import {getNodeName, isNode} from '@floating-ui/utils/dom';
import type {ComponentPublicInstance} from 'vue-demi';

import type {MaybeElement} from '../types';

function isComponentPublicInstance(
  target: unknown,
): target is ComponentPublicInstance {
  return target != null && typeof target === 'object' && '$el' in target;
}

export function unwrapElement<T>(target: MaybeElement<T>) {
  if (isComponentPublicInstance(target)) {
    const element = target.$el as Exclude<
      MaybeElement<T>,
      ComponentPublicInstance
    >;

    return isNode(element) && getNodeName(element) === '#comment'
      ? null
      : element;
  }

  return target as Exclude<MaybeElement<T>, ComponentPublicInstance>;
}