<?php

namespace Drupal\ggroup\Form;

use Drupal\group\Entity\Form\GroupRelationshipForm;
use Drupal\Core\Url;
use Drupal\Core\Form\FormStateInterface;

/**
 * Provides a form creating a subgroup.
 */
class SubgroupFormStep2 extends GroupRelationshipForm {

  /**
   * {@inheritdoc}
   */
  public function form(array $form, FormStateInterface $form_state) {
    $form = parent::form($form, $form_state);
    $form['entity_id']['#access'] = FALSE;
    return $form;
  }

  /**
   * {@inheritdoc}
   */
  protected function actions(array $form, FormStateInterface $form_state) {
    $actions = parent::actions($form, $form_state);

    $actions['submit']['#value'] = $this->t('Create subgroup');
    $actions['back'] = [
      '#type' => 'submit',
      '#value' => $this->t('Back'),
      '#submit' => [
        '::submitForm',
        '::back',
      ],
      '#limit_validation_errors' => [],
    ];

    return $actions;
  }

  /**
   * {@inheritdoc}
   */
  public function save(array $form, FormStateInterface $form_state) {
    $storage_id = $form_state->get('storage_id');
    $store = $this->privateTempStoreFactory->get('ggroup_add_temp');

    // We can now safely save the group and set its ID on the group content.
    $group = $store->get("$storage_id:group");
    $group->save();
    $this->entity->set('entity_id', $group->id());

    // We also clear the private store, so we can start fresh next time around.
    $store->delete("$storage_id:step");
    $store->delete("$storage_id:group");

    return parent::save($form, $form_state);
  }

  /**
   * Goes back to step 1 of subgroup creation.
   *
   * @param array $form
   *   An associative array containing the structure of the form.
   * @param \Drupal\Core\Form\FormStateInterface $form_state
   *   The current state of the form.
   *
   * @see \Drupal\ggroup\Controller\SubgroupWizardController::add()
   * @see \Drupal\ggroup\Form\SubgroupFormStep1
   */
  public function back(array &$form, FormStateInterface $form_state) {
    $storage_id = $form_state->get('storage_id');
    $store = $this->privateTempStoreFactory->get('ggroup_add_temp');
    $store->set("$storage_id:step", 1);

    // Disable any URL-based redirect when going back to the previous step.
    $request = $this->getRequest();
    $form_state->setRedirectUrl(Url::fromRoute('<current>', [], ['query' => $request->query->all()]));
    $request->query->remove('destination');
  }

}
