/**
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */

import React, {type ReactNode} from 'react';
import type {Props as NavbarItemConfig} from '@theme/NavbarItem';
import NavbarItem from '@theme/NavbarItem';
import NavbarColorModeToggle from '@theme/Navbar/ColorModeToggle';
import SearchBar from '@theme/SearchBar';
import {
  splitNavbarItems,
  useNavbarMobileSidebar,
  useThemeConfig,
} from '@docusaurus/theme-common';
import NavbarMobileSidebarToggle from '@theme/Navbar/MobileSidebar/Toggle';
import NavbarLogo from '@theme/Navbar/Logo';
import styles from './styles.module.css';

function useNavbarItems() {
  // TODO temporary casting until ThemeConfig type is improved
  return useThemeConfig().navbar.items as NavbarItemConfig[];
}

function NavbarItems({items}: {items: NavbarItemConfig[]}): JSX.Element {
  return (
    <>
      {items.map((item, i) => (
        <NavbarItem {...item} key={i} />
      ))}
    </>
  );
}

function NavbarContentLayout({
  left,
  right,
}: {
  left: ReactNode;
  right: ReactNode;
}) {
  return (
    <div className="navbar__inner">
      <div className="navbar__items">{left}</div>
      <div className="navbar__items navbar__items--right">{right}</div>
    </div>
  );
}

export default function NavbarContent(): JSX.Element {
  const mobileSidebar = useNavbarMobileSidebar();

  const items = useNavbarItems();
  const [leftItems, rightItems] = splitNavbarItems(items);

  const autoAddSearchBar = !items.some((item) => item.type === 'search');

  return (
    <NavbarContentLayout
      left={
        // TODO stop hardcoding items?
        <>
          {!mobileSidebar.disabled && <NavbarMobileSidebarToggle />}
          <NavbarLogo />
          <NavbarItems items={leftItems} />
        </>
      }
      right={
        // TODO stop hardcoding items?
        // Ask the user to add the respective navbar items => more flexible
        <>
          <NavbarItems items={rightItems} />
          <NavbarColorModeToggle className={styles.colorModeToggle} />
          {autoAddSearchBar && <SearchBar />}
        </>
      }
    />
  );
}