/* ************************************************************************
 * Copyright (c) 2018-2021 Advanced Micro Devices, Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 *
 * ************************************************************************ */

#ifndef ROCALUTION_HOST_MATRIX_CSR_HPP_
#define ROCALUTION_HOST_MATRIX_CSR_HPP_

#include "../base_matrix.hpp"
#include "../base_vector.hpp"
#include "../matrix_formats.hpp"

namespace rocalution
{

    template <typename ValueType>
    class HostMatrixCSR : public HostMatrix<ValueType>
    {
    public:
        HostMatrixCSR();
        explicit HostMatrixCSR(const Rocalution_Backend_Descriptor& local_backend);
        virtual ~HostMatrixCSR();

        virtual void         Info(void) const;
        virtual unsigned int GetMatFormat(void) const
        {
            return CSR;
        }

        virtual bool Check(void) const;
        virtual void AllocateCSR(int nnz, int nrow, int ncol);
        virtual void SetDataPtrCSR(
            int** row_offset, int** col, ValueType** val, int nnz, int nrow, int ncol);
        virtual void LeaveDataPtrCSR(int** row_offset, int** col, ValueType** val);

        virtual void Clear(void);
        virtual bool Zeros(void);

        virtual bool Scale(ValueType alpha);
        virtual bool ScaleDiagonal(ValueType alpha);
        virtual bool ScaleOffDiagonal(ValueType alpha);
        virtual bool AddScalar(ValueType alpha);
        virtual bool AddScalarDiagonal(ValueType alpha);
        virtual bool AddScalarOffDiagonal(ValueType alpha);

        virtual bool ExtractSubMatrix(int                    row_offset,
                                      int                    col_offset,
                                      int                    row_size,
                                      int                    col_size,
                                      BaseMatrix<ValueType>* mat) const;

        virtual bool ExtractDiagonal(BaseVector<ValueType>* vec_diag) const;
        virtual bool ExtractInverseDiagonal(BaseVector<ValueType>* vec_inv_diag) const;
        virtual bool ExtractU(BaseMatrix<ValueType>* U) const;
        virtual bool ExtractUDiagonal(BaseMatrix<ValueType>* U) const;
        virtual bool ExtractL(BaseMatrix<ValueType>* L) const;
        virtual bool ExtractLDiagonal(BaseMatrix<ValueType>* L) const;

        virtual bool
            MultiColoring(int& num_colors, int** size_colors, BaseVector<int>* permutation) const;

        virtual bool MaximalIndependentSet(int& size, BaseVector<int>* permutation) const;

        virtual bool ZeroBlockPermutation(int& size, BaseVector<int>* permutation) const;

        virtual bool SymbolicPower(int p);

        virtual bool SymbolicMatMatMult(const BaseMatrix<ValueType>& src);
        virtual bool MatMatMult(const BaseMatrix<ValueType>& A, const BaseMatrix<ValueType>& B);
        virtual bool SymbolicMatMatMult(const BaseMatrix<ValueType>& A,
                                        const BaseMatrix<ValueType>& B);
        virtual bool NumericMatMatMult(const BaseMatrix<ValueType>& A,
                                       const BaseMatrix<ValueType>& B);

        virtual bool DiagonalMatrixMultR(const BaseVector<ValueType>& diag);
        virtual bool DiagonalMatrixMultL(const BaseVector<ValueType>& diag);

        virtual bool MatrixAdd(const BaseMatrix<ValueType>& mat,
                               ValueType                    alpha,
                               ValueType                    beta,
                               bool                         structure);

        virtual bool Permute(const BaseVector<int>& permutation);

        virtual bool CMK(BaseVector<int>* permutation) const;
        virtual bool RCMK(BaseVector<int>* permutation) const;
        virtual bool ConnectivityOrder(BaseVector<int>* permutation) const;

        virtual bool ConvertFrom(const BaseMatrix<ValueType>& mat);

        virtual void CopyFrom(const BaseMatrix<ValueType>& mat);

        virtual void CopyFromCSR(const int* row_offsets, const int* col, const ValueType* val);
        virtual void CopyToCSR(int* row_offsets, int* col, ValueType* val) const;

        virtual void CopyTo(BaseMatrix<ValueType>* mat) const;

        virtual void CopyFromHostCSR(const int*       row_offset,
                                     const int*       col,
                                     const ValueType* val,
                                     int              nnz,
                                     int              nrow,
                                     int              ncol);

        virtual bool ReadFileCSR(const std::string& filename);
        virtual bool WriteFileCSR(const std::string& filename) const;

        virtual bool CreateFromMap(const BaseVector<int>& map, int n, int m);
        virtual bool
            CreateFromMap(const BaseVector<int>& map, int n, int m, BaseMatrix<ValueType>* pro);

        virtual bool ICFactorize(BaseVector<ValueType>* inv_diag);

        virtual bool ILU0Factorize(void);
        virtual bool ILUpFactorizeNumeric(int p, const BaseMatrix<ValueType>& mat);
        virtual bool ILUTFactorize(double t, int maxrow);

