import { css } from '@emotion/react';
import { spacing } from '@expo/styleguide';
import * as React from 'react';

import { SidebarNodeProps } from './Sidebar';
import { SidebarTitle, SidebarLink } from './index';

import { NavigationRoute } from '~/types/common';

export const SidebarGroup = ({ route, parentRoute }: SidebarNodeProps) => (
  <div css={STYLES_SECTION_CATEGORY}>
    {!shouldSkipTitle(route, parentRoute) && (
      <SidebarTitle>{route.sidebarTitle || route.name}</SidebarTitle>
    )}
    {(route.children || []).map(page => (
      <SidebarLink key={`${route.name}-${page.name}`} info={page}>
        {page.sidebarTitle || page.name}
      </SidebarLink>
    ))}
  </div>
);

const shouldSkipTitle = (info: NavigationRoute, parentGroup?: NavigationRoute) => {
  if (info.name === parentGroup?.name) {
    // If the title of the group is Expo SDK and the section within it has the same name
    // then we shouldn't show the title twice. You might want to organize your group like
    // so it is collapsable
    return true;
  } else if (
    info.children &&
    ((info.children[0] || {}).sidebarTitle || (info.children[0] || {}).name) === info.name
  ) {
    // If the first child post in the group has the same name as the group, then hide the
    // group title, lest we be very repetitive
    return true;
  }

  return false;
};

const STYLES_SECTION_CATEGORY = css({
  marginBottom: spacing[4] + spacing[0.5],
  marginTop: spacing[1],
});