//
// Class AliRsnCutSet
//
// This is the front-end for cut management and checking.
// It must be prepared by adding all required single cuts,
// and then with a logical expression which combines all cuts
// with the "AND", "OR" and "NOT" operators.
//

#include "AliLog.h"

#include "AliRsnExpression.h"

#include "AliRsnCutSet.h"

ClassImp(AliRsnCutSet)

//_____________________________________________________________________________
AliRsnCutSet::AliRsnCutSet(AliRsnCut::ETarget target) :
  TNamed(),
  fTarget(target),
  fCuts(0),
  fNumOfCuts(0),
  fCutScheme(""),
  fCutSchemeIndexed(""),
  fBoolValues(0),
  fIsScheme(kFALSE),
  fExpression(0)
{
//
// Constructor without name (not recommended)
//

  fBoolValues = new Bool_t[1];
  AliRsnExpression::fgCutSet = this;
}

//_____________________________________________________________________________
AliRsnCutSet::AliRsnCutSet(TString name, AliRsnCut::ETarget target) :
  TNamed(name, name),
  fTarget(target),
  fCuts(0),
  fNumOfCuts(0),
  fCutScheme(""),
  fCutSchemeIndexed(""),
  fBoolValues(0),
  fIsScheme(kFALSE),
  fExpression(0)
{
//
// Constructor with argument name (recommended)
//

  fBoolValues = new Bool_t[1];
  fExpression = 0;
  AliRsnExpression::fgCutSet = this;
}

//_____________________________________________________________________________
AliRsnCutSet::AliRsnCutSet(const AliRsnCutSet & copy) :
  TNamed((TNamed) copy),
  fTarget(copy.fTarget),
  fCuts(copy.fCuts),
  fNumOfCuts(copy.fNumOfCuts),
  fCutScheme(copy.fCutScheme),
  fCutSchemeIndexed(copy.fCutSchemeIndexed),
  fBoolValues(0),
  fIsScheme(copy.fIsScheme),
  fExpression(copy.fExpression)
{
//
// Copy constructor
//

  AliRsnExpression::fgCutSet = this;
}

//_____________________________________________________________________________
AliRsnCutSet::~AliRsnCutSet()
{
//
// Destructor
//

  delete fExpression;
  delete [] fBoolValues;
}

//_____________________________________________________________________________
void AliRsnCutSet::AddCut(AliRsnCut *cut)
{
//
// Add a new cut.
// This must be done for all components of the final expression.
// If the target of the cut does not match the target of this,
// the cut is not added.
//

  if (!cut->IsTarget(fTarget))
  {
    AliError("Cut target does not match the cut-set target. Not added.");
    return;
  }

  Int_t i;

  AliDebug(AliLog::kDebug,"<-");
  fCuts.Add(cut);
  fNumOfCuts++;

  if (fBoolValues) delete [] fBoolValues;

  fBoolValues = new Bool_t[fNumOfCuts];
  for (i = 0; i < fNumOfCuts; i++) 
  {
    fBoolValues[i] = kTRUE;
  }

  AliDebug(AliLog::kDebug,Form("%d",fCuts.GetEntriesFast()));
  AliDebug(AliLog::kDebug,"->");
}

//_____________________________________________________________________________
void AliRsnCutSet::ShowCuts() const
{
//
// Prints all cuts
//
  AliRsnCut *cut;
  
  for (Int_t i = 0; i < fCuts.GetEntriesFast() ;i++)
  {
    cut = (AliRsnCut*)fCuts.At (i);
    cut->Print();
  }
}

//_____________________________________________________________________________
Bool_t AliRsnCutSet::IsSelected(TObject *obj1, TObject *obj2)
{
//
// Checks an object according to the cut expression defined here.
//

  Int_t i;
  
  if (!fNumOfCuts) return kTRUE;

  Bool_t boolReturn = kTRUE;
  AliRsnCut *cut;
  for (i = 0; i < fNumOfCuts; i++) {
    cut = (AliRsnCut*)fCuts.At(i);
    fBoolValues[i] = cut->IsSelected(obj1, obj2);
  }

  if (fIsScheme) boolReturn = Passed();
  return boolReturn;
}

//_____________________________________________________________________________
void AliRsnCutSet::SetCutScheme(const TString & theValue)
{
//
// Define the combination of cuts with logical operators
// and using the names given to all defined cuts.
//

  AliDebug(AliLog::kDebug,"<-");
  fCutScheme = theValue;
  SetCutSchemeIndexed(theValue);
  fIsScheme = kTRUE;
  AliDebug(AliLog::kDebug,"->");
}

