/*==LICENSE==*

CyanWorlds.com Engine - MMOG client, server and tools
Copyright (C) 2011 Cyan Worlds, Inc.

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 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 General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.

Additional permissions under GNU GPL version 3 section 7

If you modify this Program, or any covered work, by linking or
combining it with any of RAD Game Tools Bink SDK, Autodesk 3ds Max SDK,
NVIDIA PhysX SDK, Microsoft DirectX SDK, OpenSSL library, Independent
JPEG Group JPEG library, Microsoft Windows Media SDK, or Apple QuickTime SDK
(or a modified version of those libraries),
containing parts covered by the terms of the Bink SDK EULA, 3ds Max EULA,
PhysX SDK EULA, DirectX SDK EULA, OpenSSL and SSLeay licenses, IJG
JPEG Library README, Windows Media SDK EULA, or QuickTime SDK EULA, the
licensors of this Program grant you additional
permission to convey the resulting work. Corresponding Source for a
non-source form of such a combination shall include the source code for
the parts of OpenSSL and IJG JPEG Library used as well as that of the covered
work.

You can contact Cyan Worlds, Inc. by email legal@cyan.com
 or by snail mail at:
      Cyan Worlds, Inc.
      14617 N Newport Hwy
      Mead, WA   99021

*==LICENSE==*/
#ifndef __pfSecurePreloader_h__
#define __pfSecurePreloader_h__

#include "hsTypes.h"
#include "hsStlUtils.h"
#include "hsCritSect.h"
#include "hsStream.h"
#include "../plFile/plSecureStream.h"
#include "../pnKeyedObject/hsKeyedObject.h"


class plOperationProgress;

///////////////////////////////////////////////////////////////////////////////
// pfSecurePreloader - a class for handling files we want downloaded from the
// server into a temporary directory, secured, and deleted on exit. Puts stuff
// into plStreamSource for us
///////////////////////////////////////////////////////////////////////////////
class pfSecurePreloader : public hsKeyedObject
{
private:
	static pfSecurePreloader * fInstance;

	struct fileRequest
	{
		enum requestType {kSingleFile, kFileList};
		requestType		fType;
		std::wstring	fPath; // filename if kSingleFile, path if kFileList
		std::wstring	fExt; // blank if kSingleFile, extension if kFileList
	};
	std::vector<fileRequest> fRequests;

	struct fileInfo
	{
		std::wstring	fOriginalNameAndPath; // the human-readable name
		std::wstring	fGarbledNameAndPath; // the garbled temp name of the file on disk
		UInt32			fSizeInBytes; // the total size of the file
		bool			fDownloading; // is this file currently downloading?
		bool			fDownloaded; // is this file completely downloaded?
		bool			fLocal; // is the file a local copy?
	};
	std::map<std::wstring, fileInfo> fFileInfoMap; // key is human-readable name
	std::map<std::wstring, hsStream*> fD2DStreams; // direct-to-disk streams, only used while downloading from the server

	UInt32 fNumInfoRequestsRemaining; // the number of file info requests that are still pending
	UInt32 fNumDownloadRequestsRemaining; // the number of file download requests that are still pending
	UInt32 fTotalDataDownload; // the amount of data we need to download, for progress bar tracking
	UInt32 fTotalDataReceived; // the amount of data we have already preloaded, for progress bar tracking
	bool   fNetError;
	bool   fInitialized;

	UInt32 fEncryptionKey[4]; // encryption key for all the secure files

	plOperationProgress* fProgressBar;

	void IIssueDownloadRequests ();
	void IPreloadComplete ();

	void ICleanupStreams(); // closes and deletes all streams

	void INotifyAuthReconnected ();
	
	pfSecurePreloader ();

public:
	CLASSNAME_REGISTER(pfSecurePreloader);
	GETINTERFACE_ANY(pfSecurePreloader, hsKeyedObject);

	~pfSecurePreloader ();
	
	void Init ();
	void Shutdown ();

	// Client interface functions
	void RequestSingleFile(std::wstring filename); // queues a single file to be preloaded (does nothing if already preloaded)
	void RequestFileGroup(std::wstring dir, std::wstring ext); // queues a group of files to be preloaded (does nothing if already preloaded)
	void Start(); // sends all queued requests (does nothing if already preloaded)
	void Cleanup(); // closes all file pointers and cleans up after itself

	// Functions for the network callbacks
	void RequestFinished(const std::vector<std::wstring> & filenames, const std::vector<UInt32> & sizes, bool succeeded);
	void UpdateProgressBar(UInt32 bytesReceived);
	void FinishedDownload(std::wstring filename, bool succeeded);

	// Instance handling
	static pfSecurePreloader * GetInstance ();
	static bool IsInstanced ();

	// hsKeyedObject
	hsBool MsgReceive (plMessage * msg);
};

#endif // __pfSecurePreloader_h__