//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 "Kademlia/Utils/KadClientSearcher.h"

class CUpDownClient;
class CFileDataIO;
class CFriendConnectionListener;

enum EFriendConnectState{
	FCS_NONE = 0,
	FCS_CONNECTING,
	FCS_AUTH,
	FCS_KADSEARCHING,
};

enum EFriendConnectReport{
	FCR_ESTABLISHED = 0,
	FCR_DISCONNECTED,
	FCR_USERHASHVERIFIED,
	FCR_USERHASHFAILED,
	FCR_SECUREIDENTFAILED,
	FCR_DELETED
};

#define	FF_NAME		0x01
#define	FF_KADID	0x02

///////////////////////////////////////////////////////////////////////////////
// CFriendConnectionListener

class CFriendConnectionListener
{
public:
	virtual void	ReportConnectionProgress(CUpDownClient* pClient, CString strProgressDesc, bool bNoTimeStamp) = 0;
	virtual void	ConnectingResult(CUpDownClient* pClient, bool bSuccess) = 0;
	virtual void	ClientObjectChanged(CUpDownClient* pOldClient, CUpDownClient* pNewClient) = 0;
};

///////////////////////////////////////////////////////////////////////////////
// CFriend
class CFriend : public Kademlia::CKadClientSearcher
{
public:
	CFriend();
	CFriend(CUpDownClient* client);
	CFriend(const uchar* abyUserhash, uint32 dwLastSeen, uint32 dwLastUsedIP, uint16 nLastUsedPort, 
            uint32 dwLastChatted, LPCTSTR pszName, uint32 dwHasHash);
	~CFriend();

	uchar	m_abyUserhash[16];
	
	uint32	m_dwLastSeen;
	uint32	m_dwLastUsedIP;
	uint16	m_nLastUsedPort;
	uint32	m_dwLastChatted;
	CString m_strName;

    CUpDownClient*	GetLinkedClient(bool bValidCheck = false) const;
    void			SetLinkedClient(CUpDownClient* linkedClient);
	CUpDownClient*	GetClientForChatSession();

	void	LoadFromFile(CFileDataIO* file);
	void	WriteToFile(CFileDataIO* file);

	bool	TryToConnect(CFriendConnectionListener* pConnectionReport);
	void	UpdateFriendConnectionState(EFriendConnectReport eEvent);
	bool	IsTryingToConnect() const										{return m_FriendConnectState != FCS_NONE;}
	bool	CancelTryToConnect(CFriendConnectionListener* pConnectionReport);
	void	FindKadID();
	void	KadSearchNodeIDByIPResult(Kademlia::EKadClientSearchRes eStatus, const uchar* pachNodeID);
	void	KadSearchIPByNodeIDResult(Kademlia::EKadClientSearchRes eStatus, uint32 dwIP, uint16 nPort);

	void	SendMessage(CString strMessage);

    void	SetFriendSlot(bool newValue);
    bool	GetFriendSlot() const;
	
	bool	HasUserhash() const;
	bool	HasKadID() const;

private:
	uchar	m_abyKadID[16];
    bool	m_friendSlot;
	uint32	m_dwLastKadSearch;
	
	EFriendConnectState			m_FriendConnectState;
	CTypedPtrList<CPtrList, CFriendConnectionListener*> m_liConnectionReport;
	CUpDownClient*				m_LinkedClient;
};
