// ==UserScript==
// @name         DW Helper
// @namespace    http://veryroundbird.house/
// @version      1.1
// @description  adds some html shortcuts for the dreamwidth comment box
// @author       Carly Smallbird
// @match        https://*.dreamwidth.org/*
// @icon         https://www.google.com/s2/favicons?sz=64&domain=dreamwidth.org
// @grant        none
// ==/UserScript==

// the guts of this userscript
function main() {
  function insertText(before, after) {
    const textarea = document.querySelector('.qr-body textarea');
    const cursorPos = textarea.selectionStart;
    const selectionLength = textarea.selectionStart !== textarea.selectionEnd ? textarea.selectionEnd - textarea.selectionStart : 0;
    console.log(selectionLength);
    const v = document.querySelector('.qr-body textarea').value;
    const textBefore = v.substring(0, cursorPos);
    console.log(textBefore);
    const textAfter = v.substring(textarea.selectionEnd+1, v.length);
    console.log(textAfter);
    const textInner = v.substring(cursorPos+1, selectionLength+cursorPos+1);
    console.log(textInner);
    textarea.value = textBefore + before + textInner + after + textAfter;
  }

  function createButton(parent, text, before, after) {
    const btn = document.createElement('button');
    btn.type = 'button';
    btn.style.paddingTop = 0;
    btn.style.paddingBottom = 0;
    btn.textContent = text;
    btn.addEventListener('click', function() {
        insertText(before, after);
    });
    parent.append(btn);
  }

  const elt = document.createElement('div');
  elt.id = 'helper-buttons';
  createButton(elt, 'txt', `<span style="font-family: 'Courier New', monospace;">`, `</span>`);
  createButton(elt, 'b', `<b>`, `</b>`);
  createButton(elt, 'i', `<i>`, `</i>`);
  createButton(elt, 'sm', `<small>`, `</small>`);
  document.querySelector('body').addEventListener('click', function(e) {
    if (e.target.getAttribute('href').match('reply') !== null) {
      if (document.querySelectorAll('.qr-meta').length > 0 && document.querySelectorAll('.qr-meta .block-icon-controls #helper-buttons').length < 1) {
        e.preventDefault();
        const metaParent = document.querySelector('.qr-meta .block-icon-controls');
        metaParent.appendChild(elt);
      }
    }
  });
}

main();