/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/

#ifndef BACKENDS_CLOUD_BOX_BOXSTORAGE_H
#define BACKENDS_CLOUD_BOX_BOXSTORAGE_H

#include "backends/cloud/id/idstorage.h"
#include "common/callback.h"
#include "backends/networking/curl/curljsonrequest.h"

namespace Cloud {
namespace Box {

class BoxStorage: public Id::IdStorage {
	static char *KEY, *SECRET;

	static void loadKeyAndSecret();

	Common::String _token, _refreshToken;

	/** This private constructor is called from loadFromConfig(). */
	BoxStorage(Common::String token, Common::String refreshToken);

	void tokenRefreshed(BoolCallback callback, Networking::JsonResponse response);
	void codeFlowComplete(BoolResponse response);

	/** Constructs StorageInfo based on JSON response from cloud. */
	void infoInnerCallback(StorageInfoCallback outerCallback, Networking::JsonResponse json);

	void createDirectoryInnerCallback(BoolCallback outerCallback, Networking::JsonResponse response);
public:	
	/** This constructor uses OAuth code flow to get tokens. */
	BoxStorage(Common::String code);
	virtual ~BoxStorage();

	/**
	 * Storage methods, which are used by CloudManager to save
	 * storage in configuration file.
	 */

	/**
	 * Save storage data using ConfMan.
	 * @param keyPrefix all saved keys must start with this prefix.
	 * @note every Storage must write keyPrefix + "type" key
	 *       with common value (e.g. "Dropbox").
	 */
	virtual void saveConfig(Common::String keyPrefix);

	/**
	* Return unique storage name.
	* @returns	some unique storage name (for example, "Dropbox (user@example.com)")
	*/
	virtual Common::String name() const;

	/** Public Cloud API comes down there. */

	virtual Networking::Request *listDirectoryById(Common::String id, ListDirectoryCallback callback, Networking::ErrorCallback errorCallback);
	virtual Networking::Request *createDirectoryWithParentId(Common::String parentId, Common::String name, BoolCallback callback, Networking::ErrorCallback errorCallback);

	/** Returns UploadStatus struct with info about uploaded file. */
	virtual Networking::Request *upload(Common::String remotePath, Common::String localPath, UploadCallback callback, Networking::ErrorCallback errorCallback);
	virtual Networking::Request *upload(Common::String path, Common::SeekableReadStream *contents, UploadCallback callback, Networking::ErrorCallback errorCallback);

	/** Returns whether Storage supports upload(ReadStream). */
	virtual bool uploadStreamSupported();

	/** Returns pointer to Networking::NetworkReadStream. */
	virtual Networking::Request *streamFileById(Common::String path, Networking::NetworkReadStreamCallback callback, Networking::ErrorCallback errorCallback);

	/** Calls the callback when finished. */
	virtual Networking::Request *remove(Common::String path, BoolCallback callback, Networking::ErrorCallback errorCallback) { return nullptr; } //TODO

	/** Returns the StorageInfo struct. */
	virtual Networking::Request *info(StorageInfoCallback callback, Networking::ErrorCallback errorCallback);

	/** Returns storage's saves directory path with the trailing slash. */
	virtual Common::String savesDirectoryPath();

	/**
	 * Load token and user id from configs and return BoxStorage for those.	
	 * @return pointer to the newly created BoxStorage or 0 if some problem occured.
	 */
	static BoxStorage *loadFromConfig(Common::String keyPrefix);

	virtual Common::String getRootDirectoryId();

	/**
	 * Gets new access_token. If <code> passed is "", refresh_token is used.
	 * Use "" in order to refresh token and pass a callback, so you could
	 * continue your work when new token is available.
	 */
	void getAccessToken(BoolCallback callback, Common::String code = "");

	Common::String accessToken() { return _token; }
};

} // End of namespace Box
} // End of namespace Cloud

#endif