class RecipeRunner

final class RecipeRunner {
    
    /**
     * @param \Drupal\Core\Recipe\Recipe $recipe
     *   The recipe to apply.
     */
    public static function processRecipe(Recipe $recipe) : void {
        static::processRecipes($recipe->recipes);
        static::processInstall($recipe->install, $recipe->config
            ->getConfigStorage());
        static::processConfiguration($recipe->config);
        static::processContent($recipe->content);
        static::triggerEvent($recipe);
    }
    
    /**
     * Triggers the RecipeAppliedEvent.
     *
     * @param \Drupal\Core\Recipe\Recipe $recipe
     *   The recipe to apply.
     * @param array<mixed>|null $context
     *   The batch context if called by a batch.
     */
    public static function triggerEvent(Recipe $recipe, ?array &$context = NULL) : void {
        $event = new RecipeAppliedEvent($recipe);
        \Drupal::service(EventDispatcherInterface::class)->dispatch($event);
        $context['message'] = t('Applied %recipe recipe.', [
            '%recipe' => $recipe->name,
        ]);
        $context['results']['recipe'][] = $recipe->name;
    }
    
    /**
     * Applies any recipes listed by the recipe.
     *
     * @param \Drupal\Core\Recipe\RecipeConfigurator $recipes
     *   The list of recipes to apply.
     */
    protected static function processRecipes(RecipeConfigurator $recipes) : void {
        foreach ($recipes->recipes as $recipe) {
            static::processRecipe($recipe);
        }
    }
    
    /**
     * Installs the extensions.
     *
     * @param \Drupal\Core\Recipe\InstallConfigurator $install
     *   The list of extensions to install.
     * @param \Drupal\Core\Config\StorageInterface $recipeConfigStorage
     *   The recipe's configuration storage. Used to override extension provided
     *   configuration.
     */
    protected static function processInstall(InstallConfigurator $install, StorageInterface $recipeConfigStorage) : void {
        foreach ($install->modules as $name) {
            static::installModule($name, $recipeConfigStorage);
        }
        // Themes can depend on modules so have to be installed after modules.
        foreach ($install->themes as $name) {
            static::installTheme($name, $recipeConfigStorage);
        }
    }
    
    /**
     * Creates configuration and applies configuration actions.
     *
     * @param \Drupal\Core\Recipe\ConfigConfigurator $config
     *   The config configurator from the recipe.
     */
    protected static function processConfiguration(ConfigConfigurator $config) : void {
        $config_installer = new RecipeConfigInstaller(\Drupal::service('config.factory'), \Drupal::service('config.storage'), \Drupal::service('config.typed'), \Drupal::service('config.manager'), \Drupal::service('event_dispatcher'), NULL, \Drupal::service('extension.path.resolver'));
        // Create configuration that is either supplied by the recipe or listed in
        // the config.import section that does not exist.
        $config_installer->installRecipeConfig($config);
        if (!empty($config->config['actions'])) {
            // Process the actions.
            
            /** @var \Drupal\Core\Config\Action\ConfigActionManager $config_action_manager */
            $config_action_manager = \Drupal::service('plugin.manager.config_action');
            foreach ($config->config['actions'] as $config_name => $actions) {
                foreach ($actions as $action_id => $data) {
                    $config_action_manager->applyAction($action_id, $config_name, $data);
                }
            }
        }
    }
    
    /**
     * Creates content contained in a recipe.
     *
     * @param \Drupal\Core\DefaultContent\Finder $content
     *   The content finder object for the recipe.
     */
    protected static function processContent(Finder $content) : void {
        
        /** @var \Drupal\Core\DefaultContent\Importer $importer */
        $importer = \Drupal::service(Importer::class);
        $importer->setLogger(\Drupal::logger('recipe'));
        $importer->importContent($content, Existing::Skip);
    }
    
