<?php

/*
 * Chill is a software for social workers
 *
 * Copyright (C) 2014-2021, Champs Libres Cooperative SCRLFS,
 * <http://www.champs-libres.coop>, <info@champs-libres.coop>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

namespace Chill\PersonBundle\Entity;

use Chill\MainBundle\Doctrine\Model\TrackUpdateInterface;
use Chill\MainBundle\Doctrine\Model\TrackCreationInterface;
use Chill\MainBundle\Entity\HasCentersInterface;
use Chill\MainBundle\Entity\HasScopesInterface;
use Chill\MainBundle\Entity\Scope;
use Chill\MainBundle\Entity\Address;
use Chill\MainBundle\Entity\Center;
use Chill\PersonBundle\Entity\AccompanyingPeriod\AccompanyingPeriodWork;
use Chill\PersonBundle\Entity\AccompanyingPeriod\ClosingMotive;
use Chill\PersonBundle\Entity\AccompanyingPeriod\Comment;
use Chill\PersonBundle\Entity\AccompanyingPeriod\Origin;
use Chill\PersonBundle\Entity\AccompanyingPeriod\Resource;
use Chill\PersonBundle\Entity\SocialWork\SocialIssue;
use Chill\ThirdPartyBundle\Entity\ThirdParty;
use DateTimeInterface;
use Doctrine\Common\Collections\ArrayCollection;
use Doctrine\Common\Collections\Collection;
use Doctrine\ORM\Mapping as ORM;
use Symfony\Component\Validator\Context\ExecutionContextInterface;
use Chill\MainBundle\Entity\User;
use Symfony\Component\Serializer\Annotation\Groups;
use Symfony\Component\Serializer\Annotation\DiscriminatorMap;
use Symfony\Component\Validator\Constraints as Assert;

/**
 * AccompanyingPeriod Class
 *
 * @ORM\Entity
 * @ORM\Table(name="chill_person_accompanying_period")
 * @DiscriminatorMap(typeProperty="type", mapping={
 *  "accompanying_period"=AccompanyingPeriod::class
 *  })
 */
class AccompanyingPeriod implements TrackCreationInterface, TrackUpdateInterface,
    HasScopesInterface, HasCentersInterface
{
    /**
     * Mark an accompanying period as "occasional"
     *
     * used in INTENSITY
     */
    public const INTENSITY_OCCASIONAL = 'occasional';

    /**
     * Mark an accompanying period as "regular"
     *
     * used in INTENSITY
     */
    public const INTENSITY_REGULAR = 'regular';

    public const INTENSITIES = [self::INTENSITY_OCCASIONAL, self::INTENSITY_REGULAR];

    /**
     * Mark an accompanying period as "draft".
     *
     * This means that the accompanying period is not yet
     * confirmed by the creator
     */
    public const STEP_DRAFT = 'DRAFT';

    /**
     * Mark an accompanying period as "confirmed".
     *
     * This means that the accompanying period **is**
     * confirmed by the creator
     */
    public const STEP_CONFIRMED = 'CONFIRMED';

    /**
     * @var integer
     *
     * @ORM\Id
     * @ORM\Column(name="id", type="integer")
     * @ORM\GeneratedValue(strategy="AUTO")
     * @Groups({"read"})
     */
    private $id;

    /**
     * @var \DateTime
     *
     * @ORM\Column(type="date")
     * @Groups({"read", "write"})
     */
    private $openingDate;

    /**
     * @var \DateTime
     *
     * @ORM\Column(type="date", nullable=true)
     * @Groups({"read", "write"})
     */
    private $closingDate = null;

    /**
     * @var string
     *
     * @ORM\Column(type="text")
     * @Groups({"read", "write"})
     */
    private $remark = '';

    /**
     * @var Collection
     *
     * @ORM\OneToMany(targetEntity="Chill\PersonBundle\Entity\AccompanyingPeriod\Comment",
     *       mappedBy="accompanyingPeriod",
     *       cascade={"persist", "remove"},
     *       orphanRemoval=true
     *     )
     */
    private $comments;

    /**
     * @ORM\ManyToOne(
     *    targetEntity=Comment::class
     * )
     * @Groups({"read"})
     */
    private ?Comment $initialComment = null;

