<?php

declare(strict_types=1);
/**
 * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
 * SPDX-FileCopyrightText: 2022 Nextcloud GmbH and Nextcloud contributors
 * SPDX-License-Identifier: AGPL-3.0-or-later
 */
namespace OC\Files\Node;

use OCP\Constants;
use OCP\Files\File;
use OCP\Files\FileInfo;
use OCP\Files\Folder;
use OCP\Files\IRootFolder;
use OCP\Files\Mount\IMountManager;
use OCP\Files\NotFoundException;
use OCP\IUser;
use Psr\Log\LoggerInterface;

class LazyUserFolder extends LazyFolder {
	private string $path;

	public function __construct(
		IRootFolder $rootFolder,
		private IUser $user,
		private IMountManager $mountManager,
		bool $useDefaultHomeFoldersPermissions = true,
	) {
		$this->path = '/' . $user->getUID() . '/files';
		$data = [
			'path' => $this->path,
			'type' => FileInfo::TYPE_FOLDER,
			'mimetype' => FileInfo::MIMETYPE_FOLDER,
		];

		// By default, we assume the permissions for the users' home folders.
		// If a mount point is mounted on a user's home folder, the permissions cannot be assumed.
		if ($useDefaultHomeFoldersPermissions) {
			// Sharing user root folder is not allowed
			$data['permissions'] = Constants::PERMISSION_ALL ^ Constants::PERMISSION_SHARE;
		}

		parent::__construct(
			$rootFolder,
			function () use ($user): Folder {
				try {
					$node = $this->getRootFolder()->get($this->path);
					if ($node instanceof File) {
						$e = new \RuntimeException();
						\OCP\Server::get(LoggerInterface::class)->error('User root storage is not a folder: ' . $this->path, [
							'exception' => $e,
						]);
						throw $e;
					}
					return $node;
				} catch (NotFoundException $e) {
					if (!$this->getRootFolder()->nodeExists('/' . $user->getUID())) {
						$this->getRootFolder()->newFolder('/' . $user->getUID());
					}
					return $this->getRootFolder()->newFolder($this->path);
				}
			},
			$data,
		);
	}

	public function getMountPoint() {
		if ($this->folder !== null) {
			return $this->folder->getMountPoint();
		}
		$mountPoint = $this->mountManager->find($this->path);
		if (is_null($mountPoint)) {
			throw new \Exception('No mountpoint for user folder');
		}
		return $mountPoint;
	}
}
