(function(){
  // This snippet is a customized version of the code found on
  // stackoverflow. Since firefox only copies to the clipboard when the event
  // was triggered by a user, I had to add the button to the top of the page.
  // In chrome it might work without the need for a button, directly from a
  // bookmarklet. See the following for more information.
  // https://stackoverflow.com/questions/400212/how-do-i-copy-to-the-clipboard-in-javascript?page=1&tab=votes#tab-top

  // To create a bookmarklet you might want to use the following:
  // https://www.yourjs.com/bookmarklet/

  function copyTextToClipboardButton(copyText, buttonText, buttonStyle) {
    // Firefox only copies any text if the code doing it was triggered by a user
    // event. This is why we have to insert a button at the top of the page.
    var submitButton = document.createElement("button");

    Object.assign(submitButton.style, buttonStyle)

    submitButton.innerHTML = buttonText

    document.body.appendChild(submitButton);

    submitButton.addEventListener('click', function() {

      navigator.clipboard.writeText(copyText).then(function() {
        console.log(`Async: Copying to clipboard was successful!\n String was: ${copyText}`);
      }, function(err) {
        console.error('Async: Could not copy text: ', err);
      });

      document.body.removeChild(submitButton);
    });
  }

  const ticketNumber = $('#content h2').first().text().match(/#\d*/)[0];
  const ticketTitle  = $('#content .subject h3').text();

  const textToCopy =  `${ticketTitle} ${ticketNumber} - `;

  // Will be assigned to HTMLElement.style
  const buttonStyle = {
    position: 'fixed',
    top: 0,
    left: 0,
    width: '100%',
    fontWeight: 'bold'
  }

  copyTextToClipboardButton(
    textToCopy,
    'Copy Ticket for Tyme',
    buttonStyle
  );
})()