<?php

/**
 * @file
 * Core media asset support for Lightning.
 */

use Drupal\Core\Asset\AttachedAssetsInterface;
use Drupal\Core\Entity\Entity\EntityFormDisplay;
use Drupal\Core\Form\FormStateInterface;
use Drupal\field\Entity\FieldConfig;
use Drupal\image\Entity\ImageStyle;
use Drupal\image\Plugin\ImageEffect\ResizeImageEffect;
use Drupal\media_entity\MediaBundleInterface;

/**
 * Implements template_preprocess_image_style().
 *
 * @param array $variables
 *   Template variables.
 */
function lightning_media_preprocess_image_style(array &$variables) {
  $extension = pathinfo($variables['uri'], PATHINFO_EXTENSION);

  // If this is an SVG and we don't know its dimensions, try to calculate them
  // through the image style's effect chain.
  if ($extension == 'svg' && (empty($variables['image']['#width']) || empty($variables['image']['#height']))) {
    $image_style = ImageStyle::load($variables['style_name']);

    // Loop through the effect chain, collecting configured dimensions for all
    // resizing effects.
    $dimensions = [];
    foreach ($image_style->getEffects() as $effect) {
      if ($effect instanceof ResizeImageEffect) {
        $configuration = $effect->getConfiguration();

        array_push($dimensions, [
          'width' => $configuration['data']['width'],
          'height' => $configuration['data']['height'],
        ]);
      }
    }
    // If we didn't collect any dimensions, there's nothing else to be done.
    if (empty($dimensions)) {
      return;
    }

    // Sort the configured dimensions in ascending order by an arbitrary axis,
    // which can be 'width' or 'height'.
    $axis = @$variables['sort_axis'] ?: 'width';
    usort($dimensions, function (array $a, array $b) use ($axis) {
      return $b[$axis] - $a[$axis];
    });

    // Start with the widest set of configured dimensions.
    $dimensions = end($dimensions);
    // Allow the image style to transform the dimensions as needed.
    $image_style->transformDimensions($dimensions, $variables['uri']);

    if ($dimensions['width']) {
      $variables['image']['#width'] = $dimensions['width'];
    }
    if ($dimensions['height']) {
      $variables['image']['#height'] = $dimensions['height'];
    }
  }
}

/**
 * Implements hook_form_FORM_ID_alter().
 */
function lightning_media_form_entity_browser_media_browser_form_alter(array &$form, FormStateInterface $form_state) {
  $form['#attached']['library'][] = 'lightning_media/browser.styling';
}

/**
 * Implements hook_entity_type_alter().
 */
function lightning_media_entity_type_alter(array &$entity_types) {
  if (\Drupal::moduleHandler()->moduleExists('multiversion')) {
    // Files should never be workspace-aware. Besides, they ALWAYS conflict during
    // replication, for reasons as yet unknown. But because Multiversion is
    // basically a one-way ticket, only opt file entities out of Multiversion if
    // they haven't been migrated into Multiversion's storage yet. There really
    // should be a method on MultiversionManagerInterface to determine if an
    // entity type has been migrated, so that we don't have to directly query
    // state keys...but hey, you gotta work with what you have.
    if (!\Drupal::state()->get('multiversion.migration_done.file')) {
      $entity_types['file']->set('multiversion', FALSE);
    }
  }
}

/**
 * Implements hook_ENTITY_TYPE_insert().
 */
function lightning_media_media_bundle_insert(MediaBundleInterface $bundle) {
  /** @var \Drupal\field\Entity\FieldConfig $field */
  $field = FieldConfig::create([
    'field_name' => 'field_media_in_library',
    'entity_type' => 'media',
    'bundle' => $bundle->id(),
  ]);

  $t = \Drupal::translation();
  $field
    ->setSetting('on_label', $t->translate('Saved to my media library'))
    ->setSetting('off_label', $t->translate('Not in my media library'))
    ->setLabel($t->translate('Save to my media library'))
    ->setDefaultValue(TRUE)
    ->save();

  $form_display = EntityFormDisplay::load('media.' . $bundle->id() . '.default');
  if (empty($form_display)) {
    $form_display = EntityFormDisplay::create([
      'targetEntityType' => 'media',
      'bundle' => $bundle->id(),
      'mode' => 'default',
      'status' => TRUE,
    ]);
  }
  $form_display->setComponent('field_media_in_library', [
    'type' => 'boolean_checkbox',
    'settings' => [
      'display_label' => TRUE,
    ],
  ])->save();
}

/**
 * Implements hook_form_FORM_ID_alter().
 */
function lightning_media_form_entity_embed_dialog_alter(array &$form, FormStateInterface $form_state) {
  list ($editor, $embed_button) = $form_state->getBuildInfo()['args'];

  /** @var \Drupal\embed\EmbedButtonInterface $embed_button */
  if ($embed_button->id() == 'media_browser') {
    $element = &$form['attributes']['data-entity-embed-settings']['view_mode'];
    if (isset($element['#options']['embedded'])) {
      $element['#default_value'] = 'embedded';
    }
  }
}

/**
 * Implements hook_js_settings_alter().
 */
function lightning_media_js_settings_alter(array &$settings, AttachedAssetsInterface $assets) {
  if (empty($settings['ajax'])) {
    $settings['ajax'] = [];
  }

  $route_name = \Drupal::routeMatch()->getRouteName();
  if (strpos($route_name, 'entity_browser') === 0 && isset($settings['ajaxPageState']['libraries'])) {
    $libraries = explode(',', $settings['ajaxPageState']['libraries']);
    // If we pretend EB's iframe library has not been previously loaded, it will
    // ALWAYS be fetched from the server, preventing (in a crappy, kludgey way)
    // the bug in #2768849.
    $libraries = array_diff($libraries, ['entity_browser/iframe']);
    $settings['ajaxPageState']['libraries'] = implode(',', $libraries);
  }
}

/**
 * Implements hook_ajax_render_alter().
 */
function lightning_media_ajax_render_alter(array &$data) {
  if (\Drupal::routeMatch()->getRouteName() == 'entity_embed.dialog') {
    foreach ($data as &$command) {
      if ($command['command'] == 'settings' && isset($command['settings']['ajaxPageState']['libraries'])) {
        $libraries = explode(',', $command['settings']['ajaxPageState']['libraries']);
        $libraries = array_diff($libraries, ['entity_browser/iframe']);
        $command['settings']['ajaxPageState']['libraries'] = implode(',', $libraries);
      }
    }
  }
}

/**
 * Preprocess function for grid views of the media library.
 *
 * @param array $variables
 *   Template variables.
 */
function lightning_media_preprocess_views_view_grid__media(array &$variables) {
  foreach ($variables['items'] as &$item) {
    foreach ($item['content'] as &$column) {
      $column['attributes']['data-selectable'] = 'true';
    }
  }
}