<?php

declare(strict_types=1);


/**
 * Circles - Bring cloud-users closer together.
 *
 * This file is licensed under the Affero General Public License version 3 or
 * later. See the COPYING file.
 *
 * @author Maxence Lange <maxence@artificial-owl.com>
 * @copyright 2021
 * @license GNU AGPL version 3 or any later version
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * 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
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */


namespace OCA\Circles\Command;

use daita\MySmallPhpTools\Exceptions\InvalidItemException;
use daita\MySmallPhpTools\Exceptions\RequestNetworkException;
use daita\MySmallPhpTools\Exceptions\SignatoryException;
use OC\Core\Command\Base;
use OCA\Circles\Exceptions\FederatedEventException;
use OCA\Circles\Exceptions\FederatedItemException;
use OCA\Circles\Exceptions\InitiatorNotFoundException;
use OCA\Circles\Model\Circle;
use OCA\Circles\Service\CircleService;
use OCA\Circles\Service\ConfigService;
use OCA\Circles\Service\FederatedUserService;
use OCP\IL10N;
use Symfony\Component\Console\Exception\InvalidArgumentException;
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 CirclesConfig
 *
 * @package OCA\Circles\Command
 */
class CirclesConfig extends Base {


	/** @var IL10N */
	private $l10n;

	/** @var FederatedUserService */
	private $federatedUserService;

	/** @var CircleService */
	private $circleService;

	/** @var ConfigService */
	private $configService;


	/**
	 * CirclesConfig constructor.
	 *
	 * @param IL10N $l10n
	 * @param FederatedUserService $federatedUserService
	 * @param CircleService $circlesService
	 * @param ConfigService $configService
	 */
	public function __construct(
		IL10N $l10n, FederatedUserService $federatedUserService, CircleService $circlesService,
		ConfigService $configService
	) {
		parent::__construct();

		$this->l10n = $l10n;
		$this->federatedUserService = $federatedUserService;
		$this->circleService = $circlesService;
		$this->configService = $configService;
	}


	/**
	 *
	 */
	protected function configure() {
		parent::configure();
		$this->setName('circles:manage:config')
			 ->setDescription('edit config/type of a Circle')
			 ->addArgument('circle_id', InputArgument::REQUIRED, 'ID of the circle')
			 ->addArgument(
				 'config', InputArgument::IS_ARRAY,
				 'list of value to change in the configuration of the Circle'
			 )
			 ->addOption('initiator', '', InputOption::VALUE_REQUIRED, 'set an initiator to the request', '')
			 ->addOption('status-code', '', InputOption::VALUE_NONE, 'display status code on exception');
	}


	/**
	 * @param InputInterface $input
	 * @param OutputInterface $output
	 *
	 * @return int
	 * @throws FederatedEventException
	 * @throws FederatedItemException
	 * @throws InitiatorNotFoundException
	 * @throws InvalidItemException
	 * @throws RequestNetworkException
	 * @throws SignatoryException
	 */
	protected function execute(InputInterface $input, OutputInterface $output): int {
		$circleId = (string)$input->getArgument('circle_id');

		try {
			$this->federatedUserService->commandLineInitiator(
				$input->getOption('initiator'), $circleId, false
			);

			$circle = $this->circleService->getCircle($circleId);

			if (empty($input->getArgument('config'))) {
				$output->writeln(
					json_encode(Circle::getCircleFlags($circle, Circle::FLAGS_LONG), JSON_PRETTY_PRINT)
				);

				return 0;
			}

			$new = $this->generateConfig($circle, $input->getArgument('config'));
			$outcome = $this->circleService->updateConfig($circleId, $new);
		} catch (FederatedItemException $e) {
			if ($input->getOption('status-code')) {
				throw new FederatedItemException(
					' [' . get_class($e) . ', ' . $e->getStatus() . ']' . "\n" . $e->getMessage()
				);
			}

			throw $e;
		}

		$output->writeln(json_encode($outcome, JSON_PRETTY_PRINT));

		return 0;
	}


	/**
	 * @param Circle $circle
	 * @param array $listing
	 *
	 * @return int
	 */
	private function generateConfig(Circle $circle, array $listing): int {
		$current = clone $circle;
		$valid = $this->filterValidConfig($current);
		foreach ($listing as $item) {
			$add = true;
			if (substr($item, 0, 1) === '_') {
				$add = false;
				$item = substr($item, 1);
			}

			$value = array_search(strtoupper($item), $valid);
			if (!$value) {
				throw new InvalidArgumentException(
					'Invalid config \'' . $item . '\'. Available values: '
					. implode(', ', array_values($valid)) . '. '
					. 'To disable a config, start the value with an underscore'
				);
			}

			if ($add) {
				$current->addConfig($value);
			} else {
				$current->remConfig($value);
			}
		}

		return $current->getConfig();
	}


	private function filterValidConfig(Circle $circle): array {
		$listing = Circle::$DEF_CFG;
		$filters = Circle::$DEF_CFG_CORE_FILTER;
		if (!$circle->isConfig(Circle::CFG_SYSTEM)) {
			$filters = array_merge($filters, Circle::$DEF_CFG_SYSTEM_FILTER);
		}

		foreach ($filters as $filter) {
			unset($listing[$filter]);
		}

		array_walk(
			$listing,
			function(string &$v): void {
				list(, $long) = explode('|', $v);
				$v = strtoupper(str_replace(' ', '', $long));
			}
		);

		return $listing;
	}

}

