#ifndef PETSC_DMSTAG_H
#define PETSC_DMSTAG_H

#include <petscdm.h>
#include <petscdmproduct.h>

/* SUBMANSEC = DMStag */

/*E
  DMStagStencilLocation - enumerated type denoting a location relative to an element in a `DMSTAG` grid

  The interpretation of these values is dimension-dependent.

  Level: beginner

  Developer Note:
   The order of the enum entries is significant, as it corresponds to the canonical numbering
   of DOFs, and the fact that the numbering starts at 0 may also be used by the implementation.

.seealso: [](ch_stag), `DMSTAG`, `DMStagStencil`, `DMStagGetLocationSlot()`, `DMStagStencilType`
E*/
typedef enum {
  DMSTAG_NULL_LOCATION = 0,
  DMSTAG_BACK_DOWN_LEFT,
  DMSTAG_BACK_DOWN,
  DMSTAG_BACK_DOWN_RIGHT,
  DMSTAG_BACK_LEFT,
  DMSTAG_BACK,
  DMSTAG_BACK_RIGHT,
  DMSTAG_BACK_UP_LEFT,
  DMSTAG_BACK_UP,
  DMSTAG_BACK_UP_RIGHT,
  DMSTAG_DOWN_LEFT,
  DMSTAG_DOWN,
  DMSTAG_DOWN_RIGHT,
  DMSTAG_LEFT,
  DMSTAG_ELEMENT,
  DMSTAG_RIGHT,
  DMSTAG_UP_LEFT,
  DMSTAG_UP,
  DMSTAG_UP_RIGHT,
  DMSTAG_FRONT_DOWN_LEFT,
  DMSTAG_FRONT_DOWN,
  DMSTAG_FRONT_DOWN_RIGHT,
  DMSTAG_FRONT_LEFT,
  DMSTAG_FRONT,
  DMSTAG_FRONT_RIGHT,
  DMSTAG_FRONT_UP_LEFT,
  DMSTAG_FRONT_UP,
  DMSTAG_FRONT_UP_RIGHT
} DMStagStencilLocation;
PETSC_EXTERN const char *const DMStagStencilLocations[]; /* Corresponding strings (see stagstencil.c) */

/*S
  DMStagStencil - data structure representing a degree of freedom on a `DMSTAG` grid

  Data structure (C struct), analogous to describing a degree of freedom associated with a `DMSTAG` object,
  in terms of a global element index in each of up to three directions, a "location" as defined by `DMStagStencilLocation`,
  and a component number. Primarily for use with `DMStagMatSetValuesStencil()` (compare with use of `MatStencil` with `MatSetValuesStencil()`).

  Level: beginner

  Note:
  The component (c) field must always be set, even if there is a single component at a given location (in which case c should be set to 0).

.seealso: [](ch_stag), `DMSTAG`, `DMStagMatSetValuesStencil()`, `DMStagVecSetValuesStencil()`, `DMStagStencilLocation`, `DMStagSetStencilWidth()`,
          `DMStagSetStencilType()`, `DMStagVecGetValuesStencil()`, `DMStagStencilLocation`
S*/
typedef struct {
  DMStagStencilLocation loc;
  PetscInt              i, j, k, c;
} DMStagStencil;

/*E
  DMStagStencilType - Elementwise stencil type, determining which neighbors participate in communication

  Level: beginner

.seealso: [](ch_stag), `DMSTAG`, `DMStagCreate1d()`, `DMStagCreate2d()`, `DMStagCreate3d()`, `DMStagStencil`, `DMDAStencilType`, `DMStagStencilLocation`
E*/

typedef enum {
  DMSTAG_STENCIL_NONE = 0,
  DMSTAG_STENCIL_STAR,
  DMSTAG_STENCIL_BOX
} DMStagStencilType;
PETSC_EXTERN const char *const DMStagStencilTypes[]; /* Corresponding strings (see stagstencil.c) */

