import {
  MoreActionItemFactory,
  MoreActionsPropItem,
} from '../../components/MoreActions/MoreActionsBase';

const isGroups = (
  items: MoreActionsPropItem[] | MoreActionsPropItem[][] | undefined,
): items is MoreActionsPropItem[][] => items != null && Array.isArray(items[0]);

/**
 * Pushes factory in the list of more actions with the condition that it does not already exist.
 * Does not modify the original items array.
 */
export function pushFactoryIfNotExists(
  items: MoreActionsPropItem[] | undefined,
  factory: MoreActionItemFactory,
): MoreActionsPropItem[] | undefined {
  if (!items) {
    return [factory];
  }

  const idx = items.findIndex((item) => item === factory);

  if (idx !== -1) {
    return items;
  }

  return [factory, ...items];
}

export function pushFactoryIfNotExistsOrAddToTopOfGroup(
  items: MoreActionsPropItem[] | MoreActionsPropItem[][] | undefined,
  factory: MoreActionItemFactory | undefined,
): MoreActionsPropItem[] | MoreActionsPropItem[][] | undefined {
  if (!factory) {
    return items;
  }

  if (!isGroups(items)) {
    return pushFactoryIfNotExists(items, factory);
  }

  const existsInSome = items.some((group) =>
    group.some((item) => item === factory),
  );

  if (existsInSome) {
    return items;
  }

  return [[factory, ...(items[0] || [])], ...items.slice(1)];
}