<?php

namespace App\Doctrine;

use Doctrine\ORM\Mapping\ClassMetadata;
use Doctrine\ORM\Query\Filter\SQLFilter;

class DepartmentFilter extends SQLFilter
{
    private string $column = 'department_id';

    public function addFilterConstraint(ClassMetadata $targetEntity, $targetTableAlias): string
    {

        if (!$this->checkEntityValid($targetEntity->getReflectionClass()->name)) {
            return '';
        }

        if ($this->hasParameter('department_id')) {
            return sprintf('%s.%s = %s', $targetTableAlias, $this->column, $this->getParameter('department_id'));
        }

        if ($this->hasParameter('academic_unit_id')) {
//            return sprintf('%s.academic_unit_id = %s', $this->alias,  $this->getParameter('academic_unit_id'));
            return '(
                    SELECT d.id FROM department d
                    WHERE d.id = ' . $targetTableAlias . '.' . $this->column . '
                    AND d.academic_unit_id = ' . $this->getParameter('academic_unit_id') . '
                ) IS NOT NULL
            ';
        }

        return '';
    }

    private function checkEntityValid($targetEntity)
    {
        switch ($targetEntity) {
            case 'App\Entity\Department':
                $this->column = 'id';

                return true;
        }

        return false;
    }
}