<?php

namespace Drupal\eca_endpoint\Plugin\Action;

use Drupal\Core\Action\Attribute\Action;
use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\StringTranslation\TranslatableMarkup;
use Drupal\eca\Attribute\EcaAction;

/**
 * Get a request header.
 */
#[Action(
  id: 'eca_endpoint_get_request_header',
  label: new TranslatableMarkup('Request: Get header'),
)]
#[EcaAction(
  version_introduced: '1.1.0',
)]
class GetRequestHeader extends RequestActionBase {

  /**
   * {@inheritdoc}
   */
  protected function getRequestValue(): mixed {
    $headers = $this->getRequest()->headers->all();
    $name = trim((string) $this->tokenService->replaceClear($this->configuration['name']));
    if ($name === '') {
      return $headers;
    }
    $header = $headers[$name] ?? NULL;
    if (is_array($header) && count($header) === 1) {
      $header = reset($header);
    }
    return $header;
  }

  /**
   * {@inheritdoc}
   */
  public function defaultConfiguration(): array {
    return [
      'name' => '',
    ] + parent::defaultConfiguration();
  }

  /**
   * {@inheritdoc}
   */
  public function buildConfigurationForm(array $form, FormStateInterface $form_state): array {
    $form['name'] = [
      '#type' => 'textfield',
      '#title' => $this->t('Header name'),
      '#description' => $this->t('The name / key of the request header. Example: <em>Content-Type</em>. When this field is empty, then all headers will be returned as a list, keyed by header name.'),
      '#default_value' => $this->configuration['name'],
      '#weight' => -20,
      '#required' => FALSE,
      '#eca_token_replacement' => TRUE,
    ];
    return parent::buildConfigurationForm($form, $form_state);
  }

  /**
   * {@inheritdoc}
   */
  public function submitConfigurationForm(array &$form, FormStateInterface $form_state): void {
    $this->configuration['name'] = (string) $form_state->getValue('name');
    parent::submitConfigurationForm($form, $form_state);
  }

}
