<?php

/*
 * Copyright (C) 2017 Champs-Libres <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\Export\Aggregator;

use Chill\MainBundle\Export\AggregatorInterface;
use Doctrine\ORM\QueryBuilder;
use Symfony\Component\Form\Extension\Core\Type\DateType;
use Chill\MainBundle\Export\ExportElementValidatedInterface;
use Symfony\Component\Validator\Context\ExecutionContextInterface;
use Symfony\Component\Translation\TranslatorInterface;

/**
 * 
 *
 * @author Julien Fastré <julien.fastre@champs-libres.coop>
 */
class AgeAggregator implements AggregatorInterface,
    ExportElementValidatedInterface
{
    /**
     *
     * @var 
     */
    protected $translator;
    
    public function __construct($translator)
    {
        $this->translator = $translator;
    }

    
    public function addRole()
    {
        return null;
    }

    public function alterQuery(QueryBuilder $qb, $data)
    {
        $qb->addSelect('DATE_DIFF(:date_age_calculation, person.birthdate)/365 as person_age');
        $qb->setParameter('date_age_calculation', $data['date_age_calculation']);
        $qb->addGroupBy('person_age');
    }

    public function applyOn()
    {
        return 'person';
    }

    public function buildForm(\Symfony\Component\Form\FormBuilderInterface $builder)
    {
        $builder->add('date_age_calculation', DateType::class, array(
            'label' => "Calculate age in relation to this date",
            'data'  => new \DateTime(),
            'attr'  => array('class' => 'datepicker'),
            'widget'=> 'single_text',
            'format' => 'dd-MM-yyyy'
        ));
    }
    
    public function validateForm($data, ExecutionContextInterface $context)
    {
        if ($data['date_age_calculation'] === null) {
            $context->buildViolation("The date should not be empty")
                ->addViolation();
        }
    }

    public function getLabels($key, array $values, $data)
    {
        return function($value) {
            if ($value === '_header') {
                return "Age";
            }
            
            if ($value === NULL) {
                return $this->translator->trans("without data");
            }
            
            return $value;
        };
    }

    public function getQueryKeys($data)
    {
        return array(
            'person_age'
        );
    }

    public function getTitle()
    {
        return "Aggregate by age";
    }

}