<?php
declare(strict_types=1);

namespace App\Filter\DoctrineFilter;

use App\Annotation\DateTimeConstraintAware;
use App\Service\Constraint\DateTimeConstraint;
use App\Service\Utils\StringsUtils;
use App\Tests\Filter\DoctrineFilter\DateTimeFilterTest;
use Doctrine\ORM\Mapping\ClassMetadata;
use Doctrine\ORM\Query\Filter\SQLFilter;

/**
 * Classe AbstractTimeFilterUtils fournie des méthodes pour construire les requetes de contrainte de temps
 */
abstract class AbstractTimeFilter extends SQLFilter
{
    /**
     * Fonction permettant de construire la requête SQL correspondante aux contraintes
     * @param array $constraints
     * @param string $targetTableAlias
     * @param array $fields
     * @return string
     */
    protected function constructQuery(array $constraints, string $targetTableAlias, array $fields): string{
        $queryConditionsAND = [];
        foreach ($constraints as $key => $constraint) {
            $queryConditionsOR = [];
            foreach ($constraint as $date => $conditions){
                foreach ($conditions as $condition){
                    $arithmetic = $this->getArithmeticValue($condition);
                    if(!is_null($arithmetic))
                        $queryConditionsOR[] = sprintf("%s.%s %s '%s'", $targetTableAlias, $fields[$key], $arithmetic, $date);
                    else
                        $queryConditionsOR[] = sprintf("%s.%s IS NULL", $targetTableAlias, $fields[$key]);
                }
            }
            if(!empty($queryConditionsOR))
                $queryConditionsAND[] = sprintf("(%s)", join(' OR ', $queryConditionsOR));
        }

        return implode(" AND ", $queryConditionsAND);
    }

    /**
     * Fonction retournant la valeur arithmétique correspondant à la condition de la contrainte
     * @param $condition
     * @return string|null
     * @see DateTimeFilterTest::testGetArithmeticValue()
     */
    protected function getArithmeticValue($condition): string|null{
        switch ($condition){
            case DateTimeConstraint::INF : return '<';
            case DateTimeConstraint::EQUAL :  return '=';
            case DateTimeConstraint::SUP :  return '>';
            case DateTimeConstraint::INF + DateTimeConstraint::EQUAL : return '<=';
            case DateTimeConstraint::SUP + DateTimeConstraint::EQUAL  : return '>=';
        }
        return null;
    }
}