// -------------------------------------------------------------------------
// -----                       PndFts source file                      -----
// -------------------------------------------------------------------------

#include "PndFts.h"

#include "PndGeoFtsPar.h"
#include "PndGeoFts.h"
#include "PndDetectorList.h"
#include "PndStack.h"
#include "PndFtsMapCreator.h"

#include "FairRun.h"
#include "FairGeoInterface.h"
#include "FairGeoLoader.h"
#include "FairGeoNode.h"
#include "FairGeoRootBuilder.h"
#include "FairRootManager.h"
#include "FairRuntimeDb.h"
#include "FairVolume.h"

#include "TClonesArray.h"
#include "TLorentzVector.h"
#include "TParticle.h"
#include "TVirtualMC.h"
#include "TGeoMatrix.h"
#include "TObjArray.h"
#include "TGeoTube.h"

#include <iostream>

using std::cout;
using std::endl;
using std::string;

// TODO: read this from geant initialization
#define innerStrawDiameter 1.
//#define redefineLambdaChargedDecay 0

// -----   Default constructor   -------------------------------------------
PndFts::PndFts() 
{
    fFtsCollection = new TClonesArray("PndFtsPoint");
    fPosIndex = 0;
    fVerboseLevel = 1;
    fIsInitialized = kFALSE;
}
// -------------------------------------------------------------------------



// -----   Standard constructor   ------------------------------------------
PndFts::PndFts(const char* name, Bool_t active)
  : FairDetector(name, active) 
{
    fFtsCollection = new TClonesArray("PndFtsPoint");
    fPosIndex = 0;
    fVerboseLevel = 1;
    fIsInitialized = kFALSE;
}
// -------------------------------------------------------------------------




// -----   Destructor   ----------------------------------------------------
PndFts::~PndFts() 
{
    if (fFtsCollection) 
    {
	fFtsCollection->Delete(); 
	delete fFtsCollection;
    }
}
// -------------------------------------------------------------------------


// -----   Private method GetSquaredDistanceFromWire -----------------------
float PndFts::GetSquaredDistanceFromWire()
{
    TLorentzVector
	entryPosition;  
    
    float
	positionInMother[3],
	positionInStraw[3];
    
    gMC->TrackPosition(entryPosition);
    positionInMother[0] = entryPosition.X();
    positionInMother[1] = entryPosition.Y();
    positionInMother[2] = entryPosition.Z();
    gMC->Gmtod(positionInMother, positionInStraw, 1);
    
    return positionInStraw[0] * positionInStraw[0] + 
	positionInStraw[1] * positionInStraw[1];
}
// -------------------------------------------------------------------------

bool PndFts::Split(string &aDest, string &aSrc, char aDelim)
{
   if(aSrc.empty())
      return false;

   string::size_type 
       pos = aSrc.find(aDelim);

   aDest = aSrc.substr(0, pos);

   if(pos != string::npos)
       aSrc = aSrc.substr(pos + 1);
   else
       aSrc = "";

   return true;
}

string PndFts::GetStringPart(string &aSrc, Int_t part, char aDelim)
{	
    string 
	retval = "",
	sub;

    int
	counter = 0;

    while(Split(sub, aSrc, aDelim))
    {
	if (counter == part)
	{
	    retval = sub;
	    break;
	}
	counter++;
    }

    return retval;
}

// -----   Public method ProcessHits  --------------------------------------
Bool_t  PndFts::ProcessHits(FairVolume* vol)
{
  
  //new>>>>>>>>>>>>>>>>>>
  //std::cout<<"ProcessHit PndFts####################################################"<<std::endl;

  TParticle* particle =  gMC->GetStack()->GetCurrentTrack();
  TGeoMedium *medium = (TGeoMedium*) vol->getGeoNode()->getRootVolume()->GetMedium();
  Double_t epsil = medium->GetParam(6);

  TString vol_name(gMC->CurrentVolName()); 
  //gMC->GetTransformation(gMC->CurrentVolPath(),M);
  TString name(gMC->CurrentVolName());
  
  //new>>>>>>>>>>>>>>>>>>
  
  if (gMC->TrackCharge() != 0.)
    {
      
      if ( gMC->IsTrackEntering() )
	{
	  valid = kTRUE;

