<?php

namespace Drupal\dxpr_builder\Controller;

use Drupal\acquia_dam\Entity\ComputedEmbedCodesField;
use Drupal\Component\Utility\UrlHelper;
use Drupal\Core\Access\CsrfTokenGenerator;
use Drupal\Core\Ajax\AjaxResponse;
use Drupal\Core\Asset\AssetCollectionRendererInterface;
use Drupal\Core\Asset\AssetResolverInterface;
use Drupal\Core\Asset\AttachedAssets;
use Drupal\Core\Controller\ControllerBase;
use Drupal\Core\Database\Connection;
use Drupal\Core\Entity\ContentEntityInterface;
use Drupal\Core\Entity\EntityFieldManagerInterface;
use Drupal\Core\Entity\EntityTypeBundleInfoInterface;
use Drupal\Core\Entity\EntityTypeManagerInterface;
use Drupal\Core\Entity\RevisionLogInterface;
use Drupal\Core\Extension\ModuleExtensionList;
use Drupal\Core\Extension\ModuleHandlerInterface;
use Drupal\Core\File\FileUrlGeneratorInterface;
use Drupal\Core\Language\LanguageManagerInterface;
use Drupal\Core\Render\Element;
use Drupal\Core\Render\HtmlResponse;
use Drupal\Core\Render\RendererInterface;
use Drupal\Core\Session\AccountProxyInterface;
use Drupal\Core\State\StateInterface;
use Drupal\Core\Url;
use Drupal\dxpr_builder\Entity\DxprBuilderUserTemplate;
use Drupal\dxpr_builder\Service\ContentLock;
use Drupal\dxpr_builder\Service\DxprBuilderLicenseServiceInterface;
use Drupal\dxpr_builder\Service\DxprBuilderServiceInterface;
use Drupal\dxpr_builder\Service\TemplateImageValidatorInterface;
use Drupal\file\FileInterface;
use Drupal\layout_builder\SectionComponent;
use Drupal\media\Entity\MediaType;
use Drupal\media\MediaInterface;
use Drupal\media_library\MediaLibraryState;
use Drupal\media_library\MediaLibraryUiBuilder;
use Drupal\views\Views;
use GuzzleHttp\ClientInterface;
use GuzzleHttp\Exception\GuzzleException;
use Symfony\Component\DependencyInjection\ContainerInterface;
use Symfony\Component\HttpFoundation\JsonResponse;
use Symfony\Component\HttpFoundation\RequestStack;
use Symfony\Component\HttpFoundation\Response;

/**
 * Description.
 */
class AjaxController extends ControllerBase implements AjaxControllerInterface {

  use ImagesHandlerTrait;

  /**
   * The current user.
   *
   * @var \Drupal\Core\Session\AccountProxyInterface
   */
  protected $currentUser;

  /**
   * The module handler service.
   *
   * @var \Drupal\Core\Extension\ModuleHandlerInterface
   */
  protected $moduleHandler;

  /**
   * The list of available modules.
   *
   * @var \Drupal\Core\Extension\ModuleExtensionList
   */
  protected $extensionListModule;

  /**
   * The database connection.
   *
   * @var \Drupal\Core\Database\Connection
   */
  protected $database;

  /**
   * The request stack.
   *
   * @var \Symfony\Component\HttpFoundation\RequestStack
   */
  protected $requestStack;

  /**
   * The entity type manager service.
   *
   * @var \Drupal\Core\Entity\EntityTypeManagerInterface
   */
  protected $entityTypeManager;

  /**
   * The entity field manager service.
   *
   * @var \Drupal\Core\Entity\EntityFieldManagerInterface
   */
  protected $entityFieldManager;

  /**
   * The asset resolver service.
   *
   * @var \Drupal\Core\Asset\AssetResolverInterface
   */
  protected $assetResolver;

  /**
   * The CSS asset collection renderer.
   *
   * @var \Drupal\Core\Asset\AssetCollectionRendererInterface
   */
  protected $cssAssetCollectionRenderer;

  /**
   * The JS asset collection renderer.
   *
   * @var \Drupal\Core\Asset\AssetCollectionRendererInterface
   */
  protected $jsAssetCollectionRenderer;

  /**
   * The entity type bundle info manager.
   *
   * @var \Drupal\Core\Entity\EntityTypeBundleInfoInterface
   */
  protected $entityTypeBundleInfoManager;

  /**
   * The dxpr builder service.
   *
   * @var \Drupal\dxpr_builder\Service\DxprBuilderServiceInterface
   */
  protected $dxprBuilderService;

  /**
   * The dxpr license service.
   *
   * @var \Drupal\dxpr_builder\Service\DxprBuilderLicenseServiceInterface
   */
  protected $dxprLicenseService;

  /**
   * The CSRF token generator service.
   *
   * @var \Drupal\Core\Access\CsrfTokenGenerator
   */
  protected $csrfToken;

  /**
   * The language manager service.
   *
   * @var \Drupal\Core\Language\LanguageManagerInterface
   */
  protected $languageManager;

  /**
   * The state service.
   *
   * @var \Drupal\Core\State\StateInterface
   */
  private $state;

  /**
   * The renderer service.
   *
   * @var \Drupal\Core\Render\RendererInterface
   */
  protected $renderer;

  /**
   * The content lock service.
   *
   * @var \Drupal\dxpr_builder\Service\ContentLock
   */
  private $contentLock;

  /**
   * The file URL generator.
   *
   * @var \Drupal\Core\File\FileUrlGeneratorInterface
   */
  protected $fileUrlGenerator;

  /**
   * The HTTP client to fetch the feed data with.
   *
   * @var \GuzzleHttp\ClientInterface
   */
  protected $httpClient;

  /**
   * The Inline block usage service.
   *
   * @var object|null
   */
  protected $inlineBlockUsage;

  /**
   * The medial library builder.
   *
   * @var \Drupal\media_library\MediaLibraryUiBuilder|null
   */
  private ?MediaLibraryUiBuilder $medialLibraryBuilder;

  /**
   * The template image validator service.
   *
   * @var \Drupal\dxpr_builder\Service\TemplateImageValidatorInterface
   */
  protected $templateImageValidator;

