/**************************************************************************
 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
 *                                                                        *
 * Author: The ALICE Off-line Project.                                    *
 * Contributors are mentioned in the code where appropriate.              *
 *                                                                        *
 * Permission to use, copy, modify and distribute this software and its   *
 * documentation strictly for non-commercial purposes is hereby granted   *
 * without fee, provided that the above copyright notice appears in all   *
 * copies and that both the copyright notice and this permission notice   *
 * appear in the supporting documentation. The authors make no claims     *
 * about the suitability of this software for any purpose. It is          *
 * provided "as is" without express or implied warranty.                  *
 **************************************************************************/

/* $Id$ */

#include "AliMUONDigitMapA1.h"
#include "AliMUONDigit.h"

#include "AliLog.h"

#include <TObjArray.h>
#include <TMath.h>

ClassImp(AliMUONDigitMapA1)

AliMUONDigitMapA1::AliMUONDigitMapA1() 
  : fIdDE(0),
    fNpx(0),
    fNpy(0),
    fDigits(0),
    fMaxIndex(0),
    fHitMap(0)
{
    // Default constructor

}
//________________________________________________________________________________
AliMUONDigitMapA1::AliMUONDigitMapA1(Int_t idDE, Int_t npx, Int_t npy )
{
// Constructor with new segmentation

   fIdDE = idDE;
   fNpx = npx;
   fNpy = npy;
   fMaxIndex = fNpx * fNpy + fNpx ;
    
   fHitMap = new Int_t[fMaxIndex];
   Clear();

}
//______________________________________________________________
AliMUONDigitMapA1::AliMUONDigitMapA1(const AliMUONDigitMapA1& hitMap)
  : TObject(hitMap)
{
// Protected copy constructor

  AliFatal("Not implemented.");
}
//_________________________________
AliMUONDigitMapA1::~AliMUONDigitMapA1()
{
// Destructor
    if (fHitMap) delete[] fHitMap;
}
//______________________________________
void AliMUONDigitMapA1::Clear(const char *)
{
// Clear hitmap
    memset(fHitMap,0,sizeof(int)*fMaxIndex);
}

//_________________________________________________________
Int_t AliMUONDigitMapA1::CheckedIndex(Int_t ix, Int_t iy) const
{
// Return checked indices ix, iy
  Int_t index =  iy * fNpx + ix;
    if ( index < 0 || index >= fMaxIndex ) {
      AliWarning(Form("index outside array idDE %d ix %d iy %d MaxIndex %d index %d Npx %d Npy %d",
		      fIdDE, ix,iy, fMaxIndex, index, fNpx, fNpy));
	return  fMaxIndex-1;
    } else {
	return index;
    }
}
//_____________________________
void  AliMUONDigitMapA1::FillHits(TObjArray* digits)
{
// Fill hits from digits list  
    fDigits = digits;
    Int_t ndigits = fDigits->GetEntriesFast();
    if (!ndigits) return;
    AliMUONDigit *dig;
    for (Int_t ndig = 0; ndig < ndigits; ndig++) {
	dig = (AliMUONDigit*)fDigits->UncheckedAt(ndig);
	SetHit(dig->PadX(),dig->PadY(),ndig);
    }
}
//___________________________________________________________
void  AliMUONDigitMapA1::SetHit(Int_t ix, Int_t iy, Int_t idigit)
{
// Assign digit to hit cell ix,iy

    fHitMap[CheckedIndex(ix, iy)] = idigit + 1;
}
//_______________________________________________
void AliMUONDigitMapA1::DeleteHit(Int_t ix, Int_t iy)
{
// Delete hit at cell ix,iy

    fHitMap[CheckedIndex(ix, iy)]=0;
}
//_____________________________________________
void AliMUONDigitMapA1::FlagHit(Int_t ix, Int_t iy)
{
// Flag hit as used
    fHitMap[CheckedIndex(ix, iy)]=
	-TMath::Abs(fHitMap[CheckedIndex(ix, iy)]);
}
//________________________________________________________
Int_t AliMUONDigitMapA1::GetHitIndex(Int_t ix, Int_t iy) const
{
// Get absolute value of contents of hit cell ix,iy
    return TMath::Abs(fHitMap[CheckedIndex(ix, iy)])-1;
}
//_______________________________________________________
TObject* AliMUONDigitMapA1::GetHit(Int_t ix, Int_t iy) const
{
    // Get pointer to object at hit cell ix, iy
    // Force crash if index does not exist ! (Manu)
    Int_t index = GetHitIndex(ix,iy);
    return (index <0) ? 0 : fDigits->UncheckedAt(GetHitIndex(ix,iy));
}
//_________________________________________________
FlagType AliMUONDigitMapA1::TestHit(Int_t ix, Int_t iy)
{
// Check if hit cell is empty, used or unused
//
    Int_t index = CheckedIndex(ix, iy);
    if (index<0 || index >= fMaxIndex) return kEmpty;

    Int_t inf = fHitMap[index];
    if (inf < 0) {
	return kUsed;
    } else if (inf == 0) {
	return kEmpty;
    } else {
	return kUnused;
    }
}
//________________________________________________________________________
AliMUONDigitMapA1 & AliMUONDigitMapA1::operator = (const AliMUONDigitMapA1 & rhs) 
{
// Protected assignement operator

  if (this == &rhs) return *this;

  AliFatal( "Not implemented.");
    
  return *this;  
}