<?php
/**
 * @author Joas Schilling <nickvergessen@owncloud.com>
 * @author Morris Jobke <hey@morrisjobke.de>
 * @author Thomas Müller <thomas.mueller@tmit.eu>
 * @author Robin McCorkell <rmccorkell@karoshi.org.uk>
 *
 * @copyright Copyright (c) 2015, ownCloud, Inc.
 * @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\App\CodeChecker\CodeChecker;
use OC\App\CodeChecker\EmptyCheck;
use Symfony\Component\Console\Command\Command;
use Symfony\Component\Console\Input\InputArgument;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Input\InputOption;
use Symfony\Component\Console\Output\OutputInterface;

class CheckCode extends Command {
	protected $checkers = [
		'private' => '\OC\App\CodeChecker\PrivateCheck',
		'deprecation' => '\OC\App\CodeChecker\DeprecationCheck',
		'strong-comparison' => '\OC\App\CodeChecker\StrongComparisonCheck',
	];

	protected function configure() {
		$this
			->setName('app:check-code')
			->setDescription('check code to be compliant')
			->addArgument(
				'app-id',
				InputArgument::REQUIRED,
				'check the specified app'
			)
			->addOption(
				'checker',
				'c',
				InputOption::VALUE_REQUIRED | InputOption::VALUE_IS_ARRAY,
				'enable the specified checker(s)',
				[ 'private', 'deprecation', 'strong-comparison' ]
			);
	}

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

		$checkList = new EmptyCheck();
		foreach ($input->getOption('checker') as $checker) {
			if (!isset($this->checkers[$checker])) {
				throw new \InvalidArgumentException('Invalid checker: '.$checker);
			}
			$checkerClass = $this->checkers[$checker];
			$checkList = new $checkerClass($checkList);
		}

		$codeChecker = new CodeChecker($checkList);

		$codeChecker->listen('CodeChecker', 'analyseFileBegin', function($params) use ($output) {
			if(OutputInterface::VERBOSITY_VERBOSE <= $output->getVerbosity()) {
				$output->writeln("<info>Analysing {$params}</info>");
			}
		});
		$codeChecker->listen('CodeChecker', 'analyseFileFinished', function($filename, $errors) use ($output) {
			$count = count($errors);

			// show filename if the verbosity is low, but there are errors in a file
			if($count > 0 && OutputInterface::VERBOSITY_VERBOSE > $output->getVerbosity()) {
				$output->writeln("<info>Analysing {$filename}</info>");
			}

			// show error count if there are errros present or the verbosity is high
			if($count > 0 || OutputInterface::VERBOSITY_VERBOSE <= $output->getVerbosity()) {
				$output->writeln(" {$count} errors");
			}
			usort($errors, function($a, $b) {
				return $a['line'] >$b['line'];
			});

			foreach($errors as $p) {
				$line = sprintf("%' 4d", $p['line']);
				$output->writeln("    <error>line $line: {$p['disallowedToken']} - {$p['reason']}</error>");
			}
		});
		$errors = $codeChecker->analyse($appId);
		if (empty($errors)) {
			$output->writeln('<info>App is compliant - awesome job!</info>');
			return 0;
		} else {
			$output->writeln('<error>App is not compliant</error>');
			return 101;
		}
	}
}