	  // Set parameters at entrance of volume. Reset ELoss.
	  fELoss  = 0.;
	  fTime   = gMC->TrackTime() * 1.0e09;
	  fLength = gMC->TrackLength();
	  gMC->TrackPosition(fPos);
	  gMC->TrackMomentum(fMomIn);
	  gMC->TrackPosition(fpostotin);// da cancellare
	  Double_t globalPos[3] = {0., 0., 0.}; // stt1 modified
	  Double_t localPos[3] = {0., 0., 0.}; // stt1 modified
	  
	  globalPos[0] = fPos.X();
	  globalPos[1] = fPos.Y();
	  globalPos[2] = fPos.Z();
	  
	  gMC->Gmtod(globalPos, localPos, 1);
	  fPosInLocal.SetXYZM(localPos[0], localPos[1], localPos[2], 0.0);	    
	    
	}
      
      // Sum energy loss for all steps in the active volume
      fELoss += gMC->Edep();
      
      //std::cout<<"bool valid = "<<valid<<std::endl;

	// Create PndFtsPoint at exit of active volume -- but not into the wire
      if ( gMC->IsTrackExiting() && valid==kTRUE  )
      {
	//std::cout<<"sono nel ciclo"<<std::endl;
	valid=kFALSE;
	fTrackID  = gMC->GetStack()->GetCurrentTrackNumber();
	fVolumeID = kFTS;//vol->getMCid();

	  if(fTrackID !=0){
	    if (fVerboseLevel>2) std::cout<<"test Vol----------"<<vol->getMCid()<<std::endl;
	    if (fVerboseLevel>2) std::cout<<"fTrackID-----"<<fTrackID<<std::endl;
	  }

	  fMass = gMC->TrackMass();   // mass (GeV)
	  gMC->TrackPosition(fPosOut);
	  gMC->TrackMomentum(fMomOut);
	  gMC->TrackPosition(fpostotout);// da cancellare
	  Double_t globalPos[3] = {0., 0., 0.}; // stt1 modified
	  Double_t localPos[3] = {0., 0., 0.}; // stt1 modified
	  
	  gMC->Gdtom(localPos, globalPos, 1);
	  
	  fPos.SetXYZM(globalPos[0], globalPos[1], globalPos[2], 0.0);
	  
	  globalPos[0] = fPosOut.X();
	  globalPos[1] = fPosOut.Y();
	  globalPos[2] = fPosOut.Z();
	  
	  gMC->Gmtod(globalPos, localPos, 1);
	  fPosOutLocal.SetXYZM(localPos[0], localPos[1], localPos[2], 0.0);
	  	  
	  // string basename("stt1tube");
	  string basename;
	  TString volumename;
	  string
	    hashmark("#"),
	    volName,
	    fullName,
	    number,
	    specialname,
	    volPath(gMC->CurrentVolPath()),
	    volPath2(gMC->CurrentVolPath());
	  
	  volumename = volPath;
	  volName = GetStringPart(volPath, 2, '/');
	  number = GetStringPart(volName, 1, '_');	

	  Int_t start =volPath2.find("fts",0);
	  specialname = volPath2.substr(start,volPath2.find("_",start)-start);
	    
	  if(volumename.Contains("fts01")) basename = "fts01tube";
	  if(volumename.Contains("fts031")) basename = "fts031tube";
	  if(volumename.Contains("fts032")) basename = "fts032tube";
	  if(volumename.Contains("fts033")) basename = "fts033tube";
	  if(volumename.Contains("fts034")) basename = "fts034tube";
	  if(volumename.Contains("fts035")) basename = "fts035tube";
	  if(volumename.Contains("fts036")) basename = "fts036tube";
	  if(volumename.Contains("fts037")) basename = "fts037tube";
	  if(volumename.Contains("fts038")) basename = "fts038tube";
          if(volumename.Contains("fts05")) basename = "fts05tube";
	  if(volumename.Contains("fts06")) basename = "fts06tube";
	  
	  fullName = basename + hashmark + number;
	 
