require('dotenv').config();
const http = require('http');

const { loadAllProxyServers, setTimeToFetch } = require('./proxyHelpers');
const { sortProxyServers, selectBestProxies, cleanProxyServers, convertProxyListToString } = require('./helpers');

let proxyServersObject = {
    'https': [],
    'socks5': []
};

const handleHttpRequest = (req, res) => {
    const proxyType = req.url.replace('/', '');
    if (proxyType === "favicon.ico"){
        res.end();
        return;
    }

    if (proxyType === 'https' || proxyType === 'socks5'){
        const responseToSend = convertProxyListToString(proxyServersObject[proxyType]);
        res.write(responseToSend);
    }else{
        console.log('[WARN](handleHttpRequest) Proxy type is not valid (https/socks5) - got : ', proxyType);
        res.write('');
    }
    res.end();
}

const refreshProxyList = async () => {
    console.log(new Date(), 'Refreshing proxy list--------');
    const fullProxyList = await loadAllProxyServers();
    const httpsProxyList = fullProxyList['https'];
    const socks5ProxyList = fullProxyList['socks5'];

    const updatedHttpsProxyList = await setTimeToFetch(httpsProxyList);
    const updatedSocks5ProxyList = await setTimeToFetch(socks5ProxyList);

    const cleanUpdatedHttpsProxyList = cleanProxyServers(updatedHttpsProxyList);
    const cleanUpdatedSocks5ProxyList = cleanProxyServers(updatedSocks5ProxyList);

    const sortedHttpsProxyList = sortProxyServers(cleanUpdatedHttpsProxyList);
    const sortedSocks5ProxyList = sortProxyServers(cleanUpdatedSocks5ProxyList);

    proxyServersObject = {
        'https': selectBestProxies(sortedHttpsProxyList),
        'socks5': selectBestProxies(sortedSocks5ProxyList)
    }
    console.log(new Date(), 'DONE----------------------', (process.memoryUsage()['rss'] / 1024 * 100) / 100, 'KiB');
}

(async () => {
    await refreshProxyList();
})();
http.createServer(handleHttpRequest).listen(process.env.SERVER_PORT);
setInterval(refreshProxyList, parseInt(process.env.PROXY_LIST_RELOAD_INTERVAL)*60*1000);