/**************************************************************************
* 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.                  *
**************************************************************************/
//
// Class AliHFEtaggedTrackAnalysis
// Analyses tracks with an apriori PID information (i.e. using the daugther
// tracks from well-identified decays of neutral charged particles). Tracks
// are processed in the Process function, where given tracks are filtered 
// via the track cuts and used for PID later. The plugin fills Correction
// Framework containers and additional PID QA containers
//
// Author:
//   Markus Fasel <M.Fasel@gsi.de>
//
#include "AliCFCutBase.h"
#include "AliCFContainer.h"
#include "AliCFManager.h"
#include "AliLog.h"
#include "AliPID.h"

#include "AliHFEcontainer.h"
#include "AliHFEcuts.h"
#include "AliHFEpid.h"
#include "AliHFEpidQAmanager.h"
#include "AliHFEtaggedTrackAnalysis.h"
#include "AliHFEvarManager.h"

ClassImp(AliHFEtaggedTrackAnalysis)

//____________________________________________________________
AliHFEtaggedTrackAnalysis::AliHFEtaggedTrackAnalysis():
    TObject()
  , fVarManager(NULL)
  , fContainer(NULL)
  , fPID(NULL)
  , fPIDqa(NULL)
  , fCuts(NULL)
  , fCFM(NULL)
{
  //
  // Default constructor
  //
  fVarManager = new AliHFEvarManager("taggedTrackVarManager");
  fVarManager->AddVariable("pt");
  fVarManager->AddVariable("eta");
  fVarManager->AddVariable("phi");
  fVarManager->AddVariable("charge");
  fVarManager->AddVariable("species");
  fPIDqa = new AliHFEpidQAmanager;
  fCFM = new AliCFManager;
  SetBit(kIsOwner, kTRUE);
}

//____________________________________________________________
AliHFEtaggedTrackAnalysis::AliHFEtaggedTrackAnalysis(const AliHFEtaggedTrackAnalysis &ref):
    TObject(ref)
  , fVarManager(ref.fVarManager)
  , fContainer(NULL)
  , fPID(ref.fPID)
  , fPIDqa(ref.fPIDqa)
  , fCuts(ref.fCuts)
  , fCFM(ref.fCFM)
{
  //
  // Copy constructor
  //
  if(ref.fContainer){
    InitContainer();
  }
  SetBit(kIsOwner, kFALSE);
}

//____________________________________________________________
AliHFEtaggedTrackAnalysis &AliHFEtaggedTrackAnalysis::operator=(const AliHFEtaggedTrackAnalysis &ref){
  //
  // Assignment operator
  //
  if(&ref != this){
    fVarManager = ref.fVarManager;
    fPID = ref.fPID;
    fPIDqa = ref.fPIDqa;
    fCuts = ref.fCuts;
    fCFM = ref.fCFM;

    if(ref.fContainer) InitContainer();
   
    SetBit(kIsOwner, kFALSE); 
    SetBit(kIsOwnerCuts, kFALSE);
  }
  return *this;
}

//____________________________________________________________
AliHFEtaggedTrackAnalysis::~AliHFEtaggedTrackAnalysis(){
  //
  // Destructor
  //
  if(TestBit(kIsOwner)){
    if(fVarManager) delete fVarManager;
    if(fPIDqa) delete fPIDqa;
  }
  if(TestBit(kIsOwnerCuts)) delete fCuts;
  if(fContainer) delete fContainer;
}

//____________________________________________________________
void AliHFEtaggedTrackAnalysis::InitContainer(){
  //
  // Initialize output container
  //
  if(fContainer) return;
  Int_t nStepPID = 0;
  if(!fPID){
    AliError("No PID set - defining container without PID steps");
  } else {
    nStepPID = fPID->GetNumberOfPIDdetectors();
  }
  fContainer = new AliHFEcontainer("containerV0");
  fVarManager->DefineVariables(fContainer);
  fContainer->CreateContainer("taggedTrackContainerReco", "Container for Tagged Tracks", AliHFEcuts::kNcutStepsRecTrack + nStepPID);

  // Set the step titles
  for(Int_t istep = 0; istep < AliHFEcuts::kNcutStepsRecTrack; istep++)
    fContainer->SetStepTitle("taggedTrackContainerReco", AliHFEcuts::RecoCutName(istep), istep);
  for(Int_t ipid = 0; ipid < nStepPID; ipid++){
    fContainer->SetStepTitle("taggedTrackContainerReco", fPID->SortedDetectorName(ipid), ipid + AliHFEcuts::kNcutStepsRecTrack);
  }
  fCFM->SetParticleContainer(fContainer->GetCFContainer("taggedTrackContainerReco"));
}

