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#ifndef WARPX_PSATD_ALGORITHM_H_
#define WARPX_PSATD_ALGORITHM_H_

#include <SpectralBaseAlgorithm.H>

/**
 * \brief Class that updates the field in spectral space
 * and stores the coefficients of the corresponding update equation.
 */
class PsatdAlgorithm : public SpectralBaseAlgorithm
{

    public:
        PsatdAlgorithm(const SpectralKSpace& spectral_kspace,
                         const amrex::DistributionMapping& dm,
                         const int norder_x, const int norder_y,
                         const int norder_z, const bool nodal,
                         const amrex::Real dt);
        // Redefine functions from base class
        virtual void pushSpectralFields(SpectralFieldData& f) const override final;
        virtual int getRequiredNumberOfFields() const override final {
            return SpectralFieldIndex::n_fields;
        }

        void InitializeSpectralCoefficients(const SpectralKSpace& spectral_kspace,
                                    const amrex::DistributionMapping& dm,
                                    const amrex::Real dt);

    private:
        SpectralCoefficients C_coef, S_ck_coef, X1_coef, X2_coef, X3_coef;
};

#endif // WARPX_PSATD_ALGORITHM_H_