(req.query)[0]]))))));

/* Static Files Served */
app.use(express.static(path.normalize(__dirname + '/views')));
app.use((req, res) => res.status(404, res.send(insertAll(text404))));

server.listen(port);
console.log('Holy Unblocker is listening on port ' + port + '. This is simply a public for Holy Unblocker. Certain functions may not work properly.');