        virtual void LUAnalyse(void);
        virtual void LUAnalyseClear(void);
        virtual bool LUSolve(const BaseVector<ValueType>& in, BaseVector<ValueType>* out) const;

        virtual void LLAnalyse(void);
        virtual void LLAnalyseClear(void);
        virtual bool LLSolve(const BaseVector<ValueType>& in, BaseVector<ValueType>* out) const;
        virtual bool LLSolve(const BaseVector<ValueType>& in,
                             const BaseVector<ValueType>& inv_diag,
                             BaseVector<ValueType>*       out) const;

        virtual void LAnalyse(bool diag_unit = false);
        virtual void LAnalyseClear(void);
        virtual bool LSolve(const BaseVector<ValueType>& in, BaseVector<ValueType>* out) const;

        virtual void UAnalyse(bool diag_unit = false);
        virtual void UAnalyseClear(void);
        virtual bool USolve(const BaseVector<ValueType>& in, BaseVector<ValueType>* out) const;

        virtual bool Gershgorin(ValueType& lambda_min, ValueType& lambda_max) const;

        virtual void Apply(const BaseVector<ValueType>& in, BaseVector<ValueType>* out) const;
        virtual void ApplyAdd(const BaseVector<ValueType>& in,
                              ValueType                    scalar,
                              BaseVector<ValueType>*       out) const;

        virtual bool Compress(double drop_off);
        virtual bool Transpose(void);
        virtual bool Transpose(BaseMatrix<ValueType>* T) const;
        virtual bool Sort(void);
        virtual bool Key(long int& row_key, long int& col_key, long int& val_key) const;

        virtual bool ReplaceColumnVector(int idx, const BaseVector<ValueType>& vec);
        virtual bool ExtractColumnVector(int idx, BaseVector<ValueType>* vec) const;

        virtual bool ReplaceRowVector(int idx, const BaseVector<ValueType>& vec);
        virtual bool ExtractRowVector(int idx, BaseVector<ValueType>* vec) const;

        virtual bool AMGConnect(ValueType eps, BaseVector<int>* connections) const;
        virtual bool AMGAggregate(const BaseVector<int>& connections,
                                  BaseVector<int>*       aggregates) const;
        virtual bool AMGSmoothedAggregation(ValueType              relax,
                                            const BaseVector<int>& aggregates,
                                            const BaseVector<int>& connections,
                                            BaseMatrix<ValueType>* prolong,
                                            BaseMatrix<ValueType>* restrict) const;
        virtual bool AMGAggregation(const BaseVector<int>& aggregates,
                                    BaseMatrix<ValueType>* prolong,
                                    BaseMatrix<ValueType>* restrict) const;

        virtual bool RugeStueben(ValueType              eps,
                                 BaseMatrix<ValueType>* prolong,
                                 BaseMatrix<ValueType>* restrict) const;

        virtual bool FSAI(int power, const BaseMatrix<ValueType>* pattern);
        virtual bool SPAI(void);

        virtual bool InitialPairwiseAggregation(ValueType        beta,
                                                int&             nc,
                                                BaseVector<int>* G,
                                                int&             Gsize,
                                                int**            rG,
                                                int&             rGsize,
                                                int              ordering) const;
        virtual bool InitialPairwiseAggregation(const BaseMatrix<ValueType>& mat,
                                                ValueType                    beta,
                                                int&                         nc,
                                                BaseVector<int>*             G,
                                                int&                         Gsize,
                                                int**                        rG,
                                                int&                         rGsize,
                                                int                          ordering) const;
        virtual bool FurtherPairwiseAggregation(ValueType        beta,
                                                int&             nc,
                                                BaseVector<int>* G,
                                                int&             Gsize,
                                                int**            rG,
                                                int&             rGsize,
                                                int              ordering) const;
        virtual bool FurtherPairwiseAggregation(const BaseMatrix<ValueType>& mat,
                                                ValueType                    beta,
                                                int&                         nc,
                                                BaseVector<int>*             G,
                                                int&                         Gsize,
                                                int**                        rG,
                                                int&                         rGsize,
                                                int                          ordering) const;
        virtual bool CoarsenOperator(BaseMatrix<ValueType>* Ac,
                                     int                    nrow,
                                     int                    ncol,
                                     const BaseVector<int>& G,
                                     int                    Gsize,
                                     const int*             rG,
                                     int                    rGsize) const;

    private:
        MatrixCSR<ValueType, int> mat_;

        friend class BaseVector<ValueType>;
        friend class HostVector<ValueType>;
        friend class HostMatrixCOO<ValueType>;
        friend class HostMatrixDIA<ValueType>;
        friend class HostMatrixELL<ValueType>;
        friend class HostMatrixHYB<ValueType>;
        friend class HostMatrixDENSE<ValueType>;
        friend class HostMatrixMCSR<ValueType>;
        friend class HostMatrixBCSR<ValueType>;

        friend class HIPAcceleratorMatrixCSR<ValueType>;

        bool L_diag_unit_;
        bool U_diag_unit_;
    };

} // namespace rocalution

#endif // ROCALUTION_HOST_MATRIX_CSR_HPP_