<?php

/*
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * This software consists of voluntary contributions made by many individuals
 * and is licensed under the LGPL. For more information, see
 * <http://www.doctrine-project.org>.
 */

namespace Doctrine\DBAL\Migrations\Tools\Console\Command;

use Symfony\Component\Console\Input\InputInterface,
 Symfony\Component\Console\Output\OutputInterface,
 Symfony\Component\Console\Input\InputArgument,
 Symfony\Component\Console\Input\InputOption,
 Doctrine\DBAL\Migrations\MigrationException,
 Doctrine\DBAL\Migrations\Configuration\Configuration;

/**
 * Command for generating new blank migration classes
 *
 * @license http://www.opensource.org/licenses/lgpl-license.php LGPL
 * @link    www.doctrine-project.org
 * @since   2.0
 * @author  Jonathan Wage <jonwage@gmail.com>
 */
class GenerateCommand extends AbstractCommand
{

    private static $_template =
            '<?php

namespace <namespace>;

use Doctrine\DBAL\Migrations\AbstractMigration,
    Doctrine\DBAL\Schema\Schema;

/**
 * Auto-generated Migration: Please modify to your need!
 */
class Version<version> extends AbstractMigration
{
    public function up(Schema $schema)
    {
        // this up() migration is autogenerated, please modify it to your needs
<up>
    }

    public function down(Schema $schema)
    {
        // this down() migration is autogenerated, please modify it to your needs
<down>
    }
}
';

    protected function configure()
    {
        $this
                ->setName('migrations:generate')
                ->setDescription('Generate a blank migration class.')
                ->addOption('editor-cmd', null, InputOption::VALUE_OPTIONAL, 'Open file with this command upon creation.')
                ->setHelp(<<<EOT
The <info>%command.name%</info> command generates a blank migration class:

    <info>%command.full_name%</info>

You can optionally specify a <comment>--editor-cmd</comment> option to open the generated file in your favorite editor:

    <info>%command.full_name% --editor-cmd=mate</info>
EOT
        );

        parent::configure();
    }

    public function execute(InputInterface $input, OutputInterface $output)
    {
        $configuration = $this->getMigrationConfiguration($input, $output);

        $version = date('YmdHis');
        $path = $this->generateMigration($configuration, $input, $version);

        $output->writeln(sprintf('Generated new migration class to "<info>%s</info>"', $path));
    }

    protected function generateMigration(Configuration $configuration, InputInterface $input, $version, $up = null, $down = null)
    {
        $placeHolders = array(
            '<namespace>',
            '<version>',
            '<up>',
            '<down>'
        );
        $replacements = array(
            $configuration->getMigrationsNamespace(),
            $version,
            $up ? "        " . implode("\n        ", explode("\n", $up)) : null,
            $down ? "        " . implode("\n        ", explode("\n", $down)) : null
        );
        $code = str_replace($placeHolders, $replacements, self::$_template);
        $dir = $configuration->getMigrationsDirectory();
        $dir = $dir ? $dir : getcwd();
        $dir = rtrim($dir, '/');
        $path = $dir . '/Version' . $version . '.php';

        if (!file_exists($dir)) {
            throw new \InvalidArgumentException(sprintf('Migrations directory "%s" does not exist.', $dir));
        }

        file_put_contents($path, $code);

        if ($editorCmd = $input->getOption('editor-cmd')) {
            shell_exec($editorCmd . ' ' . escapeshellarg($path));
        }

        return $path;
    }
}