(function() {
  function y(s) {
    return s.replace(/[a-zA-Z]/g,(c)=>String.fromCharCode((c<="Z"?90:122)>=(c=c.charCodeAt(0)+13)?c:c-26));
  }

  const reveal = document.getElementById('email');
  const dialog = document.querySelector('dialog');
  reveal.addEventListener('click', () => {
    dialog.setAttribute('open', 'open');
  });

  function revealEmail() {
    const email = 'si' + atob('dGVAYW4=') + 'na.' + atob(y('oTqv')) + 't';

    const emailLink = document.createElement('a');
    emailLink.setAttribute('href', `mailto:${email}`);
    emailLink.innerText = email;

    reveal.replaceWith(emailLink);
  }

  function notInterested() {
    const notInterested = document.createElement('span');
    notInterested.innerText = 'I am not interested in your email.';

    reveal.replaceWith(notInterested);
  }

  const yesButton = dialog.querySelector('#yes-button');
  const noButton = dialog.querySelector('#no-button');

  yesButton.addEventListener('click', () => {
    dialog.removeAttribute('open');

    localStorage.canSeeEmail = false;

    notInterested();
  });

  noButton.addEventListener('click', () => {
    dialog.removeAttribute('open');

    localStorage.canSeeEmail = true;

    revealEmail();
  });

  if (localStorage.canSeeEmail === 'true') {
    revealEmail();
  } else if (localStorage.canSeeEmail === 'false') {
    notInterested();
  }
})();