/**************************************************************************
 * 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.                  *
 **************************************************************************/
/*
 
 

 
 Author: R. GUERNANE LPSC Grenoble CNRS/IN2P3
*/

// --- ROOT system ---
#include <Riostream.h>
#include <TMath.h>

// --- AliRoot header files ---
#include "AliEMCALRawDigit.h"
#include "AliLog.h"

ClassImp(AliEMCALRawDigit)

//____________________________________________________________________________
AliEMCALRawDigit::AliEMCALRawDigit() : TObject(),
fId(-1),
fNSamples(0),
fSamples(0x0),
fAmplitude(0),
fTime(0)
{
	// default ctor 
}

//____________________________________________________________________________
AliEMCALRawDigit::AliEMCALRawDigit(Int_t id, Int_t timeSamples[], Int_t nSamples) : TObject(),
fId(id),
fNSamples(nSamples),
fSamples(0x0),
fAmplitude(0),
fTime(0)
{
	//
	fSamples = new Int_t[fNSamples];
	for (Int_t i = 0; i < fNSamples; i++) fSamples[i] = timeSamples[i];
}

//____________________________________________________________________________
AliEMCALRawDigit::~AliEMCALRawDigit() 
{
  //dtor, delete array of time samples
  if(fSamples) delete [] fSamples;
}

//____________________________________________________________________________
void AliEMCALRawDigit::Clear(Option_t *) 
{
  // clear, delete array of time samples
  if(fSamples) delete [] fSamples;
}


//____________________________________________________________________________
Bool_t AliEMCALRawDigit::GetTimeSample(const Int_t iSample, Int_t& timeBin, Int_t& amp) const
{
	// returns the time and amplitude of a given time sample and if the sample was ok
  
	if (iSample > fNSamples || iSample < 0) return kFALSE;
	
	amp     =  fSamples[iSample] & 0xFFF;
	timeBin = (fSamples[iSample] >> 12) & 0xFF;

	return kTRUE;
}

//____________________________________________________________________________
void AliEMCALRawDigit::SetTimeSamples(const Int_t timeSamples[], const Int_t nSamples) 
{
  // Sets the time samples
  
	if (fSamples) 
	{
		AliDebug(1,"Samples already filled: delete first!");
		fNSamples = 0;
		delete [] fSamples;
	}
	
	fNSamples = nSamples;
	fSamples = new Int_t[fNSamples];
	for (Int_t i = 0; i < fNSamples; i++) fSamples[i] = timeSamples[i];
}

//____________________________________________________________________________
Bool_t AliEMCALRawDigit::GetMaximum(Int_t& amplitude, Int_t& time) const
{
	// Checks the maximum amplitude in the time sample
  
	if (!fNSamples)
	{
		AliDebug(1,"Digit has no time sample");
		return kFALSE;
	}
		
	amplitude = 0;
	for (Int_t i = 0; i < fNSamples; i++)
	{
		Int_t t, a;
		if (GetTimeSample(i, t, a))
		{
			if (a > amplitude)
			{
				amplitude = a;
				time      = t;
			}
		}
	}
	
	return kTRUE;
}

//____________________________________________________________________________
Int_t AliEMCALRawDigit::Compare(const TObject * obj) const
{
	// Compares two digits with respect to its Id
	// to sort according increasing Id
	
	Int_t rv=0;
	
	AliEMCALRawDigit* digit = (AliEMCALRawDigit*)obj; 
	
	Int_t iddiff = fId - digit->GetId();
	
	if (iddiff > 0) 
		rv =  1;
	else if (iddiff < 0)
		rv = -1; 
	else
		rv =  0;
	
	return rv; 
}

//____________________________________________________________________________
void AliEMCALRawDigit::Print(const Option_t* /*opt*/) const
{
	// print
  
	printf("===\n| Digit id: %4d / %d Time Samples: \n",fId,fNSamples);
	for (Int_t i=0; i < fNSamples; i++) 
	{
		Int_t timeBin=-1, amp=0;
		GetTimeSample(i, timeBin, amp);
		printf("| (%d,%d) ",timeBin,amp);
	}
	
	printf("\n");
}