    /**
     * @var Collection
     *
     * @ORM\OneToMany(targetEntity=AccompanyingPeriodParticipation::class,
     *     mappedBy="accompanyingPeriod",
     *     cascade={"persist", "refresh", "remove", "merge", "detach"})
     * @Groups({"read"})
     */
    private $participations;

    /**
     * @var AccompanyingPeriod\ClosingMotive
     *
     * @ORM\ManyToOne(
     *     targetEntity="Chill\PersonBundle\Entity\AccompanyingPeriod\ClosingMotive")
     * @ORM\JoinColumn(nullable=true)
     * @Groups({"read", "write"})
     */
    private $closingMotive = null;

    /**
     * @ORM\ManyToOne(targetEntity=User::class)
     * @ORM\JoinColumn(nullable=true)
     * @Groups({"read", "write"})
     */
    private $user;

    /**
     * @ORM\ManyToOne(targetEntity=User::class)
     * @ORM\JoinColumn(nullable=true)
     * @Groups({"read"})
     */
    private $createdBy;

    /**
     * @var string
     * @ORM\Column(type="string", length=32, nullable=true)
     * @Groups({"read"})
     */
    private $step = self::STEP_DRAFT;

    /**
     * @ORM\ManyToOne(targetEntity=Origin::class)
     * @ORM\JoinColumn(nullable=true)
     * @Groups({"read", "write"})
     */
    private $origin;

    /**
     * @var string
     * @ORM\Column(type="string", nullable=true)
     * @Groups({"read", "write"})
     */
    private $intensity;

    /**
     * @var Collection
     * @ORM\ManyToMany(
     *     targetEntity=Scope::class,
     *     cascade={}
     *     )
     * @ORM\JoinTable(
     *     name="accompanying_periods_scopes",
     *     joinColumns={@ORM\JoinColumn(name="accompanying_period_id", referencedColumnName="id")},
     *     inverseJoinColumns={@ORM\JoinColumn(name="scope_id", referencedColumnName="id")}
     * )
     * @Groups({"read"})
     */
    private $scopes;

    /**
     * @ORM\ManyToOne(targetEntity=Person::class, inversedBy="accompanyingPeriodRequested")
     * @ORM\JoinColumn(nullable=true)
     */
    private $requestorPerson;

    /**
     * @ORM\ManyToOne(targetEntity=ThirdParty::class)
     * @ORM\JoinColumn(nullable=true)
     */
    private $requestorThirdParty;

    /**
     * @var bool
     * @ORM\Column(type="boolean", options={"default": false} )
     * @Groups({"read", "write"})
     */
    private $requestorAnonymous = false;

    /**
     * @var bool
     * @ORM\Column(type="boolean", options={"default": false} )
     * @Groups({"read", "write"})
     */
    private $emergency = false;

    /**
     * @var bool
     * @ORM\Column(type="boolean", options={"default": false} )
     * @Groups({"read", "write"})
     */
    private $confidential = false;

    /**
     * @var Collection
     *
     * @ORM\OneToMany(
     *     targetEntity="Chill\PersonBundle\Entity\AccompanyingPeriod\Resource",
     *     mappedBy="accompanyingPeriod",
     *     cascade={"persist", "remove"},
     *     orphanRemoval=true
     * )
     * @Groups({"read"})
     */
    private $resources;

    /**
     * @ORM\ManyToMany(
     *     targetEntity=SocialIssue::class
     * )
     * @ORM\JoinTable(
     *     name="chill_person_accompanying_period_social_issues"
     *  )
     * @Groups({"read"})
     */
    private Collection $socialIssues;

    /**
     * @ORM\Column(type="datetime", nullable=true, options={"default": NULL})
     */
    private \DateTimeInterface $createdAt;

    /**
     * @ORM\ManyToOne(
     *    targetEntity=User::class
     * )
     */
    private User $updatedBy;

    /**
     * @ORM\Column(type="datetime", nullable=true, options={"default": NULL})
     */
    private \DateTimeInterface $updatedAt;

    /**
     * @ORM\OneToMany(
     *  targetEntity=AccompanyingPeriodWork::class,
     *  mappedBy="accompanyingPeriod"
     * )
     * @Assert\Valid(traverse=true)
     */
    private Collection $works;

