//this file is part of eMule
//Copyright (C)2002-2008 Merkur ( strEmail.Format("%s@%s", "devteam", "emule-project.net") / http://www.emule-project.net )
//
//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., 675 Mass Ave, Cambridge, MA 02139, USA.
#pragma once
#include "MapKey.h"
#pragma warning(disable:4516) // access-declarations are deprecated; member using-declarations provide a better alternative
#pragma warning(disable:4244) // conversion from 'type1' to 'type2', possible loss of data
#pragma warning(disable:4100) // unreferenced formal parameter
#pragma warning(disable:4702) // unreachable code
#include <crypto51/rsa.h>
#pragma warning(default:4702) // unreachable code
#pragma warning(default:4100) // unreferenced formal parameter
#pragma warning(default:4244) // conversion from 'type1' to 'type2', possible loss of data
#pragma warning(default:4516) // access-declarations are deprecated; member using-declarations provide a better alternative

#define	 MAXPUBKEYSIZE		80

#define CRYPT_CIP_REMOTECLIENT	10
#define CRYPT_CIP_LOCALCLIENT	20
#define CRYPT_CIP_NONECLIENT	30

#pragma pack(1)
struct CreditStruct_29a{
	uchar		abyKey[16];
	uint32		nUploadedLo;	// uploaded TO him
	uint32		nDownloadedLo;	// downloaded from him
	uint32		nLastSeen;
	uint32		nUploadedHi;	// upload high 32
	uint32		nDownloadedHi;	// download high 32
	uint16		nReserved3;
};
// <CB Mod : SUWQT : Struct : Date 11.07.07>
// Original commented 
#ifndef CB_MOD_SUQWT_ENABLED
struct CreditStruct{
#else
struct CreditStruct_30c{
#endif
// </CB Mod : SUWQT : Struct>
	uchar		abyKey[16];
	uint32		nUploadedLo;	// uploaded TO him
	uint32		nDownloadedLo;	// downloaded from him
	uint32		nLastSeen;
	uint32		nUploadedHi;	// upload high 32
	uint32		nDownloadedHi;	// download high 32
	uint16		nReserved3;
	uint8		nKeySize;
	uchar		abySecureIdent[MAXPUBKEYSIZE];
};

// <CB Mod : SUWQT : Struct : Date 11.07.07>
#ifdef CB_MOD_SUQWT_ENABLED
struct CreditStruct_30c_SUQWTv2{
	uint32		nSecuredWaitTime;		// Moonlight: SUQWT
	uint32		nUnSecuredWaitTime;	// Moonlight: SUQWT
	uchar		abyKey[16];
	uint32		nUploadedLo;		// uploaded to him
	uint32		nDownloadedLo;	// downloaded from him
	uint32		nLastSeen;
	uint32		nUploadedHi;		// upload high 32
	uint32		nDownloadedHi;	// download high 32
	uint16		nReserved3;
	uint8		nKeySize;
	uchar		abySecureIdent[MAXPUBKEYSIZE];
};
#endif
// </CB Mod : SUWQT :Struct>
#pragma pack()
// <CB Mod : SUWQT : Struct : Date 11.07.07>
#ifdef CB_MOD_SUQWT_ENABLED
typedef CreditStruct_30c_SUQWTv2    CreditStruct;
#endif
// </CB Mod : SUWQT : Struct>

enum EIdentState{
	IS_NOTAVAILABLE,
	IS_IDNEEDED,
	IS_IDENTIFIED,
	IS_IDFAILED,
	IS_IDBADGUY,
};

// <CB Mod : Rating Calculation : Date 11.07.07>
#ifdef CB_MOD_RRR_ENABLED
enum ERatingReductionReason {
	RRR_RATIO,
	RRR_SUI,
	RRR_FW,
	RRR_ILLEGAL,
	RRR_GPL,
	RRR_VERSION,

	RRR_MAX
};
#endif
// </CB Mod : Rating Calculation>


class CClientCredits
{
	friend class CClientCreditsList;
public:
	CClientCredits(CreditStruct* in_credits);
	CClientCredits(const uchar* key);
	~CClientCredits();

