<?php
/*
 *
 * Copyright (C) 2018, Champs Libres Cooperative SCRLFS, <http://www.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\Search;

use Chill\PersonBundle\Entity\PersonNotDuplicate;
use Doctrine\ORM\EntityManagerInterface;
use Chill\PersonBundle\Entity\Person;
use Chill\MainBundle\Security\Authorization\AuthorizationHelper;
use Chill\PersonBundle\Repository\PersonNotDuplicateRepository;
use Symfony\Component\Security\Core\Authentication\Token\Storage\TokenStorageInterface;
use Symfony\Component\Security\Core\Role\Role;
use Chill\PersonBundle\Security\Authorization\PersonVoter;

/**
 *
 *
 * @author Julien Fastré <julien.fastre@champs-libres.coop>
 */
class SimilarPersonMatcher
{
    CONST SIMILAR_SEARCH_ORDER_BY_ALPHABETICAL = 'alphabetical';

    CONST SIMILAR_SEARCH_ORDER_BY_SIMILARITY = 'similarity';

    /**
     * @var EntityManagerInterface
     */
    protected $em;

    /**
     * @var AuthorizationHelper
     */
    protected $authorizationHelper;

    /**
     * @var TokenStorageInterface
     */
    protected $tokenStorage;

    public function __construct(
        EntityManagerInterface $em,
        AuthorizationHelper $authorizationHelper,
        TokenStorageInterface $tokenStorage
    ) {
        $this->em = $em;
        $this->authorizationHelper = $authorizationHelper;
        $this->tokenStorage = $tokenStorage;
    }

    public function matchPerson(Person $person, PersonNotDuplicateRepository $personNotDuplicateRepository, $precision = 0.15, $orderBy = self::SIMILAR_SEARCH_ORDER_BY_SIMILARITY)
    {
        $centers = $this->authorizationHelper->getReachableCenters(
            $this->tokenStorage->getToken()->getUser(),
            new Role(PersonVoter::SEE)
        );

        $dql = 'SELECT p from ChillPersonBundle:Person p '
            . ' WHERE ('
            . '   SIMILARITY(p.fullnameCanonical, UNACCENT(LOWER(:fullName))) >= :precision '
            . ' ) '
            . ' AND p.center IN (:centers)'
            . ' AND p.id != :personId '
        ;

        $notDuplicatePersons = $personNotDuplicateRepository->findNotDuplicatePerson($person);

        if (count($notDuplicatePersons)) {
            $dql .= ' AND p.id not in (:notDuplicatePersons)';
        }

        switch ($orderBy) {
            case self::SIMILAR_SEARCH_ORDER_BY_ALPHABETICAL:
                $dql .= ' ORDER BY p.fullnameCanonical ASC ';
                break;
            case self::SIMILAR_SEARCH_ORDER_BY_SIMILARITY:
            default :
                $dql .= ' ORDER BY SIMILARITY(p.fullnameCanonical, UNACCENT(LOWER(:fullName))) DESC ';
        }

        $query = $this->em
            ->createQuery($dql)
            ->setParameter('fullName', $person->getFirstName() . ' ' . $person->getLastName())
            ->setParameter('centers', $centers)
            ->setParameter('personId', $person->getId())
            ->setParameter('precision', $precision)
        ;

        if (count($notDuplicatePersons)) {
            $query->setParameter('notDuplicatePersons', $notDuplicatePersons);
        }

        return $query->getResult();
    }
}