<?php

/**
 * @file
 * settings.theme
 */

use Drupal\Core\Form\FormStateInterface;
use Drupal\gin\GinSettings;

/**
 * Custom theme settings.
 */
function gin_form_system_theme_settings_alter(&$form, FormStateInterface $form_state, $form_id = NULL) {
  // Work-around for a core bug affecting admin themes. See issue #943212.
  if (isset($form_id)) {
    return;
  }

  /*
   * //////////////////////////
   * Move default theme settings to bottom.
   * * //////////////////////////
   */
  $form['logo']['#weight'] = 97;
  $form['favicon']['#open'] = FALSE;
  $form['favicon']['#weight'] = 98;
  $form['theme_settings']['#open'] = FALSE;
  $form['theme_settings']['#weight'] = 99;

  /*
   * //////////////////////////
   * General settings.
   * * ////////////////////////
   */
  /** @var \Drupal\gin\GinSettings $settings */
  $settings = \Drupal::classResolver(GinSettings::class);

  $form['custom_settings'] = [
    '#type' => 'details',
    '#open' => TRUE,
    '#title' => t('Settings'),
  ] + $settings->getSettingsForm();

  // Allow user settings.
  $form['custom_settings']['show_user_theme_settings'] = [
    '#type' => 'checkbox',
    '#title' => t('Users can override Gin settings'),
    '#description' => t('Expose the admin theme settings to users.'),
    '#default_value' => $settings->getDefault('show_user_theme_settings'),
  ];

  /*
   * //////////////////////////
   * Logo settings.
   * * ////////////////////////
   */
  if (isset($form['logo']['settings']['logo_upload']['#upload_validators']['file_validate_extensions'])) {
    $form['logo']['settings']['logo_upload']['#upload_validators'] = ['file_validate_extensions' => ['png gif jpg jpeg apng svg']];
  }

  // Upgrade path:
  // Move settings to new fields.
  if ($settings->getDefault('icon_default') === FALSE) {
    $form['logo']['default_logo']['#default_value'] = FALSE;
    $form['logo']['settings']['logo_path']['#default_value'] = $settings->getDefault('icon_path');
    $form['#submit'][] = '_gin_form_system_theme_settings_form_submit';
  }

  // Attach custom library.
  $form['#attached']['library'][] = 'gin/settings';
}

/**
 * Cleanup settings.
 */
function _gin_form_system_theme_settings_form_submit(&$form, FormStateInterface $form_state) {
  $config = \Drupal::configFactory()->getEditable('gin.settings');
  $config->clear('icon_path')
    ->clear('icon_default')
    ->save();
}