javascript:(function () {
  const bookmarkletName = 'BBCode Formatter';
  const description = 'Formats BBCode in textareas and editors without breaking inline tag structures.';
  console.log(`%c${bookmarkletName}`, 'font-weight: bold; color: green;', `– ${description}`);

  function formatBBCode(text) {
    return text

      .replace(/\[HEADING=2\]/g, '\n\n[HEADING=2]')
      .replace(/\[\/HEADING\]/g, '[/HEADING]\n\n')


      .replace(/\[LIST\]/g, '\n\n[LIST]')
      .replace(/\[\/LIST\]/g, '[/LIST]\n\n')
      .replace(/\[\*\]/g, '\n[*]')


      .replace(/\[\/IMG\](?!\s*\[\/URL\])/gi, '[/IMG]\n\n')


      .replace(/\r\n/g, '\n')
      .replace(/\r/g, '\n')


      .replace(/\n{3,}/g, '\n\n');
  }

  const activeEl = document.activeElement;
  const isTextInput = activeEl && (
    activeEl.tagName === 'TEXTAREA' ||
    (activeEl.tagName === 'INPUT' && activeEl.type === 'text') ||
    activeEl.isContentEditable
  );

  if (!isTextInput) {
    console.warn('No editable text area is focused.');
    return;
  }

  let originalText = activeEl.value || activeEl.innerText || '';
  let formattedText = '';
  const selectionStart = activeEl.selectionStart;
  const selectionEnd = activeEl.selectionEnd;

  if (typeof selectionStart === 'number' && typeof selectionEnd === 'number' && selectionStart !== selectionEnd) {
    const before = originalText.slice(0, selectionStart);
    const selected = originalText.slice(selectionStart, selectionEnd);
    const after = originalText.slice(selectionEnd);
    const formattedSelection = formatBBCode(selected);
    formattedText = before + formattedSelection + after;

    activeEl.value = formattedText;
    activeEl.setSelectionRange(before.length, before.length + formattedSelection.length);
  } else {
    formattedText = formatBBCode(originalText);
    if (activeEl.value !== undefined) {
      activeEl.value = formattedText;
    } else {
      activeEl.innerText = formattedText;
    }
  }

  console.log('✅ BBCode formatted successfully.');
})();