	const uchar* GetKey() const					{return m_pCredits->abyKey;}
	uchar*	GetSecureIdent()					{return m_abyPublicKey;}
	uint8	GetSecIDKeyLen() const				{return m_nPublicKeyLen;}
	CreditStruct* GetDataStruct() const			{return m_pCredits;}
	void	ClearWaitStartTime();
	void	AddDownloaded(uint32 bytes, uint32 dwForIP);
	void	AddUploaded(uint32 bytes, uint32 dwForIP);
	uint64	GetUploadedTotal() const;
	uint64	GetDownloadedTotal() const;
	// <CB Mod : CreditSystem : Date 11.07.07>
#ifndef CB_MOD_FINECS_ENABLED
	float	GetScoreRatio(uint32 dwForIP) const;
#else
	float	GetScoreRatio(uint32 dwForIP, const CUpDownClient *client) const;
#endif
	// </CB Mod : CreditSystem>
	void	SetLastSeen()					{m_pCredits->nLastSeen = time(NULL);}
	bool	SetSecureIdent(const uchar* pachIdent, uint8 nIdentLen); // Public key cannot change, use only if there is not public key yet
	uint32	m_dwCryptRndChallengeFor;
	uint32	m_dwCryptRndChallengeFrom;
	EIdentState	GetCurrentIdentState(uint32 dwForIP) const; // can be != IdentState
	uint32	GetSecureWaitStartTime(uint32 dwForIP);
	void	SetSecWaitStartTime(uint32 dwForIP);
	
	// <CB Mod : SUWQT : Date 11.07.07>
#ifdef CB_MOD_SUQWT_ENABLED
	bool IsActive(uint32 dwExpire);
	void SaveUploadQueueWaitTime(int iKeepPct = 100);
	void ClearUploadQueueWaitTime();
	uint32 GetSUQWT(uint32 dwForIP) const;
#endif
	// </CB Mod : SUWQT>
	
	// <CB Mod : Rating Calculation : Date 11.07.07>
#ifdef CB_MOD_RRR_ENABLED
	uint8		GetRRR() const { return m_RatingReductionReasons; }
	void		SetRRR(uint8 r, bool status) {status ? m_RatingReductionReasons |= (1<<r) : m_RatingReductionReasons &= ~(1<<r); }
	CString GetRRRString() const;
#endif
	// </CB Mod : Rating Calculation>

	// <CB Mod : BestShare : Date 25.08.07>
#ifdef CB_MOD_BESTSHARE_ENABLED
	uint32  GetBonusTime() const {return m_BonusTime;}
	void    SetBonusTime(uint32 time) {m_BonusTime = time;}
	void    AddBonusTime(uint32 time) {m_BonusTime += time;}
#endif
	// </CB Mod : BestShare : Date 25.08.07>


protected:
	void	Verified(uint32 dwForIP);
	EIdentState IdentState;
private:
	void			InitalizeIdent();
	CreditStruct*	m_pCredits;
	byte			m_abyPublicKey[80];			// even keys which are not verified will be stored here, and - if verified - copied into the struct
	uint8			m_nPublicKeyLen;
	uint32		m_dwIdentIP;
	uint32		m_dwSecureWaitTime;
	uint32		m_dwUnSecureWaitTime;
	uint32		m_dwWaitTimeIP;			   // client IP assigned to the waittime
	
	// <CB Mod : Rating Calculation : Date 11.07.07>
#ifdef CB_MOD_RRR_ENABLED
	uint8 m_RatingReductionReasons; // bitfield with reasons for rating reduction
#endif
	// </CB Mod : Rating Calculation>

	// <CB Mod : BestShare : Date 25.08.07>
#ifdef CB_MOD_BESTSHARE_ENABLED
	uint32   m_BonusTime;
#endif
	// </CB Mod : BestShare : Date 25.08.07>

};

class CClientCreditsList
{
public:
	CClientCreditsList();
	~CClientCreditsList();
	
			// return signature size, 0 = Failed | use sigkey param for debug only
	uint8	CreateSignature(CClientCredits* pTarget, uchar* pachOutput, uint8 nMaxSize, uint32 ChallengeIP, uint8 byChaIPKind, CryptoPP::RSASSA_PKCS1v15_SHA_Signer* sigkey = NULL);
	bool	VerifyIdent(CClientCredits* pTarget, const uchar* pachSignature, uint8 nInputSize, uint32 dwForIP, uint8 byChaIPKind);

	CClientCredits* GetCredit(const uchar* key) ;
	void	Process();
	uint8	GetPubKeyLen() const			{return m_nMyPublicKeyLen;}
	byte*	GetPublicKey()					{return m_abyMyPublicKey;}
	bool	CryptoAvailable();
protected:
	void	LoadList();
	void	SaveList();
	void	InitalizeCrypting();
	bool	CreateKeyPair();
#ifdef _DEBUG
	bool	Debug_CheckCrypting();
#endif
private:
	CMap<CCKey, const CCKey&, CClientCredits*, CClientCredits*> m_mapClients;
	uint32			m_nLastSaved;
	CryptoPP::RSASSA_PKCS1v15_SHA_Signer*		m_pSignkey;
	byte			m_abyMyPublicKey[80];
	uint8			m_nMyPublicKeyLen;
};