    /**
     * @ORM\ManyToOne(
     *  targetEntity=Person::class,
     *  inversedBy="periodLocatedOn"
     * )
     */
    private ?Person $personLocation = null;


    /**
     * @ORM\ManyToOne(
     *  targetEntity=Address::class
     * )
     */
    private ?Address $addressLocation = null;

    /**
     * AccompanyingPeriod constructor.
     *
     * @param \DateTime $dateOpening
     * @uses AccompanyingPeriod::setClosingDate()
     */
    public function __construct(\DateTime $dateOpening = null) {
        $this->setOpeningDate($dateOpening ?? new \DateTime('now'));
        $this->participations = new ArrayCollection();
        $this->scopes = new ArrayCollection();
        $this->socialIssues = new ArrayCollection();
        $this->comments = new ArrayCollection();
        $this->works = new ArrayCollection();
    }

    /**
     * Get id
     *
     * @return integer
     */
    public function getId()
    {
        return $this->id;
    }

    /**
     * Set openingDate
     *
     * @param \DateTime $dateOpening
     * @return AccompanyingPeriod
     */
    public function setOpeningDate($openingDate)
    {
        $this->openingDate = $openingDate;

        return $this;
    }

    /**
     * Get openingDate
     *
     * @return \DateTime
     */
    public function getOpeningDate()
    {
        return $this->openingDate;
    }

    /**
     * Set closingDate
     *
     * For closing a Person file, you should use Person::setClosed instead.
     *
     * @param \DateTime $dateClosing
     * @return AccompanyingPeriod
     *
     */
    public function setClosingDate($closingDate)
    {
        $this->closingDate = $closingDate;

        return $this;
    }

    /**
     * Get closingDate
     *
     * @return \DateTime
     */
    public function getClosingDate(): ?\DateTime
    {
        return $this->closingDate;
    }

    /**
     * @return boolean
     */
    public function isOpen(): bool
    {
        if ($this->getOpeningDate() > new \DateTimeImmutable('now')) {
            return false;
        }

        if ($this->getClosingDate() === null) {
            return true;
        }

        return false;
    }

    public function setRemark(string $remark = null): self
    {
        $this->remark = (string) $remark;

        return $this;
    }

    public function getRemark(): string
    {
        return $this->remark;
    }

    /**
     * @Groups({"read"})
     */
    public function getComments(): Collection
    {
        return $this->comments->filter(function (Comment $c) {
            return $c !== $this->initialComment;
        });
    }

    public function addComment(Comment $comment): self
    {
        $this->comments[] = $comment;
        $comment->setAccompanyingPeriod($this);

        return $this;
    }

    public function removeComment(Comment $comment): void
    {
        $comment->setAccompanyingPeriod(null);
        $this->comments->removeElement($comment);
    }

    /**
     * @Groups({"write"})
     */
    public function setInitialComment(?Comment $comment = null): self
    {
        if (NULL !== $this->initialComment) {
            $this->removeComment($this->initialComment);
        }
        if ($comment instanceof Comment) {
            $this->addComment($comment);
        }

        $this->initialComment = $comment;

        return $this;
    }

    /**
     * @Groups({"read"})
     */
    public function getInitialComment(): ?Comment
    {
        return $this->initialComment;
    }

    /**
     * Get Participations Collection
     */
    public function getParticipations(): Collection
    {
        return $this->participations;
    }

    /**
     * Get the participation containing a person
     */
    public function getParticipationsContainsPerson(Person $person): Collection
    {
        return $this
            ->getParticipations()
            ->filter(
                static function(AccompanyingPeriodParticipation $participation) use ($person): bool {
                    return $person === $participation->getPerson();
                }
            );
    }

    /**
     * Get the opened participation containing a person
     *
     * "Open" means that the closed date is NULL
     */
    public function getOpenParticipationContainsPerson(Person $person): ?AccompanyingPeriodParticipation
    {
        $collection = $this
            ->getParticipationsContainsPerson($person)
            ->filter(
                static function(AccompanyingPeriodParticipation $participation): bool {
                    return null === $participation->getEndDate();
                }
            );

        return $collection->count() > 0 ? $collection->first() : NULL;
    }

    public function getOpenParticipations(): Collection
    {
        return $this
            ->getParticipations()
            ->filter(
                static function(AccompanyingPeriodParticipation $participation): bool {
                    return null === $participation->getEndDate();
                }
            );
    }

    public function getCurrentParticipations(): Collection
    {
        return $this->getOpenParticipations();
    }

