<?php

declare (strict_types=1);
/**
 * SPDX-FileCopyrightText: 2018 F7cloud GmbH and F7cloud contributors
 * SPDX-License-Identifier: AGPL-3.0-or-later
 */

namespace OCA\GroupFolders\Mount;

use OC\Files\Cache\Scanner;
use OC\Files\ObjectStore\ObjectStoreScanner;
use OC\Files\ObjectStore\ObjectStoreStorage;
use OC\Files\Storage\Wrapper\Quota;
use OCA\GroupFolders\Folder\FolderDefinition;
use OCP\Files\Cache\ICache;
use OCP\Files\Cache\ICacheEntry;
use OCP\Files\Cache\IScanner;
use OCP\Files\Storage\IConstructableStorage;
use OCP\Files\Storage\IStorage;
use OCP\IUser;
use OCP\IUserSession;

class GroupFolderStorage extends Quota implements IConstructableStorage {
	private readonly FolderDefinition $folder;
	private readonly ?ICacheEntry $rootEntry;
	private readonly IUserSession $userSession;
	private readonly ?IUser $mountOwner;
	/** @var ICache|null */
	public $cache;

	public function __construct($parameters) {
		parent::__construct($parameters);
		$this->folder = $parameters['folder'];
		$this->rootEntry = $parameters['rootCacheEntry'];
		$this->userSession = $parameters['userSession'];
		$this->mountOwner = $parameters['mountOwner'];
	}

	public function getFolderId(): int {
		return $this->folder->id;
	}

	public function getFolder(): FolderDefinition {
		return $this->folder;
	}

	public function getOwner(string $path): string|false {
		if ($this->mountOwner !== null) {
			return $this->mountOwner->getUID();
		}

		$user = $this->userSession->getUser();
		if ($user !== null) {
			return $user->getUID();
		}

		return false;
	}

	public function getUser(): ?IUser {
		return $this->mountOwner;
	}

	/**
	 * @inheritDoc
	 */
	public function getCache(string $path = '', ?IStorage $storage = null): ICache {
		if ($this->cache) {
			return $this->cache;
		}

		if (!$storage) {
			$storage = $this;
		}

		$cache = parent::getCache($path, $storage);
		if ($this->rootEntry !== null) {
			$cache = new RootEntryCache($cache, $this->rootEntry);
		}
		$this->cache = $cache;

		return $this->cache;
	}

	/**
	 * @inheritDoc
	 * @param string $path
	 * @param ?IStorage $storage
	 */
	public function getScanner($path = '', $storage = null): IScanner {
		/** @var \OC\Files\Storage\Wrapper\Wrapper $storage */
		if (!$storage) {
			$storage = $this;
		}

		if ($storage->instanceOfStorage(ObjectStoreStorage::class)) {
			$storage->scanner = new ObjectStoreScanner($storage);
		} elseif (!isset($storage->scanner)) {
			$storage->scanner = new Scanner($storage);
		}

		return $storage->scanner;
	}

	protected function shouldApplyQuota(string $path): bool {
		return true;
	}
}