<?php

/**
 * @file
 * General functions and hook implementations.
 *
 * @see https://harvesthq.github.com/chosen/
 */

use Drupal\Component\Plugin\Exception\PluginException;
use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\Render\Element;
use Drupal\Core\Routing\RouteMatchInterface;
use Drupal\Core\Url;
use Drupal\migrate\Exception\RequirementsException;
use Drupal\migrate_drupal\Plugin\migrate\source\DrupalSqlBase;

/**
 * Define chosen library url.
 */
define('CHOSEN_WEBSITE_URL', 'https://harvesthq.github.io/chosen');
define('CHOSEN_INCLUDE_ADMIN', 0);
define('CHOSEN_INCLUDE_NO_ADMIN', 1);
define('CHOSEN_INCLUDE_EVERYWHERE', 2);

/**
 * Implements hook_element_info_alter().
 */
function chosen_element_info_alter(&$info) {
  $info['select']['#pre_render'][] = '\Drupal\chosen\ChosenFormRender::preRenderSelect';

  if (\Drupal::moduleHandler()->moduleExists('date')) {
    $info['date_combo']['#pre_render'][] = '\Drupal\chosen\ChosenFormRender::preRenderDateCombo';
  }

  if (\Drupal::moduleHandler()->moduleExists('select_or_other')) {
    $info['select_or_other']['#pre_render'][] = '\Drupal\chosen\ChosenFormRender::preRenderSelectOther';
  }

  if (\Drupal::moduleHandler()->moduleExists('synonyms')) {
    $info['synonyms_entity_select']['#pre_render'][] = '\Drupal\chosen\ChosenFormRender::preRenderSelect';
  }
}

/**
 * Implements hook_field_widget_form_alter().
 *
 * Add entity type  and bundle information to the widget.
 *
 * @see chosen_pre_render_select()
 */

/**
 * Implements hook_field_widget_form_alter().
 */
function chosen_field_widget_form_alter(&$element, FormStateInterface $form_state, $context) {
  /** @var \Drupal\Core\Field\FieldDefinitionInterface $field_definition */
  $field_definition = $context['items']->getFieldDefinition();
  $element['#entity_type'] = $field_definition->getTargetEntityTypeId();
  $element['#bundle'] = $field_definition->getTargetBundle();
}

/**
 * Helper function to attach the Chosen library and settings to a given element.
 *
 * @param array &$element
 *   An render array element.
 */
function chosen_attach_library(array &$element) {
  $element['#attached']['library'][] = 'chosen/drupal.chosen';

  // Add specific styling for Claro.
  if (\Drupal::theme()->getActiveTheme()->getName() === 'claro') {
    $element['#attached']['library'][] = 'chosen/chosen.claro';
  }

  $chosen_conf = \Drupal::config('chosen.settings');

  $css_disabled_themes = $chosen_conf->get('disabled_themes');
  if (empty($css_disabled_themes)) {
    $css_disabled_themes = [];
  }

  // Only add the Chosen CSS if it is not disabled for the active theme.
  $theme_name = \Drupal::theme()->getActiveTheme()->getName();
  if (!in_array($theme_name, $css_disabled_themes, TRUE)) {
    $element['#attached']['library'][] = 'chosen_lib/chosen.css';
  }

  $options = [
    'disable_search' => (bool) $chosen_conf->get('disable_search'),
    'disable_search_threshold' => (int) $chosen_conf->get('disable_search_threshold'),
    'allow_single_deselect' => (bool) $chosen_conf->get('allow_single_deselect'),
    'search_contains' => (bool) $chosen_conf->get('search_contains'),
    'placeholder_text_multiple' => $chosen_conf->get('placeholder_text_multiple'),
    'placeholder_text_single' => $chosen_conf->get('placeholder_text_single'),
    'no_results_text' => $chosen_conf->get('no_results_text'),
    'max_shown_results' => $chosen_conf->get('max_shown_results'),
    'inherit_select_classes' => TRUE,
  ];

  $element['#attached']['drupalSettings']['chosen'] = [
    'selector' => $chosen_conf->get('jquery_selector'),
    'minimum_single' => (int) $chosen_conf->get('minimum_single'),
    'minimum_multiple' => (int) $chosen_conf->get('minimum_multiple'),
    'minimum_width' => (int) $chosen_conf->get('minimum_width'),
    'use_relative_width' => (bool) $chosen_conf->get('use_relative_width'),
    'options' => $options,
  ];
}

/**
 * Recurse through an element to apply the chosen property to any select fields.
 *
 * @param array $element
 *   The element.
 * @param int $chosen_value
 *   Chosen setting
 *
 * @return array
 *   The element.
 */
function chosen_element_apply_property_recursive(array &$element, $chosen_value = NULL) {
  if (!isset($chosen_value)) {
    if (isset($element['#chosen'])) {
      $chosen_value = $element['#chosen'];
    }
    else {
      return;
    }
  }
  if (isset($element['#type']) && $element['#type'] == 'select') {
    $element['#chosen'] = $chosen_value;
  }
  foreach (Element::children($element) as $key) {
    chosen_element_apply_property_recursive($element[$key], $chosen_value);
  }
}

/**
 * Implements hook_help().
 */
function chosen_help($route_name, RouteMatchInterface $route_match) {

  switch ($route_name) {
    case 'help.page.chosen':
      $output = '';
      $output = '<h3>' . t('About') . '</h3>';
      $output .= '<p>' . t('Chosen uses the Chosen jQuery plugin to make your < select > elements more user-friendly.') . '</p>';
      $output .= '<h3>' . t('Usage') . '</h3>';
      $output .= '<p>' . t('Configure at: <a href=":structure_types">admin/config/user-interface/chosen</a>', [':structure_types' => Url::fromRoute('chosen.admin')->toString()]) . '</p>';
      return $output;
  }

}

/**
 * Implements hook_migration_plugins_alter().
 */
function chosen_migration_plugins_alter(array &$migrations) {
  // Check if the module is enabled on source site.
  try {
    $variable_source = \Drupal::service('plugin.manager.migration')
      ->createStubMigration([
        'id' => 'foo',
        'idMap' => ['plugin' => 'null'],
        'source' => [
          'plugin' => 'variable',
          'ignore_map' => TRUE,
        ],
        'destination' => ['plugin' => 'null'],
      ])
      ->getSourcePlugin();
    if (!$variable_source instanceof DrupalSqlBase) {
      return;
    }
    $variable_source->checkRequirements();
  }
  catch (PluginException $e) {
    // The 'variable' source plugin isn't available because Migrate Drupal
    // isn't enabled. There is nothing we can do.
    return;
  }
  catch (RequirementsException $e) {
    // The source database is not a Drupal 7 database.
    return;
  }
  $system_data = $variable_source->getSystemData();
  if (empty($system_data['module']['chosen']['status'])) {
    unset($migrations['d7_chosen_settings']);
    return;
  }
  $chosen_migration = array_filter(
    $migrations,
    function ($definition) {
      return $definition['id'] === 'd7_field_instance_widget_settings';
    }
  );
  foreach (array_keys($chosen_migration) as $plugin_id) {
    $migrations[$plugin_id]['process']['options/type'][] = ['plugin' => 'chosen'];
  }
}