const http = require("http");
const url = require("url");
const path = require("path");
const fs = require("fs");
const port = process.argv[2] || 8033;

const server = http
  .createServer(function (request, response) {
    const uri = url.parse(request.url).pathname;
    let filename = path.join(process.cwd(), uri);

    fs.exists(filename, function (exists) {
      if (!exists) {
        response.writeHead(404, { "Content-Type": "text/plain" });
        console.log("node.js: 404 Not Found");
        response.write("404 Not Found\n");
        response.end();
        return;
      }

      if (fs.statSync(filename).isDirectory()) filename += "/index.html";

      fs.readFile(filename, "binary", function (err, file) {
        if (err) {
          response.writeHead(500, { "Content-Type": "text/plain" });
          response.write(err + "\n");
          response.end();
          return;
        }

        response.writeHead(200);
        response.write(file, "binary");
        response.end();
      });
    });
  })
  .listen(parseInt(port, 10));

console.log(
  "Static file server running at\n  => http://localhost:" + port + "/"
);