#ifndef __JCOMPAREHISTOGRAMS__JTESTRUNS_2D__
#define __JCOMPAREHISTOGRAMS__JTESTRUNS_2D__

#include <istream>
#include <ostream>

#include "JLang/JException.hh"

#include "JCompareHistograms/JTest_t.hh"
#include "JCompareHistograms/JTestRuns_t.hh"


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

  /**
   * Implementation of the 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 parameter slice() can have the values x, X, y or Y. The histograms are sliced along the corresponding axis, and the JRunsTest() test is applied to each slice.\n 
   * This test uses the input parameter threshold() to evaluate whether the test is passed or failed for each slice.\n 
   * The evaluation is done by comparing the threshold value with the result of the JRunsTest() test.\n 
   * The results for each slice are stored in the results buffer (see JTest_t().)
   */
  class JTestRuns_2D: 
    public JTest_t,
    public JTestRuns_t
  { 
  public:  
  
    JTestRuns_2D() :
      JTest_t("Runs_2D", "#sigma"),
      JTestRuns_t()
    {}
  
    /**
     * Read test parameters from input.
     *
     * \param  in            input stream
     * \return               input stream
     */
    std::istream& read(std::istream& in) override{

      in >> threshold >> slice;

      if (!(slice == 'x' || slice == 'X' || slice == 'y' || slice == 'Y')) {
	THROW(JLANG::JValueOutOfRange, "JTestRuns_2D::read(): Invalid slice option \'" << slice << "\'");
      }
									   
      return in;
    };
    
    /**
     * Tests the statistical compatibility of two ROOT TObjects
     * 
     * \param o1 First object
     * \param o2 Second object
     */
    void test(TObject* o1, TObject* o2) override{    

      using namespace std;
      using namespace JPP;

      if (!(slice == 'x' || slice == 'X' || slice == 'y' || slice == 'Y')) {
	THROW(JLANG::JValueOutOfRange, "JTestRuns_2D::test(): Invalid slice option \'" << slice << "\'");	
      }
    
      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 = JRunsTestSlice(h1, h2, threshold, failuresThreshold, testName, resultType, slice);

	results.push_back(r);
      
      } else if (!(dynamic_cast<TH1*>(o1) == NULL) && !(dynamic_cast<TH1*>(o2) == NULL)) {
	THROW(JLANG::JValueOutOfRange, "JTestRuns_2D::test(): For 1D histograms call JChi2_1D: " << o1->GetName() << endl);
      }
    };
  
  private:
    double threshold;                       //!< threshold value to decide if test is passed.
    double failuresThreshold;               //!< threshold value to decide if test is passed.
    char   slice;                           //!< Axis to slice. x or X for x-axis, y or Y for y-axis, n or N for None.
  };
}
  
#endif