'use client';

import { useRouter } from 'next/navigation';
import { useEffect, useState } from 'react';
import LoginPage from './pages/LoginPage.client.js';
import RegisterPage from './pages/RegisterPage.client.js';
import ForgotPasswordPage from './pages/ForgotPasswordPage.client.js';
import ResetPasswordPage from './pages/ResetPasswordPage.client.js';
import ConfirmEmailPage from './pages/ConfirmEmailPage.client.js';
import LogoutPage from './pages/LogoutPage.client.js';
import SetupAccountPage from './pages/SetupAccountPage.client.js';

const PAGE_COMPONENTS = {
  login:    LoginPage,
  register: RegisterPage,
  forgot:   ForgotPasswordPage,
  reset:    ResetPasswordPage,
  confirm:  ConfirmEmailPage,
  logout:   LogoutPage,
  setup:    SetupAccountPage,
};

export default function AuthPage({
  params,
  searchParams,
  registerAction,
  loginAction,
  forgotPasswordAction,
  resetPasswordAction,
  verifyEmailAction,
  setupAccountAction,
  logoutAction,
  setSessionCookieAction,
  redirectAfterLogin = '/',
  currentUser = null,
}) {
  const router = useRouter();
  const [currentPage, setCurrentPage] = useState(null);
  const [email, setEmail] = useState('');
  const [token, setToken] = useState('');

  useEffect(() => {
    const fromParams = params?.auth?.[0];
    if (fromParams) { setCurrentPage(fromParams); return; }
    if (typeof window !== 'undefined') {
      const match = window.location.pathname.match(/\/auth\/([^\/?]+)/);
      setCurrentPage(match ? match[1] : 'login');
    } else {
      setCurrentPage('login');
    }
  }, [params]);

  useEffect(() => {
    const run = async () => {
      // searchParams became a Promise in Next.js 15 — resolve both forms.
      const resolved = searchParams && typeof searchParams.then === 'function'
        ? await searchParams
        : searchParams;

      const urlParams = typeof window !== 'undefined'
        ? new URLSearchParams(window.location.search)
        : null;
      setEmail(resolved?.email || urlParams?.get('email') || '');
      setToken(resolved?.token || urlParams?.get('token') || '');
    };
    run();
  }, [searchParams]);

  const navigate = (page) => router.push(`/auth/${page}`);

  if (!currentPage) return null;

  const Page = PAGE_COMPONENTS[currentPage] || LoginPage;
  const common = { onNavigate: navigate, currentUser };

  switch (Page) {
    case LoginPage:
      return <Page {...common} onSubmit={loginAction} onSetSessionCookie={setSessionCookieAction} redirectAfterLogin={redirectAfterLogin} />;
    case RegisterPage:
      return <Page {...common} onSubmit={registerAction} />;
    case ForgotPasswordPage:
      return <Page {...common} onSubmit={forgotPasswordAction} />;
    case ResetPasswordPage:
      return <Page {...common} onSubmit={resetPasswordAction} email={email} token={token} />;
    case ConfirmEmailPage:
      return <Page {...common} onSubmit={verifyEmailAction} email={email} token={token} />;
    case SetupAccountPage:
      return <Page {...common} onSubmit={setupAccountAction} email={email} token={token} />;
    case LogoutPage:
      return <Page onLogout={logoutAction} onSetSessionCookie={setSessionCookieAction} />;
    default:
      return null;
  }
}