const sortProxyServers = (proxyList) => {
    return proxyList.sort((proxyServer1, proxyServer2) => {
        if (proxyServer1 && proxyServer1.timeToFetch && proxyServer2 && proxyServer2.timeToFetch) {
            return proxyServer1.timeToFetch > proxyServer2.timeToFetch ? 1 : -1;
        }
    });
}

const selectBestProxies = (proxyList) => {
    return proxyList;
}

const cleanProxyServers = (proxyList) => {
    return proxyList.filter(proxyServer => proxyServer && proxyServer.timeToFetch);
}

const convertProxyListToString = (proxyList) => {
    if (Array.isArray(proxyList)){
        let result = '';
        proxyList.forEach(proxyServer => {
            result += `${proxyServer.address}\r\n`;
        });
        return result;
    }
    console.log('[ERROR](convertProxyListToString) Proxy list is not an array')
    console.log(proxyList);
    return '';
}

const timeoutPromise = (timeout) => {
    return new Promise((resolve, reject) => {
        setTimeout(() => { reject('Timeout') }, timeout);
    });
}


exports.sortProxyServers = sortProxyServers;
exports.selectBestProxies = selectBestProxies;
exports.cleanProxyServers = cleanProxyServers;
exports.convertProxyListToString = convertProxyListToString;
exports.timeoutPromise = timeoutPromise;