	  FairGeoNode 
	    *volnode = dynamic_cast<FairGeoNode*> (fPassNodes->FindObject(fullName.c_str()));	  
	  if (!volnode)
	    {
	      cout << "-I- PndFts: No volume " << fullName.c_str() << " found in geometry container."  << endl;
	      return kFALSE;
	    }
	    

	  if(fTrackID!=0){
	    if (fVerboseLevel>2) std::cout<<"sono prima del mapper------"<<std::endl;
	  }

	  fpostot.SetXYZM((fpostotin.X() +  fpostotout.X())/2., (fpostotin.Y() + fpostotout.Y())/2.,(fpostotin.Z() + fpostotout.Z())/2.,0.0);


         //CHECK map creator-------------------------------------------------
         PndFtsMapCreator *mapper = new PndFtsMapCreator(fGeoType);
	  Int_t tubeID=0;
	 //testTubeID=tube number as in the geometry file....
	 //we need to calculate the real number in order to have a different
	 //number for each tube (also for up and down short tubes)
	 Int_t testTubeID = mapper->GetTubeIDFromPath(gMC->CurrentVolPath());
	 Int_t chamberID=mapper->GetChamberIDFromPath(gMC->CurrentVolPath());
	 Int_t layerID=mapper->GetLayerID(chamberID,testTubeID,gMC->CurrentVolPath());
	 //std::cout<<"LAYERID==========="<<layerID<<std::endl;
	 //tubeID=at each tube corresponds only one id number.....
	 tubeID = mapper->GetTubeIDTot(chamberID,layerID,testTubeID,gMC->CurrentVolPath());
	 //std::cout<<"PndFts.cxx. chamber, tube ID = "<<chamberID<<" "<<tubeID<<" "<<testTubeID<<std::endl;
	 ////----------------------------------------------------------------

	  
	 AddHit(fTrackID, fVolumeID, tubeID, chamberID,layerID,
		 TVector3(fpostot.X(), fpostot.Y(), fpostot.Z()),
		 TVector3(fPosInLocal.X(),   fPosInLocal.Y(),   fPosInLocal.Z()),
		 TVector3(fPosOutLocal.X(),  fPosOutLocal.Y(),  fPosOutLocal.Z()),
		 TVector3(fMomIn.Px(),  fMomIn.Py(),  fMomIn.Pz()),
		 TVector3(fMomOut.Px(), fMomOut.Py(), fMomOut.Pz()),
		 fTime, fLength, fELoss, fMass); 

	 if (fTrackID !=0){
	   if (fVerboseLevel>2) std::cout<<"AddHit PndFts.cxx= "<<fTrackID<<std::endl;
	 }         


	 //Increment number of stt points for TParticle
	 PndStack* stack = (PndStack*) gMC->GetStack();
	 stack->AddPoint(kFTS);
	 ResetParameters();

	  

      }

    }
  
  return kTRUE;
}
// -------------------------------------------------------------------------



// -----   Public method EndOfEvent   --------------------------------------
void PndFts::EndOfEvent() 
{
    if (fVerboseLevel) 
	Print();
    fFtsCollection->Clear();
    fPosIndex = 0;
}
// -------------------------------------------------------------------------



// -----   Public method Register   ----------------------------------------
void PndFts::Register() 
{
    FairRootManager::Instance()->Register("FTSPoint", "Fts", fFtsCollection, kTRUE);
}
// -------------------------------------------------------------------------



// -----   Public method GetCollection   -----------------------------------
TClonesArray* PndFts::GetCollection(Int_t iColl) const 
{
    if (iColl == 0) 
	return fFtsCollection;
    else 
	return NULL;
}
// -------------------------------------------------------------------------



// -----   Public method Print   -------------------------------------------
void PndFts::Print() const 
{
    Int_t 
	nHits = fFtsCollection->GetEntriesFast();
    
    cout << "-I- PndFts: " << nHits << " points registered in this event."  << endl;
    
    if (fVerboseLevel>1)
	for (Int_t i=0; i<nHits; i++) 
	    (*fFtsCollection)[i]->Print();
}
// -------------------------------------------------------------------------



