/*!
 * @file connection_monitor.h
    \brief interface for all classes that have to be synchronized
 */

#ifndef _SYNCHRONIZEABLE_H
#define _SYNCHRONIZEABLE_H

#include "base_object.h"
#include "netdefs.h"
#include "converter.h"



#include <vector>
#include <list>

//State constants: They have to be of the form 2^n
#define STATE_SERVER 1
#define STATE_OUTOFSYNC 2
#define STATE_REQUESTEDSYNC 4


//macros to help writing data in byte buffer
/*
 * Important: these macros must be used in
 *     SYNCHELP_READ_*:  virtual void      writeBytes(const byte* data, int length, int sender);
 *     SYNCHELP_WRITE_*: virtual int       readBytes(byte* data, int maxLength, int * reciever);
 * with the same argument names!
 *
 * SYNCHELP_WRITE_BEGIN()
 * SYNCHELP_WRITE_INT(i)
 * SYNCHELP_WRITE_FLOAT(f)
 * SYNCHELP_WRITE_BYTE(b)
 * SYNCHELP_WRITE_STRING(s)
 * SYNCHELP_WRITE_N
 *
 * SYNCHELP_READ_BEGIN()
 * SYNCHELP_READ_INT(i)
 * SYNCHELP_READ_FLOAT(f)
 * SYNCHELP_READ_STRING(s,l) l = size of buffer s
 * SYNCHELP_READ_STRINGM(s)  allocates memory for string! you have to free this after
 * SYNCHELP_READ_BYTE(b)
 * SYNCHELP_READ_N
 *
 *
 *
 * Example 1:
 *  SYNCHELP_READ_BEGIN();
 *  SYNCHELP_READ_FLOAT(size);
 *  SYNCHELP_READ_STRING( textureName, 1024 ); //1024 is the length of textureName
 *
 * Example 2:
 *  SYNCHELP_WRITE_BEGIN();
 *  SYNCHELP_WRITE_FLOAT(this->size);
 *  SYNCHELP_WRITE_STRING(this->textureName);
 *  return SYNCHELP_WRITE_N;
 *
 */
#define SYNCHELP_WRITE_BEGIN()    int __synchelp_write_i = 0; \
                                  int __synchelp_write_n
#define SYNCHELP_WRITE_INT(i) { __synchelp_write_n = \
                                Converter::intToByteArray( i, data+__synchelp_write_i, maxLength-__synchelp_write_i ); \
                                assert( __synchelp_write_n == INTSIZE ); \
                                if ( __synchelp_write_n <= 0) \
{ \
                                  PRINTF(1)("Buffer is too small to store a int\n"); \
                                  return 0; \
} \
                                __synchelp_write_i += __synchelp_write_n; \
}
#define SYNCHELP_WRITE_FLOAT(f) { __synchelp_write_n = \
                                Converter::floatToByteArray( f, data+__synchelp_write_i, maxLength-__synchelp_write_i ); \
                                assert( __synchelp_write_n == FLOATSIZE ); \
                                if ( __synchelp_write_n <= 0) \
{ \
                                  PRINTF(1)("Buffer is too small to store a float\n"); \
                                  return 0; \
} \
                                __synchelp_write_i += __synchelp_write_n; \
}
#define SYNCHELP_WRITE_BYTE(b) { \
                                if (maxLength - __synchelp_write_i < 1) \
{ \
                                  PRINTF(1)("Buffer is too small to store string\n"); \
                                  return 0; \
} \
                                data[__synchelp_write_i] = b; \
                                __synchelp_write_i++; \
}
#define SYNCHELP_WRITE_STRING(s) { if (s!=NULL) {\
                                __synchelp_write_n = \
                                Converter::stringToByteArray( s, data+__synchelp_write_i, strlen(s), maxLength-__synchelp_write_i ); \
                                assert( __synchelp_write_n == strlen(s)+INTSIZE ); \
                                } else {\
                                __synchelp_write_n = \
                                Converter::stringToByteArray( "", data+__synchelp_write_i, strlen(""), maxLength-__synchelp_write_i ); \
                                assert( __synchelp_write_n == strlen("")+INTSIZE ); } \
                                if ( __synchelp_write_n <= 0) \
{ \
                                  PRINTF(1)("Buffer is too small to store string\n"); \
                                  return 0; \
} \
                                __synchelp_write_i += __synchelp_write_n; \
}
#define SYNCHELP_WRITE_N        __synchelp_write_i
#define SYNCHELP_WRITE_FKT(f)   { \
                                  __synchelp_write_i += \
                                  f( data+__synchelp_write_i, maxLength-__synchelp_write_i ); \
                                }


