<?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\Component\Console\Descriptor;

use Symfony\Component\Console\Application;
use Symfony\Component\Console\Command\Command;
use Symfony\Component\Console\Input\InputArgument;
use Symfony\Component\Console\Input\InputDefinition;
use Symfony\Component\Console\Input\InputOption;
use Symfony\Component\Console\Output\OutputInterface;
use Symfony\Component\Console\Exception\InvalidArgumentException;

/**
* @author Jean-François Simon <jeanfrancois.simon@sensiolabs.com>
*
* @internal
*/
abstract class Descriptor implements DescriptorInterface
{
/**
* @var OutputInterface
*/
protected $output;

/**
* {@inheritdoc}
*/
public function describe(OutputInterface $output, $object, array $options = array())
{
$this->output = $output;

switch (true) {
case $object instanceof InputArgument:
$this->describeInputArgument($object, $options);
break;
case $object instanceof InputOption:
$this->describeInputOption($object, $options);
break;
case $object instanceof InputDefinition:
$this->describeInputDefinition($object, $options);
break;
case $object instanceof Command:
$this->describeCommand($object, $options);
break;
case $object instanceof Application:
$this->describeApplication($object, $options);
break;
default:
throw new InvalidArgumentException(sprintf('Object of type "%s" is not describable.', get_class($object)));
}
}

/**
* Writes content to output.
*
* @param string $content
* @param bool $decorated
*/
protected function write($content, $decorated = false)
{
$this->output->write($content, false, $decorated ? OutputInterface::OUTPUT_NORMAL : OutputInterface::OUTPUT_RAW);
}

/**
* Describes an InputArgument instance.
*
* @return string|mixed
*/
abstract protected function describeInputArgument(InputArgument $argument, array $options = array());

/**
* Describes an InputOption instance.
*
* @return string|mixed
*/
abstract protected function describeInputOption(InputOption $option, array $options = array());

/**
* Describes an InputDefinition instance.
*
* @return string|mixed
*/
abstract protected function describeInputDefinition(InputDefinition $definition, array $options = array());

/**
* Describes a Command instance.
*
* @return string|mixed
*/
abstract protected function describeCommand(Command $command, array $options = array());

/**
* Describes an Application instance.
*
* @return string|mixed
*/
abstract protected function describeApplication(Application $application, array $options = array());
}