  /**
   * Construct an AjaxController object.
   *
   * @param \Drupal\Core\Session\AccountProxyInterface $currentUser
   *   The current user.
   * @param \Drupal\Core\Extension\ModuleHandlerInterface $moduleHandler
   *   The module handler service.
   * @param \Drupal\Core\Extension\ModuleExtensionList $extensionListModule
   *   The module listing service.
   * @param \Drupal\Core\Database\Connection $database
   *   The database connection.
   * @param \Symfony\Component\HttpFoundation\RequestStack $requestStack
   *   The request stack.
   * @param \Drupal\Core\Entity\EntityTypeManagerInterface $entityTypeManager
   *   The entity type manager service.
   * @param \Drupal\Core\Entity\EntityFieldManagerInterface $entityFieldManager
   *   The entity field manager service.
   * @param \Drupal\Core\Asset\AssetResolverInterface $assetResolver
   *   The asset resolver service.
   * @param \Drupal\Core\Asset\AssetCollectionRendererInterface $cssAssetCollectionRenderer
   *   The CSS asset collection renderer.
   * @param \Drupal\Core\Asset\AssetCollectionRendererInterface $jsAssetCollectionRenderer
   *   The JS asset collection renderer.
   * @param \Drupal\Core\Entity\EntityTypeBundleInfoInterface $entityTypeBundleInfoManager
   *   The entity type bundle info manager.
   * @param \Drupal\dxpr_builder\Service\DxprBuilderServiceInterface $dxprBuilderService
   *   The dxpr builder service.
   * @param \Drupal\dxpr_builder\Service\DxprBuilderLicenseServiceInterface $dxprLicenseService
   *   The dxpr license service.
   * @param \Drupal\Core\Access\CsrfTokenGenerator $csrfToken
   *   The CSRF token generator service.
   * @param \Drupal\Core\Language\LanguageManagerInterface $languageManager
   *   The language manager service.
   * @param \Drupal\Core\State\StateInterface $state
   *   The state service.
   * @param \Drupal\Core\Render\RendererInterface $renderer
   *   The renderer service.
   * @param \Drupal\dxpr_builder\Service\ContentLock $contentLock
   *   The content lock service.
   * @param \Drupal\Core\File\FileUrlGeneratorInterface $fileUrlGenerator
   *   The file URL generator.
   * @param \GuzzleHttp\ClientInterface $http_client
   *   The HTTP client.
   * @param object|null $inlineBlockUsage
   *   The HTTP client.
   * @param \Drupal\media_library\MediaLibraryUiBuilder|null $medialLibraryBuilder
   *   The medial builder service.
   * @param \Drupal\dxpr_builder\Service\TemplateImageValidatorInterface $templateImageValidator
   *   The template image validator service.
   */
  final public function __construct(
    AccountProxyInterface $currentUser,
    ModuleHandlerInterface $moduleHandler,
    ModuleExtensionList $extensionListModule,
    Connection $database,
    RequestStack $requestStack,
    EntityTypeManagerInterface $entityTypeManager,
    EntityFieldManagerInterface $entityFieldManager,
    AssetResolverInterface $assetResolver,
    AssetCollectionRendererInterface $cssAssetCollectionRenderer,
    AssetCollectionRendererInterface $jsAssetCollectionRenderer,
    EntityTypeBundleInfoInterface $entityTypeBundleInfoManager,
    DxprBuilderServiceInterface $dxprBuilderService,
    DxprBuilderLicenseServiceInterface $dxprLicenseService,
    CsrfTokenGenerator $csrfToken,
    LanguageManagerInterface $languageManager,
    StateInterface $state,
    RendererInterface $renderer,
    ContentLock $contentLock,
    FileUrlGeneratorInterface $fileUrlGenerator,
    ClientInterface $http_client,
    object|null $inlineBlockUsage,
    MediaLibraryUiBuilder|null $medialLibraryBuilder = NULL,
    ?TemplateImageValidatorInterface $templateImageValidator = NULL,
  ) {
    $this->currentUser = $currentUser;
    $this->moduleHandler = $moduleHandler;
    $this->extensionListModule = $extensionListModule;
    $this->database = $database;
    $this->requestStack = $requestStack;
    $this->entityTypeManager = $entityTypeManager;
    $this->entityFieldManager = $entityFieldManager;
    $this->assetResolver = $assetResolver;
    $this->cssAssetCollectionRenderer = $cssAssetCollectionRenderer;
    $this->jsAssetCollectionRenderer = $jsAssetCollectionRenderer;
    $this->entityTypeBundleInfoManager = $entityTypeBundleInfoManager;
    $this->dxprBuilderService = $dxprBuilderService;
    $this->dxprLicenseService = $dxprLicenseService;
    $this->csrfToken = $csrfToken;
    $this->languageManager = $languageManager;
    $this->state = $state;
    $this->renderer = $renderer;
    $this->contentLock = $contentLock;
    $this->fileUrlGenerator = $fileUrlGenerator;
    $this->httpClient = $http_client;
    $this->inlineBlockUsage = $inlineBlockUsage;
    $this->medialLibraryBuilder = $medialLibraryBuilder;
    $this->templateImageValidator = $templateImageValidator;
  }

  /**
   * {@inheritdoc}
   *
   * @phpstan-return mixed
   */
  public static function create(ContainerInterface $container) {
    $module_handler = $container->get('module_handler');
    $inlineBlockUsage = NULL;
    if ($module_handler->moduleExists('layout_builder')) {
      $inlineBlockUsage = $container->get('inline_block.usage');
    }
    // Media Library builder service.
    if ($module_handler->moduleExists('media_library')) {
      $mediaLibraryBuilder = $container->get('media_library.ui_builder');
    }

    return new static(
      $container->get('current_user'),
      $module_handler,
      $container->get('extension.list.module'),
      $container->get('database'),
      $container->get('request_stack'),
      $container->get('entity_type.manager'),
      $container->get('entity_field.manager'),
      $container->get('asset.resolver'),
      $container->get('asset.css.collection_renderer'),
      $container->get('asset.js.collection_renderer'),
      $container->get('entity_type.bundle.info'),
      $container->get('dxpr_builder.service'),
      $container->get('dxpr_builder.license_service'),
      $container->get('csrf_token'),
      $container->get('language_manager'),
      $container->get('state'),
      $container->get('renderer'),
      $container->get('dxpr_builder.content_lock'),
      $container->get('file_url_generator'),
      $container->get('http_client'),
      $inlineBlockUsage,
      $mediaLibraryBuilder ?? NULL,
      $container->get('dxpr_builder.template_image_validator'),
    );
  }

  /**
   * {@inheritdoc}
   */
  public function ajaxRefresh(): JsonResponse {
    $url = Url::fromRoute('dxpr_builder.ajax_callback');

    // Check if request related to enterprise.
    $enterprise = FALSE;
    $enterprise_installed = $this->requestStack->getCurrentRequest()->query->get('enterprise');
    if (isset($enterprise_installed) && $enterprise_installed == 'true') {
      $enterprise = TRUE;
    }
    if ($enterprise && $this->moduleHandler->moduleExists('dxpr_builder_e')) {
      $url = Url::fromRoute('dxpr_builder_e.ajax_callback');
    }
    elseif ($enterprise && !$this->moduleHandler->moduleExists('dxpr_builder_e')) {
      throw new \Exception("The DXPR Builder Enterprise module doesn't exist or disabled.");
    }

    $token = $this->csrfToken->get($url->getInternalPath());
    $url->setOptions(['query' => ['token' => $token]]);

    return new JsonResponse($url->toString());
  }

  /**
   * {@inheritdoc}
   */
  public function ajaxCallback(): Response {
    $post_action = $this->requestStack->getCurrentRequest()->request->get('action');
    $action = $post_action ? $post_action : FALSE;
    $response = new AjaxResponse('');
    $html = '';

    switch ($action) {
      // Determine if the current user has access to DXPR Builder.
      case 'dxpr_login':
        $response = $this->hasEditAccess();

        break;

      // Determine if the current user has access to DXPR Builder.
      case 'dxpr_builder_csrf':
        if ($this->dxprLicenseService->isBillableUser()) {
          $url = Url::fromRoute('dxpr_builder.ajax_callback');
          $token = $this->csrfToken->get($url->getInternalPath());
          $url->setOptions([
            'query' => ['token' => $token],
          ]
          );
          $response = new JsonResponse($url->toString());
        }

        break;

      // Get a list of dxpr builder container types.
      case 'dxpr_get_container_types':
        if ($this->dxprLicenseService->isBillableUser()) {
          $response = $this->getContainerTypes();
        }

        break;

