import { CnPageScrollDomSelector } from '@/constant/page';

type IPopupContainer =
  | string
  | HTMLElement
  | ((target: HTMLElement) => HTMLElement);

export function getPopupContainer(
  popupContainer: IPopupContainer,
): IPopupContainer;
export function getPopupContainer(
  popupContainer?: null,
): (target?: HTMLElement | Element) => HTMLElement;

/**
 * 弹层挂载的容器节点
 */
export function getPopupContainer(
  popupContainer?: IPopupContainer,
): IPopupContainer | ((target: HTMLElement) => HTMLElement) {
  if (popupContainer) return popupContainer;

  return (target?: HTMLElement): HTMLElement => {
    if (!target) return document.body;

    return target.closest(CnPageScrollDomSelector) || document.body;
  };
}