class ConfigConfigurator

final class ConfigConfigurator {
    public readonly ?string $recipeConfigDirectory;
    
    /**
     * @param array $config
     *   Config options for a recipe.
     * @param string $recipe_directory
     *   The path to the recipe.
     * @param \Drupal\Core\Config\StorageInterface $active_configuration
     *   The active configuration storage.
     */
    public function __construct(array $config, string $recipe_directory, StorageInterface $active_configuration) {
        $this->recipeConfigDirectory = is_dir($recipe_directory . '/config') ? $recipe_directory . '/config' : NULL;
        $recipe_storage = $this->getConfigStorage();
        foreach ($recipe_storage->listAll() as $config_name) {
            if ($active_data = $active_configuration->read($config_name)) {
                // @todo https://www.drupal.org/i/3439714 Investigate if there is any
                //   generic code in core for this.
                unset($active_data['uuid'], $active_data['_core']);
                if (empty($active_data['dependencies'])) {
                    unset($active_data['dependencies']);
                }
                $recipe_data = $recipe_storage->read($config_name);
                if (empty($recipe_data['dependencies'])) {
                    unset($recipe_data['dependencies']);
                }
                // Ensure we don't get a false mismatch due to differing key order.
                // @todo When https://www.drupal.org/project/drupal/issues/3230826 is
                //   fixed in core, use that API instead to sort the config data.
                self::recursiveSortByKey($active_data);
                self::recursiveSortByKey($recipe_data);
                if ($active_data !== $recipe_data) {
                    throw new RecipePreExistingConfigException($config_name, sprintf("The configuration '%s' exists already and does not match the recipe's configuration", $config_name));
                }
            }
        }
    }
    
    /**
     * Sorts an array recursively, by key, alphabetically.
     *
     * @param mixed[] $data
     *   The array to sort, passed by reference.
     *
     * @todo Remove when https://www.drupal.org/project/drupal/issues/3230826 is
     *   fixed in core.
     */
    private static function recursiveSortByKey(array &$data) : void {
        // If the array is a list, it is by definition already sorted.
        if (!array_is_list($data)) {
            ksort($data);
        }
        foreach ($data as &$value) {
            if (is_array($value)) {
                self::recursiveSortByKey($value);
            }
        }
    }
    
    /**
     * Gets a config storage object for reading config from the recipe.
     *
     * @return \Drupal\Core\Config\StorageInterface
     *   The  config storage object for reading config from the recipe.
     */
    public function getConfigStorage() : StorageInterface {
        $storages = [];
        if ($this->recipeConfigDirectory) {
            // Config provided by the recipe should take priority over config from
            // extensions.
            $storages[] = new FileStorage($this->recipeConfigDirectory);
        }
        if (!empty($this->config['import'])) {
            
            /** @var \Drupal\Core\Extension\ModuleExtensionList $module_list */
            $module_list = \Drupal::service('extension.list.module');
            
            /** @var \Drupal\Core\Extension\ThemeExtensionList $theme_list */
            $theme_list = \Drupal::service('extension.list.theme');
            foreach ($this->config['import'] as $extension => $config) {
                // If the recipe explicitly does not want to import any config from this
                // extension, skip it.
                if ($config === NULL) {
                    continue;
                }
                $path = match (TRUE) {    $module_list->exists($extension) => $module_list->getPath($extension),
                    $theme_list->exists($extension) => $theme_list->getPath($extension),
                    default => throw new \RuntimeException("{$extension} is not a theme or module"),
                
                };
                $config = $config === '*' ? [] : $config;
                $storages[] = new RecipeExtensionConfigStorage($path, $config);
            }
        }
        return RecipeConfigStorageWrapper::createStorageFromArray($storages);
    }
    
    /**
     * Determines if the recipe has any config or config actions to apply.
     *
     * @return bool
     *   TRUE if the recipe has any config or config actions to apply, FALSE if
     *   not.
     */
    public function hasTasks() : bool {
        return $this->recipeConfigDirectory !== NULL || count($this->config);
    }

}