export function getProxyUrl(reqUrl) {
    const usingSsl = reqUrl.protocol === 'https:';
    if (checkBypass(reqUrl)) {
        return undefined;
    }
    const proxyVar = (() => {
        if (usingSsl) {
            return process.env['https_proxy'] || process.env['HTTPS_PROXY'];
        }
        else {
            return process.env['http_proxy'] || process.env['HTTP_PROXY'];
        }
    })();
    if (proxyVar) {
        try {
            return new DecodedURL(proxyVar);
        }
        catch (_a) {
            if (!proxyVar.startsWith('http://') && !proxyVar.startsWith('https://'))
                return new DecodedURL(`http://${proxyVar}`);
        }
    }
    else {
        return undefined;
    }
}
export function checkBypass(reqUrl) {
    if (!reqUrl.hostname) {
        return false;
    }
    const reqHost = reqUrl.hostname;
    if (isLoopbackAddress(reqHost)) {
        return true;
    }
    const noProxy = process.env['no_proxy'] || process.env['NO_PROXY'] || '';
    if (!noProxy) {
        return false;
    }
    // Determine the request port
    let reqPort;
    if (reqUrl.port) {
        reqPort = Number(reqUrl.port);
    }
    else if (reqUrl.protocol === 'http:') {
        reqPort = 80;
    }
    else if (reqUrl.protocol === 'https:') {
        reqPort = 443;
    }
    // Format the request hostname and hostname with port
    const upperReqHosts = [reqUrl.hostname.toUpperCase()];
    if (typeof reqPort === 'number') {
        upperReqHosts.push(`${upperReqHosts[0]}:${reqPort}`);
    }
    // Compare request host against noproxy
    for (const upperNoProxyItem of noProxy
        .split(',')
        .map(x => x.trim().toUpperCase())
        .filter(x => x)) {
        if (upperNoProxyItem === '*' ||
            upperReqHosts.some(x => x === upperNoProxyItem ||
                x.endsWith(`.${upperNoProxyItem}`) ||
                (upperNoProxyItem.startsWith('.') &&
                    x.endsWith(`${upperNoProxyItem}`)))) {
            return true;
        }
    }
    return false;
}
function isLoopbackAddress(host) {
    const hostLower = host.toLowerCase();
    return (hostLower === 'localhost' ||
        hostLower.startsWith('127.') ||
        hostLower.startsWith('[::1]') ||
        hostLower.startsWith('[0:0:0:0:0:0:0:1]'));
}
class DecodedURL extends URL {
    constructor(url, base) {
        super(url, base);
        this._decodedUsername = decodeURIComponent(super.username);
        this._decodedPassword = decodeURIComponent(super.password);
    }
    get username() {
        return this._decodedUsername;
    }
    get password() {
        return this._decodedPassword;
    }
}
//# sourceMappingURL=proxy.js.map