    /**
     *  Return an array with open participations sorted by household
     * [
     *   [
     *     "household" => Household x,
     *     "members" => [
     *        Participation y , Participation z, ...
     *      ]
     *   ],
     * ]
     *
     */
    public function actualParticipationsByHousehold(): array
    {
        $participations = $this->getOPenParticipations()->toArray();

        $households = [];
        foreach ($participations as $p) {
            $households[] = $p->getPerson()->getCurrentHousehold();
        }
        $households = array_unique($households, SORT_REGULAR);

        $array = [];
        foreach ($households as $household) {
            $members = [];
            foreach ($participations as $p) {
                if ($household === $p->getPerson()->getCurrentHousehold()) {
                    $members[] = array_shift($participations);
                } else {
                    $participations[] = array_shift($participations);
                }
            }
            $array[] = [ 'household' => $household, 'members' => $members ];
        }

        return $array;
    }

    /**
     * Return true if the accompanying period contains a person.
     *
     * **Note**: this participation can be opened or not.
     */
    public function containsPerson(Person $person): bool
    {
        return $this->getParticipationsContainsPerson($person)->count() > 0;
    }

    /**
     * Open a new participation for a person
     */
    public function createParticipationFor(Person $person): AccompanyingPeriodParticipation
    {
        $participation = new AccompanyingPeriodParticipation($this, $person);
        $this->participations[] = $participation;

        return $participation;
    }

    public function addPerson(Person $person = null): self
    {
        if (NULL !== $person) {
            $this->createParticipationFor($person);
        }

        return $this;
    }

    /**
     * Close a participation for a person
     *
     * Search for the person's participation and set the end date at
     * 'now'.
     *
     * @return void
     */
    public function closeParticipationFor($person): ?AccompanyingPeriodParticipation
    {
        $participation = $this->getOpenParticipationContainsPerson($person);

        if ($participation instanceof AccompanyingPeriodParticipation) {
            $participation->setEndDate(new \DateTimeImmutable('now'));
        }

        return $participation;
    }


    /**
     * Remove Person
     */
    public function removePerson(Person $person): self
    {
        $this->closeParticipationFor($person);

        return $this;
    }


    public function getClosingMotive(): ?ClosingMotive
    {
        return $this->closingMotive;
    }

    public function setClosingMotive(ClosingMotive $closingMotive = null): self
    {
        $this->closingMotive = $closingMotive;

        return $this;
    }

    /**
     * If the period can be reopened.
     *
     * This function test if the period is closed and if the period is the last
     * for the given person
     */
    public function canBeReOpened(Person $person): bool
    {
        if ($this->isOpen() === true) {
            return false;
        }

        $participation = $this->getOpenParticipationContainsPerson($person);

        if (null === $participation)
        {
            return false;
        }

        $periods = $participation->getPerson()->getAccompanyingPeriodsOrdered();

        return end($periods) === $this;
    }

    /**
     */
    public function reOpen(): void
    {
        $this->setClosingDate(null);
        $this->setClosingMotive(null);
    }

    /**
     * Validation function
     */
    public function isDateConsistent(ExecutionContextInterface $context)
    {
        if ($this->isOpen()) {
            return;
        }

        if (! $this->isClosingAfterOpening()) {
            $context->buildViolation('The date of closing is before the date of opening')
                ->atPath('dateClosing')
                ->addViolation();
        }
    }

    /**
     * Returns true if the closing date is after the opening date.
     *
     * @return boolean
     */
    public function isClosingAfterOpening(): bool
    {
        if (null === $this->getClosingDate()) {
            return false;
        }
        $diff = $this->getOpeningDate()->diff($this->getClosingDate());

        if ($diff->invert === 0) {
            return true;
        }
        return false;
    }

    function getUser(): ?User
    {
        return $this->user;
    }

    function setUser(User $user): self
    {
        $this->user = $user;

        return $this;
    }

    public function getOrigin(): ?Origin
    {
        return $this->origin;
    }

    public function setOrigin(Origin $origin): self
    {
        $this->origin = $origin;