//____________________________________________________________
void AliHFEtaggedTrackAnalysis::ProcessTrack(AliVParticle *track, Int_t abinitioPID){
  //
  // Filter tracks tagged by V0 PID class
  //
  fVarManager->NewTrack(track, NULL, 0., abinitioPID, kTRUE);
  Int_t offset = AliHFEcuts::kStepRecKineITSTPC;
  fVarManager->FillContainer(fCFM->GetParticleContainer(), 0); // Fill Container without filtering
  
  Bool_t survived = kTRUE;
  for(Int_t icut = AliHFEcuts::kStepRecKineITSTPC; icut <= AliHFEcuts::kStepHFEcutsTRD; icut++){
    AliDebug(2, Form("Checking cut %d for species %s", icut + AliHFEcuts::kNcutStepsMCTrack, AliPID::ParticleName(abinitioPID)));
  /*
    TObjArray *cutlist = fCFM->GetParticleCutsList(icut + AliHFEcuts::kNcutStepsMCTrack);
    if(!cutlist){
      AliDebug(2, Form("No cuts for step %d set", icut + AliHFEcuts::kNcutStepsMCTrack));
    } else {
      AliDebug(2, Form("Cut Collection %s", cutlist->GetName()));
      TIter cutiter(cutlist);
      AliCFCutBase *cut;
      while((cut = dynamic_cast<AliCFCutBase *>(cutiter()))){
        AliDebug(2, Form("Cut object %s, QA on? %s", cut->GetName(), cut->IsQAOn() ? "yes" : "no"));
      }
    }
  */
    //if(!fCFM->CheckParticleCuts(icut + AliHFEcuts::kNcutStepsMCTrack, (TObject *)track)){
    if(!fCuts->CheckParticleCuts(icut + AliHFEcuts::kNcutStepsMCTrack, (TObject *)track)){
      AliDebug(2, Form("Track didn' survive cut %d", icut + AliHFEcuts::kNcutStepsMCTrack));
      survived = kFALSE;
      break;
    }
    AliDebug(2, Form("Cut passed, filling container %d", icut - offset + 1));
    fVarManager->FillContainer(fCFM->GetParticleContainer(), icut - offset + 1);
  }
  if(survived){
    AliDebug(2, "Use track in the PID");
    // Apply PID
    AliHFEpidObject hfetrack;
    hfetrack.SetAnalysisType(AliHFEpidObject::kESDanalysis);
    hfetrack.SetRecTrack(track);
    hfetrack.SetAbInitioPID(abinitioPID);
    fPID->SetVarManager(fVarManager);
    fPID->IsSelected(&hfetrack, fContainer, "taggedTrackContainer", fPIDqa);
  }
}

//____________________________________________________________
void AliHFEtaggedTrackAnalysis::SetCuts(AliHFEcuts *cuts){
  //
  // Set HFE cuts to be used to filter the tagged tracks
  //
  if(!cuts){
    AliWarning("Nob cuts provided - Using standard cuts");
    fCuts = new AliHFEcuts("cutsTagged", "HFE Cuts for the V0 tagged tracks");
    fCuts->CreateStandardCuts();
    fCuts->SetQAOn();
    SetBit(kIsOwnerCuts);
  }
  AliDebug(1, "Setting single track cuts");
  fCuts = cuts;
  const Int_t kNcutSteps = AliHFEcuts::kNcutStepsMCTrack + AliHFEcuts::kNcutStepsRecTrack + AliHFEcuts::kNcutStepsDETrack;
  printf("Setting Number of cut steps %d\n", kNcutSteps);
  fCFM->SetNStepParticle(kNcutSteps);
  for(Int_t istep = 0; istep < kNcutSteps; istep++)
    fCFM->SetParticleCutsList(istep, NULL);

  fCuts->Initialize(fCFM); 
}

//____________________________________________________________
void AliHFEtaggedTrackAnalysis::SetPID(AliHFEpid *pid){
  //
  // Set the PID and initialize the the QA manager
  //
  fPID = pid;
  fPIDqa->Initialize(fPID);
}

//____________________________________________________________
TList *AliHFEtaggedTrackAnalysis::GetPIDQA() const {
  //
  // return PID QA 
  //
  return fPIDqa->MakeList("PIDqa_taggedTracks");
}

//____________________________________________________________
TList *AliHFEtaggedTrackAnalysis::GetCutQA() const {
  //
  // return Cut QA
  //
  return fCuts->GetQAhistograms();
}