<?php

/**
 * Implements hook_token_info().
 */
function dds_content_token_info()
{
  return [
    'types' => [
      'dds_content' => [
        'name' => 'DDS tokens',
        'description' => '',
      ],
    ],
    'tokens' => [
      'dds_content' => [
        'dds_content_primary_image' =>[
          'name' => 'DDS Content primary image',
          'description' => 'Calculates the primary image for nodes',
        ],
      ],
    ],
  ];
}


/**
 * Implements hook_tokens().
 */
function dds_content_tokens($type, $tokens, array $data, array $options, \Drupal\Core\Render\BubbleableMetadata $bubbleable_metadata)
{
  $replacements = [];

  if ($type == 'dds_content') {
    if (!empty($data['node'])) {
      /** @var \Drupal\node\NodeInterface $node */
      $node = $data['node'];

      foreach ($tokens as $name => $original) {
        switch ($name) {
          case 'dds_content_primary_image':

            $url = '';
            if ($node->hasField('field_header_background') && !$node->field_header_background->isEmpty()) {
              if($media_entity = $node->field_header_background->entity) {
                if($thumbnail = $media_entity->thumbnail->entity) {
                  if($uri = $thumbnail->getFileUri()) {
                    $url = \Drupal::service('dds_media.media_helper')->get_styled_image_url($uri, 'large');
                  }
                }
              }
            }
            if ($url == '') {
              //todo: use fallback image
            }

            $replacements[$original] = $url;
            break;
        }
      }
    }
  }

  return $replacements;
}