const fs = require("fs");
const http = require("http");
const path = require("path");

const form = fs.readFileSync(path.join(__dirname, "public", "form.html"));

const formidable = require("formidable");

http
  .createServer((req, res) => {
    if (req.method === "GET") {
      get(res);
      return;
    }
    if (req.method === "POST") {
      post(req, res);
      return;
    }
    error(405, res);
  })
  .listen(3000);

function get(res) {
  res.writeHead(200, {
    "Content-Type": "text/html",
  });
  res.end(form);
}

function post(req, res) {
  if (!/multipart\/form-data/.test(req.headers["content-type"])) {
    error(415, res);
    return;
  }

  const form = formidable({
    multiples: true,
    uploadDir: "./uploads",
  });

  form.parse(req, (err, fields, files) => {
    if (err) return err;
    res.writeHead(200, {
      "Content-Type": "application/json",
    });
    res.end(
      JSON.stringify({
        fields,
        files,
      })
    );
  });
}

function error(code, res) {
  res.statusCode = code;
  res.end(http.STATUS_CODES[code]);
}