      // Get a list of dxpr builder container names.
      case 'dxpr_get_container_names':
        $container_type = $this->requestStack->getCurrentRequest()->request->get('container_type');
        if ($this->dxprLicenseService->isBillableUser() && !empty($container_type)) {
          $type = explode('|', $container_type);
          $entity_type = $type[0];
          $bundle = $type[1];

          $response = $this->getContainerNames($entity_type, $bundle);
        }
        else {
          $response = new JsonResponse('');
        }

        break;

      // Save a dxpr builder container.
      case 'dxpr_save_container':
        if ($this->dxprLicenseService->isBillableUser()) {
          $type = explode('|', $this->requestStack->getCurrentRequest()->request->get('type'));
          $entity_type = $type[0];
          $bundle = $type[1];
          $name = explode('|', $this->requestStack->getCurrentRequest()->request->get('name'));
          if (count($name) > 2 && is_numeric($name[1])) {
            $entity_id = $name[0];
            $revision_id = $name[1];
            $field_name = $name[2];
          }
          else {
            $entity_id = $name[0];
            $field_name = $name[1];
            $revision_id = NULL;
          }
          $encoded_html = $this->requestStack->getCurrentRequest()->request->get('htmlContent');
          $langcode = $this->requestStack->getCurrentRequest()->request->get('lang');
          if (!$langcode) {
            $langcode = $this->languageManager->getDefaultLanguage()->getId();
          }

          $response = $this->saveContainer($entity_type, $bundle, $entity_id, $revision_id, $field_name, $encoded_html, $langcode);

          $saves_count = $this->state->get('dxpr_builder.saves_count', 0) + 1;
          $this->state->set('dxpr_builder.saves_count', $saves_count);
        }

        break;

      // Get a list of block and view names.
      case 'dxpr_builder_get_cms_element_names':
        if ($this->dxprLicenseService->isBillableUser()) {
          $response = $this->getCmsElementNames();
        }

        break;

      // Get settings for various CMS elements.
      case 'dxpr_get_cms_element_settings':
        if ($this->dxprLicenseService->isBillableUser()) {
          $assets = $this->fetchPreRenderAssets();
          $post_name = $this->requestStack->getCurrentRequest()->request->get('name');
          $name = explode('-', $post_name);
          $type = $name[0];
          if ($name[0] === 'view') {
            $view_id = $name[1];
            $display_id = $name[2];
            $data = $this->getViewSettings($view_id, $display_id);
            $data['#printed'] = FALSE;
            unset($data['#markup']);
            $html = $this->renderer->render($data);
          }
          if ($name[0] === 'block') {
            // Name is for example "block-system_menu_block:secondary-menu".
            $plugin_id = substr($post_name, 6);
            $settings = $this->getBlockSettings($plugin_id);
            // Render the fields in a form tag as expected by the frontend.
            // @see CMSSettingsParamType()
            $settings['#printed'] = FALSE;
            unset($settings['#markup']);
            $html = strval($this->renderer->renderRoot($settings));
            $html = '<form>' . $html . '</form>';
            $assets = AttachedAssets::createFromRenderArray($settings);
          }
          $data = $this->fetchPostRenderAssets($assets);
          $data['data'] = $html;
          $response = new JsonResponse($data);
        }

        break;

      // Load a given CMS element.
      case 'dxpr_builder_load_cms_element':
        $request = $this->requestStack->getCurrentRequest()->request;
        $name = $request->get('name');
        $element_info = $this->dxprBuilderService->parseStringForCmsElementInfo($name);
        $settings = $request->get('settings');
        $data = $request->all()['data'];

        $assets = $this->fetchPreRenderAssets();
        $html = $this->loadCmsElement($element_info, $settings, $data, $assets);
        $response = $this->fetchPostRenderAssets($assets);
        $response['data'] = $html;
        $response = new JsonResponse($response);

        break;

      // Get the templates for a given page.
      case 'dxpr_get_page_templates':
        if ($this->dxprLicenseService->isBillableUser()) {
          $response = $this->getPageTemplates();
        }

        break;

      // Load a given template.
      case 'dxpr_load_page_template':
        if ($this->dxprLicenseService->isBillableUser()) {
          $uuid = $this->requestStack->getCurrentRequest()->request->get('uuid');

          $response = new HtmlResponse($this->loadPageTemplate($uuid));
        }

        break;

      // Get the templates for the current user.
      case 'dxpr_get_templates':
        if ($this->dxprLicenseService->isBillableUser()) {
          $response = $this->getUserTemplates();
        }

        break;

      // Load a template for the current user.
      case 'dxpr_load_template':
        if ($this->dxprLicenseService->isBillableUser()) {
          $uuid = $this->requestStack->getCurrentRequest()->request->get('uuid');

          $response = new HtmlResponse($this->loadUserTemplate($uuid));
        }

        break;

      // Save a template for the current user.
      case 'dxpr_save_template':
        if ($this->dxprLicenseService->isBillableUser()) {
          $name = $this->requestStack->getCurrentRequest()->request->get('name');
          $template = $this->requestStack->getCurrentRequest()->request->get('template');
          $global = (bool) $this->requestStack->getCurrentRequest()->request->get('global');

          $response = $this->saveUserTemplate($name, $template, $global);
        }

        break;

      // Delete a template for the current user.
      case 'dxpr_delete_template':
        if ($this->dxprLicenseService->isBillableUser()) {
          $template_name = $this->requestStack->getCurrentRequest()->request->get('name');

          $response = $this->deleteUserTemplate($template_name);
        }

        break;

      // Accept an array of fids and return comma-separated image URLs.
      case 'dxpr_builder_get_image_urls':
        if ($this->dxprLicenseService->isBillableUser()) {
          $mediaIds = $this->requestStack->getCurrentRequest()->request->all()['entityIDs'];
          // If there are no any file IDs, we can't provide images.
          if (empty($mediaIds)) {
            return new Response(status: Response::HTTP_NO_CONTENT);
          }

          $imageStyle = $this->requestStack->getCurrentRequest()->request->get('imageStyle');
          $entityType = $this->requestStack->getCurrentRequest()->request->get('entityType');

          if ($entityType === 'media') {
            /** @var \Drupal\media\Entity\Media[] $mediaEntities */
            $mediaEntities = $this->entityTypeManager->getStorage('media')
              ->loadMultiple($mediaIds);

            foreach ($mediaEntities as $media) {
              if ($media->bundle() === 'acquia_dam_image_asset') {
                $entityIds[$media->bundle()][] = $media;
              }

              if ($media->bundle() === 'image') {
                // Set default image field value.
                $field_name = 'field_media_image';
                $media_bundle_type = $media->get('bundle')->entity;
                // Check media type configs.
                if (
                  $media_bundle_type instanceof MediaType
                  && $plugins = $media_bundle_type->getPluginCollections()
                ) {
                  $source = $plugins['source_configuration'];
                  $configs = $source->getConfiguration();
                  // Use field name from Media type configuration.
                  $field_name = $configs['source_field'];
                }

                // Collect "image" file ids from "image" media entities.
                $entityIds[$media->bundle()][] = $media->{$field_name}->target_id;
              }
            }

            if (empty($entityIds)) {
              return new Response(status: Response::HTTP_NO_CONTENT);
            }
          }
          else {
            $entityIds[$entityType] = $mediaIds;
          }

          foreach ($entityIds as $bundle => $ids) {
            if ($bundle === 'acquia_dam_image_asset') {
              /** @var \Drupal\media\Entity\Media[] $ids */
              $remote_image_urls = $this->getAcquiaAssetsImageUrl($ids, $imageStyle);
            }
            else {
              // This should be "image" media type.
              $local_image_urls = $this->getImageUrls($ids, $imageStyle);
            }
          }

