#ifndef __JCOMPAREHISTOGRAMS__JTESTCHI2_BIN__
#define __JCOMPAREHISTOGRAMS__JTESTCHI2_BIN__

#include <istream>
#include <ostream>
#include "JCompareHistograms/JTest_t.hh"
#include "JCompareHistograms/JTestChi2_t.hh"


/**
 * \author rgruiz
 */
namespace JCOMPAREHISTOGRAMS {

  /**
   * Implementation of a bin-by-bin Chi2 test for 2D histograms.\n
   * This class is derived from the abstract class JTest_t(). For a general description of the implementation of this and other tests derived from JTest_t(), see its documentation.\n
   * The test is run by the method JChi2TestBin_2D(). 
   */
  class JTestChi2_Bin: 
    public JTest_t,
    public JTestChi2_t
  { 
  public:  
    /**
     * Default constructor.
     */
    JTestChi2_Bin() :
      JTest_t("Chi2_Bin", "Outliers[%]"),
      JTestChi2_t()
    {}
  
    /**
     * Read test parameters from input.
     *
     * \param  in            input stream
     * \return               input stream
     */
    std::istream& read(std::istream& in) override{ 
      return in >> outliersThreshold >> chi2Threshold;
    };
    
    /**
     * Tests the statistical compatibility of two ROOT 2D histograms
     * 
     * \param o1 First histogram
     * \param o2 Second histogram
     *
     * \return Test result
     */
    void test(TObject* o1, TObject* o2) override{    

      using namespace std;
    
      if (!(dynamic_cast<TH2*>(o1) == NULL) && !(dynamic_cast<TH2*>(o2) == NULL)) {
	 	  
	TH2D* h1 = dynamic_cast<TH2D*>(o1);
	TH2D* h2 = dynamic_cast<TH2D*>(o2);
      
	JTestResult r = JChi2TestBin_2D(h1, h2, outliersThreshold, chi2Threshold, testName, resultType);
	results.push_back(r);
      }
    };
    
  private:
    double chi2Threshold;                        //!< threshold p-value to decide if test is passed for a bin.
    double outliersThreshold;                    //!< fraction of bins allowed to fail the test.
  };
}
  
#endif