class RecipeCommand

final class RecipeCommand extends Command {
    
    /**
     * The class loader.
     *
     * @var object
     */
    protected $classLoader;
    
    /**
     * Constructs a new RecipeCommand command.
     *
     * @param object $class_loader
     *   The class loader.
     */
    public function __construct($class_loader) {
        parent::__construct('recipe');
        $this->classLoader = $class_loader;
    }
    
    /**
     * {@inheritdoc}
     */
    protected function configure() : void {
        $this->setDescription('Applies a recipe to a site.')
            ->addArgument('path', InputArgument::REQUIRED, 'The path to the recipe\'s folder to apply');
    }
    
    /**
     * {@inheritdoc}
     */
    protected function execute(InputInterface $input, OutputInterface $output) : int {
        $io = new SymfonyStyle($input, $output);
        $recipe_path = $input->getArgument('path');
        if (!is_string($recipe_path) || !is_dir($recipe_path)) {
            $io->error(sprintf('The supplied path %s is not a directory', $recipe_path));
            return 1;
        }
        // Recipes can only be applied to an already-installed site.
        $container = $this->boot()
            ->getContainer();
        
        /** @var \Drupal\Core\Config\Checkpoint\CheckpointStorageInterface $checkpoint_storage */
        $checkpoint_storage = $container->get('config.storage.checkpoint');
        $recipe = Recipe::createFromDirectory($recipe_path);
        if ($checkpoint_storage instanceof LoggerAwareInterface) {
            $logger = new ConsoleLogger($output, [
                // The checkpoint storage logs a notice if it decides to not create a
                // checkpoint, and we want to be sure those notices are seen even
                // without additional verbosity.
LogLevel::NOTICE => OutputInterface::VERBOSITY_NORMAL,
            ]);
            $checkpoint_storage->setLogger($logger);
        }
        $backup_checkpoint = $checkpoint_storage->checkpoint("Backup before the '{$recipe->name}' recipe.");
        try {
            $steps = RecipeRunner::toBatchOperations($recipe);
            $progress_bar = $io->createProgressBar();
            $progress_bar->setFormat("%current%/%max% [%bar%]\n%message%\n");
            $progress_bar->setMessage($this->toPlainString(t('Applying recipe')));
            $progress_bar->start(count($steps));
            
            /** @var array{message?: \Stringable|string, results: array{module?: string[], theme?: string[], content?: string[], recipe?: string[]}} $context */
            $context = [
                'results' => [],
            ];
            foreach ($steps as $step) {
                call_user_func_array($step[0], array_merge($step[1], [
                    &$context,
                ]));
                if (isset($context['message'])) {
                    $progress_bar->setMessage($this->toPlainString($context['message']));
                }
                unset($context['message']);
                $progress_bar->advance();
            }
            if ($io->isVerbose()) {
                if (!empty($context['results']['module'])) {
                    $io->section($this->toPlainString(t('Modules installed')));
                    $modules = array_map(fn($module) => \Drupal::service('extension.list.module')->getName($module), $context['results']['module']);
                    sort($modules, SORT_NATURAL);
                    $io->listing($modules);
                }
                if (!empty($context['results']['theme'])) {
                    $io->section($this->toPlainString(t('Themes installed')));
                    $themes = array_map(fn($theme) => \Drupal::service('extension.list.theme')->getName($theme), $context['results']['theme']);
                    sort($themes, SORT_NATURAL);
                    $io->listing($themes);
                }
                if (!empty($context['results']['content'])) {
                    $io->section($this->toPlainString(t('Content created for recipes')));
                    $io->listing($context['results']['content']);
                }
                if (!empty($context['results']['recipe'])) {
                    $io->section($this->toPlainString(t('Recipes applied')));
                    $io->listing($context['results']['recipe']);
                }
            }
            $io->success($this->toPlainString(t('%recipe applied successfully', [
                '%recipe' => $recipe->name,
            ])));
            return 0;
        } catch (\Throwable $e) {
            try {
                $this->rollBackToCheckpoint($backup_checkpoint);
            } catch (ConfigImporterException $importer_exception) {
                $io->error($importer_exception->getMessage());
            }
            throw $e;
        }
    }
    
    /**
     * Converts a stringable like TranslatableMarkup to a plain text string.
     *
     * @param \Stringable|string $text
     *   The string to convert.
     *
     * @return string
     *   The plain text string.
     */
    private function toPlainString(\Stringable|string $text) : string {
        return PlainTextOutput::renderFromHtml((string) $text);
    }
    
    /**
     * Rolls config back to a particular checkpoint.
     *
     * @param \Drupal\Core\Config\Checkpoint\Checkpoint $checkpoint
     *   The checkpoint to roll back to.
     */
    private function rollBackToCheckpoint(Checkpoint $checkpoint) : void {
        $container = \Drupal::getContainer();
        
        /** @var \Drupal\Core\Config\Checkpoint\CheckpointStorageInterface $checkpoint_storage */
        $checkpoint_storage = $container->get('config.storage.checkpoint');
        $checkpoint_storage->setCheckpointToReadFrom($checkpoint);
        $storage_comparer = new StorageComparer($checkpoint_storage, $container->get('config.storage'));
        $storage_comparer->reset();
        $config_importer = new ConfigImporter($storage_comparer, $container->get('event_dispatcher'), $container->get('config.manager'), $container->get('lock'), $container->get('config.typed'), $container->get('module_handler'), $container->get('module_installer'), $container->get('theme_handler'), $container->get('string_translation'), $container->get('extension.list.module'), $container->get('extension.list.theme'));
        $config_importer->import();
    }
    
    /**
     * Boots up a Drupal environment.
     *
     * @return \Drupal\Core\DrupalKernelInterface
     *   The Drupal kernel.
     *
     * @throws \Exception
     *   Exception thrown if kernel does not boot.
     */
    protected function boot() {
        $kernel = new DrupalKernel('prod', $this->classLoader);
        $kernel::bootEnvironment();
        $kernel->setSitePath($this->getSitePath());
        Settings::initialize($kernel->getAppRoot(), $kernel->getSitePath(), $this->classLoader);
        $kernel->boot();
        $kernel->preHandle(Request::createFromGlobals());
        return $kernel;
    }
    
    /**
     * Gets the site path.
     *
     * Defaults to 'sites/default'. For testing purposes this can be overridden
     * using the DRUPAL_DEV_SITE_PATH environment variable.
     *
     * @return string
     *   The site path to use.
     */
    protected function getSitePath() {
        return getenv('DRUPAL_DEV_SITE_PATH') ?: 'sites/default';
    }

}