/**
 * Copyright (c) 2017, Philip Walton <philip@philipwalton.com>
 */

import matches from './matches';
import parents from './parents';

/**
 * Gets the closest parent element that matches the passed selector.
 * @param {Element} element The element whose parents to check.
 * @param {string} selector The CSS selector to match against.
 * @param {boolean=} shouldCheckSelf True if the selector should test against
 *     the passed element itself.
 * @return {Element|undefined} The matching element or undefined.
 */
export default function closest(element, selector, shouldCheckSelf = false) {
  if (!(element && element.nodeType === 1 && selector)) return;
  const parentElements =
      (shouldCheckSelf ? [element] : []).concat(parents(element));

  for (let i = 0, parent; parent = parentElements[i]; i++) {
    if (matches(parent, selector)) return parent;
  }
}