<?php

/*
 * This file is part of Composer.
 *
 * (c) Nils Adermann <naderman@naderman.de>
 *     Jordi Boggiano <j.boggiano@seld.be>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Composer\Console;

use Symfony\Component\Console\Application as BaseApplication;
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\Output\ConsoleOutput;
use Symfony\Component\Console\Formatter\OutputFormatter;
use Composer\Command;
use Composer\Command\Helper\DialogHelper;
use Composer\Composer;
use Composer\Factory;
use Composer\IO\IOInterface;
use Composer\IO\ConsoleIO;
use Composer\Json\JsonValidationException;
use Composer\Util\ErrorHandler;

/**
 * The console application that handles the commands
 *
 * @author Ryan Weaver <ryan@knplabs.com>
 * @author Jordi Boggiano <j.boggiano@seld.be>
 * @author François Pluchino <francois.pluchino@opendisplay.com>
 */
class Application extends BaseApplication
{
    /**
     * @var Composer
     */
    protected $composer;

    /**
     * @var IOInterface
     */
    protected $io;

    private static $logo = '   ______
  / ____/___  ____ ___  ____  ____  ________  _____
 / /   / __ \/ __ `__ \/ __ \/ __ \/ ___/ _ \/ ___/
/ /___/ /_/ / / / / / / /_/ / /_/ (__  )  __/ /
\____/\____/_/ /_/ /_/ .___/\____/____/\___/_/
                    /_/
';

    public function __construct()
    {
        if (function_exists('ini_set') && extension_loaded('xdebug')) {
            ini_set('xdebug.show_exception_trace', false);
            ini_set('xdebug.scream', false);
        }

        if (function_exists('date_default_timezone_set') && function_exists('date_default_timezone_get')) {
            date_default_timezone_set(@date_default_timezone_get());
        }

        ErrorHandler::register();
        parent::__construct('Composer', Composer::VERSION);
    }

    /**
     * {@inheritDoc}
     */
    public function run(InputInterface $input = null, OutputInterface $output = null)
    {
        if (null === $output) {
            $styles = Factory::createAdditionalStyles();
            $formatter = new OutputFormatter(null, $styles);
            $output = new ConsoleOutput(ConsoleOutput::VERBOSITY_NORMAL, null, $formatter);
        }

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

    /**
     * {@inheritDoc}
     */
    public function doRun(InputInterface $input, OutputInterface $output)
    {
        $this->io = new ConsoleIO($input, $output, $this->getHelperSet());

        if (version_compare(PHP_VERSION, '5.3.2', '<')) {
            $this->getIO()->writeError('<warning>Composer only officially supports PHP 5.3.2 and above, you will most likely encounter problems with your PHP '.PHP_VERSION.', upgrading is strongly recommended.</warning>');
        }

        if (defined('COMPOSER_DEV_WARNING_TIME')) {
            $commandName = '';
            if ($name = $this->getCommandName($input)) {
                try {
                    $commandName = $this->find($name)->getName();
                } catch (\InvalidArgumentException $e) {
                }
            }
            if ($commandName !== 'self-update' && $commandName !== 'selfupdate') {
                if (time() > COMPOSER_DEV_WARNING_TIME) {
                    $this->getIO()->writeError(sprintf('<warning>Warning: This development build of composer is over 30 days old. It is recommended to update it by running "%s self-update" to get the latest version.</warning>', $_SERVER['PHP_SELF']));
                }
            }
        }

        if (getenv('COMPOSER_NO_INTERACTION')) {
            $input->setInteractive(false);
        }

        // switch working dir
        if ($newWorkDir = $this->getNewWorkingDir($input)) {
            $oldWorkingDir = getcwd();
            chdir($newWorkDir);
            if ($this->getIO()->isDebug() >= 4) {
                $this->getIO()->writeError('Changed CWD to ' . getcwd());
            }
        }

        // add non-standard scripts as own commands
        $file = Factory::getComposerFile();
        if (is_file($file) && is_readable($file) && is_array($composer = json_decode(file_get_contents($file), true))) {
            if (isset($composer['scripts']) && is_array($composer['scripts'])) {
                foreach ($composer['scripts'] as $script => $dummy) {
                    if (!defined('Composer\Script\ScriptEvents::'.str_replace('-', '_', strtoupper($script)))) {
                        if ($this->has($script)) {
                            $this->getIO()->writeError('<warning>A script named '.$script.' would override a native Composer function and has been skipped</warning>');
                        } else {
                            $this->add(new Command\ScriptAliasCommand($script));
                        }
                    }
                }
            }
        }

        if ($input->hasParameterOption('--profile')) {
            $startTime = microtime(true);
            $this->io->enableDebugging($startTime);
        }

        $result = parent::doRun($input, $output);

        if (isset($oldWorkingDir)) {
            chdir($oldWorkingDir);
        }

        if (isset($startTime)) {
            $this->getIO()->writeError('<info>Memory usage: '.round(memory_get_usage() / 1024 / 1024, 2).'MB (peak: '.round(memory_get_peak_usage() / 1024 / 1024, 2).'MB), time: '.round(microtime(true) - $startTime, 2).'s');
        }

        return $result;
    }

    /**
     * @param  InputInterface    $input
     * @return string
     * @throws \RuntimeException
     */
    private function getNewWorkingDir(InputInterface $input)
    {
        $workingDir = $input->getParameterOption(array('--working-dir', '-d'));
        if (false !== $workingDir && !is_dir($workingDir)) {
            throw new \RuntimeException('Invalid working directory specified.');
        }

        return $workingDir;
    }

    /**
     * {@inheritDoc}
     */
    public function renderException($exception, $output)
    {
        try {
            $composer = $this->getComposer(false, true);
            if ($composer) {
                $config = $composer->getConfig();

