<?php

/**
 * @file
 * Install/update hook implementations.
 */


use Drupal\field\Entity\FieldConfig;

/**
 * Implements hook_install().
 */
function islandora_fits_install($is_syncing) {

  if (!_islandora_fits_term_exists()) {
    $callable = $is_syncing ? [\Drupal::messenger(), 'addStatus'] : [\Drupal::messenger(), 'addWarning'];
    $callable(t('A term in the taxonomy @vid with the URI @uri does not appear to exist. The @migration_id migration can be executed to create it.', [
      '@vid' => 'islandora_media_use',
      '@uri' => 'https://projects.iq.harvard.edu/fits',
      '@migration_id' => 'islandora_fits_tags',
    ]));
  }

  // Add xml extension if it doesn't already exist.
  $field = FieldConfig::load("media.file.field_media_file");
  if ($field) {
    $fieldSettings = $field->getSettings();
    $extensions = $fieldSettings['file_extensions'];
    if (!strpos($extensions, 'xml')) {
      $fieldSettings['file_extensions'] .= ' xml';
      $field->set('settings', $fieldSettings);
      $field->save();
    }
  }
}

/**
 * Implements hook_requirements().
 */
function islandora_fits_requirements($phase) : array {
  $requirements = [];

  if ($phase == 'runtime') {
    $term_exists = _islandora_fits_term_exists();
    $requirements['islandora_fits_term_exists'] = [
      'title' => t('FITS Term Exists'),
      'value' => $term_exists ? t('Exists') : t('Does not exist'),
      'description' => t('Whether or not a term with the URI targeted by default FITS derivative configuration exists. If derivative configurations were made to target another URI, this can probably be ignored.'),
      'severity' => $term_exists ? REQUIREMENT_OK : REQUIREMENT_WARNING
    ];
  }

  return $requirements;
}

/**
 * Helper; determine if a term with the target URI exists.
 *
 * @return bool
 *   TRUE if a term (at least one) with the target URI exists; otherwise, FALSE.
 *
 * @throws \Drupal\Component\Plugin\Exception\InvalidPluginDefinitionException
 * @throws \Drupal\Component\Plugin\Exception\PluginNotFoundException
 */
function _islandora_fits_term_exists() {
  $query = \Drupal::entityTypeManager()->getStorage('taxonomy_term')->getQuery()
    ->condition('vid', 'islandora_media_use')
    ->condition('field_external_uri.uri', 'https://projects.iq.harvard.edu/fits')
    ->count();
  $count = $query->execute();
  return $count > 0;
}