'use client';
import { useEffect, useState } from 'react';
import { useDispatch, useSelector } from 'react-redux';
import Link from 'next/link';
import { IRootState } from '@/store';
import { toggleTheme, toggleSidebar } from '@/store/themeConfigSlice';
import Image from 'next/image';
import Dropdown from '@/components/dropdown';
import IconMenu from '@/components/icon/icon-menu';
import IconSun from '@/components/icon/icon-sun';
import IconMoon from '@/components/icon/icon-moon';
import IconUser from '@/components/icon/icon-user';
import IconLockDots from '@/components/icon/icon-lock-dots';
import IconLogout from '@/components/icon/icon-logout';
import { usePathname, useRouter } from 'next/navigation';

type UserData = { id: string; email: string; is_active: boolean };

export default function Header() {
  const pathname = usePathname();
  const dispatch = useDispatch();
  const router = useRouter();
  const themeConfig = useSelector((state: IRootState) => state.themeConfig);
  const isRtl = themeConfig.rtlClass === 'rtl';

  const [user, setUser] = useState<UserData | null>(null);
  const [loadingUser, setLoadingUser] = useState(true);

  const API = process.env.NEXT_PUBLIC_FASTAPI_URL;

  // highlight active menu
  useEffect(() => {
    const selector = document.querySelector(
      `ul.horizontal-menu a[href="${window.location.pathname}"]`
    );
    if (selector) {
      document
        .querySelectorAll('ul.horizontal-menu .nav-link.active, ul.horizontal-menu a.active')
        .forEach((el) => el.classList.remove('active'));
      selector.classList.add('active');
      const ul: any = selector.closest('ul.sub-menu');
      if (ul) {
        const ele: any = ul.closest('li.menu')?.querySelector('.nav-link');
        setTimeout(() => ele?.classList.add('active'));
      }
    }
  }, [pathname]);

  async function loadUser(signal?: AbortSignal) {
  try {
    const res = await fetch(`${API}/auth/me`, {
      credentials: 'include',
      cache: 'no-store',
      signal,
    });
    if (!res.ok) throw new Error();
    const data = await res.json().catch(() => null);
    setUser(data?.id ? (data as UserData) : null);
  } catch {
    setUser(null);
  } finally {
    setLoadingUser(false);
  }
}

  useEffect(() => {
    setLoadingUser(true);
    const controller = new AbortController();
    loadUser(controller.signal);
    return () => controller.abort();
  }, [pathname, API]);

  const handleLogout = async () => {
    try {
    await fetch(`${API}/auth/logout`, {
      method: 'POST',
      credentials: 'include',
      cache: 'no-store',
    });
  } catch (_) {
    // ignore
  } finally {
    setUser(null);
    window.location.href = '/login';
  }
  };

  return (
    <header className={`z-40 ${themeConfig.semidark && themeConfig.menu === 'horizontal' ? 'dark' : ''}`}>
      <div className="shadow-sm">
        <div className="relative flex w-full items-center bg-white px-5 py-2.5 dark:bg-rtgray-900">
          {/* Logo + mobile toggler */}
          <div className="horizontal-logo flex items-center justify-between ltr:mr-2 rtl:ml-2 lg:hidden">
            <div className="relative h-10 w-32 sm:h-11 sm:w-36 md:h-12 md:w-27 shrink-0 max-h-12">
              <Image
                src="/assets/images/newfulllogo.png"
                alt="logo"
                fill
                className="object-cover"
                priority
                sizes="(max-width: 640px) 8rem, (max-width: 768px) 9rem, (max-width: 1024px) 10rem, 10rem"
              />
            </div>

            <button
              type="button"
              onClick={() => dispatch(toggleSidebar())}
              className="collapse-icon flex p-2 rounded-full hover:bg-rtgray-200 dark:text-white dark:hover:bg-rtgray-700"
            >
              <IconMenu className="h-6 w-6" />
            </button>
          </div>

          {/* Right-side actions */}
          <div className="flex items-center justify-end space-x-1.5 ltr:ml-auto rtl:mr-auto rtl:space-x-reverse dark:text-[#d0d2d6] lg:space-x-2">
            {/* Theme toggle */}
            {themeConfig.theme === 'light' ? (
              <button
                onClick={() => dispatch(toggleTheme('dark'))}
                className="flex items-center p-2 rounded-full bg-white-light/40 hover:bg-white-light/90 dark:bg-rtgray-800 dark:hover:bg-rtgray-700"
              >
                <IconSun />
              </button>
            ) : (
              <button
                onClick={() => dispatch(toggleTheme('light'))}
                className="flex items-center p-2 rounded-full bg-white-light/40 hover:bg-white-light/90 dark:bg-rtgray-800 dark:hover:bg-rtgray-700"
              >
                <IconMoon />
              </button>
            )}

            {/* User dropdown */}
            <div className="dropdown flex shrink-0">
              {loadingUser ? (
                <div className="h-9 w-9 rounded-full animate-pulse bg-gray-300 dark:bg-rtgray-800" />
              ) : user ? (
                <Dropdown
                  placement={isRtl ? 'bottom-start' : 'bottom-end'}
                  btnClassName="relative group block"
                  panelClassName="rounded-lg shadow-lg border border-white/10 bg-rtgray-100 dark:bg-rtgray-800 p-2"
                  button={
                    <div className="h-9 w-9 rounded-full bg-rtgray-200 dark:bg-rtgray-800 flex items-center justify-center group-hover:bg-rtgray-300 dark:group-hover:bg-rtgray-700">
                      <IconUser className="h-5 w-5 text-gray-600 dark:text-gray-300" />
                    </div>
                  }
                >
                  <ul className="w-[230px] font-semibold text-dark">
                    <li className="px-4 py-4 flex items-center">
                      <div className="truncate ltr:pl-1.5 rtl:pr-4">
                        <h4 className="text-sm text-left">{user.email}</h4>
                      </div>
                    </li>
                    <li>
                      <Link href="/users/profile" className="dark:hover:text-white">
                        <IconUser className="h-4.5 w-4.5 mr-2" /> Profile
                      </Link>
                    </li>
                    <li>
                      <Link href="/auth/boxed-lockscreen" className="dark:hover:text-white">
                        <IconLockDots className="h-4.5 w-4.5 mr-2" /> Lock Screen
                      </Link>
                    </li>
                    <li className="border-t border-white-light dark:border-white-light/10">
                      <button onClick={handleLogout} className="flex w-full items-center py-3 text-danger">
                        <IconLogout className="h-4.5 w-4.5 mr-2 rotate-90" /> Sign Out
                      </button>
                    </li>
                  </ul>
                </Dropdown>
              ) : (
                <Link
                  href="/login"
                  className="rounded-md bg-yellow-400 px-3 py-1.5 text-black font-semibold hover:brightness-95"
                >
                  Sign In
                </Link>
              )}
            </div>
          </div>
        </div>
      </div>
    </header>
  );
}