#define SYNCHELP_READ_BEGIN()     int __synchelp_read_i = 0; \
                                  int __synchelp_read_n

#define SYNCHELP_READ_INT(i)       { \
                                    if ( length-__synchelp_read_i < INTSIZE ) \
{ \
                                      PRINTF(1)("There is not enough data to read an int\n");  \
                                      return 0; \
} \
                                    __synchelp_read_n = Converter::byteArrayToInt( data+__synchelp_read_i, &i );  \
                                    assert( __synchelp_read_n == INTSIZE ); \
                                    __synchelp_read_i += __synchelp_read_n; \
}
#define SYNCHELP_READ_FLOAT(f)    { \
                                    if ( length-__synchelp_read_i < FLOATSIZE ) \
{ \
                                      PRINTF(1)("There is not enough data to read a flaot\n");  \
                                      return 0; \
} \
                                    __synchelp_read_n = Converter::byteArrayToFloat( data+__synchelp_read_i, &f );  \
                                    assert( __synchelp_read_n == FLOATSIZE ) ;\
                                    __synchelp_read_i += __synchelp_read_n; \
}
#define SYNCHELP_READ_STRING(s,l)    { \
                                    __synchelp_read_n = Converter::byteArrayToString( data+__synchelp_read_i, s, l );  \
                                    assert( __synchelp_read_n == strlen(s)+INTSIZE ) ;\
                                    if ( __synchelp_read_n <0 )  \
{ \
                                      PRINTF(1)("There is not enough data to read string\n");  \
                                      return 0; \
} \
                                    __synchelp_read_i += __synchelp_read_n; \
}
#define SYNCHELP_READ_STRINGM(s)    { \
                                    __synchelp_read_n = Converter::byteArrayToStringM( data+__synchelp_read_i, s );  \
                                    assert( __synchelp_read_n == strlen(s)+INTSIZE ) ;\
                                    if ( __synchelp_read_n <0 )  \
{ \
                                      PRINTF(1)("There is not enough data to read string\n");  \
                                      return 0; \
} \
                                    __synchelp_read_i += __synchelp_read_n; \
}
#define SYNCHELP_READ_BYTE(b)      { \
                                    if ( length-__synchelp_read_i < 1 ) \
{ \
                                      PRINTF(1)("There is not enough data to read a byte\n");  \
                                      return 0; \
} \
                                    b = data[__synchelp_read_i]; \
                                    __synchelp_read_i ++;  \
}
#define SYNCHELP_READ_FKT(f)   { \
                                  __synchelp_read_i += \
                                  f( data+__synchelp_read_i, length-__synchelp_read_i, sender); \
                                  }
#define SYNCHELP_READ_N           __synchelp_read_i

class NetworkStream;


class Synchronizeable : virtual public BaseObject
{

  public:
    Synchronizeable();
    virtual ~Synchronizeable();

    virtual int       writeBytes(const byte* data, int length, int sender);
    virtual int       readBytes(byte* data, int maxLength, int * reciever);
    virtual void      writeDebug() const;
    virtual void      readDebug() const;

    void setIsServer( bool isServer );
    void setIsOutOfSync( bool outOfSync );
    void setRequestedSync( bool requestedSync );
    bool isServer();
    bool isOutOfSync();
    bool requestedSync();

    inline void setUniqueID( int id ){ uniqueID = id; }
    inline int  getUniqueID() const { return uniqueID; }
    inline int getHostID() { return this->hostID; }

    inline int getOwner(){ return owner; }
    inline void setOwner(int owner){ this->owner = owner; }

    /** @returns true if this Synchronizeable has to be synchronized over network */
    inline bool beSynchronized() { return this->bSynchronize; }
    /** @param bSynchronize sets the Synchronizeable to be sunchronized or not */
    inline void setSynchronized(bool bSynchronize) { this->bSynchronize = bSynchronize; }

    inline void requestSync( int hostID ){ this->synchronizeRequests.push_back( hostID ); }
    inline int getRequestSync( void ){ if ( this->synchronizeRequests.size()>0 ){ int n = *(synchronizeRequests.begin()); synchronizeRequests.pop_front(); return n; } else { return -1; } };

    inline void setNetworkStream(NetworkStream* stream) { this->networkStream = stream; }
    inline NetworkStream* getNetworkStream() { return this->networkStream; }


  protected:
    NetworkStream*    networkStream;
    int               state;


  private:
    int               uniqueID;
    int               owner;
    int               hostID;
    bool              bSynchronize;

    std::list<int>    synchronizeRequests;

};
#endif /* _SYNCHRONIZEABLE_H */