import type {
  SidebarDivider as ISidebarDivider,
  SidebarItem as ISidebarItem,
  SidebarSectionHeader as ISidebarSectionHeader,
  NormalizedSidebarGroup,
} from '@rspress/core';

export const isSidebarDivider = (
  item:
    | NormalizedSidebarGroup
    | ISidebarItem
    | ISidebarDivider
    | ISidebarSectionHeader,
): item is ISidebarDivider => {
  return 'dividerType' in item;
};

export const isSidebarSingleFile = (
  item: ISidebarItem | NormalizedSidebarGroup,
) => !('items' in item) && 'link' in item;

export const isSidebarSectionHeader = (
  item:
    | NormalizedSidebarGroup
    | ISidebarItem
    | ISidebarDivider
    | ISidebarSectionHeader,
): item is ISidebarSectionHeader => {
  return 'sectionHeaderText' in item;
};

export const isSidebarGroup = (
  item:
    | NormalizedSidebarGroup
    | ISidebarItem
    | ISidebarDivider
    | ISidebarSectionHeader,
): item is NormalizedSidebarGroup => {
  return 'items' in item && Array.isArray(item.items);
};