    /**
     * Converts a recipe into a series of batch operations.
     *
     * @param \Drupal\Core\Recipe\Recipe $recipe
     *   The recipe to convert to batch operations.
     *
     * @return array<int, array{0: callable, 1: array{mixed}}>
     *   The array of batch operations. Each value is an array with two values.
     *   The first value is a callable and the second value are the arguments to
     *   pass to the callable.
     *
     * @see \Drupal\Core\Batch\BatchBuilder::addOperation()
     */
    public static function toBatchOperations(Recipe $recipe) : array {
        $modules = [];
        $themes = [];
        $recipes = [];
        return static::toBatchOperationsRecipe($recipe, $recipes, $modules, $themes);
    }
    
    /**
     * Helper method to convert a recipe to batch operations.
     *
     * @param \Drupal\Core\Recipe\Recipe $recipe
     *   The recipe to convert to batch operations.
     * @param string[] $recipes
     *   The paths of the recipes that have already been converted to batch operations.
     * @param string[] $modules
     *   The modules that will already be installed due to previous recipes in the
     *   batch.
     * @param string[] $themes
     *   The themes that will already be installed due to previous recipes in the
     *   batch.
     *
     * @return array<int, array{0: callable, 1: array{mixed}}>
     *   The array of batch operations. Each value is an array with two values.
     *   The first value is a callable and the second value are the arguments to
     *   pass to the callable.
     */
    protected static function toBatchOperationsRecipe(Recipe $recipe, array $recipes, array &$modules, array &$themes) : array {
        if (in_array($recipe->path, $recipes, TRUE)) {
            return [];
        }
        $steps = [];
        $recipes[] = $recipe->path;
        foreach ($recipe->recipes->recipes as $sub_recipe) {
            $steps = array_merge($steps, static::toBatchOperationsRecipe($sub_recipe, $recipes, $modules, $themes));
        }
        $steps = array_merge($steps, static::toBatchOperationsInstall($recipe, $modules, $themes));
        if ($recipe->config
            ->hasTasks()) {
            $steps[] = [
                [
                    RecipeRunner::class,
                    'installConfig',
                ],
                [
                    $recipe,
                ],
            ];
        }
        if (!empty($recipe->content->data)) {
            $steps[] = [
                [
                    RecipeRunner::class,
                    'installContent',
                ],
                [
                    $recipe,
                ],
            ];
        }
        $steps[] = [
            [
                RecipeRunner::class,
                'triggerEvent',
            ],
            [
                $recipe,
            ],
        ];
        return $steps;
    }
    
    /**
     * Converts a recipe's install tasks to batch operations.
     *
     * @param \Drupal\Core\Recipe\Recipe $recipe
     *   The recipe to convert install tasks to batch operations.
     * @param string[] $modules
     *   The modules that will already be installed due to previous recipes in the
     *   batch.
     * @param string[] $themes
     *   The themes that will already be installed due to previous recipes in the
     *   batch.
     *
     * @return array<int, array{0: callable, 1: array{mixed}}>
     *   The array of batch operations. Each value is an array with two values.
     *   The first value is a callable and the second value are the arguments to
     *   pass to the callable.
     */
    protected static function toBatchOperationsInstall(Recipe $recipe, array &$modules, array &$themes) : array {
        foreach ($recipe->install->modules as $name) {
            if (in_array($name, $modules, TRUE)) {
                continue;
            }
            $modules[] = $name;
            $steps[] = [
                [
                    RecipeRunner::class,
                    'installModule',
                ],
                [
                    $name,
                    $recipe,
                ],
            ];
        }
        foreach ($recipe->install->themes as $name) {
            if (in_array($name, $themes, TRUE)) {
                continue;
            }
            $themes[] = $name;
            $steps[] = [
                [
                    RecipeRunner::class,
                    'installTheme',
                ],
                [
                    $name,
                    $recipe,
                ],
            ];
        }
        return $steps ?? [];
    }
    
