<?php

namespace App\EventListener;

use App\Entity\Audit;
use Doctrine\Bundle\DoctrineBundle\EventSubscriber\EventSubscriberInterface;
use Doctrine\ORM\EntityManagerInterface;
use Doctrine\ORM\Event\OnFlushEventArgs;
use Doctrine\ORM\Events;
use Doctrine\Persistence\Event\LifecycleEventArgs;
use Symfony\Component\DependencyInjection\ParameterBag\ParameterBagInterface;
use Symfony\Component\Security\Core\Authentication\Token\Storage\TokenStorageInterface;

class AllSubscriber implements EventSubscriberInterface
{
    private $em;
    private $token;
    private $params;
    private $entity;

    public function __construct(EntityManagerInterface $em, TokenStorageInterface $token, ParameterBagInterface $params)
    {
        $this->em = $em;
        $this->token = $token;
        $this->params = $params;
    }

    public function getSubscribedEvents(): array
    {
        return [
            Events::preRemove,
            Events::onFlush,
        ];
    }

    public function preRemove(LifecycleEventArgs $args): void
    {
        $this->entity = $args->getObject();

        // Les enregistrements négatifs sont des enregistrements systeme indispensable
        if ($this->entity->getId() < 0) {
            throw new \Exception("Impossible de supprimer cet enregistrement. C'est un enregistrement système");
        }
    }

    public function onFlush(OnFlushEventArgs $eventArgs): void
    {
        $this->entity = $eventArgs->getEntityManager();

        if ($this->entity instanceof Audit || !$this->params->get('auditUse')) {
            return;
        }
        $this->audit();
    }

    private function audit()
    {
        $token = $this->token->getToken();
        if (!$token) {
            $user = 'job';
        } else {
            $user = $token->getUser();
            if ('anon.' != $user) {
                $user = $user->getUsername();
            } else {
                $user = 'job';
            }
        }

        $uow = $this->em->getUnitOfWork();
        $uow->computeChangeSets();

        foreach ($uow->getScheduledEntityInsertions() as $entity) {
            $metaCar = $this->em->getClassMetadata(get_class($entity));
            $className = str_replace('App\\Entity\\', '', $metaCar->getName());

            $nameold = '';
            if ($metaCar->hasField('name')) {
                $nameold = ' = '.$entity->getName();
            } elseif ($metaCar->hasField('label')) {
                $nameold = ' = '.$entity->getLabel();
            } elseif ($metaCar->hasField('username')) {
                $nameold = ' = '.$entity->getUsername();
            }

            $audit = new Audit();
            $audit->setDatesubmit(new \DateTime('now'));
            $audit->setEntityname($className);
            $audit->setEntityid($entity->getId());
            $audit->setUsername($user);
            $audit->setDescription('SUBMIT');
            $audit->setDetail(['id' => $entity->getId().$nameold]);

            $this->em->persist($audit);
            $uow->computeChangeSet($this->em->getClassMetadata(get_class($audit)), $audit);
        }

        foreach ($uow->getScheduledEntityDeletions() as $entity) {
            $metaCar = $this->em->getClassMetadata(get_class($entity));
            $className = str_replace('App\\Entity\\', '', $metaCar->getName());

            $nameold = '';
            if ($metaCar->hasField('name')) {
                $nameold = ' = '.$entity->getName();
            } elseif ($metaCar->hasField('label')) {
                $nameold = ' = '.$entity->getLabel();
            } elseif ($metaCar->hasField('username')) {
                $nameold = ' = '.$entity->getUsername();
            }

            $audit = new Audit();
            $audit->setDatesubmit(new \DateTime('now'));
            $audit->setEntityname($className);
            $audit->setEntityid($entity->getId());
            $audit->setUsername($user);
            $audit->setDescription('DELETE');
            $audit->setDetail(['id' => $entity->getId().$nameold]);

            $this->em->persist($audit);
            $uow->computeChangeSet($this->em->getClassMetadata(get_class($audit)), $audit);
        }

        foreach ($uow->getScheduledEntityUpdates() as $entity) {
            $changeSet = $uow->getEntityChangeSet($entity);

            // Unaudit field
            $className = str_replace('App\\Entity\\', '', $this->em->getClassMetadata(get_class($entity))->getName());
            switch ($className) {
                case 'Audit':
                    $changeSet = null;
                    break;

                case 'User':
                    unset($changeSet['visitecpt']);
                    unset($changeSet['visitedate']);
                    unset($changeSet['preference']);
                    unset($changeSet['keyvalue']);
                    unset($changeSet['keyexpire']);
                    unset($changeSet['apikey']);
                    unset($changeSet['password']);
                    unset($changeSet['passwordplain']);
                    unset($changeSet['salt']);
                    break;

                default:
                    unset($changeSet['apikey']);
                    break;
            }

            if ($changeSet) {
                $mychange = [];
                foreach ($changeSet as $key => $value) {
                    // Le champs modifié est-il une entité
                    $isentity0 = ($value[0] && is_object($value[0]) && get_class($value[0]) && 'DateTime' != get_class($value[0]));
                    $isentity1 = ($value[1] && is_object($value[1]) && get_class($value[1]) && 'DateTime' != get_class($value[1]));

                    if ($isentity0 || $isentity1) {
                        $nameold = '';
                        if ($isentity0) {
                            $metaCar = $this->em->getClassMetadata(get_class($value[0]));
                            if ($metaCar->hasField('name')) {
                                $nameold = ' = '.$value[0]->getName();
                            } elseif ($metaCar->hasField('label')) {
                                $nameold = ' = '.$value[0]->getLabel();
                            } elseif ($metaCar->hasField('username')) {
                                $nameold = ' = '.$value[0]->getUsername();
                            }

                            $nameold = $value[0]->getId().$nameold;
                        }

                        $namenew = '';
                        if ($isentity1) {
                            $metaCar = $this->em->getClassMetadata(get_class($value[1]));
                            if ($metaCar->hasField('name')) {
                                $namenew = ' = '.$value[1]->getName();
                            } elseif ($metaCar->hasField('label')) {
                                $namenew = ' = '.$value[1]->getLabel();
                            } elseif ($metaCar->hasField('username')) {
                                $namenew = ' = '.$value[1]->getUsername();
                            }

                            $namenew = $value[1]->getId().$namenew;
                        }

                        $mychange[$key] = [$nameold, $namenew];
                    } else {
                        $mychange[$key] = $value;
                    }
                }
                $audit = new Audit();
                $audit->setDatesubmit(new \DateTime('now'));
                $audit->setEntityname($className);
                $audit->setEntityid($entity->getId());
                $audit->setUsername($user);
                $audit->setDescription('UPDATE');
                $audit->setDetail($mychange);

                $this->em->persist($audit);
                $uow->computeChangeSet($this->em->getClassMetadata(get_class($audit)), $audit);
            }
        }
    }
}