//////////////////////////////////////////////////////////////////////
//
// multiplaymgr.hxx
//
// Written by Duncan McCreanor, started February 2003.
// duncan.mccreanor@airservicesaustralia.com
//
// Copyright (C) 2003  Airservices Australia
// Copyright (C) 2005  Oliver Schroeder
//
// 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.
//
// $Id$
//  
//////////////////////////////////////////////////////////////////////

#ifndef MULTIPLAYMGR_H
#define MULTIPLAYMGR_H

#define MULTIPLAYTXMGR_HID "$Id$"

const int MIN_MP_PROTOCOL_VERSION = 1;
const int MAX_MP_PROTOCOL_VERSION = 2;

#include <string>
#include <vector>
#include <memory>

#include <simgear/compiler.h>
#include <simgear/props/props.hxx>
#include <simgear/io/raw_socket.hxx>
#include <simgear/structure/subsystem_mgr.hxx>

struct FGExternalMotionData;
class MPPropertyListener;
struct T_MsgHdr;
class FGAIMultiplayer;

class FGMultiplayMgr : public SGSubsystem
{
public:  
  FGMultiplayMgr();
  ~FGMultiplayMgr();
  
  virtual void init(void);
  virtual void update(double dt);
  
  virtual void shutdown(void);
  virtual void reinit();
  
  // transmitter
  
  void SendTextMessage(const std::string &sMsgText);
  // receiver
  
private:
  friend class MPPropertyListener;
  
  void setPropertiesChanged()
  {
    mPropertiesChanged = true;
  }
  int getProtocolToUse()
  {
      int protocolVersion = pProtocolVersion->getIntValue();
      if (protocolVersion >= MIN_MP_PROTOCOL_VERSION && protocolVersion <= MAX_MP_PROTOCOL_VERSION)
          return protocolVersion;
      else
          return MIN_MP_PROTOCOL_VERSION;
  }

  void findProperties();
  
  void Send();
  void SendMyPosition(const FGExternalMotionData& motionInfo);
  short get_scaled_short(double v, double scale);

  union MsgBuf;
  FGAIMultiplayer* addMultiplayer(const std::string& callsign,
                                  const std::string& modelName);
  FGAIMultiplayer* getMultiplayer(const std::string& callsign);
  void FillMsgHdr(T_MsgHdr *MsgHdr, int iMsgId, unsigned _len = 0u);
  void ProcessPosMsg(const MsgBuf& Msg, const simgear::IPAddress& SenderAddress,
                     long stamp);
  void ProcessChatMsg(const MsgBuf& Msg, const simgear::IPAddress& SenderAddress);
  bool isSane(const FGExternalMotionData& motionInfo);

  /// maps from the callsign string to the FGAIMultiplayer
  typedef std::map<std::string, SGSharedPtr<FGAIMultiplayer> > MultiPlayerMap;
  MultiPlayerMap mMultiPlayerMap;

  std::unique_ptr<simgear::Socket> mSocket;
  simgear::IPAddress mServer;
  bool mHaveServer;
  bool mInitialised;
  std::string mCallsign;
  
  // Map between the property id's from the multiplayers network packets
  // and the property nodes
  typedef std::map<unsigned int, SGSharedPtr<SGPropertyNode> > PropertyMap;
  PropertyMap mPropertyMap;
  SGPropertyNode *pProtocolVersion;
  SGPropertyNode *pXmitLen;
  SGPropertyNode *pMultiPlayDebugLevel;
  SGPropertyNode *pMultiPlayRange;
  SGPropertyNode *pMultiPlayTransmitOnlyGenerics;

  typedef std::map<unsigned int, const struct IdPropertyList*> PropertyDefinitionMap;
  PropertyDefinitionMap mPropertyDefinition;

  bool mPropertiesChanged;

  MPPropertyListener* mListener;
  
  double mDt; // reciprocal of /sim/multiplay/tx-rate-hz
  double mTimeUntilSend;
};

#endif