// -----   Public method Reset   -------------------------------------------
void PndFts::Reset() 
{
    fFtsCollection->Clear();
    ResetParameters();
}
// -------------------------------------------------------------------------



// -----   Public method CopyClones   --------------------------------------
void PndFts::CopyClones(TClonesArray* cl1, TClonesArray* cl2, Int_t offset)
{
    Int_t 
	nEntries = cl1->GetEntriesFast();
    
    cout << "-I- PndFts: " << nEntries << " entries to add." << endl;
    
    TClonesArray& clref = *cl2;
    
    PndFtsPoint
	*oldpoint = NULL;
    for (Int_t i=0; i<nEntries; i++) 
    {
	oldpoint = (PndFtsPoint*) cl1->At(i);
	
	Int_t 
	    index = oldpoint->GetTrackID() + offset;
	
	oldpoint->SetTrackID(index);
	new (clref[fPosIndex]) PndFtsPoint(*oldpoint);
	fPosIndex++;
    }
    cout << "-I- PndFts: " << cl2->GetEntriesFast() << " merged entries." 
	 << endl;
}
// -------------------------------------------------------------------------



// -----   Public method ConstructGeometry   -------------------------------
void PndFts::ConstructGeometry() 
{
  FairGeoLoader*    geoLoad = FairGeoLoader::Instance();
  FairGeoInterface* geoFace = geoLoad->getGeoInterface();
  PndGeoFts*       Geo  = new  PndGeoFts();
  Geo->setGeomFile(GetGeometryFileName());
  geoFace->addGeoModule(Geo);

  Bool_t rc = geoFace->readSet(Geo);
  if (rc) Geo->create(geoLoad->getGeoBuilder());

  TList* volList = Geo->getListOfVolumes();

  // store geo parameter
  FairRun *fRun = FairRun::Instance();
  FairRuntimeDb *rtdb= FairRun::Instance()->GetRuntimeDb();
  PndGeoFtsPar* par=(PndGeoFtsPar*)(rtdb->getContainer("PndGeoFtsPar"));
  TObjArray *fSensNodes = par->GetGeoSensitiveNodes();
  fPassNodes = par->GetGeoPassiveNodes();

  TListIter iter(volList);
  FairGeoNode* node   = NULL;
  FairGeoVolume *aVol=NULL;
  
  
  while( (node = (FairGeoNode*)iter.Next()) ) {
      aVol = dynamic_cast<FairGeoVolume*> ( node );
       if ( node->isSensitive()  ) {
           fSensNodes->AddLast( aVol );
       }else{
           fPassNodes->AddLast( aVol );
       }
  }

  std::cout<<"BBBB->"<<fSensNodes->GetEntries()<<std::endl;
  std::cout<<"cccc->"<<fPassNodes->GetEntries()<<std::endl;

  fGeoType = 1; // CHECK
  par->SetGeometryType(fGeoType);
  par->SetTubeInRad(0.5);    // cm
  par->SetTubeOutRad(0.001); // cm


  par->setChanged();
  par->setInputVersion(fRun->GetRunId(),1);
  ProcessNodes ( volList );
  
}
// -------------------------------------------------------------------------




// -----   Private method AddHit   -----------------------------------------
PndFtsPoint* PndFts::AddHit(Int_t trackID, Int_t detID, Int_t tubeID, Int_t chamberID, Int_t layerID,
			    TVector3 pos, TVector3 posInLocal, TVector3 posOutLocal, 
			    TVector3 momIn, TVector3 momOut,
			    Double_t time, Double_t length, Double_t eLoss,  Double_t mass)   // da cancellare postot
{
  TClonesArray& 
      clref = *fFtsCollection;

  Int_t 
      size = clref.GetEntriesFast();

  PndFtsPoint *pointnew = new(clref[size]) PndFtsPoint(trackID, detID, tubeID, chamberID, layerID, pos, posInLocal, posOutLocal,momIn, momOut, time, length, eLoss, mass);

   pointnew->SetTubeID(tubeID);
   pointnew->SetChamberID(chamberID);
   pointnew->SetLayerID(layerID);


}
// -------------------------------------------------------------------------

 

ClassImp(PndFts)