<?php

declare(strict_types=1);
/**
 * @copyright Copyright (c) 2023 Robin Appelman <robin@icewind.nl>
 *
 * @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\Files\Command;

use OC\Core\Command\Info\FileUtils;
use OCP\Files\Folder;
use OCP\Files\File;
use Symfony\Component\Console\Command\Command;
use Symfony\Component\Console\Helper\QuestionHelper;
use Symfony\Component\Console\Input\InputArgument;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Input\InputOption;
use Symfony\Component\Console\Output\OutputInterface;
use Symfony\Component\Console\Question\ConfirmationQuestion;

class Copy extends Command {
	private FileUtils $fileUtils;

	public function __construct(FileUtils $fileUtils) {
		$this->fileUtils = $fileUtils;
		parent::__construct();
	}

	protected function configure(): void {
		$this
			->setName('files:copy')
			->setDescription('Copy a file or folder')
			->addArgument('source', InputArgument::REQUIRED, "Source file id or path")
			->addArgument('target', InputArgument::REQUIRED, "Target path")
			->addOption('force', 'f', InputOption::VALUE_NONE, "Don't ask for confirmation and don't output any warnings")
			->addOption('no-target-directory', 'T', InputOption::VALUE_NONE, "When target path is folder, overwrite the folder instead of copying into the folder");
	}

	public function execute(InputInterface $input, OutputInterface $output): int {
		$sourceInput = $input->getArgument('source');
		$targetInput = $input->getArgument('target');
		$force = $input->getOption('force');
		$noTargetDir = $input->getOption('no-target-directory');

		$node = $this->fileUtils->getNode($sourceInput);
		$targetNode = $this->fileUtils->getNode($targetInput);

		if (!$node) {
			$output->writeln("<error>file $sourceInput not found</error>");
			return 1;
		}

		$targetParentPath = dirname(rtrim($targetInput, '/'));
		$targetParent = $this->fileUtils->getNode($targetParentPath);
		if (!$targetParent) {
			$output->writeln("<error>Target parent path $targetParentPath doesn't exist</error>");
			return 1;
		}

		$wouldRequireDelete = false;

		if ($targetNode) {
			if (!$targetNode->isUpdateable()) {
				$output->writeln("<error>$targetInput isn't writable</error>");
				return 1;
			}

			if ($targetNode instanceof Folder) {
				if ($noTargetDir) {
					if (!$force) {
						$output->writeln("Warning: <info>$sourceInput</info> is a file, but <info>$targetInput</info> is a folder");
					}
					$wouldRequireDelete = true;
				} else {
					$targetInput = $targetNode->getFullPath($node->getName());
					$targetNode = $this->fileUtils->getNode($targetInput);
				}
			} else {
				if ($node instanceof Folder) {
					if (!$force) {
						$output->writeln("Warning: <info>$sourceInput</info> is a folder, but <info>$targetInput</info> is a file");
					}
					$wouldRequireDelete = true;
				}
			}

			if ($wouldRequireDelete && $targetNode->getInternalPath() === '') {
				$output->writeln("<error>Mount root can't be overwritten with a different type</error>");
				return 1;
			}

			if ($wouldRequireDelete && !$targetNode->isDeletable()) {
				$output->writeln("<error>$targetInput can't be deleted to be replaced with $sourceInput</error>");
				return 1;
			}

			if (!$force && $targetNode) {
				/** @var QuestionHelper $helper */
				$helper = $this->getHelper('question');

				$question = new ConfirmationQuestion("<info>" . $targetInput . "</info> already exists, overwrite? [y/N] ", false);
				if (!$helper->ask($input, $output, $question)) {
					return 1;
				}
			}
		}

		if ($wouldRequireDelete && $targetNode) {
			$targetNode->delete();
		}

		$node->copy($targetInput);

		return 0;
	}

}