<?php
/**
 * @copyright Copyright (c) 2017 Joas Schilling <coding@schilljs.com>
 * @copyright Copyright (c) 2017, ownCloud GmbH
 *
 * @author Christoph Wurst <christoph@winzerhof-wurst.at>
 * @author Joas Schilling <coding@schilljs.com>
 *
 * @license AGPL-3.0
 *
 * This code is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License, version 3,
 * as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License, version 3,
 * along with this program. If not, see <http://www.gnu.org/licenses/>
 *
 */
namespace OC\Core\Command\Db\Migrations;

use OC\DB\Connection;
use OC\DB\MigrationService;
use OC\Migration\ConsoleOutput;
use OCP\IConfig;
use Stecman\Component\Symfony\Console\BashCompletion\Completion\CompletionAwareInterface;
use Stecman\Component\Symfony\Console\BashCompletion\CompletionContext;
use Symfony\Component\Console\Command\Command;
use Symfony\Component\Console\Input\InputArgument;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Output\OutputInterface;

class ExecuteCommand extends Command implements CompletionAwareInterface {

	/** @var Connection */
	private $connection;

	/** @var IConfig */
	private $config;

	/**
	 * ExecuteCommand constructor.
	 *
	 * @param Connection $connection
	 * @param IConfig $config
	 */
	public function __construct(Connection $connection, IConfig $config) {
		$this->connection = $connection;
		$this->config = $config;

		parent::__construct();
	}

	protected function configure() {
		$this
			->setName('migrations:execute')
			->setDescription('Execute a single migration version manually.')
			->addArgument('app', InputArgument::REQUIRED, 'Name of the app this migration command shall work on')
			->addArgument('version', InputArgument::REQUIRED, 'The version to execute.', null);

		parent::configure();
	}

	/**
	 * @param InputInterface $input
	 * @param OutputInterface $output
	 * @return int
	 */
	public function execute(InputInterface $input, OutputInterface $output): int {
		$appName = $input->getArgument('app');
		$ms = new MigrationService($appName, $this->connection, new ConsoleOutput($output));
		$version = $input->getArgument('version');

		if ($this->config->getSystemValue('debug', false) === false) {
			$olderVersions = $ms->getMigratedVersions();
			$olderVersions[] = '0';
			$olderVersions[] = 'prev';
			if (in_array($version, $olderVersions, true)) {
				$output->writeln('<error>Can not go back to previous migration without debug enabled</error>');
				return 1;
			}
		}


		$ms->executeStep($version);
		return 0;
	}

	/**
	 * @param string $optionName
	 * @param CompletionContext $context
	 * @return string[]
	 */
	public function completeOptionValues($optionName, CompletionContext $context) {
		return [];
	}

	/**
	 * @param string $argumentName
	 * @param CompletionContext $context
	 * @return string[]
	 */
	public function completeArgumentValues($argumentName, CompletionContext $context) {
		if ($argumentName === 'app') {
			$allApps = \OC_App::getAllApps();
			return array_diff($allApps, \OC_App::getEnabledApps(true, true));
		}

		if ($argumentName === 'version') {
			$appName = $context->getWordAtIndex($context->getWordIndex() - 1);

			$ms = new MigrationService($appName, $this->connection);
			$migrations = $ms->getAvailableVersions();

			array_unshift($migrations, 'next', 'latest');
			return $migrations;
		}

		return [];
	}
}