<?php

namespace App\Service\Article;

use App\Entity\Article;
use App\Hydrator\DoctrineObject;
use App\Service\EntityServiceInterface;
use Doctrine\ORM\EntityManager;
use Doctrine\ORM\Query;
use Exception;

class ArticleService implements EntityServiceInterface
{

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

    /**
     * @var DoctrineObject
     */
    private $hydrator;

    public function __construct(EntityManager $em, DoctrineObject $hydrator)
    {
        $this->em       = $em;
        $this->hydrator = $hydrator;
    }

    public function getList()
    {
        $qb       = $this->em->createQueryBuilder();
        $entities = $qb->select('a,u,c')
            ->from(Article::class, 'a')
            ->leftJoin('a.author', 'u')
            ->leftJoin('a.comments', 'c')
            ->getQuery()
            ->getArrayResult();
        return $entities;
    }

    public function get($id)
    {
        $qb = $this->em->createQueryBuilder();

        $entity = $qb->select('a,u,c')
            ->from(Article::class, 'a')
            ->leftJoin('a.author', 'u')
            ->leftJoin('a.comments', 'c')
            ->where('a.id = :aid')
            ->setParameter('aid', $id)
            ->getQuery()
            ->getOneOrNullResult(Query::HYDRATE_ARRAY);

        return $entity;
    }

    public function create($data)
    {
        $entity = $this->hydrator->hydrate($data, new Article());
        try {
            $this->em->persist($entity);
            $this->em->flush();
        } catch (Exception $ex) {
            return false;
        }
        return $entity;
    }

    public function modify($id, $data)
    {
        if (null === ($entity = $this->em->find(Article::class, $id))) {
            return false;
        }

        $entity = $this->hydrator->hydrate($data, $entity);
        $this->em->persist($entity);
        $this->em->flush();

        return $entity;
    }

    public function delete($id)
    {
        if (null === ($entity = $this->em->find(Article::class, $id))) {
            return false;
        }

        try {
            $this->em->remove($entity);
            $this->em->flush();
        } catch (Exception $ex) {
            return false;
        }

        return true;
    }
}