<?php

namespace App\Security;

use App\Entity\User; 
use Doctrine\ORM\EntityManagerInterface;
use KnpU\OAuth2ClientBundle\Client\ClientRegistry;
use KnpU\OAuth2ClientBundle\Security\Authenticator\OAuth2Authenticator;
use Symfony\Component\HttpFoundation\RedirectResponse;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\Routing\RouterInterface;
use Symfony\Component\Security\Core\Authentication\Token\TokenInterface;
use Symfony\Component\Security\Core\Exception\AuthenticationException;
use Symfony\Component\Security\Http\Authenticator\Passport\Badge\UserBadge;
use Symfony\Component\Security\Http\Authenticator\Passport\Passport;
use Symfony\Component\Security\Http\Authenticator\Passport\SelfValidatingPassport;
use Symfony\Component\Security\Http\EntryPoint\AuthenticationEntryPointInterface;

class OpenStreetMapAuthenticator extends OAuth2Authenticator implements AuthenticationEntrypointInterface
{
    private $clientRegistry;
    private $entityManager;
    private $router;

    public function __construct(ClientRegistry $clientRegistry, EntityManagerInterface $entityManager, RouterInterface $router)
    {
        $this->clientRegistry = $clientRegistry;
        $this->entityManager = $entityManager;
        $this->router = $router;
    }

    public function supports(Request $request): ?bool
    {
        return $request->attributes->get('_route') === 'app_osm_callback';
    }

    public function authenticate(Request $request): Passport
    {
        $client = $this->clientRegistry->getClient('openstreetmap');
        $accessToken = $this->fetchAccessToken($client);

        return new SelfValidatingPassport(
            new UserBadge($accessToken->getToken(), function() use ($accessToken, $client) {
                $resourceOwner = $client->fetchUserFromToken($accessToken);

                $existingUser = $this->entityManager->getRepository(User::class)->findOneBy(['osmId' => $resourceOwner->getId()]);

                if ($existingUser) {
                    return $existingUser;
                }

                $user = new User();

                $user->setOsmId($resourceOwner->getId());
                $user->setUsername($resourceOwner->getDisplayName());

                $this->entityManager->persist($user);
                $this->entityManager->flush();

                return $user;
            })
        );
    }

    public function onAuthenticationSuccess(Request $request, TokenInterface $token, string $firewallName): ?Response
    {
        return null;
    }

    public function onAuthenticationFailure(Request $request, AuthenticationException $exception): ?Response
    {
        return null;
    }
    
    public function start(Request $request, AuthenticationException $authException = null): Response
    {
        return new RedirectResponse(
            '/',
            Response::HTTP_TEMPORARY_REDIRECT
        );
    }
}