<?php

declare(strict_types=1);

/**
 * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
 * SPDX-License-Identifier: AGPL-3.0-only
 */
namespace OC\Core\Command\App;

use OC\Installer;
use OCP\App\AppPathNotFoundException;
use OCP\App\IAppManager;
use OCP\IGroup;
use OCP\IGroupManager;
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\Input\InputOption;
use Symfony\Component\Console\Output\OutputInterface;

class Enable extends Command implements CompletionAwareInterface {
	protected int $exitCode = 0;

	public function __construct(
		protected IAppManager $appManager,
		protected IGroupManager $groupManager,
	) {
		parent::__construct();
	}

	protected function configure(): void {
		$this
			->setName('app:enable')
			->setDescription('enable an app')
			->addArgument(
				'app-id',
				InputArgument::REQUIRED | InputArgument::IS_ARRAY,
				'enable the specified app'
			)
			->addOption(
				'groups',
				'g',
				InputOption::VALUE_REQUIRED | InputOption::VALUE_IS_ARRAY,
				'enable the app only for a list of groups'
			)
			->addOption(
				'force',
				'f',
				InputOption::VALUE_NONE,
				'enable the app regardless of the Nextcloud version requirement'
			);
	}

	protected function execute(InputInterface $input, OutputInterface $output): int {
		$appIds = $input->getArgument('app-id');
		$groups = $this->resolveGroupIds($input->getOption('groups'));
		$forceEnable = (bool)$input->getOption('force');

		foreach ($appIds as $appId) {
			$this->enableApp($appId, $groups, $forceEnable, $output);
		}

		return $this->exitCode;
	}

	/**
	 * @param string $appId
	 * @param array $groupIds
	 * @param bool $forceEnable
	 * @param OutputInterface $output
	 */
	private function enableApp(string $appId, array $groupIds, bool $forceEnable, OutputInterface $output): void {
		$groupNames = array_map(function (IGroup $group) {
			return $group->getDisplayName();
		}, $groupIds);

		if ($this->appManager->isInstalled($appId) && $groupIds === []) {
			$output->writeln($appId . ' already enabled');
			return;
		}

		try {
			/** @var Installer $installer */
			$installer = \OC::$server->query(Installer::class);

			if ($installer->isDownloaded($appId) === false) {
				$installer->downloadApp($appId);
			}

			$installer->installApp($appId, $forceEnable);
			$appVersion = $this->appManager->getAppVersion($appId);

			if ($groupIds === []) {
				$this->appManager->enableApp($appId, $forceEnable);
				$output->writeln($appId . ' ' . $appVersion . ' enabled');
			} else {
				$this->appManager->enableAppForGroups($appId, $groupIds, $forceEnable);
				$output->writeln($appId . ' ' . $appVersion . ' enabled for groups: ' . implode(', ', $groupNames));
			}
		} catch (AppPathNotFoundException $e) {
			$output->writeln($appId . ' not found');
			$this->exitCode = 1;
		} catch (\Exception $e) {
			$output->writeln($e->getMessage());
			$this->exitCode = 1;
		}
	}

	/**
	 * @param array $groupIds
	 * @return array
	 */
	private function resolveGroupIds(array $groupIds): array {
		$groups = [];
		foreach ($groupIds as $groupId) {
			$group = $this->groupManager->get($groupId);
			if ($group instanceof IGroup) {
				$groups[] = $group;
			}
		}
		return $groups;
	}

	/**
	 * @param string $optionName
	 * @param CompletionContext $context
	 * @return string[]
	 */
	public function completeOptionValues($optionName, CompletionContext $context): array {
		if ($optionName === 'groups') {
			return array_map(function (IGroup $group) {
				return $group->getGID();
			}, $this->groupManager->search($context->getCurrentWord()));
		}
		return [];
	}

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