          // Merge all urls to the one string.
          $image_urls = ($remote_image_urls ?? '') . ',' . ($local_image_urls ?? '');

          $response = new HtmlResponse(trim($image_urls, ','));
        }

        break;

      case 'dxpr_builder_get_image_style_url':
        if ($this->dxprLicenseService->isBillableUser()) {
          $imageStyle = $this->requestStack->getCurrentRequest()->request->get('imageStyle');
          $entityId = $this->requestStack->getCurrentRequest()->request->get('entityId');
          $entityTypeId = $this->requestStack->getCurrentRequest()->request->get('entityTypeId');

          // For the moment, entity could be either "file" ("image" bundle)
          // or "media".
          $entity = $this->entityTypeManager->getStorage($entityTypeId)->load($entityId);

          if (!$entity instanceof ContentEntityInterface) {
            return new Response(status: Response::HTTP_NO_CONTENT);
          }

          if ($entity instanceof FileInterface) {
            $fileUri = $entity->getFileUri();

            $isSvg = str_ends_with($fileUri, '.svg');
            if ($imageStyle !== 'original' && !$isSvg) {
              /** @var \Drupal\image\Entity\ImageStyle $image_style */
              $image_style = $this->entityTypeManager->getStorage('image_style')->load($imageStyle);
              $url = $image_style->buildUrl($fileUri);
            }
            else {
              $url = $this->fileUrlGenerator->generateAbsoluteString($fileUri);
            }

            $url_full = $this->joinQueryParameters(
              url: $this->fileUrlGenerator->transformRelative($url),
              query_params: ['fid' => $entityId]
            );
          }

          if ($entity instanceof MediaInterface && $entity->bundle() === 'acquia_dam_image_asset') {
            /** @var \Drupal\media\MediaInterface $entity */
            $url_full = $this->getAcquiaAssetsImageUrl([$entity], $imageStyle);
          }

          $response = new Response(
            content: $url_full ?? '',
            status: isset($url_full) ? Response::HTTP_OK : Response::HTTP_NO_CONTENT);
        }

        break;

      // Get image metadata (alt text, title) for populating form fields.
      case 'dxpr_builder_get_image_metadata':
        if (!$this->dxprLicenseService->isBillableUser()) {
          return new JsonResponse(['error' => 'Access denied'], Response::HTTP_FORBIDDEN);
        }

        $entityId = $this->requestStack->getCurrentRequest()->request->get('entityId');
        $entityType = $this->requestStack->getCurrentRequest()->request->get('entityType');

        // Validate required parameters.
        if (empty($entityId) || empty($entityType)) {
          return new JsonResponse(['error' => 'Missing required parameters'], Response::HTTP_BAD_REQUEST);
        }

        // Load the entity based on type.
        try {
          $entity = $this->entityTypeManager->getStorage($entityType)->load($entityId);

          if (!$entity instanceof ContentEntityInterface) {
            return new JsonResponse(['error' => 'Entity not found'], Response::HTTP_NOT_FOUND);
          }

          // Get metadata based on the entity type.
          $metadata = $this->getImageMetadata($entity);

          $response = new JsonResponse(['data' => $metadata]);
        }
        catch (\Exception $e) {
          $response = new JsonResponse(['error' => 'Failed to load entity'], Response::HTTP_INTERNAL_SERVER_ERROR);
        }

        break;

      // Content lock status.
      case 'dxpr_content_lock_status':
        $entity_id = $this->requestStack->getCurrentRequest()->request->get('entity_id');
        $revision_id = $this->requestStack->getCurrentRequest()->request->get('revision_id');
        $entity_type = $this->requestStack->getCurrentRequest()->request->get('entity_type');
        $langcode = $this->requestStack->getCurrentRequest()->request->get('langcode');
        $response = $this->contentLock->contentLockStatus($entity_id, $revision_id, $entity_type, $langcode);
        break;

      // Toggle content lock.
      case 'dxpr_toggle_content_lock':
        $entity_id = $this->requestStack->getCurrentRequest()->request->get('entity_id');
        $revision_id = $this->requestStack->getCurrentRequest()->request->get('revision_id');
        $entity_type = $this->requestStack->getCurrentRequest()->request->get('entity_type');
        $langcode = $this->requestStack->getCurrentRequest()->request->get('langcode');
        $toggle_action = $this->requestStack->getCurrentRequest()->request->get('toggle_action');
        $response = $this->contentLock->toggleContentLock($entity_id, $revision_id, $entity_type, $langcode, $toggle_action);
        break;
    }
    return $response;
  }

  /**
   * {@inheritdoc}
   *
   * @return \Symfony\Component\HttpFoundation\JsonResponse
   *   Returns json response.
   */
  public function validateHelpLink() {
    $help_link = $this->requestStack->getCurrentRequest()->request->get('help_link');

    if ($help_link && str_contains($help_link, 'dxpr.com/documentation/')) {

      try {
        /* @phpstan-ignore-next-line */
        $response = $this->httpClient->head($help_link);

        // Send TRUE if help link is valid and exists on dxpr.com.
        if ($response->getStatusCode() === 200) {
          return new JsonResponse([TRUE]);
        }
      }
      catch (GuzzleException $e) {
        return new JsonResponse([FALSE]);
      }
    }

    return new JsonResponse([]);
  }

  /**
   * Opens the media library interface for selecting image media items.
   *
   * This method ensures that the Media Library Builder is available before
   * attempting to open the media library. It creates a state configuration
   * specifically for image media types, including parameters for allowed
   * media types, remaining selection slots, and optional opener parameters
   * like UUID. If the Media Library Builder is not available, a forbidden
   * response will be returned.
   *
   * It works in iframes only, otherwise error will be raised.
   *
   * @return mixed[]|Response
   *   A render array for the media library interface if successful, or a
   *   Response object indicating that the media library feature is not enabled.
   */
  public function openImageMediaLibrary(): array|Response {
    // Ensure the media library builder is available.
    if (!$this->medialLibraryBuilder) {
      return new Response('Media Library is not enabled. Please enable it to access this feature.', Response::HTTP_FORBIDDEN);
    }

    $dxpr_builder_settings = $this->config('dxpr_builder.settings');
    if ($dxpr_builder_settings->get('media_browser') === 'media_library') {
      $media_type = 'image';
    }
    if ($dxpr_builder_settings->get('media_browser') === 'media_library_acquia_dam') {
      $media_type = 'acquia_dam_image_asset';
    }

    if (empty($media_type)) {
      return new Response(sprintf('The "%s" settings is not supported.', $dxpr_builder_settings['media_browser']), Response::HTTP_BAD_REQUEST);
    }

    $cardinality = $this->requestStack->getCurrentRequest()->query->get('remaining_slots');
    // This parameter needs to differentiate the UI if the field is single or
    // multivalued.
    $uuid = $this->requestStack->getCurrentRequest()->query->get('uuid');

    // This state will be existed till the response returning.
    // So, all required and useful data could be added here.
    $state = MediaLibraryState::create(
      opener_id: 'media_library.opener.dxpr_builder',
      allowed_media_type_ids: [$media_type],
      selected_type_id: $media_type,
      remaining_slots: $cardinality ?: 1,
      opener_parameters: ['uuid' => $uuid ?? NULL]
    );

