/*------------------------------------------------------------------------
  This is a little helper module for SICS which implements some
  status display support functions.

  COPYRIGHT: see file COPYRIGHT
 
  Extracted from nextrics 

  Mark Koennecke, August 2004
--------------------------------------------------------------------------*/
#include "tricssupport.h"
#include "napi.h"
#include "HistMem.h"


#define NEWFRAME 1166                              
/*------------------------------------------------------------------------
  a data structure plus support functions
  ------------------------------------------------------------------------*/
typedef struct {
  pObjectDescriptor pDes;
  pICallBack pCall;
} TricsSupport, *pTricsSupport;
/*----------------------------------------------------------------------*/
static pTricsSupport CreateTricsSupport(){
  pTricsSupport pNew = NULL;

  pNew = (pTricsSupport)malloc(sizeof(TricsSupport));
  if(pNew == NULL){
    return NULL;
  }
  memset(pNew,0,sizeof(TricsSupport));

  pNew->pDes = CreateDescriptor("TricsSupport");
  pNew->pCall = CreateCallBackInterface();
  if(pNew->pDes == NULL || pNew->pCall == NULL){
    free(pNew);
    return NULL;
  }
  return pNew;
}
/*--------------------------------------------------------------------*/
static void KillTricsSupport(void *pData){
  pTricsSupport pNew = (pTricsSupport)pData;

  if(pNew != NULL){
    if(pNew->pDes != NULL){
      DeleteDescriptor(pNew->pDes);
      pNew->pDes = NULL;
    }
    if(pNew->pCall != NULL){
      DeleteCallBackInterface(pNew->pCall);
      pNew->pCall = NULL;
    }
  }
}
/*=====================================================================*/
static int FrameSupInterest(int iEvent, void *pEvent, void *pUser,
			    commandContext cc){
     SConnection *pCon = NULL;
     int *iFrame;
     char pBueffel[512];
     
     if(iEvent != NEWFRAME){
       return 0;
     }
     
     pCon = (SConnection *)pUser;
     iFrame  = (int *)pEvent;
     assert(pCon);
     sprintf(pBueffel,"framenumber = %d",*iFrame);
     SCPushContext2(pCon,cc);
     SCWrite(pCon,pBueffel,eWarning);
     SCPopContext(pCon);
     return 1;        
}
/*======================================================================
  NexusGetFrame opens a TRICS NeXus file and retrieves a frame for the
  specified detector from it. This is a special feature for the 
  status display.
  ---------------------------------------------------------------------------*/
static int NexusGetFrameSup(SConnection *pCon, char *filename, 
                           int iDetector, int iFrame){
      char pBueffel[132];
      int iRet, type, rank, iDim[2];
      NXhandle hfil;
      HistInt *lData = NULL;

      /* do a few range checks */
      if(iDetector < 1 || iDetector > 3){
	sprintf(pBueffel,"ERROR: unknown detector %d requested",iDetector);
	SCWrite(pCon,pBueffel,eError);
        return 0; 
      }

      /* open file */
      iRet = NXopen(filename,NXACC_READ,&hfil);
      if(iRet != NX_OK){
        sprintf(pBueffel,"ERROR: cannot open %s",filename);
        SCWrite(pCon,pBueffel,eError);
        return 0;
      }       

      snprintf(pBueffel,131,"/frame%4.4d/detector%1.1d/counts",iFrame, 
	       iDetector);
      iRet = NXopenpath(hfil,pBueffel);
      if(iRet != NX_OK){
	  sprintf(pBueffel,"ERROR: frame %d, detector %d not found in %s",
		  iFrame, iDetector, 
		  filename);
          SCWrite(pCon,pBueffel,eError);
          NXclose(&hfil);
          return 0;
      }
      NXgetinfo(hfil,&rank,iDim,&type);

      lData = (HistInt *)malloc(iDim[0]*iDim[1]*sizeof(HistInt));
      if(!lData){
	SCWrite(pCon,"ERROR: out of memory in NexusGetFrame",eError);
        NXclose(&hfil);
        return 0;
      }   
      memset(lData,0,iDim[0]*iDim[1]*sizeof(HistInt));
      iRet = NXgetdata(hfil,lData);
      if(iRet != NX_OK){
          SCWrite(pCon,"ERROR: failed to read data",eError);
          NXclose(&hfil);
          return 0;
      }

      /* send it */
      sprintf(pBueffel,"detector%1.1d",iDetector);
      SCWriteZipped(pCon,pBueffel,lData,iDim[0]*iDim[1]*sizeof(HistInt));

      /* clean up */
      NXclose(&hfil);
      free(lData);
      return 1;
} 
/*----------------------------------------------------------------------*/
int MakeTricsSupport(SConnection *pCon, SicsInterp *pSics, void *pData,
		     int argc, char *argv[]){
  pTricsSupport pNew = NULL;

  pNew = CreateTricsSupport();
  if(!pNew){
    SCWrite(pCon,"ERROR: out of memory creating TricsSupport",eError);
    return 0;
  }
  if(AddCommand(pSics,"tricssupport",TricsSupportAction,KillTricsSupport,
		pNew) != 1){
    SCWrite(pCon,"ERROR: duplicate command tricssupport not created",eError);
    return 0;
  }
  SCSendOK(pCon);
  return 1;
}
/*-----------------------------------------------------------------------*/
int TricsSupportAction(SConnection *pCon, SicsInterp *pSics, void *pData,
		       int argc, char *argv[]){
  int iDet, iFrame, iRet;
  long lID;
  char pBueffel[131];
  pTricsSupport self = (pTricsSupport)pData;

  assert(self);

  /* check for subcommands */
  if(argc < 2){
    snprintf(pBueffel,130,"ERROR: no subcommand found for %s",argv[0]);
    SCWrite(pCon,pBueffel,eError);
    return 0;
  }
  
  strtolower(argv[1]);
  if(strcmp(argv[1],"oldframe") == 0){
    if(argc < 5){
      SCWrite(pCon,"ERROR: insufficient number of arguments to oldframe",
	      eError);
      return 0;
    }
    iDet = atoi(argv[3]);
    iFrame = atoi(argv[4]);
    iRet = NexusGetFrameSup(pCon,argv[2],iDet, iFrame);
    return 1; 
  }
  else if(strcmp(argv[1],"interest") == 0){
    lID = RegisterCallback(self->pCall, SCGetContext(pCon),
			   NEWFRAME, FrameSupInterest,
                           pCon, NULL);
    SCRegister(pCon,pSics, self->pCall,lID);
    SCSendOK(pCon);
    return 1; 
  } else if(strcmp(argv[1],"newframe") == 0){
    if(argc < 3){
      SCWrite(pCon,
       "ERROR: insufficient number of arguments to tricsupport newframe", 
	      eError);
      return 0;
    }
    iFrame = atoi(argv[2]);
    InvokeCallBack(self->pCall, NEWFRAME,&iFrame);  
    SCSendOK(pCon);
    return 1;
  } else {
    SCWrite(pCon,"ERROR: subcommand to tricssuport not understood",eError);
    return 0; 
  }
}