#pragma once

#include <petscsection.h>

/* SUBMANSEC = MatGraphOperations */

/*S
  PetscPartitioner - PETSc object that manages a graph partitioner

  Level: intermediate

  Note:
  Also consider `MatPartitioning` which provides an alternative API for partitioning.

.seealso: `PetscPartitionerCreate()`, `PetscPartitionerSetType()`, `PetscPartitionerType`, `MatPartitioning`, `MatPartitioningCreate()`
S*/
typedef struct _p_PetscPartitioner *PetscPartitioner;

PETSC_EXTERN PetscClassId   PETSCPARTITIONER_CLASSID;
PETSC_EXTERN PetscErrorCode PetscPartitionerInitializePackage(void);
PETSC_EXTERN PetscErrorCode PetscPartitionerFinalizePackage(void);

/*J
  PetscPartitionerType - String with the name of a PETSc graph partitioner

  Level: beginner

.seealso: `PetscPartitionerSetType()`, `PetscPartitioner`
J*/
typedef const char *PetscPartitionerType;
#define PETSCPARTITIONERPARMETIS "parmetis"
#define PETSCPARTITIONERPTSCOTCH "ptscotch"
#define PETSCPARTITIONERCHACO    "chaco"
#define PETSCPARTITIONERSIMPLE   "simple"
#define PETSCPARTITIONERSHELL    "shell"
#define PETSCPARTITIONERGATHER   "gather"

PETSC_EXTERN PetscFunctionList PetscPartitionerList;
PETSC_EXTERN PetscErrorCode    PetscPartitionerRegister(const char[], PetscErrorCode (*)(PetscPartitioner));

PETSC_EXTERN PetscErrorCode PetscPartitionerCreate(MPI_Comm, PetscPartitioner *);
PETSC_EXTERN PetscErrorCode PetscPartitionerDestroy(PetscPartitioner *);
PETSC_EXTERN PetscErrorCode PetscPartitionerSetType(PetscPartitioner, PetscPartitionerType);
PETSC_EXTERN PetscErrorCode PetscPartitionerGetType(PetscPartitioner, PetscPartitionerType *);
PETSC_EXTERN PetscErrorCode PetscPartitionerSetUp(PetscPartitioner);
PETSC_EXTERN PetscErrorCode PetscPartitionerReset(PetscPartitioner);
PETSC_EXTERN PetscErrorCode PetscPartitionerSetFromOptions(PetscPartitioner);
PETSC_EXTERN PetscErrorCode PetscPartitionerViewFromOptions(PetscPartitioner, PetscObject, const char[]);
PETSC_EXTERN PetscErrorCode PetscPartitionerView(PetscPartitioner, PetscViewer);
PETSC_EXTERN PetscErrorCode PetscPartitionerPartition(PetscPartitioner, PetscInt, PetscInt, PetscInt[], PetscInt[], PetscSection, PetscSection, PetscSection, PetscSection, IS *);

PETSC_EXTERN PetscErrorCode PetscPartitionerShellSetPartition(PetscPartitioner, PetscInt, const PetscInt[], const PetscInt[]);
PETSC_EXTERN PetscErrorCode PetscPartitionerShellSetRandom(PetscPartitioner, PetscBool);
PETSC_EXTERN PetscErrorCode PetscPartitionerShellGetRandom(PetscPartitioner, PetscBool *);

/* We should implement MatPartitioning with PetscPartitioner */
#include <petscmat.h>
#define PETSCPARTITIONERMATPARTITIONING "matpartitioning"
PETSC_EXTERN PetscErrorCode PetscPartitionerMatPartitioningGetMatPartitioning(PetscPartitioner, MatPartitioning *);
