// @(#)root/roostats:$Id$
// Author: Kyle Cranmer, Lorenzo Moneta, Gregory Schott, Wouter Verkerke
/*************************************************************************
 * Copyright (C) 1995-2008, Rene Brun and Fons Rademakers.               *
 * All rights reserved.                                                  *
 *                                                                       *
 * For the licensing terms see $ROOTSYS/LICENSE.                         *
 * For the list of contributors see $ROOTSYS/README/CREDITS.             *
 *************************************************************************/

/*****************************************************************************
 * Project: RooStats
 * Package: RooFit/RooStats  
 * @(#)root/roofit/roostats:$Id$
 * Authors:                     
 *   Kyle Cranmer, Lorenzo Moneta, Gregory Schott, Wouter Verkerke
 *
 *****************************************************************************/



//_________________________________________________________
//
// BEGIN_HTML
// SimpleInterval is a concrete implementation of the ConfInterval interface.  
// It implements simple 1-dimensional intervals in a range [a,b].
// In addition, you can ask it for the upper- or lower-bound.
// END_HTML
//
//

#ifndef RooStats_SimpleInterval
#include "RooStats/SimpleInterval.h"
#endif
#include "RooAbsReal.h"
#include "RooRealVar.h"
#include <string>


using namespace std;

ClassImp(RooStats::SimpleInterval) ;

using namespace RooStats;


//____________________________________________________________________
SimpleInterval::SimpleInterval(const char* name) :
   ConfInterval(name),  fLowerLimit(0), fUpperLimit(0), fConfidenceLevel(0)
{
   // Default constructor
}


//____________________________________________________________________
SimpleInterval::SimpleInterval(const SimpleInterval& other, const char* name) 
 : ConfInterval(name)
 , fParameters(other.fParameters)
 , fLowerLimit(other.fLowerLimit)
 , fUpperLimit(other.fUpperLimit)
 , fConfidenceLevel(other.fConfidenceLevel)
{
  //fParameters.add( other.fParameters );
}
  

//____________________________________________________________________
SimpleInterval& 
SimpleInterval::operator=(const SimpleInterval& other) 
{
  if (&other==this) {
    return *this ;
  } 

  ConfInterval::operator = (other);

  //fParameters      = other.fParameters;
  fParameters.removeAll();
  fParameters.add(other.fParameters);
  fLowerLimit      = other.fLowerLimit;
  fUpperLimit      = other.fUpperLimit;
  fConfidenceLevel = other.fConfidenceLevel;

  return *this ;  
}


//____________________________________________________________________
SimpleInterval::SimpleInterval(const char* name, const RooRealVar & var, Double_t lower, Double_t upper, Double_t cl) :
   ConfInterval(name), fParameters(var), fLowerLimit(lower), fUpperLimit(upper), fConfidenceLevel(cl)
{
   // Alternate constructor
}



//____________________________________________________________________
SimpleInterval::~SimpleInterval()
{
   // Destructor
}


//____________________________________________________________________
Bool_t SimpleInterval::IsInInterval(const RooArgSet &parameterPoint) const 
{  

   // Method to determine if a parameter point is in the interval
   if( !this->CheckParameters(parameterPoint) )
      return false; 

   if(parameterPoint.getSize() != 1 )
      return false;

   RooAbsReal* point = dynamic_cast<RooAbsReal*> (parameterPoint.first());
   if (point == 0)
      return false;

   if ( point->getVal() > fUpperLimit || point->getVal() < fLowerLimit)
      return false;


   return true;
}

//____________________________________________________________________
RooArgSet* SimpleInterval::GetParameters() const
{  
   // return cloned list of parameters
   return new RooArgSet(fParameters);
}

//____________________________________________________________________
Bool_t SimpleInterval::CheckParameters(const RooArgSet &parameterPoint) const
{  

   if (parameterPoint.getSize() != fParameters.getSize() ) {
      std::cout << "size is wrong, parameters don't match" << std::endl;
      return false;
   }
   if ( ! parameterPoint.equals( fParameters ) ) {
      std::cout << "size is ok, but parameters don't match" << std::endl;
      return false;
   }
   return true;
}