<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Symfony\Bundle\FrameworkBundle\Console;

use Symfony\Component\Console\Application as BaseApplication;
use Symfony\Component\Console\Command\Command;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Input\InputOption;
use Symfony\Component\Console\Output\ConsoleOutputInterface;
use Symfony\Component\Console\Output\OutputInterface;
use Symfony\Component\Console\Style\SymfonyStyle;
use Symfony\Component\Debug\Exception\FatalThrowableError;
use Symfony\Component\DependencyInjection\ContainerAwareInterface;
use Symfony\Component\HttpKernel\Bundle\Bundle;
use Symfony\Component\HttpKernel\Kernel;
use Symfony\Component\HttpKernel\KernelInterface;

/**
 * @author Fabien Potencier <fabien@symfony.com>
 */
class Application extends BaseApplication
{
    private $kernel;
    private $commandsRegistered = false;
    private $registrationErrors = [];

    public function __construct(KernelInterface $kernel)
    {
        $this->kernel = $kernel;

        parent::__construct('Symfony', Kernel::VERSION);

        $inputDefinition = $this->getDefinition();
        $inputDefinition->addOption(new InputOption('--env', '-e', InputOption::VALUE_REQUIRED, 'The Environment name.', $kernel->getEnvironment()));
        $inputDefinition->addOption(new InputOption('--no-debug', null, InputOption::VALUE_NONE, 'Switches off debug mode.'));
    }

    /**
     * Gets the Kernel associated with this Console.
     *
     * @return KernelInterface A KernelInterface instance
     */
    public function getKernel()
    {
        return $this->kernel;
    }

    /**
     * Runs the current application.
     *
     * @return int 0 if everything went fine, or an error code
     */
    public function doRun(InputInterface $input, OutputInterface $output)
    {
        $this->kernel->boot();

        $this->setDispatcher($this->kernel->getContainer()->get('event_dispatcher'));

        $this->registerCommands();

        if ($this->registrationErrors) {
            $this->renderRegistrationErrors($input, $output);
        }

        return parent::doRun($input, $output);
    }

    /**
     * {@inheritdoc}
     */
    protected function doRunCommand(Command $command, InputInterface $input, OutputInterface $output)
    {
        if ($this->registrationErrors) {
            $this->renderRegistrationErrors($input, $output);
        }

        return parent::doRunCommand($command, $input, $output);
    }

    /**
     * {@inheritdoc}
     */
    public function find($name)
    {
        $this->registerCommands();

        return parent::find($name);
    }

    /**
     * {@inheritdoc}
     */
    public function get($name)
    {
        $this->registerCommands();

        $command = parent::get($name);

        if ($command instanceof ContainerAwareInterface) {
            $command->setContainer($this->kernel->getContainer());
        }

        return $command;
    }

    /**
     * {@inheritdoc}
     */
    public function all($namespace = null)
    {
        $this->registerCommands();

        return parent::all($namespace);
    }

    /**
     * {@inheritdoc}
     */
    public function getLongVersion()
    {
        return parent::getLongVersion().sprintf(' (kernel: <comment>%s</>, env: <comment>%s</>, debug: <comment>%s</>)', $this->kernel->getName(), $this->kernel->getEnvironment(), $this->kernel->isDebug() ? 'true' : 'false');
    }

    public function add(Command $command)
    {
        $this->registerCommands();

        return parent::add($command);
    }

    protected function registerCommands()
    {
        if ($this->commandsRegistered) {
            return;
        }

        $this->commandsRegistered = true;

        $this->kernel->boot();

        $container = $this->kernel->getContainer();

        foreach ($this->kernel->getBundles() as $bundle) {
            if ($bundle instanceof Bundle) {
                try {
                    $bundle->registerCommands($this);
                } catch (\Exception $e) {
                    $this->registrationErrors[] = $e;
                } catch (\Throwable $e) {
                    $this->registrationErrors[] = new FatalThrowableError($e);
                }
            }
        }

        if ($container->has('console.command_loader')) {
            $this->setCommandLoader($container->get('console.command_loader'));
        }

        if ($container->hasParameter('console.command.ids')) {
            $lazyCommandIds = $container->hasParameter('console.lazy_command.ids') ? $container->getParameter('console.lazy_command.ids') : [];
            foreach ($container->getParameter('console.command.ids') as $id) {
                if (!isset($lazyCommandIds[$id])) {
                    try {
                        $this->add($container->get($id));
                    } catch (\Exception $e) {
                        $this->registrationErrors[] = $e;
                    } catch (\Throwable $e) {
                        $this->registrationErrors[] = new FatalThrowableError($e);
                    }
                }
            }
        }
    }

    private function renderRegistrationErrors(InputInterface $input, OutputInterface $output)
    {
        if ($output instanceof ConsoleOutputInterface) {
            $output = $output->getErrorOutput();
        }

        (new SymfonyStyle($input, $output))->warning('Some commands could not be registered:');

        foreach ($this->registrationErrors as $error) {
            $this->doRenderException($error, $output);
        }

        $this->registrationErrors = [];
    }
}
