import React, { useEffect, useRef } from 'react';
import Link from 'next/link';
import { useState } from 'react';
import { mdiChevronUp, mdiChevronDown } from '@mdi/js';
import BaseDivider from './BaseDivider';
import BaseIcon from './BaseIcon';
import UserAvatarCurrentUser from './UserAvatarCurrentUser';
import NavBarMenuList from './NavBarMenuList';
import { useAppDispatch, useAppSelector } from '../stores/hooks';
import { MenuNavBarItem } from '../interfaces';
import { setDarkMode } from '../stores/styleSlice';
import { logoutUser } from '../stores/authSlice';
import { useRouter } from 'next/router';
import ClickOutside from './ClickOutside';

type Props = {
  item: MenuNavBarItem;
};

export default function NavBarItem({ item }: Props) {
  const router = useRouter();
  const dispatch = useAppDispatch();
  const excludedRef = useRef(null);

  const navBarItemLabelActiveColorStyle = useAppSelector(
    (state) => state.style.navBarItemLabelActiveColorStyle,
  );
  const navBarItemLabelStyle = useAppSelector(
    (state) => state.style.navBarItemLabelStyle,
  );
  const navBarItemLabelHoverStyle = useAppSelector(
    (state) => state.style.navBarItemLabelHoverStyle,
  );

  const currentUser = useAppSelector((state) => state.auth.currentUser);

  const userName = `${currentUser?.firstName ? currentUser?.firstName : ''} ${
    currentUser?.lastName ? currentUser?.lastName : ''
  }`;

  const [isDropdownActive, setIsDropdownActive] = useState(false);

  useEffect(() => {
    return () => setIsDropdownActive(false);
  }, [router.pathname]);

  const componentClass = [
    'block lg:flex items-center relative cursor-pointer',
    isDropdownActive
      ? `${navBarItemLabelActiveColorStyle} dark:text-slate-400`
      : `${navBarItemLabelStyle} dark:text-white dark:hover:text-slate-400 ${navBarItemLabelHoverStyle}`,
    item.menu ? 'lg:py-2 lg:px-3' : 'py-2 px-3',
    item.isDesktopNoLabel ? 'lg:w-16 lg:justify-center' : '',
  ].join(' ');

  const itemLabel = item.isCurrentUser ? userName : item.label;

  const handleMenuClick = () => {
    if (item.menu) {
      setIsDropdownActive(!isDropdownActive);
    }

    if (item.isToggleLightDark) {
      dispatch(setDarkMode(null));
    }

    if (item.isLogout) {
      dispatch(logoutUser());
      router.push('/login');
    }
  };

  const getItemId = (label) => {
    switch (label) {
      case 'Light/Dark':
        return 'themeToggle';
      case 'Log out':
        return 'logout';
      default:
        return undefined;
    }
  };

  const NavBarItemComponentContents = (
    <>
      <div
        id={getItemId(itemLabel)}
        className={`flex items-center ${
          item.menu
            ? 'bg-gray-100 dark:bg-dark-800 lg:bg-transparent lg:dark:bg-transparent p-3 lg:p-0'
            : 'w-full'
        }`}
        onClick={handleMenuClick}
      >
        {item.icon && (
          <BaseIcon path={item.icon} size={22} className='transition-colors' />
        )}
        <span
          className={`px-2 transition-colors w-40 grow ${
            item.isDesktopNoLabel && item.icon ? 'lg:hidden' : ''
          }`}
        >
          {itemLabel}
        </span>
        {item.isCurrentUser && (
          <UserAvatarCurrentUser className='w-6 h-6 mr-3 inline-flex' />
        )}
        {item.menu && (
          <BaseIcon
            path={isDropdownActive ? mdiChevronUp : mdiChevronDown}
            className='hidden lg:inline-flex transition-colors'
          />
        )}
      </div>
      {item.menu && (
        <div
          className={`${
            !isDropdownActive ? 'lg:hidden' : ''
          } text-sm border-b border-gray-100 lg:border lg:bg-midnightBlueTheme-cardColor lg:absolute lg:top-full lg:left-0 lg:min-w-full lg:z-20 lg:rounded-lg lg:shadow-lg lg:dark:bg-dark-900 dark:border-dark-700`}
        >
          <ClickOutside
            onClickOutside={() => setIsDropdownActive(false)}
            excludedElements={[excludedRef]}
          >
            <NavBarMenuList menu={item.menu} />
          </ClickOutside>
        </div>
      )}
    </>
  );

  if (item.isDivider) {
    return <BaseDivider navBar />;
  }

  if (item.href) {
    return (
      <Link href={item.href} target={item.target} className={componentClass}>
        {NavBarItemComponentContents}
      </Link>
    );
  }

  return (
    <div className={componentClass} ref={excludedRef}>
      {NavBarItemComponentContents}
    </div>
  );
}