<?php

namespace Chill\TaskBundle\Repository;

use Chill\TaskBundle\Entity\SingleTask;
use Doctrine\ORM\EntityManagerInterface;
use Doctrine\ORM\QueryBuilder;
use Symfony\Component\Security\Core\Security;

final class SingleTaskAclAwareRepository implements SingleTaskAclAwareRepositoryInterface
{
    private EntityManagerInterface $em;
    private Security $security;

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

    public function findByCurrentUsersTasks(
        ?string $pattern = null,
        ?array $flags = [],
        ?int $start = 0,
        ?int $limit = 50,
        ?array $orderBy = []
    ): array {
        $qb = $this->buildQueryMyTasks($pattern, $flags);
        $qb->select('t');

        $qb
            ->setFirstResult($start)
            ->setMaxResults($limit)
            ;

        foreach ($orderBy as $field => $direction) {
            $qb->addOrderBy('t.'.$field, $direction);
        }

        return $qb->getQuery()->getResult();
    }

    public function countByCurrentUsersTasks(
        ?string $pattern = null,
        ?array $flags = []
    ): int {
        $qb = $this->buildQueryMyTasks($pattern, $flags);
        $qb->select('COUNT(t)');

        return $qb->getQuery()->getSingleScalarResult();
    }

    public function buildQueryMyTasks(
        ?string $pattern = null,
        ?array $flags = []
    ): QueryBuilder {
       $qb = $this->em->createQueryBuilder();
       $qb
           ->from(SingleTask::class, 't')
           ->where($qb->expr()->eq('t.assignee', ':user'))
           ->setParameter('user', $this->security->getUser())
           ;

       if (!empty($pattern)) {
           $qb->andWhere($qb->expr()->like('LOWER(UNACCENT(t.title))', 'LOWER(UNACCENT(:pattern))'))
               ->setParameter('pattern', $pattern)
               ;
       }

       if (count($flags) > 0) {
           $orX = $qb->expr()->orX();
           $now = new \DateTime();

           if (\in_array('no-alert', $flags)) {
               $orX
                   ->add(
                       $qb->expr()->orX(
                           $qb->expr()->isNull('t.endDate'),
                           $qb->expr()->gte('t.endDate - COALESCE(t.warningInterval, :intervalBlank)', ':now')
                       )
                   );
               $qb
                   ->setParameter('intervalBlank', new \DateInterval('P0D'))
                   ->setParameter('now', $now)
               ;
           }

           if (\in_array('warning', $flags)) {
               $orX
                   ->add(
                       $qb->expr()->andX(
                           $qb->expr()->eq('t.closed', "'FALSE'"),
                           $qb->expr()->not($qb->expr()->isNull('t.endDate')),
                           $qb->expr()->not($qb->expr()->isNull('t.warningInterval')),
                           $qb->expr()->lte('t.endDate - t.warningInterval', ':now')
                       )
                   )
                   ;
               $qb
                   ->setParameter('now', $now)
               ;
           }

           if (\in_array('alert', $flags)) {
               $orX
                   ->add(
                       $qb->expr()->andX(
                           $qb->expr()->eq('t.closed', "'FALSE'"),
                           $qb->expr()->not($qb->expr()->isNull('t.endDate')),
                           $qb->expr()->lte('t.endDate', ':now')
                       )
                   )
               ;
               $qb
                   ->setParameter('now', $now)
               ;
           }

           $qb->andWhere($orX);
       }


       return $qb;
    }

}