<?php
/**
 * Copyright (c) 2013 Owen Winkler <ringmaster@midnightcircus.com>
 * This file is licensed under the Affero General Public License version 3 or
 * later.
 * See the COPYING-README file.
 */

namespace OC\Core\Command;

use OC\Updater;
use OCP\IConfig;
use Symfony\Component\Console\Command\Command;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Output\OutputInterface;
use Symfony\Component\Console\Input\InputOption;

class Upgrade extends Command {

	const ERROR_SUCCESS = 0;
	const ERROR_NOT_INSTALLED = 1;
	const ERROR_MAINTENANCE_MODE = 2;
	const ERROR_UP_TO_DATE = 3;
	const ERROR_INVALID_ARGUMENTS = 4;

	public $upgradeFailed = false;

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

	/**
	 * @param IConfig $config
	 */
	public function __construct(IConfig $config) {
		parent::__construct();
		$this->config = $config;
	}

	protected function configure() {
		$this
			->setName('upgrade')
			->setDescription('run upgrade routines')
			->addOption(
				'--skip-migration-test',
				null,
				InputOption::VALUE_NONE,
				'skips the database schema migration simulation and update directly'
			)
			->addOption(
				'--dry-run',
				null,
				InputOption::VALUE_NONE,
				'only runs the database schema migration simulation, do not actually update'
			);
	}

	/**
	 * Execute the upgrade command
	 *
	 * @param InputInterface $input input interface
	 * @param OutputInterface $output output interface
	 */
	protected function execute(InputInterface $input, OutputInterface $output) {

		$simulateStepEnabled = true;
		$updateStepEnabled = true;

		if ($input->getOption('skip-migration-test')) {
			$simulateStepEnabled = false;
		}
	   	if ($input->getOption('dry-run')) {
			$updateStepEnabled = false;
		}

		if (!$simulateStepEnabled && !$updateStepEnabled) {
			$output->writeln(
				'<error>Only one of "--skip-migration-test" or "--dry-run" ' .
				'can be specified at a time.</error>'
			);
			return self::ERROR_INVALID_ARGUMENTS;
		}

		if(\OC::checkUpgrade(false)) {
			$self = $this;
			$updater = new Updater(\OC::$server->getHTTPHelper(), \OC::$server->getAppConfig());

			$updater->setSimulateStepEnabled($simulateStepEnabled);
			$updater->setUpdateStepEnabled($updateStepEnabled);

			$updater->listen('\OC\Updater', 'maintenanceStart', function () use($output) {
				$output->writeln('<info>Turned on maintenance mode</info>');
			});
			$updater->listen('\OC\Updater', 'maintenanceEnd',
				function () use($output, $updateStepEnabled, $self) {
					$output->writeln('<info>Turned off maintenance mode</info>');
					$mode = $updateStepEnabled ? 'Update' : 'Update simulation';
					$status = $self->upgradeFailed ? 'failed' : 'successful';
					$message = "<info>$mode $status</info>";
					$output->writeln($message);
				});
			$updater->listen('\OC\Updater', 'dbUpgrade', function () use($output) {
				$output->writeln('<info>Updated database</info>');
			});
			$updater->listen('\OC\Updater', 'dbSimulateUpgrade', function () use($output) {
				$output->writeln('<info>Checked database schema update</info>');
			});
			$updater->listen('\OC\Updater', 'disabledApps', function ($appList) use($output) {
				$output->writeln('<info>Disabled incompatible apps: ' . implode(', ', $appList) . '</info>');
			});

			$updater->listen('\OC\Updater', 'failure', function ($message) use($output, $self) {
				$output->writeln("<error>$message</error>");
				$self->upgradeFailed = true;
			});

			$updater->upgrade();

			$this->postUpgradeCheck($input, $output);

			return self::ERROR_SUCCESS;
		} else if($this->config->getSystemValue('maintenance', false)) {
			//Possible scenario: ownCloud core is updated but an app failed
			$output->writeln('<warning>ownCloud is in maintenance mode</warning>');
			$output->write('<comment>Maybe an upgrade is already in process. Please check the '
				. 'logfile (data/owncloud.log). If you want to re-run the '
				. 'upgrade procedure, remove the "maintenance mode" from '
				. 'config.php and call this script again.</comment>'
				, true);
			return self::ERROR_MAINTENANCE_MODE;
		} else {
			$output->writeln('<info>ownCloud is already latest version</info>');
			return self::ERROR_UP_TO_DATE;
		}
	}

	/**
	 * Perform a post upgrade check (specific to the command line tool)
	 *
	 * @param InputInterface $input input interface
	 * @param OutputInterface $output output interface
	 */
	protected function postUpgradeCheck(InputInterface $input, OutputInterface $output) {
		$trustedDomains = $this->config->getSystemValue('trusted_domains', array());
		if (empty($trustedDomains)) {
			$output->write(
				'<warning>The setting "trusted_domains" could not be ' .
				'set automatically by the upgrade script, ' .
				'please set it manually</warning>'
			);
		}
	}
}