    // Build the media library UI render array.
    return $this->medialLibraryBuilder->buildUi($state);
  }

  /**
   * Get the base URL of the current request.
   *
   * @return string
   *   The path.
   */
  private function getBase() {
    $current_request = $this->requestStack->getCurrentRequest();
    return $current_request->getSchemeAndHttpHost() . $current_request->getBasePath();
  }

  /**
   * Determine if user has access to edit with the dxpr builder.
   *
   * @return \Symfony\Component\HttpFoundation\JsonResponse
   *   Description
   */
  private function hasEditAccess() {
    return new JsonResponse($this->dxprLicenseService->isBillableUser());
  }

  /**
   * Callback to get container types.
   *
   * @return \Symfony\Component\HttpFoundation\JsonResponse
   *   Description
   */
  private function getContainerTypes() {
    // Lists fields that use DXPR Builder as default field formatter,
    // used in DXPR container element.
    $container_types = [];

    $entity_definitions = $this->entityTypeManager->getDefinitions();
    foreach (array_keys($entity_definitions) as $entity_type) {
      // Only act on fieldable entity types.
      if ($entity_definitions[$entity_type]->get('field_ui_base_route')) {
        $bundle_info = $this->entityTypeBundleInfoManager->getBundleInfo($entity_type);
        if ($bundle_info) {
          foreach (array_keys($bundle_info) as $bundle) {
            $fields = $this->entityFieldManager->getFieldDefinitions($entity_type, $bundle);
            foreach ($fields as $field_id => $field_info) {
              /** @var \Drupal\Core\Entity\Display\EntityViewDisplayInterface|null $view_display */
              $view_display = $this->entityTypeManager->getStorage('entity_view_display')
                ->load($entity_type . '.' . $bundle . '.default');
              if ($view_display) {
                /** @var \Drupal\Component\Plugin\DerivativeInspectionInterface|null $renderer */
                $renderer = $view_display->getRenderer($field_id);
                if ($renderer && $renderer->getBaseId() === 'dxpr_builder_text') {
                  $container_types[$entity_type . '|' . $bundle] = $entity_type . ' - ' . $bundle;
                }
              }
            }
          }
        }
      }
    }

    return new JsonResponse($container_types);
  }

  /**
   * Callback to get container types.
   *
   * @param string $entityType
   *   The type of entity to check.
   * @param string $bundle
   *   The bundle of the given entity.
   *
   * @return \Symfony\Component\HttpFoundation\JsonResponse
   *   Description
   */
  private function getContainerNames($entityType, $bundle) {
    // Lists field instances that use DXPR Builder as default field formatter,
    // used in DXPR container element. Get the display for the bundle.
    /** @var \Drupal\Core\Entity\Display\EntityViewDisplayInterface $display */
    $display = $this->entityTypeManager
      ->getStorage('entity_view_display')
      ->load($entityType . '.' . $bundle . '.default');

    $fields = $this->entityFieldManager->getFieldDefinitions($entityType, $bundle);
    $dxpr_fields = [];
    // Loop through each of the fields.
    foreach ($fields as $field) {
      // Get the formatter for the field.
      /** @var \Drupal\Component\Plugin\DerivativeInspectionInterface|null $renderer */
      $renderer = $display->getRenderer($field->getName());
      if ($renderer) {
        // Check to see if the formatter is dxpr_builder_text.
        if ($renderer->getBaseId() === 'dxpr_builder_text') {
          $dxpr_fields[$field->getName()] = $field->getLabel();
        }
      }
    }

    // @phpstan-ignore method.alreadyNarrowedType
    $query = $this->entityTypeManager->getStorage($entityType)->getQuery()->accessCheck();
    $entity_ids = $query->condition('type', $bundle)
      ->execute();
    $entities = $this->entityTypeManager->getStorage($entityType)->loadMultiple($entity_ids);
    $container_names = [];
    /** @var \Drupal\Core\Entity\ContentEntityInterface $entity */
    foreach ($entities as $entity_id => $entity) {
      // Return the translated entites if exist.
      if ($entity->isTranslatable()) {
        foreach ($dxpr_fields as $field_name => $field_label) {
          $languages = $entity->getTranslationLanguages();
          foreach ($languages as $langcode => $language) {
            $translatedEntity = $entity->getTranslation($langcode);
            $container_names[$translatedEntity->id() . '|' . $field_name . '|' . $langcode] = $translatedEntity->label() . '|' . $field_label;
          }
        }
      }
      else {
        foreach ($dxpr_fields as $field_name => $field_label) {
          $container_names[$entity_id . '|' . $field_name] = $entity->label() . '|' . $field_label;
        }
      }
    }

    return new JsonResponse($container_names);
  }

  /**
   * Saves a new container.
   *
   * @param string $entityType
   *   The type of entity.
   * @param string $bundle
   *   The type of bundle.
   * @param string|int $entityId
   *   The entity ID.
   * @param string|int $revisionId
   *   The entity revision ID.
   * @param string $fieldName
   *   The field name.
   * @param string|null $encodedHtml
   *   The html to be decoded.
   * @param string $langcode
   *   The language of the entity to be saved.
   *
   * @return \Symfony\Component\HttpFoundation\JsonResponse
   *   Empty response.
   */
  private function saveContainer($entityType, $bundle, $entityId, $revisionId, $fieldName, $encodedHtml, $langcode) {
    // Abort the save operation if encodedHtml is not a string.
    if (!is_string($encodedHtml)) {
      $this->getLogger('dxpr_builder')->warning('Unable to process invalid content data for entity {type}/{id}.', [
        '@type' => $entityType,
        '@id' => $entityId,
      ]);
      return new JsonResponse($this->t('The content data is invalid and cannot be processed.'), Response::HTTP_BAD_REQUEST);
    }

    // Saves DXPR Builder container instance to field, respecting
    // permissions, language and revisions if supported.
    $entity_storage = $this->entityTypeManager->getStorage($entityType);

    $entity = $entity_storage->load($entityId);

    if (!$entity instanceof ContentEntityInterface) {
      // Keep error logging for actual failures.
      $this->getLogger('dxpr_builder')->error('Failed to load base entity {id}.', ['@id' => $entityId]);
      return new JsonResponse('Failed to load entity', 500);
    }

    // Failing if it doesn't exist but was requested.
    if ($entity->hasTranslation($langcode)) {
      $entity = $entity->getTranslation($langcode);
    }
    elseif ($entity->isTranslatable()) {
      // Translation was requested but doesn't exist.
      $this->getLogger('dxpr_builder')->warning('Attempted to save non-existent translation {lang} for entity {type}/{id}.', [
        '@lang' => $langcode,
        '@type' => $entityType,
        '@id' => $entityId,
      ]);
      return new JsonResponse($this->t('The requested translation ({langcode}) does not exist for this content.', ['@langcode' => $langcode]), 404);
    }
    else {
      // Entity is not translatable. Check langcode matches actual language.
      if ($entity->language()->getId() !== $langcode) {
        $this->getLogger('dxpr_builder')->warning('Attempted to save with language {lang} for non-translatable entity {type}/{id} which has language {entity_lang}.', [
          '@lang' => $langcode,
          '@type' => $entityType,
          '@id' => $entityId,
          '@entity_lang' => $entity->language()->getId(),
        ]);
        return new JsonResponse($this->t('The requested language ({langcode}) is not applicable to this content.', ['@langcode' => $langcode]), 400);
      }
    }

    if ($entity->access('update', $this->currentUser)) {
      $decoded_short_code = rawurldecode($this->decodeData($encodedHtml));

