<?php

namespace Drupal\devel\Form;

use Drupal\Component\Utility\Html;
use Drupal\Core\Form\FormBase;
use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\Url;

/**
 * Form that displays all the config variables to edit them.
 */
class ConfigsList extends FormBase {

  /**
   * {@inheritdoc}
   */
  public function getFormId() {
    return 'devel_config_system_form';
  }

  /**
   * {@inheritdoc}
   */
  public function buildForm(array $form, FormStateInterface $form_state, $filter = '') {
    $form['filter'] = array(
      '#type' => 'details',
      '#title' => t('Filter variables'),
      '#attributes' => array('class' => array('container-inline')),
      '#open' => isset($filter) && trim($filter) != '',
    );
    $form['filter']['name'] = array(
      '#type' => 'textfield',
      '#title' => $this->t('Variable name'),
      '#title_display' => 'invisible',
      '#default_value' => $filter,
    );
    $form['filter']['show'] = array(
      '#type' => 'submit',
      '#value' => $this->t('Filter'),
    );

    $header = array(
      'name' => array('data' => $this->t('Name')),
      'edit' => array('data' => $this->t('Operations')),
    );

    $rows = array();

    $destination = $this->getDestinationArray();

    // List all the variables filtered if any filter was provided.
    $names = $this->configFactory()->listAll($filter);

    foreach ($names as $config_name) {
      $operations['edit'] = array(
        'title' => $this->t('Edit'),
        'url' => Url::fromRoute('devel.config_edit', array('config_name' => $config_name)),
        'query' => $destination
      );
      $rows[] = array(
        'name' => $config_name,
        'operation' => array('data' => array('#type' => 'operations', '#links' => $operations)),
      );
    }

    $form['variables'] = array(
      '#type' => 'table',
      '#header' => $header,
      '#rows' => $rows,
      '#empty' => $this->t('No variables found')
    );

    return $form;
  }

  /**
   * {@inheritdoc}
   */
  public function submitForm(array &$form, FormStateInterface $form_state) {
    $filter = $form_state->getValue('name');
    $form_state->setRedirectUrl(Url::FromRoute('devel.configs_list', array('filter' => Html::escape($filter))));
  }

}