        return $this;
    }

    public function getRequestorPerson(): ?Person
    {
        return $this->requestorPerson;
    }

    private function setRequestorPerson(Person $requestorPerson = null): self
    {
        $this->requestorPerson = $requestorPerson;

        return $this;
    }

    public function getRequestorThirdParty(): ?ThirdParty
    {
        return $this->requestorThirdParty;
    }

    private function setRequestorThirdParty(ThirdParty $requestorThirdParty = null): self
    {
        $this->requestorThirdParty = $requestorThirdParty;

        return $this;
    }

    /**
     * @return Person|ThirdParty
     * @Groups({"read"})
     */
    public function getRequestor()
    {
        return $this->requestorPerson ?? $this->requestorThirdParty;
    }


    /**
     * Set a requestor
     *
     * The requestor is either an instance of ThirdParty, or an
     * instance of Person
     *
     * @param $requestor Person|ThirdParty
     * @return self
     * @throw UnexpectedValueException if the requestor is not a Person or ThirdParty
     * @Groups({"write"})
     */
    public function setRequestor($requestor): self
    {
        if ($requestor instanceof Person) {
            $this->setRequestorThirdParty(NULL);
            $this->setRequestorPerson($requestor);
        } elseif ($requestor instanceof ThirdParty) {
            $this->setRequestorThirdParty($requestor);
            $this->setRequestorPerson(NULL);
        } elseif (NULL === $requestor) {
            $this->setRequestorPerson(NULL);
            $this->setRequestorThirdParty(NULL);
        } else {
            throw new \UnexpectedValueException("requestor is not an instance of Person or ThirdParty");
        }

        return $this;
    }


    public function isRequestorAnonymous(): bool
    {
        return $this->requestorAnonymous;
    }

    public function setRequestorAnonymous(bool $requestorAnonymous): self
    {
        $this->requestorAnonymous = $requestorAnonymous;

        return $this;
    }

    public function isEmergency(): bool
    {
        return $this->emergency;
    }

    public function setEmergency(bool $emergency): self
    {
        $this->emergency = $emergency;

        return $this;
    }

    public function isConfidential(): bool
    {
        return $this->confidential;
    }

    public function setConfidential(bool $confidential): self
    {
        $this->confidential = $confidential;

        return $this;
    }

    public function getCreatedBy(): ?User
    {
        return $this->createdBy;
    }

    public function setCreatedBy(User $createdBy): self
    {
        $this->createdBy = $createdBy;

        return $this;
    }

    public function getStep(): ?string
    {
        return $this->step;
    }

    public function setStep(string $step): self
    {
        $this->step = $step;

        return $this;
    }

    public function getIntensity(): ?string
    {
        return $this->intensity;
    }

    public function setIntensity(string $intensity): self
    {
        $this->intensity = $intensity;

        return $this;
    }

    /**
     * @return iterable|Collection
     */
    public function getScopes(): Collection
    {
        return $this->scopes;
    }


    public function addScope(Scope $scope): self
    {
        if (!$this->scopes->contains($scope)) {
            $this->scopes[] = $scope;
        }

        return $this;
    }

    public function removeScope(Scope $scope): void
    {
        $this->scopes->removeElement($scope);
    }

    public function getResources(): Collection
    {
        return $this->resources;
    }

    public function addResource(Resource $resource): self
    {
        $resource->setAccompanyingPeriod($this);
        $this->resources[] = $resource;

        return $this;
    }

    public function removeResource(Resource $resource): void
    {
        $resource->setAccompanyingPeriod(null);
        $this->resources->removeElement($resource);
    }

    public function getSocialIssues(): Collection
    {
        return $this->socialIssues;
    }

    public function addSocialIssue(SocialIssue $socialIssue): self
    {
        if (!$this->socialIssues->contains($socialIssue)) {
            $this->socialIssues[] = $socialIssue;
        }

        return $this;
    }

    public function removeSocialIssue(SocialIssue $socialIssue): void
    {
        $this->socialIssues->removeElement($socialIssue);
    }