      $field_values = $entity->get($fieldName)->getValue();
      $field_value = $field_values[0];
      $field_value['value'] = $decoded_short_code;

      $entity->get($fieldName)->set(0, $field_value);

      // Check if the entity type supports revisions.
      if ($entity->getEntityType()->isRevisionable()) {
        $entity->setNewRevision();
        $entity->isDefaultRevision(TRUE);

        if ($entity instanceof RevisionLogInterface) {
          // If a new revision is created, save the current user as
          // revision author.
          $entity->setRevisionUserId($this->currentUser->id());
          $entity->setRevisionLogMessage('Saved with DXPR builder');
          $entity->setRevisionCreationTime($this->getRequestTime());
        }
      }

      // Delete locked content.
      $this->contentLock->deleteLockedContent($entityId, $revisionId, $entityType, $langcode);

      // Save entity.
      $entity->save();
    }

    // Update information in Layout Builder if it enabled.
    if (!is_null($this->inlineBlockUsage) && $usage = $this->inlineBlockUsage->getUsage($entity->id())) {
      // Get related entity from Layout Builder.
      /** @var \Drupal\Core\Entity\EntityInterface|null $related_entity */
      $related_entity = $this->entityTypeManager->getStorage($usage->layout_entity_type)->load($usage->layout_entity_id);
      if (method_exists($related_entity, 'get') && $layout = $related_entity->get('layout_builder__layout')->getValue()) {
        // Check all layouts of entity.
        foreach ($layout as $section) {
          // Check all sections.
          foreach ($section['section']->getComponents() as $component) {
            if ($component instanceof SectionComponent) {
              $configurations = $component->get('configuration');
              // Update block revision id in configuration if exists.
              if (isset($configurations['block_revision_id']) && $configurations['block_revision_id'] == $revisionId) {
                $configurations['block_revision_id'] = $entity->getRevisionId();
                $component->setConfiguration($configurations);
              }
            }
          }
        }
        if (method_exists($related_entity, 'set')) {
          // Update layout in related entity.
          $related_entity->set('layout_builder__layout', $layout);
          $related_entity->save();
        }
      }
    }

    return new JsonResponse('');
  }

  /**
   * Get Drupal blocks and views displays in DXPR Builder elements modal.
   *
   * @return \Symfony\Component\HttpFoundation\JsonResponse
   *   Description
   */
  private function getCmsElementNames() {
    return new JsonResponse($this->dxprBuilderService->getCmsElementNames());
  }

  /**
   * Get the element settings for the given view.
   *
   * @param string $viewId
   *   The ID of the view.
   * @param string $displayId
   *   The ID of the display for the given view.
   *
   * @return mixed[]
   *   The settings for the given view
   */
  private function getViewSettings($viewId, $displayId) {
    // Fetches settings for views display element settings modal.
    $executable_view = Views::getView($viewId);
    $executable_view->setDisplay($displayId);
    $executable_view->initHandlers();
    $executable_view->build();

    return $executable_view->exposed_widgets;
  }

  /**
   * Get the settings form for the given block.
   *
   * @param string $plugin_id
   *   The ID of the block.
   *
   * @return array
   *   The settings for the given block
   *
   * @phpstan-return array<string, mixed>
   */
  private function getBlockSettings($plugin_id): array {
    $entity = $this->entityTypeManager()->getStorage('block')->create([
      'plugin' => $plugin_id,
      'theme' => NULL,
    ]);
    $form = $this->entityFormBuilder()->getForm($entity);

    // Custom block configuration fields are added directly in the block config
    // form, without using a separate container. Remove the default fields,
    // since they are duplicate with the config provided by DXPR.
    $settings = $form['settings'];

    foreach ([
      'provider',
      'admin_label',
      'label',
      'label_display',
      'context_mapping',
    ] as $key) {
      unset($settings[$key]);
    }

    $this->updateFormNames($settings);
    $this->expandFieldsets($settings);

    return $settings;
  }

  /**
   * Update name attributes for form elements to match output structure.
   *
   * The names used in the form HTML uses the complete array structure.
   * However, the expected output structure is flattened, except when
   * #tree is set to TRUE. This method updates the name attributes
   * so that we can extract the correct output client-side.
   *
   * @param mixed[] $form
   *   The form structure.
   * @param bool $in_tree
   *   Indicates if #tree was set.
   * @param string[] $prefix
   *   Prefix to use for name.
   */
  private function updateFormNames(array &$form, $in_tree = FALSE, array $prefix = []): void {
    foreach (Element::children($form) as $name) {
      if (!empty($form[$name]['#name'])) {
        $html_name = '';
        foreach (array_merge($prefix, [$name]) as $index => $part) {
          if ($index) {
            $html_name .= "[$part]";
          }
          else {
            $html_name .= $part;
          }
        }
        $form[$name]['#name'] = $html_name;
      }
      $new_in_tree = $in_tree || !empty($form[$name]['#tree']);
      $this->updateFormNames($form[$name], $new_in_tree, $in_tree ? array_merge($prefix, [$name]) : $prefix);
    }
  }

  /**
   * Expand all fieldsets in the form.
   *
   * Fieldsets do not expand/collapse in all admin themes (e.g. Bootstrap).
   * Expanding all fieldsets ensures that they remain usable in all themes.
   *
   * @param mixed[] $form
   *   The form structure.
   */
  private function expandFieldsets(array &$form): void {
    foreach (Element::children($form) as $name) {
      if (isset($form[$name]['#type']) && $form[$name]['#type'] == 'details') {
        $form[$name]['#open'] = TRUE;
      }
      $this->expandFieldsets($form[$name]);
    }
  }

  /**
   * Loads settings for a CMS element - often views.
   *
   * @param mixed[] $element_info
   *   An array of info regarding the element to be returned.
   * @param string $settings
   *   Settings for the elmeent to be loaded.
   * @param mixed[] $data
   *   Data on the element to be returned.
   * @param \Drupal\Core\Asset\AttachedAssets $assets
   *   Any assets for the found element will be attached to this element.
   */
  private function loadCmsElement(array $element_info, $settings, array $data, AttachedAssets $assets): string {
    // Loads Drupal block or views display.
    return $this->dxprBuilderService->loadCmsElement($element_info, $settings, $data, $assets);
  }

  /**
   * Get the list of page templates for the dxpr builder.
   *
   * @return \Symfony\Component\HttpFoundation\JsonResponse
   *   Description
   */
  private function getPageTemplates() {
    // This refers to the templates you see when you click
    // "CHOOSE A TEMPLATE" on an empty DXPR Builder container.
    /** @var \Drupal\dxpr_builder\Entity\DxprBuilderPageTemplate[] $page_templates */
    $page_templates = $this->entityTypeManager->getStorage('dxpr_builder_page_template')
      ->loadByProperties(['status' => 1]);

