import React, { useState } from 'react';
import { ShoppingCartIcon } from './icons/ShoppingCartIcon';
import { DarkModeToggle } from './DarkModeToggle';
import { UnitSystemToggle } from './UnitSystemToggle';
import { Session } from '@supabase/supabase-js';
import { supabase } from '../services/supabaseClient';
import { AuthModal } from './AuthModal';
import { SignUpModal } from './SignUpModal';
import { UserIcon } from './icons/UserIcon';
import { Cog8ToothIcon } from './icons/Cog8ToothIcon';
import { MicrophoneIcon } from './icons/MicrophoneIcon';
import { Link } from 'react-router-dom';
import { ShieldCheckIcon } from './icons/ShieldCheckIcon';
import { Profile } from '../types';

type AuthStatus = 'SIGNED_OUT' | 'ANONYMOUS' | 'AUTHENTICATED';
interface HeaderProps {
  isDarkMode: boolean;
  toggleDarkMode: () => void;
  unitSystem: 'metric' | 'imperial';
  toggleUnitSystem: () => void;
  session: Session | null;
  authStatus: AuthStatus;
  profile: Profile | null;
  onOpenProfile: () => void;
  onOpenVoiceAssistant: () => void;
  onSignOut: () => void;
}

export const Header: React.FC<HeaderProps> = ({ isDarkMode, toggleDarkMode, unitSystem, toggleUnitSystem, session, authStatus, profile, onOpenProfile, onOpenVoiceAssistant, onSignOut }) => {
  const [isSignInModalOpen, setIsSignInModalOpen] = useState(false);
  const [isSignUpModalOpen, setIsSignUpModalOpen] = useState(false);

  const openSignIn = () => {
    setIsSignUpModalOpen(false);
    setIsSignInModalOpen(true);
  };

  const openSignUp = () => {
    setIsSignInModalOpen(false);
    setIsSignUpModalOpen(true);
  };

  
  return (
    <>
      <header className="bg-white dark:bg-gray-900 shadow-md sticky top-0 z-20">
        <div className="max-w-screen-2xl mx-auto px-4 sm:px-6 lg:px-8">
          <div className="flex items-center justify-between h-16">
            <div className="flex items-center">
              <ShoppingCartIcon className="h-8 w-8 text-brand-primary" />
              <h1 className="ml-3 text-2xl font-bold text-gray-800 dark:text-white">
                Flyer Crawler
              </h1>
            </div>
            <div className="flex items-center space-x-4 md:space-x-6">
              {session && (
                 <button
                    onClick={onOpenVoiceAssistant}
                    className="p-1.5 rounded-full hover:bg-gray-100 dark:hover:bg-gray-700/50 text-gray-500 dark:text-gray-400 transition-colors"
                    aria-label="Open voice assistant"
                    title="Voice Assistant"
                  >
                    <MicrophoneIcon className="w-5 h-5" />
                  </button>
              )}
              <UnitSystemToggle currentSystem={unitSystem} onToggle={toggleUnitSystem} />
              <DarkModeToggle isDarkMode={isDarkMode} onToggle={toggleDarkMode} />
              <div className="w-px h-6 bg-gray-200 dark:bg-gray-700 hidden sm:block"></div>
              {session ? (
                <div className="flex items-center space-x-3">
                  <div className="hidden md:flex items-center space-x-2 text-sm">
                     <UserIcon className="w-5 h-5 text-gray-500 dark:text-gray-400" />
                     {authStatus === 'AUTHENTICATED' ? (
                        <span className="font-medium text-gray-700 dark:text-gray-300">{session.user.email}</span>
                     ) : (
                        <span className="font-medium text-gray-500 dark:text-gray-400 italic">Guest</span>
                     )}
                  </div>
                  <button
                    onClick={onOpenProfile}
                    className="p-1.5 rounded-md hover:bg-gray-100 dark:hover:bg-gray-700/50 text-gray-500 dark:text-gray-400 transition-colors"
                    aria-label="Open my account settings"
                    title="My Account"
                  >
                    <Cog8ToothIcon className="w-5 h-5" />
                  </button>
                  {profile?.role === 'admin' && (
                    <Link to="/admin" className="p-1.5 rounded-md hover:bg-gray-100 dark:hover:bg-gray-700/50 text-gray-500 dark:text-gray-400 transition-colors" title="Admin Area">
                      <ShieldCheckIcon className="w-5 h-5" />
                    </Link>
                  )}
                  <button
                    onClick={onOpenProfile}
                    className="p-1.5 rounded-md hover:bg-gray-100 dark:hover:bg-gray-700/50 text-gray-500 dark:text-gray-400 transition-colors"
                    aria-label="Open my account settings"
                    title="My Account"
                  >
                    <Cog8ToothIcon className="w-5 h-5" />
                  </button>
                  <button
                    onClick={onSignOut}
                    className="text-sm font-semibold text-gray-600 hover:text-brand-primary dark:text-gray-300 dark:hover:text-brand-light transition-colors"
                  >
                    Logout
                  </button>
                </div>
              ) : (
                <div className="flex items-center space-x-2">
                  <button
                    onClick={openSignIn}
                    className="text-sm font-semibold text-gray-600 hover:text-brand-primary dark:text-gray-300 dark:hover:text-brand-light transition-colors"
                  >
                    Login
                  </button>
                  <button
                    onClick={openSignUp}
                    className="px-3 py-1.5 text-sm font-semibold text-white bg-brand-primary hover:bg-brand-secondary rounded-md transition-colors"
                  >
                    Sign Up
                  </button>
                </div>
              )}
            </div>
          </div>
        </div>
      </header>
      {isSignInModalOpen && supabase && (
        <AuthModal 
          isOpen={isSignInModalOpen} 
          onClose={() => setIsSignInModalOpen(false)}
          onSwitchToSignUp={openSignUp}
        />
      )}
      {isSignUpModalOpen && supabase && (
        <SignUpModal isOpen={isSignUpModalOpen} onClose={() => setIsSignUpModalOpen(false)} onSwitchToSignIn={openSignIn} />
      )}
    </>
  );
};