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

/* $Id$ */

///////////////////////////////////////////////////////////////////////////
//                                                                       //
//                          V-Zero   Detector                            //
//  This class contains the base procedures for the VZERO  detector      //
//  Default geometry of November 2003 :   V0R box is 4.4 cm thick        //
//                                  scintillators are 2 cm thick         //
//  All comments should be sent to Brigitte CHEYNIS :                    //
//                                 b.cheynis@ipnl.in2p3.fr               //
//                                                                       //
//                                                                       //
///////////////////////////////////////////////////////////////////////////


// --- Standard libraries ---
#include <Riostream.h>
#include <stdlib.h>

// --- ROOT libraries ---
#include <TNamed.h>
#include "TROOT.h"
#include "TFile.h"
#include "TNetFile.h"
#include "TRandom.h"
#include "TTree.h"
#include "TBranch.h"
#include "TClonesArray.h"
#include "TStopwatch.h"

// --- AliRoot header files ---
#include "AliRun.h"
#include "AliMC.h"
#include "AliVZERO.h"
#include "AliVZEROLoader.h"
#include "AliVZERODigitizer.h"
#include "AliVZEROBuffer.h"
#include "AliRunDigitizer.h"
#include "AliVZEROdigit.h"

ClassImp(AliVZERO)
 
//_____________________________________________________________________________
AliVZERO::AliVZERO(const char *name, const char *title)
       : AliDetector(name,title)
{
  //
  // Standard constructor for VZERO Detector
  //
  
  //  fIshunt       =  1;  // All hits are associated with primary particles  
   
  fHits         =  new TClonesArray("AliVZEROhit", 400);
  fDigits       =  new TClonesArray("AliVZEROdigit",400); 
   
  gAlice->GetMCApp()->AddHitList(fHits);

  fThickness    =  4.4;   // total thickness of the V0R box in cm
  fThickness1   =  2.0;   // thickness of scintillating cells in cm
  
  fMaxStepQua   =  0.05; 
  fMaxStepAlu   =  0.01; 
  
  fMaxDestepQua =  -1.0;
  fMaxDestepAlu =  -1.0;
  
  SetMarkerColor(kRed);
}

//_____________________________________________________________________________
AliVZERO::~AliVZERO()
{
  //
  // Default destructor for VZERO Detector
  //
  
    if (fHits) {
        fHits->Delete();
        delete fHits;
	fHits=0; }
    
    if (fDigits) {
        fDigits->Delete();
        delete fDigits;
        fDigits=0; }
}

//_____________________________________________________________________________
void AliVZERO::BuildGeometry()
{
  //
  // Builds simple ROOT TNode geometry for event display
  //
}
 
//_____________________________________________________________________________
void AliVZERO::CreateGeometry()
{
  //
  // Builds simple Geant3 geometry 
  //
}
//_____________________________________________________________________________
void AliVZERO::CreateMaterials()
{
  //
  // Creates materials used for Geant3 geometry 
  //
}

//_____________________________________________________________________________
Int_t AliVZERO::DistanceToPrimitive(Int_t /*px*/, Int_t /*py*/)
{
  //
  // Calculates the distance from the mouse to the VZERO on the screen
  // Dummy routine
  //
  
  return 9999;
}
 
//_____________________________________________________________________________
void AliVZERO::Init()
{
  //
  // Initialises the VZERO  class after it has been built
  //
}


//_____________________________________________________________________________
void AliVZERO::SetMaxStepQua(Float_t p1)
{
  //
  // Possible parametrisation of steps in active materials
  //
     fMaxStepQua = p1;
}

//_____________________________________________________________________________
void AliVZERO::SetMaxStepAlu(Float_t p1)
{
  //
  // Possible parametrisation of steps in Aluminum foils (not used in 
  // version v2)
  //
    fMaxStepAlu = p1;
}

//_____________________________________________________________________________
void AliVZERO::SetMaxDestepQua(Float_t p1)
{
  //
  // Possible parametrisation of steps in active materials (quartz)
  //
    fMaxDestepQua = p1;
}

//_____________________________________________________________________________
void AliVZERO::SetMaxDestepAlu(Float_t p1)
{
  //
  // Possible parametrisation of steps in Aluminum (not used in 
  // version v2)
  //
    fMaxDestepAlu = p1;
}

