/*
 * Copyright (C) 2004-2013 ZNC, see the NOTICE file for details.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef _IRCSOCK_H
#define _IRCSOCK_H

#include <znc/zncconfig.h>
#include <znc/Socket.h>
#include <znc/Nick.h>

#include <deque>

// Forward Declarations
class CChan;
class CUser;
class CIRCNetwork;
class CClient;
// !Forward Declarations

class CIRCSock : public CZNCSock {
public:
	CIRCSock(CIRCNetwork* pNetwork);
	virtual ~CIRCSock();

	typedef enum {
		// These values must line up with their position in the CHANMODE argument to raw 005
		ListArg    = 0,
		HasArg     = 1,
		ArgWhenSet = 2,
		NoArg      = 3
	} EChanModeArgs;

	// Message Handlers
	bool OnCTCPReply(CNick& Nick, CString& sMessage);
	bool OnPrivCTCP(CNick& Nick, CString& sMessage);
	bool OnChanCTCP(CNick& Nick, const CString& sChan, CString& sMessage);
	bool OnGeneralCTCP(CNick& Nick, CString& sMessage);
	bool OnPrivMsg(CNick& Nick, CString& sMessage);
	bool OnChanMsg(CNick& Nick, const CString& sChan, CString& sMessage);
	bool OnPrivNotice(CNick& Nick, CString& sMessage);
	bool OnChanNotice(CNick& Nick, const CString& sChan, CString& sMessage);
	bool OnServerCapAvailable(const CString& sCap);
	// !Message Handlers

	virtual void ReadLine(const CString& sData);
	virtual void Connected();
	virtual void Disconnected();
	virtual void ConnectionRefused();
	virtual void SockError(int iErrno, const CString& sDescription);
	virtual void Timeout();
	virtual void ReachedMaxBuffer();

	void PutIRC(const CString& sLine);
	void PutIRCQuick(const CString& sLine); //!< Should be used for PONG only
	void ResetChans();
	void Quit(const CString& sQuitMsg = "");

	/** You can call this from CModule::OnServerCapResult to suspend
	 *  sending other CAP requests and CAP END for a while. Each
	 *  call to PauseCap should be balanced with a call to ResumeCap.
	 */
	void PauseCap();
	/** If you used PauseCap, call this when CAP negotiation and logging in
	 *  should be resumed again.
	 */
	void ResumeCap();

	// Setters
	void SetPass(const CString& s) { m_sPass = s; }
	// !Setters

	// Getters
	unsigned int GetMaxNickLen() const { return m_uMaxNickLen; }
	EChanModeArgs GetModeType(unsigned char uMode) const;
	unsigned char GetPermFromMode(unsigned char uMode) const;
	const std::map<unsigned char, EChanModeArgs>& GetChanModes() const { return m_mueChanModes; }
	bool IsPermChar(const char c) const { return (c != '\0' && GetPerms().find(c) != CString::npos); }
	bool IsPermMode(const char c) const { return (c != '\0' && GetPermModes().find(c) != CString::npos); }
	const CString& GetPerms() const { return m_sPerms; }
	const CString& GetPermModes() const { return m_sPermModes; }
	CString GetNickMask() const { return m_Nick.GetNickMask(); }
	const CString& GetNick() const { return m_Nick.GetNick(); }
	const CString& GetPass() const { return m_sPass; }
	CIRCNetwork* GetNetwork() const { return m_pNetwork; }
	bool HasNamesx() const { return m_bNamesx; }
	bool HasUHNames() const { return m_bUHNames; }
	const std::set<unsigned char>& GetUserModes() const { return m_scUserModes; }
	// This is true if we are past raw 001
	bool IsAuthed() const { return m_bAuthed; }
	bool IsCapAccepted(const CString& sCap) { return 1 == m_ssAcceptedCaps.count(sCap); }
	const MCString& GetISupport() const { return m_mISupport; }
	CString GetISupport(const CString& sKey, const CString& sDefault = "") const;
	// !Getters

	// This handles NAMESX and UHNAMES in a raw 353 reply
	void ForwardRaw353(const CString& sLine) const;
	void ForwardRaw353(const CString& sLine, CClient* pClient) const;

	// TODO move this function to CIRCNetwork and make it non-static?
	static bool IsFloodProtected(double fRate);
private:
	void SetNick(const CString& sNick);
	void ParseISupport(const CString& sLine);
	// This is called when we connect and the nick we want is already taken
	void SendAltNick(const CString& sBadNick);
	void SendNextCap();
	void TrySend();
protected:
	bool                                m_bAuthed;
	bool                                m_bNamesx;
	bool                                m_bUHNames;
	CString                             m_sPerms;
	CString                             m_sPermModes;
	std::set<unsigned char>             m_scUserModes;
	std::map<unsigned char, EChanModeArgs>   m_mueChanModes;
	CIRCNetwork*                        m_pNetwork;
	CNick                               m_Nick;
	CString                             m_sPass;
	std::map<CString, CChan*>           m_msChans;
	unsigned int                        m_uMaxNickLen;
	unsigned int                        m_uCapPaused;
	SCString                            m_ssAcceptedCaps;
	SCString                            m_ssPendingCaps;
	time_t                              m_lastCTCP;
	unsigned int                        m_uNumCTCP;
	static const time_t                 m_uCTCPFloodTime;
	static const unsigned int           m_uCTCPFloodCount;
	MCString                            m_mISupport;
	std::deque<CString>                 m_vsSendQueue;
	short int                           m_iSendsAllowed;
	unsigned short int                  m_uFloodBurst;
	double                              m_fFloodRate;
	bool                                m_bFloodProtection;

	friend class CIRCFloodTimer;
};

#endif // !_IRCSOCK_H