    $templates = [];
    foreach ($page_templates as $page_template) {
      if (!$image = $page_template->getImageData()) {
        $image = $this->getBase() . '/' . $this->extensionListModule->getPath('dxpr_builder') . '/images/dxpr_templates/not-found.png';
      }
      $templates[] = [
        'title' => $page_template->label(),
        'uuid' => $page_template->uuid(),
        'module' => $page_template->get('module'),
        'category' => $page_template->get('category'),
        'image' => $image,
      ];
    }

    return new JsonResponse($templates);
  }

  /**
   * Load a dxpr builder page template.
   *
   * @param string $uuid
   *   The unique identifier for the page template to be loaded.
   *
   * @return string
   *   The template for the page, with all tokens replaced with actual values
   *
   * @throws \Drupal\Component\Plugin\Exception\InvalidPluginDefinitionException
   * @throws \Drupal\Component\Plugin\Exception\PluginNotFoundException
   */
  private function loadPageTemplate($uuid) {
    $template = '';
    /** @var \Drupal\dxpr_builder\Entity\DxprBuilderPageTemplate[] $templates */
    $templates = $this->entityTypeManager->getStorage('dxpr_builder_page_template')
      ->loadByProperties([
        'uuid' => $uuid,
        'status' => 1,
      ]);
    if ($templates) {
      $template = reset($templates);
      $template = $template->get('template');
      $this->dxprBuilderService->replaceBaseTokens($template);
    }
    return $template;
  }

  /**
   * Get the list of dxpr builder templates for the current user.
   *
   * @return \Symfony\Component\HttpFoundation\JsonResponse
   *   Description
   */
  private function getUserTemplates() {
    $entityType = 'dxpr_builder_user_template';
    $query = $this->entityTypeManager->getStorage($entityType)->getQuery();

    $group = $query->orConditionGroup()
      ->condition('uid', $this->currentUser->id())
      ->condition('global', TRUE);
    $query->condition($group);
    // @phpstan-ignore method.alreadyNarrowedType
    $entity_ids = $query->accessCheck()->execute();
    $user_templates = DxprBuilderUserTemplate::loadMultiple($entity_ids);

    $templates = [];
    $i = 0;
    foreach ($user_templates as $template) {
      $author_id = $template->get('uid');
      /** @var \Drupal\user\UserInterface $author */
      $author = $this->entityTypeManager->getStorage('user')->load($author_id);
      $templates[$i]['id'] = $template->id();
      $templates[$i]['uuid'] = $template->uuid();
      $templates[$i]['name'] = $template->label();
      $templates[$i]['global'] = $template->get('global');
      // Provide image for Saved templates modal if available.
      $image = $template->getImageData();
      if ($image) {
        $templates[$i]['image'] = $image;
      }
      // Check if the current user is the author of template.
      $current_user_is_author = FALSE;
      if ($this->currentUser->id() == $template->get('uid')) {
        $current_user_is_author = TRUE;
      }
      $templates[$i]['current_user_is_author'] = $current_user_is_author;
      $templates[$i]['author_id'] = $author_id;
      $templates[$i]['author_name'] = $author->getAccountName();

      // Get type from template.
      $html = $template->get('template');
      $type = 'custom';

      if (preg_match('/\\bdata-azb\\s*=\\s*[\"\\\']([^\"\\\']*)[\"\\\']/', $html, $matches)) {
        $type = $matches[1];

        // az_block and az_view attribute values are prefixes.
        if (str_starts_with($type, 'az_block')) {
          $type = 'az_block';
        }
        if (str_starts_with($type, 'az_view')) {
          $type = 'az_view';
        }
      }

      $templates[$i]['type'] = $type;
      $i++;
    }

    return new JsonResponse($templates);
  }

  /**
   * Loads and processes a user template based on its UUID.
   *
   * @param string $uuid
   *   The UUID of the user template to load.
   *
   * @return string
   *   The processed template content, or an empty string
   *   if no template is found.
   *
   * @throws \Drupal\Component\Plugin\Exception\InvalidPluginDefinitionException
   * @throws \Drupal\Component\Plugin\Exception\PluginNotFoundException
   */
  private function loadUserTemplate(string $uuid): string {
    /** @var \Drupal\dxpr_builder\Entity\DxprBuilderUserTemplate[] $templates */
    $templates = $this->entityTypeManager->getStorage('dxpr_builder_user_template')
      ->loadByProperties([
        'uuid' => $uuid,
        'status' => 1,
      ]);
    if ($templates) {
      $template = reset($templates);
      $template = $template->get('template');
      $this->dxprBuilderService->replaceBaseTokens($template);
    }

    return $template ?? '';
  }

  /**
   * Create machine name for user template.
   *
   * @param string $template_name
   *   The name of the user template.
   *
   * @return string
   *   Description
   */
  private function createUserTemplateMachineName($template_name) {
    return preg_replace('@[^a-z0-9_]+@', '_', strtolower($template_name));
  }

  /**
   * Helper function to check if the template exists.
   *
   * @param string $machine_name
   *   The machine name of the user template.
   *
   * @return bool
   *   Checking result.
   */
  private function userTemplateIsExists($machine_name) {
    $user_template = DxprBuilderUserTemplate::load($machine_name);
    if ($user_template) {
      return TRUE;
    }
    return FALSE;
  }

  /**
   * Save the given template for the current user.
   *
   * @param string $template_name
   *   The name of the template to be saved.
   * @param string $template_contents
   *   The contents of the template to be saved.
   * @param bool $global
   *   The type of template is global or private.
   *
   * @return \Symfony\Component\HttpFoundation\JsonResponse|bool
   *   Description
   */
  public function saveUserTemplate($template_name, $template_contents, $global) {
    if (!$this->dxprLicenseService->isBillableUser()) {
      return FALSE;
    }

    $machine_name = $this->createUserTemplateMachineName($template_name);

    // Validate template name to make sure that is unique name.
    if ($this->userTemplateIsExists($machine_name)) {
      return new JsonResponse([
        'message' => $this->t('A template with the name "%name" already exists. Please choose another name.', [
          '%name' => $template_name,
        ]),
        'code' => 409,
      ]);
    }

    $user_template = DxprBuilderUserTemplate::create([
      'id' => $this->createUserTemplateMachineName($template_name),
      'label' => $template_name,
      'template' => $this->dxprBuilderService->insertBaseTokens($template_contents),
      'uid' => $this->currentUser->id(),
      'global' => $global,
    ]);

    // Optional image passed by the Save Template modal.
    // Image may come from application/x-www-form-urlencoded,
    // multipart or JSON.
    $request = $this->requestStack->getCurrentRequest();
    $image_param = $request->request->get('image');
    if (!$image_param && $request->files->has('image')) {
      // If a file was uploaded, convert to base64.
      /** @var \Symfony\Component\HttpFoundation\File\UploadedFile $file */
      $file = $request->files->get('image');
      try {
        $contents = file_get_contents($file->getPathname());

        // Validate that the file is actually an image.
        if (!$this->templateImageValidator->isValidImageData($contents)) {
          return new JsonResponse([
            'message' => $this->t('The uploaded file is not a valid image.'),
            'code' => 400,
          ], 400);
        }

        $image_param = base64_encode($contents);
      }
      catch (\Throwable $e) {
        $image_param = '';
      }
    }
    if (!empty($image_param) && is_string($image_param)) {
      // Accept data URLs or pure base64 data.
      if (str_starts_with($image_param, 'data:image')) {
        $parts = explode(',', $image_param, 2);
        $image_param = $parts[1] ?? '';
      }
      if ($image_param !== '') {
        // Decode and validate image data.
        $binary_data = base64_decode($image_param);
        if (!$this->templateImageValidator->isValidImageData($binary_data)) {
          return new JsonResponse([
            'message' => $this->t('The provided image data is not valid.'),
            'code' => 400,
          ], 400);
        }

