<?php

namespace Lc\ShopBundle\Manager;

use Doctrine\ORM\EntityManagerInterface;
use Lc\ShopBundle\Context\UserInterface;
use Lc\ShopBundle\Event\EntityManager\EntityManagerEvent;
use Symfony\Component\EventDispatcher\EventDispatcherInterface;
use Symfony\Component\Security\Core\Security;

/**
 * class EntityManager.
 *
 * @author Simon Vieille <simon@deblan.fr>
 */
class EntityManager
{
        protected $eventDispatcher;
        protected $entityManager;
        protected $security;
        protected $userSystem = null;

        public function __construct(EventDispatcherInterface $eventDispatcher, EntityManagerInterface $entityManager,
                                    Security $security)
        {
                $this->eventDispatcher = $eventDispatcher;
                $this->entityManager = $entityManager;
                $this->security = $security;
        }


        public function getUserSystem()
        {
                if ($this->userSystem === null) {
                        $this->userSystem = $this->getRepository(UserInterface::class)->findOneByDevAlias('system');
                }
                return $this->userSystem;
        }

        public function getRepository($className)
        {
                return $this->entityManager->getRepository($this->getEntityName($className));
        }


        public function create($entity): self
        {

                if ($this->security->getUser() === null) {
                        if(method_exists($entity, 'setUpdatedBy')) {
                                $entity->setUpdatedBy($this->getUserSystem());
                        }
                        if(method_exists($entity, 'setCreadtedBy')) {
                                $entity->setCreadtedBy($this->getUserSystem());
                        }
                }

                $this->persist($entity);
                $this->eventDispatcher->dispatch(new EntityManagerEvent($entity), EntityManagerEvent::CREATE_EVENT);
                return $this;
        }

        public function update($entity): self
        {
                if ($this->security->getUser() === null) {
                        $entity->setUpdatedBy($this->getUserSystem());
                }
                $this->persist($entity);
                $this->eventDispatcher->dispatch(new EntityManagerEvent($entity), EntityManagerEvent::UPDATE_EVENT);

                return $this;
        }

        public function delete($entity): self
        {
                $this->remove($entity);
                $this->eventDispatcher->dispatch(new EntityManagerEvent($entity), EntityManagerEvent::DELETE_EVENT);

                return $this;
        }

        public function flush(): self
        {
                $this->entityManager->flush();

                return $this;
        }

        public function clear(): self
        {
                $this->entityManager->clear();

                return $this;
        }

        protected function persist($entity)
        {
                $this->entityManager->persist($entity);
        }

        public function getEntityName($className)
        {
                if (substr($className, -9) === 'Interface') {
                        return $this->entityManager->getClassMetadata($className)->getName();
                } else {
                        return $className;
                }

        }
}