module;
#include <mfem.hpp>
export module mean_field:integrators.advection;
import :mapping.domain_mapper;

export namespace mean_field::integrators {
    class AdvectionIntegrator : public mfem::BlockNonlinearFormIntegrator {
    public:
        AdvectionIntegrator(
            const mapping::DomainMapper &mapper,
            const mfem::GridFunction &displacement,
            const mfem::GridFunction &compactification_coordinate
        );

        void AssembleElementVector(
            const mfem::Array<const mfem::FiniteElement *> &el,
            mfem::ElementTransformation &Tr,
            const mfem::Array<const mfem::Vector *> &elfun,
            const mfem::Array<mfem::Vector *> &elvec
        ) override;

        void AssembleElementGrad(
            const mfem::Array<const mfem::FiniteElement *> &el,
            mfem::ElementTransformation &Tr,
            const mfem::Array<const mfem::Vector *> &elfun,
            const mfem::Array2D<mfem::DenseMatrix *> &elmats
        ) override;

    private:
        mapping::GridFunctionMappingEvaluator m_mapping;
    };
} // namespace mean_field::integrators