<?php
/**
 * @copyright Copyright (c) 2018, Patrik Kernstock <info@pkern.at>
 *
 * @author Patrik Kernstock <info@pkern.at>
 *
 * @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\App;

use OC\Installer;
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\InputOption;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Output\OutputInterface;

class Remove extends Command implements CompletionAwareInterface {

	protected function configure() {
		$this
			->setName('app:remove')
			->setDescription('remove an app')
			->addArgument(
				'app-id',
				InputArgument::REQUIRED,
				'remove the specified app'
			)
			->addOption(
				'keep-data',
				null,
				InputOption::VALUE_NONE,
				'keep app data and do not remove them'
			);
	}

	protected function execute(InputInterface $input, OutputInterface $output) {
		$appId = $input->getArgument('app-id');

		if (!\OC_App::getAppPath($appId)) {
			$output->writeln($appId . ' is not installed');
			return 1;
		}

		if (!$input->getOption('keep-data')) {
			try {
				/** @var IAppManager $appManager*/
				$appManager = \OC::$server->getAppManager();
				$appManager->disableApp($appId);
				$output->writeln($appId . ' disabled');
			} catch(\Exception $e) {
				$output->writeln('Error: ' . $e->getMessage());
				return 1;
			}
		}

		try {
			/** @var Installer $installer */
			$installer = \OC::$server->query(Installer::class);
			$result = $installer->removeApp($appId);
		} catch(\Exception $e) {
			$output->writeln('Error: ' . $e->getMessage());
			return 1;
		}

		if($result === false) {
			$output->writeln($appId . ' could not be removed');
			return 1;
		}

		$output->writeln($appId . ' removed');

		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-id') {
			return \OC_App::getAllApps();
		}
		return [];
	}
}