//_____________________________________________________________________________
void AliRsnCutSet::SetCutSchemeIndexed(TString theValue)
{
//
// Internal method which indexes all cuts to organize their combo
//

  AliDebug(AliLog::kDebug,"<-");
  theValue.Append(" ");
  // fCutSchemeIndexed = theValue;
  fCutSchemeIndexed = GetCutSchemeIndexed();
  AliDebug(AliLog::kDebug,"->");
}

//_____________________________________________________________________________
Int_t AliRsnCutSet::GetIndexByCutName(TString s)
{
//
// Retrieve the cut index from its name
//

  Int_t i;
  AliRsnCut *cut;

  for (i = 0; i < fCuts.GetEntriesFast(); i++) {
    cut = (AliRsnCut*) fCuts.At(i);
    if (!s.CompareTo(cut->GetName())) return i;
  }

  return -1;
}

//_____________________________________________________________________________
Bool_t AliRsnCutSet::Passed()
{
//
// Combines the cuts according to expression
// and gives a global response to the cut check
//

  AliRsnExpression::fgCutSet = this;
  if (!fExpression) {
    fExpression = new AliRsnExpression(fCutSchemeIndexed);
    AliDebug(AliLog::kDebug,"fExpression was created.");
  }

  return fExpression->Value(*GetCuts());
}

//_____________________________________________________________________________
Bool_t AliRsnCutSet::IsValidScheme()
{
//
// Validity check on cut expression specified by user
//

  return (!(ShowCutScheme().Contains("Error")));
}

//_____________________________________________________________________________
TString AliRsnCutSet::ShowCutScheme()
{
//
// Utility method to check validity of expression
//
  return fExpression->Unparse();
}

//_____________________________________________________________________________
Int_t AliRsnCutSet::TestExpression(TString opt)
{

//   AliRsnCut *cut1 = new AliRsnCut ("aaa","aaa");
//   cut1->SetCutValues (AliRsnCut::kEsdPt,0.0,1.0);
//   AliRsnCut *cut2 = new AliRsnCut ("bbb","bbb");
//   cut2->SetCutValues (AliRsnCut::kEsdPt,1.,2.0);
//   AliRsnCut *cut3 = new AliRsnCut ("ccc","ccc");
//   cut3->SetCutValues (AliRsnCut::kEsdPt,2.0,3.0);
//
//   AliRsnCutSet* set  = new AliRsnCutSet ("setOne");
//   set->AddCut (cut1);
//   set->AddCut (cut2);
//   set->AddCut (cut3);
//
//   set->SetCutScheme ("(aaa&!(ccc))&(bbb&!(ccc))");
//
//   set->ShowCuts ();

  AliDebug(1, opt.Data());
  return 0;
}

//_____________________________________________________________________________
void AliRsnCutSet::PrintSetInfo()
{
//
// Show data about the cut set
//

  Int_t i;

  AliInfo("========== Rsn Cut Set info ==============");
  AliInfo(Form("Scheme : %s",fCutScheme.Data()));
  AliInfo(Form("Scheme : %s",fCutSchemeIndexed.Data()));
  AliInfo(Form("Num of Cuts: %d", fCuts.GetEntriesFast()));
  AliInfo("====== Cuts ======");
  AliRsnCut *cut;
  for (i = 0; i < fCuts.GetEntriesFast(); i++) {
    cut = (AliRsnCut*) fCuts.At(i);
    if (cut) AliInfo(Form("%d %d",i,fBoolValues[i]));
  }
  AliInfo("========== END Rsn Cut Mgr info ==============");
}

//_____________________________________________________________________________
TString AliRsnCutSet::GetCutSchemeIndexed()
{
//
// Internal method to retrieve the list of cuts with their indexes
// for evaluation of cut expression
//

  AliDebug(AliLog::kDebug,"<-");
  Int_t i;
  TString str(fCutScheme);
  AliDebug(AliLog::kDebug,Form("Num of cuts %d",fCuts.GetEntriesFast()));
  AliRsnCut *cut;
  for (i = 0; i < fCuts.GetEntriesFast(); i++) {
    cut = (AliRsnCut*) fCuts.At(i);
    str.ReplaceAll(cut->GetName(),Form("%d",i));
  }
  AliDebug(AliLog::kDebug,"->");
  return str;
}

//_____________________________________________________________________________
void AliRsnCutSet::SetEvent(AliRsnEvent *event)
{
//
// Set the reference event to all contained cuts
//

  Int_t i;
  AliRsnCut *cut;
  for (i = 0; i < fCuts.GetEntriesFast(); i++) {
    cut = (AliRsnCut*) fCuts.At(i);
    if (cut) cut->SetEvent(event);
  }
}