<?php

namespace Drupal\node_revision_delete\Plugin\NodeRevisionDelete;

use Drupal\Component\Datetime\TimeInterface;
use Drupal\Core\Entity\Query\QueryInterface;
use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\StringTranslation\TranslatableMarkup;
use Drupal\node\NodeInterface;
use Drupal\node_revision_delete\Attribute\NodeRevisionDelete;
use Drupal\node_revision_delete\Plugin\NodeRevisionDeleteBase;
use Drupal\node_revision_delete\Plugin\NodeRevisionDeleteQueryInterface;
use Drupal\node_revision_delete\Plugin\NodeRevisionDeleteTimeBasedInterface;
use Symfony\Component\DependencyInjection\ContainerInterface;

/**
 * Deletes unpublished revisions older than the active revision as specified.
 */
#[NodeRevisionDelete(
  id: 'only_drafts',
  label: new TranslatableMarkup('Delete unpublished revisions older than the active revision as specified.'),
)]
class OnlyDrafts extends NodeRevisionDeleteBase implements NodeRevisionDeleteQueryInterface, NodeRevisionDeleteTimeBasedInterface {

  /**
   * The time service.
   */
  protected TimeInterface $time;

  /**
   * {@inheritdoc}
   */
  public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
    $plugin = new static(
      $configuration,
      $plugin_id,
      $plugin_definition,
      $container->get('entity_type.manager'),
    );
    $plugin->time = $container->get('datetime.time');
    return $plugin;
  }

  /**
   * {@inheritdoc}
   */
  public function getRevisionsToDelete(QueryInterface $query, int $active_vid, NodeInterface $node): array {
    $age = strtotime('-' . $this->configuration['age'] . ' months', $this->time->getCurrentTime());

    return $this->getVidsFromQuery($query
      ->condition('status', 0)
      ->condition('vid', $active_vid, '<')
      ->condition('changed', $age, '<'));
  }

  /**
   * {@inheritdoc}
   */
  public function getRevisionsToProtect(QueryInterface $query, int $active_vid, NodeInterface $node): array {
    $age = strtotime('-' . $this->configuration['age'] . ' months', $this->time->getCurrentTime());

    return $this->getVidsFromQuery($query
      ->condition('status', 0)
      ->condition('vid', $active_vid, '<')
      ->condition('changed', $age, '>='));
  }

  /**
   * {@inheritdoc}
   */
  public function getDelay(NodeInterface $revision): int {
    $changed = $revision->getChangedTime();
    $age = strtotime('+' . $this->configuration['age'] . ' months', $changed);
    return max(0, $age - $this->time->getCurrentTime());
  }

  /**
   * {@inheritdoc}
   *
   * @deprecated in node_revision_delete:2.1.0 and is removed from
   *   node_revision_delete:3.0.0. Use getRevisionsToDelete() and
   *   getRevisionsToProtect() instead.
   *
   * @see https://www.drupal.org/node/3581259
   */
  public function checkRevisions(array $revision_ids, int $active_vid): array {
    @trigger_error(__METHOD__ . '() is deprecated in node_revision_delete:2.1.0 and is removed from node_revision_delete:3.0.0. Use getRevisionsToDelete() and getRevisionsToProtect() instead. See https://www.drupal.org/node/3581259', E_USER_DEPRECATED);
    $revision_statuses = [];

    $age = strtotime('-' . $this->configuration['age'] . ' months', $this->time->getCurrentTime());

    foreach ($revision_ids as $vid) {
      $revision_id = $vid;
      // We are only interested in draft revisions older that the active
      // revision.
      $can_delete = NULL;
      if ($revision_id < $active_vid) {
        /** @var \Drupal\node\NodeInterface $revision */
        $revision = $this->entityTypeManager->getStorage('node')->loadRevision($revision_id);
        if (!$revision->isPublished()) {
          // The timestamp of the created revision is stored in the changed
          // field.
          $can_delete = $revision->getChangedTime() < $age;
        }
      }

      $revision_statuses[$revision_id] = $can_delete;
    }

    return $revision_statuses;
  }

  /**
   * {@inheritdoc}
   */
  public function buildConfigurationForm(array $form, FormStateInterface $form_state): array {
    for ($i = 1; $i <= 24; $i++) {
      $options[$i] = $this->formatPlural($i, '@count month', '@count months');
    }
    $form['age'] = [
      '#type' => 'select',
      '#title' => $this->t('The minimum amount of months an unpublished revision older than than active revision must be kept for'),
      '#description' => $this->t('After this time, unpublished revisions older than the active revision can be deleted. The minimum age of revisions is always respected, regardless of other settings.'),
      '#options' => $options,
      '#empty_value' => 0,
      '#empty_option' => '0 ' . $this->t('months'),
      '#default_value' => $this->configuration['age'] ?? 0,
    ];
    return $form;
  }

}