/**
 * Mobile FixedInput + autoheight for comment respond (legacy parity).
 */
(function () {
  'use strict';

  function $(sel, root) {
    return (root || document).querySelector(sel);
  }

  function FixedInput(el, action) {
    if (!el) return;
    if (!el.dataset.fixedBound) {
      el.addEventListener('click', function (e) {
        if (e.target && e.target.closest && e.target.closest('.fixed-body')) {
          FixedInput(el, 'hide');
        }
      });
      el.dataset.fixedBound = '1';
    }
    if (action === 'show') {
      el.classList.add('show');
      window.setTimeout(function () {
        var field = el.querySelector('textarea, input');
        if (field) field.focus();
      }, 100);
      return;
    }
    if (action === 'hide') {
      var cancel = el.querySelector('#cancel-comment-reply-link');
      if (cancel) cancel.click();
      el.querySelectorAll('input,textarea').forEach(function (n) {
        try { n.blur(); } catch (e) {}
      });
      el.querySelectorAll('.dropup.open, .open').forEach(function (n) {
        n.classList.remove('open');
      });
      el.classList.remove('show');
    }
  }

  // Autoheight textareas.
  function bindAutoheight(ta) {
    if (!ta || ta.dataset.autoheightBound) return;
    ta.dataset.autoheightBound = '1';
    var max = parseInt(ta.getAttribute('maxheight') || '188', 10) || 188;
    var resize = function () {
      ta.style.height = 'auto';
      var h = Math.min(ta.scrollHeight, max);
      ta.style.height = h + 'px';
      ta.style.overflowY = ta.scrollHeight > max ? 'auto' : 'hidden';
    };
    ta.addEventListener('input', resize);
    resize();
  }

  function scopeFor(root) {
    return root && root.querySelectorAll ? root : document;
  }

  function scan(root) {
    var scope = scopeFor(root);
    if (scope.nodeType === 1 && scope.matches('textarea[autoheight], textarea.grin')) {
      bindAutoheight(scope);
    }
    scope.querySelectorAll('textarea[autoheight], textarea.grin').forEach(bindAutoheight);
  }

  var globalsBound = false;
  function bindGlobals() {
    if (globalsBound) return;
    globalsBound = true;
    document.addEventListener('click', function (e) {
      var trigger = e.target && e.target.closest ? e.target.closest('[fixed-input]') : null;
      if (!trigger) return;
      e.preventDefault();
      var targetSel = trigger.getAttribute('fixed-input') || '#respond';
      var panel = document.querySelector(targetSel);
      var comments = document.getElementById('comments');
      if (comments && comments.scrollIntoView) {
        comments.scrollIntoView({ behavior: 'smooth', block: 'start' });
      }
      FixedInput(panel, 'show');
    });
  }

  window.AksrtFrontend.register('aksrt-comment-fixed-input', function (root, reason) {
    bindGlobals();
    scan(root);
    root = root || document;
    var respond = root.nodeType === 1 && root.matches && root.matches('#respond')
      ? root
      : (root.querySelector ? root.querySelector('#respond') : document.getElementById('respond'));
    if (respond) {
      respond.aksrtFixedInput = function (action) {
        FixedInput(respond, action);
      };
    }
  });

  window.AksrtFixedInput = FixedInput;
})();