                $minSpaceFree = 1024*1024;
                if ((($df = @disk_free_space($dir = $config->get('home'))) !== false && $df < $minSpaceFree)
                    || (($df = @disk_free_space($dir = $config->get('vendor-dir'))) !== false && $df < $minSpaceFree)
                    || (($df = @disk_free_space($dir = sys_get_temp_dir())) !== false && $df < $minSpaceFree)
                ) {
                    $this->getIO()->writeError('<error>The disk hosting '.$dir.' is full, this may be the cause of the following exception</error>');
                }
            }
        } catch (\Exception $e) {
        }

        if (defined('PHP_WINDOWS_VERSION_BUILD') && false !== strpos($exception->getMessage(), 'The system cannot find the path specified')) {
            $this->getIO()->writeError('<error>The following exception may be caused by a stale entry in your cmd.exe AutoRun</error>');
            $this->getIO()->writeError('<error>Check https://getcomposer.org/doc/articles/troubleshooting.md#-the-system-cannot-find-the-path-specified-windows- for details</error>');
        }

        if (false !== strpos($exception->getMessage(), 'fork failed - Cannot allocate memory')) {
            $this->getIO()->writeError('<error>The following exception is caused by a lack of memory and not having swap configured</error>');
            $this->getIO()->writeError('<error>Check https://getcomposer.org/doc/articles/troubleshooting.md#proc-open-fork-failed-errors for details</error>');
        }

        if ($output instanceof ConsoleOutputInterface) {
            parent::renderException($exception, $output->getErrorOutput());
        } else {
            parent::renderException($exception, $output);
        }
    }

    /**
     * @param  bool                    $required
     * @param  bool                    $disablePlugins
     * @throws JsonValidationException
     * @return \Composer\Composer
     */
    public function getComposer($required = true, $disablePlugins = false)
    {
        if (null === $this->composer) {
            try {
                $this->composer = Factory::create($this->io, null, $disablePlugins);
            } catch (\InvalidArgumentException $e) {
                if ($required) {
                    $this->io->writeError($e->getMessage());
                    exit(1);
                }
            } catch (JsonValidationException $e) {
                $errors = ' - ' . implode(PHP_EOL . ' - ', $e->getErrors());
                $message = $e->getMessage() . ':' . PHP_EOL . $errors;
                throw new JsonValidationException($message);
            }
        }

        return $this->composer;
    }

    /**
     * Removes the cached composer instance
     */
    public function resetComposer()
    {
        $this->composer = null;
    }

    /**
     * @return IOInterface
     */
    public function getIO()
    {
        return $this->io;
    }

    public function getHelp()
    {
        return self::$logo . parent::getHelp();
    }

    /**
     * Initializes all the composer commands
     */
    protected function getDefaultCommands()
    {
        $commands = parent::getDefaultCommands();
        $commands[] = new Command\AboutCommand();
        $commands[] = new Command\ConfigCommand();
        $commands[] = new Command\DependsCommand();
        $commands[] = new Command\InitCommand();
        $commands[] = new Command\InstallCommand();
        $commands[] = new Command\CreateProjectCommand();
        $commands[] = new Command\UpdateCommand();
        $commands[] = new Command\SearchCommand();
        $commands[] = new Command\ValidateCommand();
        $commands[] = new Command\ShowCommand();
        $commands[] = new Command\RequireCommand();
        $commands[] = new Command\DumpAutoloadCommand();
        $commands[] = new Command\StatusCommand();
        $commands[] = new Command\ArchiveCommand();
        $commands[] = new Command\DiagnoseCommand();
        $commands[] = new Command\RunScriptCommand();
        $commands[] = new Command\LicensesCommand();
        $commands[] = new Command\GlobalCommand();
        $commands[] = new Command\ClearCacheCommand();
        $commands[] = new Command\RemoveCommand();
        $commands[] = new Command\HomeCommand();

        if ('phar:' === substr(__FILE__, 0, 5)) {
            $commands[] = new Command\SelfUpdateCommand();
        }

        return $commands;
    }

    /**
     * {@inheritDoc}
     */
    public function getLongVersion()
    {
        if (Composer::BRANCH_ALIAS_VERSION) {
            return sprintf(
                '<info>%s</info> version <comment>%s (%s)</comment> %s',
                $this->getName(),
                Composer::BRANCH_ALIAS_VERSION,
                $this->getVersion(),
                Composer::RELEASE_DATE
            );
        }

        return parent::getLongVersion() . ' ' . Composer::RELEASE_DATE;
    }

    /**
     * {@inheritDoc}
     */
    protected function getDefaultInputDefinition()
    {
        $definition = parent::getDefaultInputDefinition();
        $definition->addOption(new InputOption('--profile', null, InputOption::VALUE_NONE, 'Display timing and memory usage information'));
        $definition->addOption(new InputOption('--working-dir', '-d', InputOption::VALUE_REQUIRED, 'If specified, use the given directory as working directory.'));

        return $definition;
    }

    /**
     * {@inheritDoc}
     */
    protected function getDefaultHelperSet()
    {
        $helperSet = parent::getDefaultHelperSet();
        $helperSet->set(new DialogHelper());

        return $helperSet;
    }
}