<?php

namespace App\Form;

use App\Entity\Department;
use App\Entity\Commune;
use Symfony\Bridge\Doctrine\Form\Type\EntityType;
use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormEvents;
use Symfony\Component\Form\FormEvent;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\Form\FormInterface;
use Symfony\Component\OptionsResolver\OptionsResolver;

class CommuneSelType extends AbstractType
{
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
            ->add('department', EntityType::class, [
                'label' => 'basics.department',
                'class' => Department::class,
                'placeholder' => 'basics.department.placeholder',
                'attr' => [
                    'onchange' => 'this.form.submit()'
                ],
                'mapped' => false,
                'required' => false,
            ])
        ;

        $builder->get('department')->addEventListener(
            FormEvents::POST_SUBMIT,
            function (FormEvent $event) use($options) {
                $form = $event->getForm();
                $this->addCommuneField($form->getParent(), $form->getData(), $options);
            }
        );

        $builder->addEventListener(
            FormEvents::POST_SET_DATA,
            function (FormEvent $event) use($options) {
                $form = $event->getForm();
                $this->addCommuneField($form, null, $options);
            }
        );
    }

    private function addCommuneField(FormInterface $form, ?Department $department, array $options)
    {
        $form->add('commune', EntityType::class, [
            'label' => 'basics.commune',
            'class' => Commune::class,
            'placeholder' => 'basics.commune.placeholder',
            'attr' => [
                'onchange' => 'this.form.submit()'
            ],
            'mapped' => false,
            'required' => false,
            'choices' => $department ? $department->getCommunes() : []
        ]);
    }

    public function configureOptions(OptionsResolver $resolver)
    {
        $resolver->setDefaults(array(
        ));
    }
}