<?php

/**
 * Chill is a software for social workers
 *
 * For the full copyright and license information, please view
 * the LICENSE file that was distributed with this source code.
 */

declare(strict_types=1);

namespace Chill\MainBundle\Repository;

use Chill\MainBundle\Entity\GroupCenter;
use Chill\MainBundle\Entity\User;
use Doctrine\ORM\EntityManagerInterface;
use Doctrine\ORM\EntityRepository;
use Doctrine\ORM\Query\ResultSetMapping;
use Doctrine\ORM\Query\ResultSetMappingBuilder;
use Doctrine\ORM\QueryBuilder;

use function count;

final class UserRepository implements UserRepositoryInterface
{
    private EntityManagerInterface $entityManager;

    private EntityRepository $repository;

    public function __construct(EntityManagerInterface $entityManager)
    {
        $this->entityManager = $entityManager;
        $this->repository = $entityManager->getRepository(User::class);
    }

    public function countBy(array $criteria): int
    {
        return $this->repository->count($criteria);
    }

    public function countByActive(): int
    {
        return $this->countBy(['enabled' => true]);
    }

    public function countByNotHavingAttribute(string $key): int
    {
        $rsm = new ResultSetMapping();
        $rsm->addScalarResult('count', 'count');

        $sql = 'SELECT count(*) FROM users u WHERE NOT attributes ?? :key OR attributes IS NULL AND enabled IS TRUE';

        return $this->entityManager->createNativeQuery($sql, $rsm)->setParameter(':key', $key)->getSingleScalarResult();
    }

    public function countByUsernameOrEmail(string $pattern): int
    {
        $qb = $this->queryByUsernameOrEmail($pattern);

        $qb->select('COUNT(u)');

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

    public function find($id, $lockMode = null, $lockVersion = null): ?User
    {
        return $this->repository->find($id, $lockMode, $lockVersion);
    }

    /**
     * @return User[]
     */
    public function findAll(): array
    {
        return $this->repository->findAll();
    }

    /**
     * @param mixed|null $limit
     * @param mixed|null $offset
     *
     * @return User[]
     */
    public function findBy(array $criteria, ?array $orderBy = null, $limit = null, $offset = null): array
    {
        return $this->repository->findBy($criteria, $orderBy, $limit, $offset);
    }

    /**
     * @return array|User[]
     */
    public function findByActive(?array $orderBy = null, ?int $limit = null, ?int $offset = null): array
    {
        return $this->findBy(['enabled' => true], $orderBy, $limit, $offset);
    }

    /**
     * Find users which does not have a key on attribute column.
     *
     * @return array|User[]
     */
    public function findByNotHavingAttribute(string $key, ?int $limit = null, ?int $offset = null): array
    {
        $rsm = new ResultSetMappingBuilder($this->entityManager);
        $rsm->addRootEntityFromClassMetadata(User::class, 'u');

        $sql = 'SELECT ' . $rsm->generateSelectClause() . ' FROM users u WHERE NOT attributes ?? :key OR attributes IS NULL AND enabled IS TRUE';

        if (null !== $limit) {
            $sql .= " LIMIT {$limit}";
        }

        if (null !== $offset) {
            $sql .= " OFFSET {$offset}";
        }

        return $this->entityManager->createNativeQuery($sql, $rsm)->setParameter(':key', $key)->getResult();
    }

    public function findByUsernameOrEmail(string $pattern, ?array $orderBy = [], ?int $limit = null, ?int $offset = null): array
    {
        $qb = $this->queryByUsernameOrEmail($pattern);

        $qb->select('u');

        if (null !== $limit) {
            $qb->setMaxResults($limit);
        }

        if (null !== $offset) {
            $qb->setFirstResult($offset);
        }

        foreach ($orderBy as $field => $order) {
            $qb->addOrderBy('u.' . $field, $order);
        }

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

    public function findOneBy(array $criteria, ?array $orderBy = null): ?User
    {
        return $this->repository->findOneBy($criteria, $orderBy);
    }

    public function findOneByUsernameOrEmail(string $pattern)
    {
        $qb = $this->queryByUsernameOrEmail($pattern);

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

    /**
     * Get the users having a specific flags.
     *
     * If provided, only the users amongst "filtered users" are searched. This
     * allows to make a first search amongst users based on role and center
     * and, then filter those users having some flags.
     *
     * @param \Chill\MainBundle\Entity\User[] $amongstUsers
     * @param mixed $flag
     */
    public function findUsersHavingFlags($flag, array $amongstUsers = []): array
    {
        $gcs = $this
            ->entityManager
            ->createQuery(
                'SELECT DISTINCT gc ' .
                'FROM ' . GroupCenter::class . ' gc ' .
                'JOIN gc.permissionsGroup pg ' .
                'WHERE ' .
                'JSONB_EXISTS_IN_ARRAY(pg.flags, :flag) = :true '
            )
            ->setParameters([
                'true' => true,
                'flag' => $flag,
            ])
            ->getResult();

        if (count($gcs) === 0) {
            return [];
        }

        $qb = $this->entityManager->createQueryBuilder();
        $qb
            ->select('DISTINCT u')
            ->from(User::class, 'u')
            ->where("u.enabled = 'TRUE'");

        $orx = $qb->expr()->orX();

        foreach ($gcs as $i => $gc) {
            $orx->add(':gc_' . $i . ' MEMBER OF u.groupCenters');
            $qb->setParameter('gc_' . $i, $gc);
        }

        $qb->andWhere($orx);

        if ([] !== $amongstUsers) {
            $qb
                ->andWhere($qb->expr()->in('u', ':amongstUsers'))
                ->setParameter('amongstUsers', $amongstUsers);
        }

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

    public function getClassName(): string
    {
        return User::class;
    }

    private function queryByUsernameOrEmail(string $pattern): QueryBuilder
    {
        $qb = $this->entityManager->createQueryBuilder()->from(User::class, 'u');

        $searchByPattern = $qb->expr()->orX();

        $searchByPattern
            ->add($qb->expr()->like('u.usernameCanonical', 'CONCAT(\'%\', LOWER(UNACCENT(:pattern)),  \'%\')'))
            ->add($qb->expr()->like('u.emailCanonical', 'CONCAT(\'%\', LOWER(UNACCENT(:pattern)), \'%\')'));

        $qb
            ->where($searchByPattern)
            ->setParameter('pattern', $pattern);

        return $qb;
    }
}