#if !defined(RESIP_TRANSACTION_CONTROLLER_HXX)
#define RESIP_TRANSACTION_CONTROLLER_HXX

#include "resip/stack/TuSelector.hxx"
#include "resip/stack/TransactionMap.hxx"
#include "resip/stack/TransportSelector.hxx"
#include "resip/stack/TimerQueue.hxx"
#include "rutil/CongestionManager.hxx"

#include "rutil/ConsumerFifoBuffer.hxx"

namespace resip
{

class TransactionMessage;
class TimerMessage;
class ApplicationMessage;
class StatisticsManager;
class SipStack;
class Compression;
class FdPollGrp;

class TransactionController
{
   public:
      // set after starting at your peril
      static unsigned int MaxTUFifoSize;
      static unsigned int MaxTUFifoTimeDepthSecs;

      TransactionController(SipStack& stack, AsyncProcessHandler* handler, bool useDnsVip);
      ~TransactionController();

      void process(int timeout=0);
      unsigned int getTimeTillNextProcessMS();

      // graceful shutdown (eventually)
      void shutdown();

      TransportSelector& transportSelector() { return mTransportSelector; }
      const TransportSelector& transportSelector() const { return mTransportSelector; }

      bool isTUOverloaded() const;
      
      void send(SipMessage* msg);

      unsigned int getTuFifoSize() const;
      unsigned int sumTransportFifoSizes() const;
      unsigned int getTransactionFifoSize() const;
      unsigned int getNumClientTransactions() const;
      unsigned int getNumServerTransactions() const;
      unsigned int getTimerQueueSize() const;
      void zeroOutStatistics();
      void pollStatistics();
      
      void setCongestionManager( CongestionManager *manager ) 
      { 
         mTransportSelector.setCongestionManager(manager);
         if(mCongestionManager)
         {
            mCongestionManager->unregisterFifo(&mStateMacFifo);
         }
         mCongestionManager=manager;
         if(mCongestionManager)
         {
            mCongestionManager->registerFifo(&mStateMacFifo);
         }
      }

      CongestionManager::RejectionBehavior getRejectionBehavior() const
      {
         if(mCongestionManager)
         {
            return mCongestionManager->getRejectionBehavior(&mStateMacFifo);
         }
         return CongestionManager::NORMAL;
      }

      void registerMarkListener(MarkListener* listener);
      void unregisterMarkListener(MarkListener* listener);

      inline bool getFixBadDialogIdentifiers() const 
      {
         return mFixBadDialogIdentifiers;
      }

      inline void setFixBadDialogIdentifiers(bool pFixBadDialogIdentifiers) 
      {
         mFixBadDialogIdentifiers = pFixBadDialogIdentifiers;
      }

      inline bool getFixBadCSeqNumbers() const { return mFixBadCSeqNumbers;} 
      inline void setFixBadCSeqNumbers(bool pFixBadCSeqNumbers)
      {
         mFixBadCSeqNumbers = pFixBadCSeqNumbers;
      }

      void abandonServerTransaction(const Data& tid);
      void cancelClientInviteTransaction(const Data& tid, const resip::Tokens* reasons);
      void addTransport(std::unique_ptr<Transport> transport);
      void removeTransport(unsigned int transportKey);
      void terminateFlow(const resip::Tuple& flow);
      void enableFlowTimer(const resip::Tuple& flow);

      void setInterruptor(AsyncProcessHandler* handler);

      void invokeAfterSocketCreationFunc(TransportType type);

   private:
      TransactionController(const TransactionController& rhs);
      TransactionController& operator=(const TransactionController& rhs);
      SipStack& mStack;
      
      // If true, indicate to the Transaction to ignore responses for which
      // there is no transaction. 
      // !jf! Probably should transmit stray responses statelessly. see RFC3261
      bool mDiscardStrayResponses;

      bool mFixBadDialogIdentifiers;

      bool mFixBadCSeqNumbers;
      // fifo used to communicate to the transaction state machine within the
      // stack. Not for external use by the application. May contain, sip
      // messages (requests and responses), timers (used by state machines),
      // asynchronous dns responses, transport errors from the underlying
      // transports, etc. 
      Fifo<TransactionMessage> mStateMacFifo;
      ConsumerFifoBuffer<TransactionMessage> mStateMacFifoOutBuffer;
      CongestionManager* mCongestionManager;

      //This needs to be separate from mStateMacFifo, because timer messages
      //need to be processed before other work. (If timers start getting behind
      //all kinds of nastiness occurs. We can tolerate some SipMessage traffic
      //getting behind, but processing timers late can cripple the entire
      //system with state-bloat.)
      // !bwc! This thing does not need to be threadsafe; it is both populated 
      // and consumed from the same thread.
      Fifo<TimerMessage> mTimerFifo;

      // from the sipstack (for convenience)
      TuSelector& mTuSelector;

      // Used to decide which transport to send a sip message on. 
      TransportSelector mTransportSelector;

      // stores all of the transactions that are currently active in this stack 
      TransactionMap mClientTransactionMap;
      TransactionMap mServerTransactionMap;

      // timers associated with the transactions. When a timer fires, it is
      // placed in the mStateMacFifo
      TransactionTimerQueue  mTimers;

      bool mShuttingDown;
      
      StatisticsManager& mStatsManager;
      
      Data mHostname;
      
      friend class SipStack; // for debug only
      friend class StatelessHandler;
      friend class TransactionState;
      friend class TransportSelector;

      friend class TestDnsResolver;
      friend class TestFSM;
};


}


#endif
/* ====================================================================
 * The Vovida Software License, Version 1.0 
 * 
 * Copyright (c) 2004 Vovida Networks, Inc.  All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
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 * 
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 * This software consists of voluntary contributions made by Vovida
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 * vi: set shiftwidth=3 expandtab:
 */
