/**
 * Comment expand tools — legacy-style shortcode inserts ([code] [img=]).
 */
(function () {
  'use strict';

  function findTextarea(from) {
    var form = from && from.closest ? from.closest('form') : null;
    if (form) {
      return form.querySelector('textarea.grin, textarea#comment, textarea[name="comment"]');
    }
    return document.querySelector('#comment, textarea.grin');
  }

  function insertAtCursor(textarea, value) {
    if (!textarea) return;
    var start = textarea.selectionStart || 0;
    var end = textarea.selectionEnd || 0;
    var val = textarea.value || '';
    textarea.value = val.slice(0, start) + value + val.slice(end);
    var pos = start + value.length;
    textarea.selectionStart = textarea.selectionEnd = pos;
    textarea.focus();
    textarea.dispatchEvent(new Event('input'));
  }

  function restUpload(file) {
    var d = window.aksrtData || {};
    var url = d.commentUploadUrl || ((d.restUrl || '/wp-json/aksrt/v1').replace(/\/$/, '') + '/comment/upload-image');
    var fd = new FormData();
    fd.append('image', file);
    fd.append('file', file);
    return fetch(url, {
      method: 'POST',
      headers: { 'X-WP-Nonce': d.restNonce || d.nonce || '' },
      credentials: 'same-origin',
      body: fd
    }).then(function (r) { return r.json(); });
  }

  document.addEventListener('click', function (e) {
    var linkBtn = e.target && e.target.closest ? e.target.closest('.input-link-submit') : null;
    if (linkBtn) {
      e.preventDefault();
      var lbox = linkBtn.closest('.dropdown-link');
      var lta = lbox ? lbox.querySelector('textarea.link-textarea') : null;
      var url = lta ? (lta.value || '').trim() : '';
      if (!/^https?:\/\/\S+$/i.test(url)) {
        notyf('请输入有效链接地址', 'warning');
        return;
      }
      var ltext = lbox ? (lbox.querySelector('.link-text') || {}).value || '' : '';
      insertAtCursor(findTextarea(linkBtn), '[link=' + url + ']' + (ltext.trim() || url) + '[/link]');
      if (lta) lta.value = '';
      var lt = lbox ? lbox.querySelector('.link-text') : null;
      if (lt) lt.value = '';
      var lw = linkBtn.closest('span.dropup');
      if (lw) lw.classList.remove('open');
      return;
    }

    var codeBtn = e.target && e.target.closest ? e.target.closest('.input-code-submit') : null;
    if (codeBtn) {
      e.preventDefault();
      var box = codeBtn.closest('.dropdown-code, .input-expand-code');
      var ta = box ? box.querySelector('textarea') : null;
      var code = ta ? ta.value : '';
      if (!code || code.length < 2) {
        notyf('请输入代码', 'warning');
        return;
      }
      insertAtCursor(findTextarea(codeBtn), '[code]\n' + code + '\n[/code]\n');
      if (ta) ta.value = '';
      var w = codeBtn.closest('span.dropup');
      if (w) w.classList.remove('open');
      return;
    }

    var imgBtn = e.target && e.target.closest ? e.target.closest('.input-image-submit') : null;
    if (imgBtn) {
      e.preventDefault();
      var ibox = imgBtn.closest('.dropdown-image, .input-expand-image');
      var input = ibox ? ibox.querySelector('.input-image-url') : null;
      var url = input ? (input.value || '').trim() : '';
      if (!/^https?:\/\//i.test(url)) {
        notyf('请输入有效图片地址', 'warning');
        return;
      }
      insertAtCursor(findTextarea(imgBtn), '[img=' + url + ']');
      if (input) input.value = '';
      var iw = imgBtn.closest('span.dropup');
      if (iw) iw.classList.remove('open');
      return;
    }

    var upBtn = e.target && e.target.closest ? e.target.closest('.input-image-upload') : null;
    if (upBtn) {
      e.preventDefault();
      var fileInput = document.createElement('input');
      fileInput.type = 'file';
      fileInput.accept = 'image/jpeg,image/png,image/gif,image/webp';
      fileInput.addEventListener('change', function () {
        var file = fileInput.files && fileInput.files[0];
        if (!file) return;
        restUpload(file)
          .then(function (json) {
            var u = (json && (json.url || json.source_url || (json.data && (json.data.url || json.data.source_url)))) || '';
            if (!u) {
              notyf((json && json.message) || '上传失败', 'danger');
              return;
            }
            insertAtCursor(findTextarea(upBtn), '[img=' + u + ']');
          })
          .catch(function () { notyf('上传失败', 'danger'); });
      });
      fileInput.click();
      return;
    }
  });

  document.addEventListener('keydown', function (e) {
    if (!(e.ctrlKey || e.metaKey) || e.key !== 'Enter') return;
    var ta = e.target;
    if (!ta || ta.id !== 'comment') return;
    var form = ta.closest('#commentform');
    if (!form) return;
    e.preventDefault();
    var submit = form.querySelector('#submit, [type="submit"]');
    if (submit) submit.click();
  });
})();