<?php
/**
 * Authserver, an OAuth2-based single-signon authentication provider written in PHP.
 *
 * Copyright (C) $today.date  Lars Vierbergen
 *
 * his program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
namespace vierbergenlars\AuthserverOAuthAccountBundle\EventListener;

use Registration\Event\RegistrationHandleEvent;
use Symfony\Component\EventDispatcher\EventSubscriberInterface;
use Registration\RegistrationEvents;
use Registration\Event\RegistrationFormEvent;
use Symfony\Component\Security\Core\Authentication\Token\Storage\TokenStorageInterface;
use vierbergenlars\AuthserverOAuthAccountBundle\Entity\TemporaryUser;
use Doctrine\ORM\EntityManagerInterface;
use App\Entity\EmailAddress;
use vierbergenlars\AuthserverOAuthAccountBundle\ResourceOwner\ResourceOwnerMap;
use EmailRulesBundle\EmailHandler\EmailRules;
use Registration\RegistrationHandler\RegistrationRules;

class RegistrationHandlerListener implements EventSubscriberInterface
{

    /**
     *
     * @var TokenStorageInterface
     */
    private $tokenStorage;

    /**
     *
     * @var EntityManagerInterface
     */
    private $em;

    /**
     *
     * @var ResourceOwnerMap
     */
    private $resourceOwnerMap;

    /**
     *
     * @var string[]
     */
    private $registrationFields;

    /**
     *
     * @var EmailRules|null
     */
    private $emailRules;

    /**
     *
     * @var RegistrationRules|null
     */
    private $registrationRules;

    public static function getSubscribedEvents()
    {
        return [
            RegistrationEvents::BUILD_FORM => [
                'onBuildForm',
                10
            ],
            RegistrationEvents::HANDLE_FORM => [
                'onHandleForm',
                0
            ]
        ];
    }

    public function __construct(EntityManagerInterface $em, TokenStorageInterface $tokenStorage, ResourceOwnerMap $resourceOwnerMap, array $registrationFields, EmailRules $emailRules = null, RegistrationRules $registrationRules = null)
    {
        $this->em = $em;
        $this->tokenStorage = $tokenStorage;
        $this->resourceOwnerMap = $resourceOwnerMap;
        $this->registrationFields = $registrationFields;
        $this->emailRules = $emailRules;
        $this->registrationRules = $registrationRules;
    }

    private function getTemporaryUser()
    {
        $token = $this->tokenStorage->getToken();
        if (!$token)
            return null;
        $user = $token->getUser();
        if ($user instanceof TemporaryUser)
            return $user;
        return null;
    }

    public function onBuildForm(RegistrationFormEvent $event)
    {
        if (($tempuser = $this->getTemporaryUser()) && $this->registrationFields['email']) {
            $user = $event->getFormBuilder()->getData();
            /* @var $user \App\Entity\User */
            if (!$user->getPrimaryEmailAddress())
                $user->addEmailAddress(new EmailAddress());
            if ($this->registrationFields['email'] === 'force') {
                $user->getPrimaryEmailAddress()->setEmail($tempuser->getEmail());
            }
            if ($tempuser->getEmail()) {
                if ($this->emailRules) {
                    $rule = $this->emailRules->getFirstRuleMatching($tempuser->getEmail());
                    if ($rule && $rule->isReject()) {
                        // Do not fill in an email address that will get rejected anyways.
                        return;
                    }
                }
                if ($this->registrationRules) {
                    $rule = $this->registrationRules->getFirstRuleMatching($tempuser->getEmail());
                    if (!$rule || !$rule->isSelfRegistration()) {
                        // Do not fill in an email address that is not elegible for self registration.
                        return;
                    }
                }
                $user->getPrimaryEmailAddress()->setEmail($tempuser->getEmail());
            }
        }
    }

    public function onHandleForm(RegistrationHandleEvent $event)
    {
        if ($event->isFailed())
            return;
        $user = $event->getForm()->getData();
        if (!$user)
            return;
        /* @var $user \App\Entity\User */
        if ($temporaryUser = $this->getTemporaryUser()) {
            if (!$this->resourceOwnerMap->getOwnerFromExternalUser($temporaryUser->getExternalUser())
                ->isTrustEmailVerification())
                return;
            if ($temporaryUser->getEmail() && $temporaryUser->getEmail() === $user->getPrimaryEmailAddress()->getEmail()) {
                $user->getPrimaryEmailAddress()->setVerified(true);
            }
        }
    }
}