//_____________________________________________________________________________
AliLoader* AliVZERO::MakeLoader(const char* topfoldername)
{ 
  //
  // Builds VZEROgetter (AliLoader type)
  // if detector wants to use customized getter, it must overload this method
  //

  Info("MakeLoader","Creating AliVZEROLoader. Top folder is %s.",topfoldername);
  fLoader = new AliVZEROLoader(GetName(),topfoldername);
  return fLoader;
}

//_____________________________________________________________________________
void AliVZERO::SetTreeAddress()
{
  //
  // Sets tree address for hits.
  //
  if (fLoader->TreeH() && (fHits == 0x0))
    fHits = new  TClonesArray("AliVZEROhit", 400);

  AliDetector::SetTreeAddress();
}

//_____________________________________________________________________________
AliDigitizer* AliVZERO::CreateDigitizer(AliRunDigitizer* manager) const
{
  //
  // Creates a digitizer for VZERO
  //
  return new AliVZERODigitizer(manager);
}

//_____________________________________________________________________________
void AliVZERO::Hits2Digits(){
  //
  // Converts hits to digits of the current event
  //
  // Inputs file name
  Char_t *alifile = "galice.root";   

  // Create the run digitizer 
  AliRunDigitizer* manager = new AliRunDigitizer(1, 1);
  manager->SetInputStream(0, alifile);
  manager->SetOutputFile("H2Dfile");

  // Creates the VZERO digitizer 
  AliVZERODigitizer* dig = new AliVZERODigitizer(manager);

  // Creates the digits
  dig->Exec("");

}
//_____________________________________________________________________________
void AliVZERO::Digits2Raw()
{
  //
  // Converts digits of the current event to raw data
  //
  AliVZERO *fVZERO = (AliVZERO*)gAlice->GetDetector("VZERO");
  fLoader->LoadDigits();
  TTree* digits = fLoader->TreeD();
  if (!digits) {
    Error("Digits2Raw", "no digits tree");
    return;
  }
  TClonesArray * VZEROdigits = new TClonesArray("AliVZEROdigit",1000);
  fVZERO->SetTreeAddress();  		
  digits->GetBranch("VZERODigit")->SetAddress(&VZEROdigits); 
  
  const char *fileName    = "VZERO_3584.ddl";
  AliVZEROBuffer* buffer  = new AliVZEROBuffer(fileName);
  
  //  Verbose level
  //  0: Silent
  //  1: cout messages
  //  2: txt files with digits 
  //  BE CAREFUL, verbose level 2 MUST be used only for debugging and
  //  it is highly suggested to use this mode only for debugging digits files
  //  reasonably small, because otherwise the size of the txt files can reach
  //  quickly several MB wasting time and disk space.
  
  ofstream ftxt;
  buffer->SetVerbose(0);
  Int_t fVerbose = buffer->GetVerbose();

  Int_t nEntries = Int_t(digits->GetEntries());
  
  for (Int_t i = 0; i < nEntries; i++) {
  
    fVZERO->ResetDigits();
    digits->GetEvent(i);
    Int_t ndig = VZEROdigits->GetEntriesFast(); 
   
    if(ndig == 0) continue;
    if(fVerbose == 2) {ftxt.open("VZEROdigits.txt",ios::app);}
    for(Int_t k=0; k<ndig; k++){
        AliVZEROdigit* fVZERODigit = (AliVZEROdigit*) VZEROdigits->At(k);			
	Int_t ADC  = fVZERODigit->ADC();
	Int_t cell = fVZERODigit->CellNumber();
        if(fVerbose == 1) { cout <<"DDL: "<<fileName<< "\tdigit number: "<< k<<"\tcell: "
	                    <<cell<<"\tADC: "<< ADC << endl;} 
	if(fVerbose == 2) {
	    ftxt<<"DDL: "<<fileName<< "\tdigit number: "<< k<<"\tcell: "
	                   <<cell<<"\tADC: "<< ADC << endl;	      
	}
        buffer->WriteBinary(cell, ADC);
    }
  if(fVerbose==2) ftxt.close();
  }

  delete buffer;
  fLoader->UnloadDigits();
}