/*
 * ----------------------------------------------------------------------------
 * Programmer(s): Cody J. Balos @ LLNL
 * ----------------------------------------------------------------------------
 * SUNDIALS Copyright Start
 * Copyright (c) 2002-2024, Lawrence Livermore National Security
 * and Southern Methodist University.
 * All rights reserved.
 *
 * See the top-level LICENSE and NOTICE files for details.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 * SUNDIALS Copyright End
 * ----------------------------------------------------------------------------
 * This is the header file for the SuperLU-DIST implementation of the SUNLINSOL
 * module.
 *
 * Part I contains declarations specific to the SuperLU-Dist implementation of
 * the supplied SUNLINSOL module.
 *
 * Part II contains the prototype for the constructor SUNSuperLUDIST as well as
 * implementation-specific prototypes for various useful solver operations.
 *
 * Notes:
 *
 *   - The definition of the generic SUNLinearSolver structure can be found in
 *   the header file sundials_linearsolver.h.
 * ----------------------------------------------------------------------------
 */

#ifndef _SUNLINSOL_SLUDIST_H
#define _SUNLINSOL_SLUDIST_H

#include <mpi.h>
#include <sundials/sundials_linearsolver.h>
#include <sundials/sundials_matrix.h>
#include <sundials/sundials_nvector.h>
#include <sunmatrix/sunmatrix_slunrloc.h>
#include <superlu_ddefs.h>

#define xLUstructInit        dLUstructInit
#define xScalePermstructInit dScalePermstructInit
#define xScalePermstructFree dScalePermstructFree
#define xLUstructFree        dLUstructFree
#define xDestroy_LU          dDestroy_LU
#define xScalePermstruct_t   dScalePermstruct_t
#define xLUstruct_t          dLUstruct_t
#define xSOLVEstruct_t       dSOLVEstruct_t

#ifdef __cplusplus
extern "C" {
#endif

/*
 * ----------------------------------------------------------------------------
 * PART I: SuperLU-DIST implementation of SUNLinearSolver
 * ----------------------------------------------------------------------------
 */

struct _SUNLinearSolverContent_SuperLUDIST
{
  sunbooleantype first_factorize;
  int last_flag;
  sunrealtype berr;
  gridinfo_t* grid;
  xLUstruct_t* lu;
  superlu_dist_options_t* options;
  xScalePermstruct_t* scaleperm;
  xSOLVEstruct_t* solve;
  SuperLUStat_t* stat;
  sunindextype N;
};

typedef struct _SUNLinearSolverContent_SuperLUDIST* SUNLinearSolverContent_SuperLUDIST;

/*
 * ----------------------------------------------------------------------------
 * PART II: Functions exported by sunlinsol_sludist
 * ----------------------------------------------------------------------------
 */

SUNDIALS_EXPORT SUNLinearSolver SUNLinSol_SuperLUDIST(
  N_Vector y, SUNMatrix A, gridinfo_t* grid, xLUstruct_t* lu,
  xScalePermstruct_t* scaleperm, xSOLVEstruct_t* solve, SuperLUStat_t* stat,
  superlu_dist_options_t* options, SUNContext sunctx);

/*
 * ----------------------------------------------------------------------------
 *  Accessor functions.
 * ----------------------------------------------------------------------------
 */

SUNDIALS_EXPORT sunrealtype SUNLinSol_SuperLUDIST_GetBerr(SUNLinearSolver LS);
SUNDIALS_EXPORT gridinfo_t* SUNLinSol_SuperLUDIST_GetGridinfo(SUNLinearSolver LS);
SUNDIALS_EXPORT xLUstruct_t* SUNLinSol_SuperLUDIST_GetLUstruct(SUNLinearSolver LS);
SUNDIALS_EXPORT superlu_dist_options_t* SUNLinSol_SuperLUDIST_GetSuperLUOptions(
  SUNLinearSolver LS);
SUNDIALS_EXPORT xScalePermstruct_t* SUNLinSol_SuperLUDIST_GetScalePermstruct(
  SUNLinearSolver LS);
SUNDIALS_EXPORT xSOLVEstruct_t* SUNLinSol_SuperLUDIST_GetSOLVEstruct(
  SUNLinearSolver LS);
SUNDIALS_EXPORT SuperLUStat_t* SUNLinSol_SuperLUDIST_GetSuperLUStat(
  SUNLinearSolver LS);

/*
 * ----------------------------------------------------------------------------
 *  SuperLU-DIST implementations of SUNLinearSolver operations
 * ----------------------------------------------------------------------------
 */

SUNDIALS_EXPORT SUNLinearSolver_Type SUNLinSolGetType_SuperLUDIST(SUNLinearSolver S);
SUNDIALS_EXPORT SUNLinearSolver_ID SUNLinSolGetID_SuperLUDIST(SUNLinearSolver S);
SUNDIALS_EXPORT SUNErrCode SUNLinSolInitialize_SuperLUDIST(SUNLinearSolver S);
SUNDIALS_EXPORT int SUNLinSolSetup_SuperLUDIST(SUNLinearSolver S, SUNMatrix A);
SUNDIALS_EXPORT int SUNLinSolSolve_SuperLUDIST(SUNLinearSolver S, SUNMatrix A,
                                               N_Vector x, N_Vector b,
                                               sunrealtype tol);
SUNDIALS_EXPORT sunindextype SUNLinSolLastFlag_SuperLUDIST(SUNLinearSolver S);
SUNDIALS_EXPORT SUNErrCode SUNLinSolSpace_SuperLUDIST(SUNLinearSolver S,
                                                      long int* lenrwLS,
                                                      long int* leniwLS);
SUNDIALS_EXPORT SUNErrCode SUNLinSolFree_SuperLUDIST(SUNLinearSolver S);

#ifdef __cplusplus
}
#endif

#endif