class RecipeConfigurator

final class RecipeConfigurator {
    
    /**
     * @var \Drupal\Core\Recipe\Recipe[]
     */
    public readonly array $recipes;
    
    /**
     * @param string[] $recipes
     *   A list of recipes for a recipe to apply. The recipes will be applied in
     *   the order listed.
     * @param string $include_path
     *   The recipe's include path.
     */
    public function __construct(array $recipes, string $include_path) {
        $this->recipes = array_map(fn(string $name) => static::getIncludedRecipe($include_path, $name), $recipes);
    }
    
    /**
     * Gets an included recipe object.
     *
     * @param string $include_path
     *   The recipe's include path.
     * @param string $name
     *   The machine name of the recipe to get.
     *
     * @return \Drupal\Core\Recipe\Recipe
     *   The recipe object.
     *
     * @throws \Drupal\Core\Recipe\UnknownRecipeException
     *   Thrown when the recipe cannot be found.
     */
    public static function getIncludedRecipe(string $include_path, string $name) : Recipe {
        // In order to allow recipes to include core provided recipes, $name can be
        // a Drupal root relative path to a recipe folder. For example, a recipe can
        // include the core provided 'article_tags' recipe by listing the recipe as
        // 'core/recipes/article_tags'. It is strongly recommended not to rely on
        // relative paths for including recipes. Required recipes should be put in
        // the same parent directory as the recipe being applied. Note, only linux
        // style directory separators are supported. PHP on Windows can resolve the
        // mix of directory separators.
        if (str_contains($name, '/')) {
            $path = \Drupal::root() . "/{$name}/recipe.yml";
        }
        else {
            $path = $include_path . "/{$name}/recipe.yml";
        }
        if (file_exists($path)) {
            return Recipe::createFromDirectory(dirname($path));
        }
        $search_path = dirname($path, 2);
        throw new UnknownRecipeException($name, $search_path, sprintf("Can not find the %s recipe, search path: %s", $name, $search_path));
    }
    
    /**
     * Returns all the recipes installed by this recipe.
     *
     * @return \Drupal\Core\Recipe\Recipe[]
     *   An array of all the recipes being installed.
     */
    private function listAllRecipes() : array {
        $recipes = [];
        foreach ($this->recipes as $recipe) {
            $recipes[] = $recipe;
            $recipes = array_merge($recipes, $recipe->recipes
                ->listAllRecipes());
        }
        return array_values(array_unique($recipes, SORT_REGULAR));
    }
    
    /**
     * List all the extensions installed by this recipe and its dependencies.
     *
     * @return string[]
     *   All the modules and themes that will be installed by the current
     *   recipe and all the recipes it depends on.
     */
    public function listAllExtensions() : array {
        $extensions = [];
        foreach ($this->listAllRecipes() as $recipe) {
            $extensions = array_merge($extensions, $recipe->install->modules, $recipe->install->themes);
        }
        return array_values(array_unique($extensions));
    }

}