import AbstractVirtualNode from '../../core/base/virtual-node/abstract-virtual-node';
import { getNodeFromTree } from '../../core/utils';
import isHiddenWithCSS from './is-hidden-with-css';

/**
 * Determines if focusing has been disabled on an element.
 * @param {HTMLElement|VirtualNode} el The HTMLElement
 * @return {Boolean} Whether focusing has been disabled on an element.
 */
function focusDisabled(el) {
  const vNode = el instanceof AbstractVirtualNode ? el : getNodeFromTree(el);

  if (vNode.hasAttr('disabled')) {
    return true;
  }

  if (vNode.props.nodeName !== 'area') {
    // if the virtual node does not have an actual node, treat it
    // as not hidden
    if (!vNode.actualNode) {
      return false;
    }

    return isHiddenWithCSS(vNode.actualNode);
  }

  return false;
}

export default focusDisabled;