'use strict';
const form = document.getElementById('login-form');
const button = document.getElementById('nsg-x1-logon-button');
const message = document.getElementById('message');
async function authenticate(path, body) {
  const response = await fetch(path, {
    method: 'POST', body, credentials: 'same-origin', redirect: 'error',
    headers: { Accept: 'application/vnd.citrix.authenticateresponse-1+xml' },
    signal: AbortSignal.timeout(10000)
  });
  if (!response.ok) throw new Error('Request failed');
  const result = rdx.utils.authentication(await response.text());
  form.elements.StateContext.value = result.state;
  // Only the local authentication endpoint can receive form credentials.
  if (result.postback === '/nf/auth/doAuthentication.do') form.action = result.postback;
  return result;
}
const ready = authenticate('/nf/auth/getAuthenticationRequirements.do', new URLSearchParams())
  .catch(() => null);
form.addEventListener('submit', async event => {
  event.preventDefault();
  button.disabled = true;
  message.textContent = '';
  try {
    await ready;
    const body = new URLSearchParams(new FormData(form));
    body.set('nsg-x1-logon-button', 'Log On');
    const result = await authenticate('/nf/auth/doAuthentication.do', body);
    message.textContent = result.errors.join(' ') || 'Anmeldung fehlgeschlagen. Überprüfen Sie Ihre Zugangsdaten.';
  } catch {
    message.textContent = 'Die Anmeldung ist derzeit nicht möglich. Versuchen Sie es erneut.';
  } finally {
    form.elements.passwd.value = '';
    button.disabled = false;
  }
});