    /**
     * Installs a module for a recipe.
     *
     * @param string $module
     *   The name of the module to install.
     * @param \Drupal\Core\Config\StorageInterface|\Drupal\Core\Recipe\Recipe $recipeConfigStorage
     *   The recipe or recipe's config storage.
     * @param array<mixed>|null $context
     *   The batch context if called by a batch.
     */
    public static function installModule(string $module, StorageInterface|Recipe $recipeConfigStorage, ?array &$context = NULL) : void {
        if ($recipeConfigStorage instanceof Recipe) {
            $recipeConfigStorage = $recipeConfigStorage->config
                ->getConfigStorage();
        }
        // Disable configuration entity install but use the config directory from
        // the module.
        \Drupal::service('config.installer')->setSyncing(TRUE);
        $default_install_path = \Drupal::service('extension.list.module')->get($module)
            ->getPath() . '/' . InstallStorage::CONFIG_INSTALL_DIRECTORY;
        // Allow the recipe to override simple configuration from the module.
        $storage = new RecipeOverrideConfigStorage($recipeConfigStorage, new FileStorage($default_install_path, StorageInterface::DEFAULT_COLLECTION));
        \Drupal::service('config.installer')->setSourceStorage($storage);
        \Drupal::service('module_installer')->install([
            $module,
        ]);
        \Drupal::service('config.installer')->setSyncing(FALSE);
        $context['message'] = t('Installed %module module.', [
            '%module' => \Drupal::service('extension.list.module')->getName($module),
        ]);
        $context['results']['module'][] = $module;
    }
    
    /**
     * Installs a theme for a recipe.
     *
     * @param string $theme
     *   The name of the theme to install.
     * @param \Drupal\Core\Config\StorageInterface|\Drupal\Core\Recipe\Recipe $recipeConfigStorage
     *   The recipe or recipe's config storage.
     * @param array<mixed>|null $context
     *   The batch context if called by a batch.
     */
    public static function installTheme(string $theme, StorageInterface|Recipe $recipeConfigStorage, ?array &$context = NULL) : void {
        if ($recipeConfigStorage instanceof Recipe) {
            $recipeConfigStorage = $recipeConfigStorage->config
                ->getConfigStorage();
        }
        // Disable configuration entity install.
        \Drupal::service('config.installer')->setSyncing(TRUE);
        $default_install_path = \Drupal::service('extension.list.theme')->get($theme)
            ->getPath() . '/' . InstallStorage::CONFIG_INSTALL_DIRECTORY;
        // Allow the recipe to override simple configuration from the theme.
        $storage = new RecipeOverrideConfigStorage($recipeConfigStorage, new FileStorage($default_install_path, StorageInterface::DEFAULT_COLLECTION));
        \Drupal::service('config.installer')->setSourceStorage($storage);
        \Drupal::service('theme_installer')->install([
            $theme,
        ]);
        \Drupal::service('config.installer')->setSyncing(FALSE);
        $context['message'] = t('Installed %theme theme.', [
            '%theme' => \Drupal::service('extension.list.theme')->getName($theme),
        ]);
        $context['results']['theme'][] = $theme;
    }
    
    /**
     * Installs a config for a recipe.
     *
     * @param \Drupal\Core\Recipe\Recipe $recipe
     *   The recipe to install config for.
     * @param array<mixed>|null $context
     *   The batch context if called by a batch.
     */
    public static function installConfig(Recipe $recipe, ?array &$context = NULL) : void {
        static::processConfiguration($recipe->config);
        $context['message'] = t('Installed configuration for %recipe recipe.', [
            '%recipe' => $recipe->name,
        ]);
        $context['results']['config'][] = $recipe->name;
    }
    
    /**
     * Installs a content for a recipe.
     *
     * @param \Drupal\Core\Recipe\Recipe $recipe
     *   The recipe to install content for.
     * @param array<mixed>|null $context
     *   The batch context if called by a batch.
     */
    public static function installContent(Recipe $recipe, ?array &$context = NULL) : void {
        static::processContent($recipe->content);
        $context['message'] = t('Created content for %recipe recipe.', [
            '%recipe' => $recipe->name,
        ]);
        $context['results']['content'][] = $recipe->name;
    }

}