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#ifndef __INTERPOLATING_FUNCTION_ALGLIB_H
#define __INTERPOLATING_FUNCTION_ALGLIB_H

#include "../Core/SharedLibraryExportMacros.h"
#include "Functions.h"
#include "SerializableSpline1dInterpolant.h"
#include "InterpSolutionIterator.h"

namespace Core {

    class LIB_LOCAL InterpolatingFunctionALGLIB :
        public OneArgumentDiffFunction {
    private:
#ifndef NO_SERIALIZE
        friend class boost::serialization::access;

        //The second parameter should eventually be version
        template<class Archive>
            void serialize(Archive & ar, const unsigned int) {
                ar & boost::serialization::base_object<OneArgumentDiffFunction>(
                    *this
                );
                ar & __spline;
                ar & __min_x & __max_x;
            }
#endif

        SerializableSpline1dInterpolant __spline;

        double __min_x,

               __max_x;
    public:
        InterpolatingFunctionALGLIB() {};

        InterpolatingFunctionALGLIB(
            const std::valarray<double> &x,

            const std::valarray<double> &y,

            const std::valarray<double> &yprime=
            std::valarray<double>(),

            double smoothing=NaN,

            int degrees_of_freedom=-1
        )
        : InterpolatingFunctionALGLIB(
            &(x[0]),
            &(y[0]),
            x.size(),
            (yprime.size() ? &(yprime[0]) : NULL),
            smoothing,
            degrees_of_freedom
        )
        {
            assert(x.size() == y.size());
            assert(yprime.size() == 0 || yprime.size() == x.size());
        }

        InterpolatingFunctionALGLIB(
            const double *x,

            const double *y,

            size_t num_points,

            const double *yprime = NULL,

            double smoothing=NaN,

            int degrees_of_freedom=-1);

        inline double operator()(double x) const
        {return alglib::spline1dcalc(__spline, x);}

        inline const CubicSplineDerivatives *deriv(double x) const
        {
            double v, dv, d2v;
            alglib::spline1ddiff(__spline, x, v, dv, d2v);
            return new CubicSplineDerivatives(v, dv, d2v);
        }

        inline double range_high() const {return __max_x;}

        inline double range_low() const {return __min_x;}

        InterpSolutionIterator crossings(double y=0) const;
    }; //End InterpolatingFunctionALGLIB class
    //BOOST_CLASS_EXPORT_GUID(OneArgumentDiffFunction,
    //                        "OneArgumentDiffFunction")

} //End Core namespace

#ifndef NO_SERIALIZE
    BOOST_CLASS_EXPORT_KEY(Core::InterpolatingFunctionALGLIB)
    BOOST_CLASS_EXPORT_KEY(Core::ZeroFunction)
#endif

        //BOOST_CLASS_EXPORT_GUID(Core::InterpolatingFunctionALGLIB,
        //  "InterpolatingFunctionALGLIB")

#endif