    /**
     * @return Collection|SocialIssues[] All social issues and their descendants
     */
    public function getRecursiveSocialIssues(): Collection
    {
        $recursiveSocialIssues = new ArrayCollection();

        foreach( $this->socialIssues as $socialIssue) {
            foreach ($socialIssue->getDescendantsWithThis() as $descendant) {
                if(! $recursiveSocialIssues->contains($descendant)) {
                    $recursiveSocialIssues->add($descendant);
                }
            }
        }
        return $recursiveSocialIssues;
    }


    /**
     * @return Collection|SocialAction[] All the descendant social actions of all
     * the descendants of the entity
     */
    public function getRecursiveSocialActions(): Collection
    {
        $recursiveSocialActions = new ArrayCollection();

        foreach( $this->socialIssues as $socialIssue) {
            foreach ($socialIssue->getRecursiveSocialActions() as $descendant) {
                if(! $recursiveSocialActions->contains($descendant)) {
                    $recursiveSocialActions->add($descendant);
                }
            }
        }

        return $recursiveSocialActions;
    }

    /**
     * Get a list of all persons which are participating to this course
     *
     * @psalm-return Collection<int, Person>
     */
    public function getPersons(): Collection
    {
        return $this
            ->participations
            ->map(
                static function(AccompanyingPeriodParticipation $participation): Person {
                    return $participation->getPerson();
                }
            );
    }

    public function setCreatedAt(\DateTimeInterface $datetime): self
    {
        $this->createdAt = $datetime;

        return $this;
    }

    public function setUpdatedBy(User $user): self
    {
        $this->updatedBy = $user;

        return $this;
    }

    public function setUpdatedAt(\DateTimeInterface $datetime): self
    {
        $this->updatedAt = $datetime;

        return $this;
    }

    /**
     * @return AccompanyingPeriodWork[]
     */
    public function getWorks(): Collection
    {
        return $this->works;
    }

    public function addWork(AccompanyingPeriodWork $work): self
    {
        $this->works[] = $work;
        $work->setAccompanyingPeriod($this);

        return $this;
    }

    public function removeWork(AccompanyingPeriodWork $work): self
    {
        $this->work->removeElement($work);
        $work->setAccompanyingPeriod(null);

        return $this;
    }

    public function getAddressLocation(): ?Address
    {
        return $this->addressLocation;
    }

    public function getCenter(): ?Center
    {
        if (count($this->getPersons()) === 0){
            return null;
        } else {
            return $this->getPersons()->first()->getCenter();
        }
    }

    /**
     * @Groups({"write"})
     */
    public function setAddressLocation(?Address $addressLocation = null): self
    {
        $this->addressLocation = $addressLocation;

        return $this;
    }

    /**
     * @Groups({"read"})
     */
    public function getPersonLocation(): ?Person
    {
        return $this->personLocation;
    }

    /**
     * Get a list of person which have an adresse available for a valid location
     *
     * @return Collection|Person[]
     */
    public function getAvailablePersonLocation(): Collection
    {
        return $this->getOPenParticipations()
            ->filter(function(AccompanyingPeriodParticipation $p) {
                return $p->getPerson()->hasCurrentHouseholdAddress();
            })
            ->map(function(AccompanyingPeriodParticipation $p) {
                return $p->getPerson();
            });
    }

    /**
     * @Groups({"write"})
     */
    public function setPersonLocation(?Person $person = null): self
    {
        $this->personLocation = $person;

        return $this;
    }

    /**
     * Get the location, taking precedence into account
     *
     * @Groups({"read"})
     */
    public function getLocation(\DateTimeImmutable $at = null): ?Address
    {
        if ($this->getPersonLocation() instanceof Person) {
           return $this->getPersonLocation()->getCurrentHouseholdAddress($at);
        }

        return $this->getAddressLocation();
    }

    /**
     * Get where the location is
     *
     * @Groups({"read"})
     */
    public function getLocationStatus(): string
    {
        if ($this->getPersonLocation() instanceof Person) {
            return 'person';
        } elseif ($this->getAddressLocation() instanceof Address) {
            return 'address';
        } else {
            return 'none';
        }
    }

    public function getCenters(): ?iterable
    {
        foreach ($this->getPersons() as $person) {
            if (!in_array($person->getCenter(), $centers ?? [])
                && NULL !== $person->getCenter()) {
                $centers[] = $person->getCenter();
            }
        }

        return $centers ?? null;
    }
}