class DevelCommands

final class DevelCommands extends DrushCommands {
    use AutowireTrait;
    use ExecTrait;
    const REINSTALL = 'devel:reinstall';
    const HOOK = 'devel:hook';
    const EVENT = 'devel:event';
    const TOKEN = 'devel:token';
    const UUID = 'devel:uuid';
    const SERVICES = 'devel:services';
    
    /**
     * Constructs a new DevelCommands object.
     */
    public function __construct(Token $token, EventDispatcherInterface $eventDispatcher, ModuleHandlerInterface $moduleHandler, SiteAliasManagerInterface $siteAliasManager) {
        parent::__construct();
    }
    
    /**
     * Gets the module handler.
     *
     * @return \Drupal\Core\Extension\ModuleHandlerInterface
     *   The moduleHandler.
     */
    public function getModuleHandler() : ModuleHandlerInterface {
        return $this->moduleHandler;
    }
    
    /**
     * Gets the event dispatcher.
     *
     * @return \Symfony\Contracts\EventDispatcher\EventDispatcherInterface
     *   The eventDispatcher.
     */
    public function getEventDispatcher() : EventDispatcherInterface {
        return $this->eventDispatcher;
    }
    
    /**
     * Gets the container.
     *
     * @return \Drupal\Component\DependencyInjection\ContainerInterface
     *   The container.
     */
    public function getContainer() : ContainerInterface {
        return Drush::getContainer()->get('service_container');
    }
    
    /**
     * Gets the token.
     *
     * @return \Drupal\Core\Utility\Token
     *   The token.
     */
    public function getToken() : Token {
        return $this->token;
    }
    
    /**
     * Uninstall, and Install modules.
     */
    public function reinstall($modules) : void {
        
        /** @var \Drush\SiteAlias\ProcessManager $process_manager */
        $process_manager = $this->processManager();
        $modules = StringUtils::csvToArray($modules);
        $modules_str = implode(',', $modules);
        $process = $process_manager->drush($this->siteAliasManager
            ->getSelf(), PmCommands::UNINSTALL, [
            $modules_str,
        ]);
        $process->mustRun();
        $process = $process_manager->drush($this->siteAliasManager
            ->getSelf(), PmCommands::INSTALL, [
            $modules_str,
        ]);
        $process->mustRun();
    }
    
    /**
     * List implementations of a given hook and optionally edit one.
     */
    public function hook(string $hook, string $implementation) : void {
        // Get implementations in the .install files as well.
        include_once DRUPAL_ROOT . '/core/includes/install.inc';
        drupal_load_updates();
        $info = $this->codeLocate($implementation . ('_' . $hook));
        $exec = self::getEditor('');
        $cmd = sprintf($exec, Escape::shellArg($info['file']));
        $process = $this->processManager()
            ->shell($cmd);
        $process->setTty(TRUE);
        $process->mustRun();
    }
    
    /**
     * Asks the user to select a hook implementation.
     */
    public function hookInteract(Input $input, Output $output) : void {
        $hook_implementations = [];
        if (!$input->getArgument('implementation')) {
            foreach (array_keys($this->moduleHandler
                ->getModuleList()) as $key) {
                if ($this->moduleHandler
                    ->hasImplementations($input->getArgument('hook'), [
                    $key,
                ])) {
                    $hook_implementations[] = $key;
                }
            }
            if ($hook_implementations !== []) {
                if (!($choice = $this->io()
                    ->select('Enter the number of the hook implementation you wish to view.', array_combine($hook_implementations, $hook_implementations)))) {
                    throw new UserAbortException();
                }
                $input->setArgument('implementation', $choice);
            }
            else {
                throw new \Exception(dt('No implementations'));
            }
        }
    }
    
    /**
     * List implementations of a given event and optionally edit one.
     */
    public function event($event, $implementation) : void {
        $info = $this->codeLocate($implementation);
        $exec = self::getEditor('');
        $cmd = sprintf($exec, Escape::shellArg($info['file']));
        $process = $this->processManager()
            ->shell($cmd);
        $process->setTty(TRUE);
        $process->mustRun();
    }
    
    /**
     * Asks the user to select an event and the event's implementation.
     */
    public function interactEvent(Input $input, Output $output) : void {
        $event = $input->getArgument('event');
        if (!$event) {
            // @todo Expand this list.
            $events = [
                'kernel.controller',
                'kernel.exception',
                'kernel.request',
                'kernel.response',
                'kernel.terminate',
                'kernel.view',
            ];
            $events = array_combine($events, $events);
            if (!($event = $this->io()
                ->select('Enter the event you wish to explore.', $events))) {
                throw new UserAbortException();
            }
            $input->setArgument('event', $event);
        }
        
        /** @var \Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher $event_dispatcher */
        $event_dispatcher = $this->eventDispatcher;
        if ($implementations = $event_dispatcher->getListeners($event)) {
            $choices = [];
            foreach ($implementations as $implementation) {
                $callable = $implementation[0]::class . '::' . $implementation[1];
                $choices[$callable] = $callable;
            }
            if (!($choice = $this->io()
                ->select('Enter the number of the implementation you wish to view.', $choices))) {
                throw new UserAbortException();
            }
            $input->setArgument('implementation', $choice);
        }
        else {
            throw new \Exception(dt('No implementations.'));
        }
    }
    
    /**
     * List available tokens.
     */
    public function token($options = [
        'format' => 'table',
    ]) : RowsOfFields {
        $rows = [];
        $all = $this->token
            ->getInfo();
        foreach ($all['tokens'] as $group => $tokens) {
            foreach ($tokens as $key => $token) {
                $rows[] = [
                    'group' => $group,
                    'token' => $key,
                    'name' => $token['name'],
                ];
            }
        }
        return new RowsOfFields($rows);
    }
    
    /**
     * Generate a Universally Unique Identifier (UUID).
     */
    public function uuid() : string {
        $uuid = new Php();
        return $uuid->generate();
    }
    
    /**
     * Get source code line for specified function or method.
     */
    public function codeLocate($function_name) : array {
        // Get implementations in the .install files as well.
        include_once DRUPAL_ROOT . '/core/includes/install.inc';
        drupal_load_updates();
        if (!str_contains($function_name, '::')) {
            if (!function_exists($function_name)) {
                throw new \Exception(dt('Function not found'));
            }
            $reflect = new \ReflectionFunction($function_name);
        }
        else {
            [
                $class,
                $method,
            ] = explode('::', $function_name);
            if (!method_exists($class, $method)) {
                throw new \Exception(dt('Method not found'));
            }
            $reflect = new \ReflectionMethod($class, $method);
        }
        return [
            'file' => $reflect->getFileName(),
            'startline' => $reflect->getStartLine(),
            'endline' => $reflect->getEndLine(),
        ];
    }
    
    /**
     * Get a list of available container services.
     */
    public function services($prefix = NULL, array $options = [
        'format' => 'yaml',
    ]) : array {
        $container = $this->getContainer();
        $services = $container->getServiceIds();
        // If there is a prefix, try to find matches.
        if (isset($prefix)) {
            $services = preg_grep(sprintf('/%s/', $prefix), $services);
        }
        if (empty($services)) {
            throw new \Exception(dt('No container services found.'));
        }
        sort($services);
        return $services;
    }

}