        // Process image through optimize image style if available.
        $image_param = $this->dxprBuilderService->processUserTemplateImage($image_param);
        $user_template->set('image', $image_param);
      }
    }

    $user_template->save();

    return new JsonResponse([
      'message' => $this->t('Saved template "%name"', ['%name' => $template_name]),
      'code' => 200,
    ]);
  }

  /**
   * Delete the given template for the current user.
   *
   * @param string $template_name
   *   The name of the template to be deleted.
   *
   * @return \Symfony\Component\HttpFoundation\JsonResponse
   *   Description
   */
  private function deleteUserTemplate($template_name) {
    $machine_name = $this->createUserTemplateMachineName($template_name);
    $user_template = DxprBuilderUserTemplate::load($machine_name);
    $user_template->delete();

    return new JsonResponse('');
  }

  /**
   * Creates image url from file ID.
   *
   * @param mixed[] $fileIds
   *   Array of files ids.
   * @param string $imageStyle
   *   The image style.
   *
   * @return string
   *   The image url.
   *
   * @todo This method should be replaced by ImagesHandlerTrait::getImageUrl()
   *   with appropriate refactoring.
   */
  private function getImageUrls(array $fileIds, $imageStyle) {
    $images = [];
    foreach ($fileIds as $fid) {
      /** @var \Drupal\file\FileInterface $file */
      $file = $this->entityTypeManager->getStorage('file')->load($fid);
      if ($imageStyle && $imageStyle !== 'original') {
        /** @var \Drupal\image\ImageStyleInterface $image_style */
        $image_style = $this->entityTypeManager->getStorage('image_style')
          ->load($imageStyle);
        $images[] = $this->joinQueryParameters(
          url: $this->fileUrlGenerator->transformRelative($image_style->buildUrl($file->getFileUri())),
          query_params: ['fid' => $fid]
        );
      }
      else {
        $images[] = $this->joinQueryParameters(
          url: $this->fileUrlGenerator->transformRelative($this->fileUrlGenerator->generateAbsoluteString($file->getFileUri())),
          query_params: ['fid' => $fid]
        );
      }
    }

    return implode(',', $images);
  }

  /**
   * Constructs a URL for an image asset from the given media entities.
   *
   * @param \Drupal\media\MediaInterface[] $medias
   *   An array of media entities.
   * @param string $image_style
   *   The image style to apply to the URL. Defaults to 'original'.
   *
   * @return string
   *   A comma-separated string of constructed image URLs, or an empty string
   *   if no valid media entities are provided.
   *
   * @throws \Drupal\Core\TypedData\Exception\MissingDataException
   *
   * @todo This method should be replaced by
   *   ImagesHandlerTrait::getAcquiaAssetImageUrl() with appropriate
   *   refactoring.
   */
  private function getAcquiaAssetsImageUrl(array $medias, string $image_style = 'original'): string {
    if (empty($medias)) {
      return '';
    }

    if (!class_exists(ComputedEmbedCodesField::class)) {
      // "Acquia DAM" module is disabled.
      return '';
    }

    foreach ($medias as $media) {
      if (
        !$media->hasField(ComputedEmbedCodesField::FIELD_NAME) ||
        $media->get(ComputedEmbedCodesField::FIELD_NAME)->isEmpty()
      ) {
        continue;
      }

      $urls_mapping = $media->get(ComputedEmbedCodesField::FIELD_NAME)
        ->first()
        ->getValue();

      if (!isset($urls_mapping[$image_style]['href'])) {
        continue;
      }

      $url = $urls_mapping[$image_style]['href'];
      $parts = UrlHelper::parse($url);

      // The url should contain "mid" parameter with media ID and
      // "acquiaDamAsset" tells js app that the url is a part of Acquia
      // Assets library.
      $images[] = $parts['path'] . '?' .
        UrlHelper::buildQuery($parts['query'] + [
          'mid' => $media->id(),
          'acquiaDamAsset' => TRUE,
          'imageStyle' => $image_style,
        ]);
    }

    return implode(',', $images ?? []);
  }

  /**
   * Decodes the given data.
   *
   * @param string|null $encoded
   *   The encoded data.
   *
   * @return string
   *   The decoded data
   */
  private function decodeData($encoded) {
    $decoded = "";
    for ($i = 0; $i < strlen($encoded); $i++) {
      $b = ord($encoded[$i]);
      $a = $b ^ 7;
      $decoded .= chr($a);
    }

    return $decoded;
  }

  /**
   * Description.
   */
  private function getRequestTime(): int {
    return $this->requestStack->getCurrentRequest()->server->get('REQUEST_TIME');
  }

  /**
   * Fixes the element for rendering.
   *
   * @param mixed[] $arr
   *   Array for scanning.
   */
  protected function addTagHelper(array &$arr): void {
    foreach ($arr as &$v_arr) {
      if (is_array($v_arr) && !empty($v_arr)) {
        if (!empty($v_arr['#tag']) && $v_arr['#tag'] === 'script') {
          $v_arr['#type'] = 'html_tag';
        }
        else {
          $this->addTagHelper($v_arr);
        }
      }
    }
  }

  /**
   * Save page assets before rendering.
   *
   * @return \Drupal\Core\Asset\AttachedAssets
   *   Assets to pass to fetchPostRenderAssets().
   */
  private function fetchPreRenderAssets() {
    $request = $this->requestStack->getCurrentRequest()->request;
    $ajax_page_state = $request->all()['ajax_page_state'];

    $assets = new AttachedAssets();
    $assets->setAlreadyLoadedLibraries(isset($ajax_page_state['libraries']) ? explode(',', $ajax_page_state['libraries']) : []);

    return $assets;
  }

  /**
   * Collect assets after rendering.
   *
   * @param \Drupal\Core\Asset\AttachedAssets $assets
   *   Assets retrieved by fetchPreRenderAssets().
   *
   * @return mixed[]
   *   Array with keys css, js, and settings.
   */
  private function fetchPostRenderAssets(AttachedAssets $assets) {
    $css_assets = $this->assetResolver->getCssAssets($assets, TRUE);
    $css = $this->cssAssetCollectionRenderer->render($css_assets);

    $js_assets = $this->assetResolver->getJsAssets($assets, TRUE);
    $js = '';
    $settings = '';
    foreach ($js_assets as $js_asset) {
      // Adds html_head scripts.
      if (!empty($js_asset['drupalSettings']['data']['dxpr_html_head'])) {
        $this->addTagHelper($js_asset['drupalSettings']['data']['dxpr_html_head']);
        $js_header = $this->renderer->render($js_asset['drupalSettings']['data']['dxpr_html_head']);
        $js .= $js_header->__toString();
        // Removes html_head from settings because it isn't real settings.
        unset($js_asset['drupalSettings']['data']['dxpr_html_head']);
      }

      $render = $this->jsAssetCollectionRenderer->render($js_asset);
      if (count($render)) {
        foreach ($render as $script) {
          if (isset($script['#attributes']['type']) && $script['#attributes']['type'] == 'application/json') {
            $settings = json_decode($script['#value']);
            continue;
          }
          $rendered = $this->renderer->render($script);
          $js .= $rendered->__toString();
        }
      }
    }

    return [
      'css' => count($css) ? $this->renderer->render($css)->__toString() : '',
      'js' => $js,
      'settings' => $settings,
    ];
  }

}
