var http = require('http');
const https = require('https');
const zlib = require("zlib");


const TARGET_HOST = 'example.org';

const resetAnsi = "\u001B[0m";
function setColor(r, g, b) {
    return "\x1b[38;2;" + r + ";" + g + ";" + b + "m";
}

//create a server object:
http.createServer(function (req, res) {
    let headers = { ...req.headers, host: TARGET_HOST };
    const options = {
        hostname: TARGET_HOST,
        path: req.url,
        headers,
        method: req.method ?? "POST",
    }


    let request = https.request(options, (response) => {
        const resp_headers = { ...response.headers, };
        res.writeHead(response.statusCode, resp_headers);

        const isGzip = resp_headers["content-encoding"] === "gzip";

        let body_response = [];
        const gunzip = zlib.createGunzip();

        function finish() {
            body = Buffer.concat(body).toString();
            body_response = Buffer.concat(body_response).toString();
            console.log(
                `${setColor(255, 255, 255)}Request on (${req.method}): ${req.url}
- ${setColor(100, 0, 0)}headers: ${Object.entries(headers).map(([a, b]) => a + "=" + b).join(", ")}
- ${setColor(200, 0, 0)}request: ${body}
- ${setColor(0, 100, 0)}response headers: ${Object.entries(resp_headers).map(([a, b]) => a + "=" + b).join(", ")}
- ${setColor(0, 200, 0)}recieved: ${body_response}
${resetAnsi}`);
        }

        response.on('data', function (chunk) {
            if (isGzip) gunzip.write(chunk);
            else body_response.push(chunk);
            res.write(chunk);
        });

        gunzip.on('data', function (chunk) {
            body_response.push(chunk);
        });
        gunzip.on("end", finish);

        response.on('end', function () {
            if (isGzip) gunzip.end();
            else {
                finish();
            }
            res.end();
        });

    });


    let body = [];
    req
        .on('error', err => {
            console.error(err);
        })
        .on('data', chunk => {
            request.write(chunk);
            body.push(chunk);
        })
        .on('end', () => {
            request.end();
        });
}).listen(10920);