PETSC_EXTERN PetscErrorCode DMCreate_Stag(DM);
PETSC_EXTERN PetscErrorCode DMStagCreate1d(MPI_Comm, DMBoundaryType, PetscInt, PetscInt, PetscInt, DMStagStencilType, PetscInt, const PetscInt[], DM *);
PETSC_EXTERN PetscErrorCode DMStagCreate2d(MPI_Comm, DMBoundaryType, DMBoundaryType, PetscInt, PetscInt, PetscInt, PetscInt, PetscInt, PetscInt, PetscInt, DMStagStencilType, PetscInt, const PetscInt[], const PetscInt[], DM *);
PETSC_EXTERN PetscErrorCode DMStagCreate3d(MPI_Comm, DMBoundaryType, DMBoundaryType, DMBoundaryType, PetscInt, PetscInt, PetscInt, PetscInt, PetscInt, PetscInt, PetscInt, PetscInt, PetscInt, PetscInt, DMStagStencilType, PetscInt, const PetscInt[], const PetscInt[], const PetscInt[], DM *);
PETSC_EXTERN PetscErrorCode DMStagCreateCompatibleDMStag(DM, PetscInt, PetscInt, PetscInt, PetscInt, DM *);
PETSC_EXTERN PetscErrorCode DMStagCreateISFromStencils(DM, PetscInt, DMStagStencil *, IS *);
PETSC_EXTERN PetscErrorCode DMStagGetBoundaryTypes(DM, DMBoundaryType *, DMBoundaryType *, DMBoundaryType *);
PETSC_EXTERN PetscErrorCode DMStagGetCorners(DM, PetscInt *, PetscInt *, PetscInt *, PetscInt *, PetscInt *, PetscInt *, PetscInt *, PetscInt *, PetscInt *);
PETSC_EXTERN PetscErrorCode DMStagGetDOF(DM, PetscInt *, PetscInt *, PetscInt *, PetscInt *);
PETSC_EXTERN PetscErrorCode DMStagGetEntries(DM, PetscInt *);
PETSC_EXTERN PetscErrorCode DMStagGetEntriesLocal(DM, PetscInt *);
PETSC_EXTERN PetscErrorCode DMStagGetEntriesPerElement(DM, PetscInt *);
PETSC_EXTERN PetscErrorCode DMStagGetGhostCorners(DM, PetscInt *, PetscInt *, PetscInt *, PetscInt *, PetscInt *, PetscInt *);
PETSC_EXTERN PetscErrorCode DMStagGetGlobalSizes(DM, PetscInt *, PetscInt *, PetscInt *);
PETSC_EXTERN PetscErrorCode DMStagGetIsFirstRank(DM, PetscBool *, PetscBool *, PetscBool *);
PETSC_EXTERN PetscErrorCode DMStagGetIsLastRank(DM, PetscBool *, PetscBool *, PetscBool *);
PETSC_EXTERN PetscErrorCode DMStagGetLocalSizes(DM, PetscInt *, PetscInt *, PetscInt *);
PETSC_EXTERN PetscErrorCode DMStagGetLocationDOF(DM, DMStagStencilLocation, PetscInt *);
PETSC_EXTERN PetscErrorCode DMStagGetLocationSlot(DM, DMStagStencilLocation, PetscInt, PetscInt *);
PETSC_EXTERN PetscErrorCode DMStagGetNumRanks(DM, PetscInt *, PetscInt *, PetscInt *);
PETSC_EXTERN PetscErrorCode DMStagGetOwnershipRanges(DM, const PetscInt **, const PetscInt **, const PetscInt **);
PETSC_EXTERN PetscErrorCode DMStagGetProductCoordinateArrays(DM, void *, void *, void *);
PETSC_EXTERN PetscErrorCode DMStagGetProductCoordinateArraysRead(DM, void *, void *, void *);
PETSC_EXTERN PetscErrorCode DMStagGetProductCoordinateLocationSlot(DM, DMStagStencilLocation, PetscInt *);
PETSC_EXTERN PetscErrorCode DMStagGetStencilType(DM, DMStagStencilType *);
PETSC_EXTERN PetscErrorCode DMStagGetStencilWidth(DM, PetscInt *);
PETSC_EXTERN PetscErrorCode DMStagMatGetValuesStencil(DM, Mat, PetscInt, const DMStagStencil *, PetscInt, const DMStagStencil *, PetscScalar *);
PETSC_EXTERN PetscErrorCode DMStagMatSetValuesStencil(DM, Mat, PetscInt, const DMStagStencil *, PetscInt, const DMStagStencil *, const PetscScalar *, InsertMode);
PETSC_EXTERN PetscErrorCode DMStagMigrateVec(DM, Vec, DM, Vec);
PETSC_EXTERN PetscErrorCode DMStagPopulateLocalToGlobalInjective(DM);
PETSC_EXTERN PetscErrorCode DMStagRestoreProductCoordinateArrays(DM, void *, void *, void *);
PETSC_EXTERN PetscErrorCode DMStagRestoreProductCoordinateArraysRead(DM, void *, void *, void *);
PETSC_EXTERN PetscErrorCode DMStagRestrictSimple(DM, Vec, DM, Vec);
PETSC_EXTERN PetscErrorCode DMStagSetBoundaryTypes(DM, DMBoundaryType, DMBoundaryType, DMBoundaryType);
PETSC_EXTERN PetscErrorCode DMStagSetCoordinateDMType(DM, DMType);
PETSC_EXTERN PetscErrorCode DMStagSetDOF(DM, PetscInt, PetscInt, PetscInt, PetscInt);
PETSC_EXTERN PetscErrorCode DMStagSetGlobalSizes(DM, PetscInt, PetscInt, PetscInt);
PETSC_EXTERN PetscErrorCode DMStagSetNumRanks(DM, PetscInt, PetscInt, PetscInt);
PETSC_EXTERN PetscErrorCode DMStagSetOwnershipRanges(DM, PetscInt const *, PetscInt const *, PetscInt const *);
PETSC_EXTERN PetscErrorCode DMStagSetStencilType(DM, DMStagStencilType);
PETSC_EXTERN PetscErrorCode DMStagSetStencilWidth(DM, PetscInt);
PETSC_EXTERN PetscErrorCode DMStagSetUniformCoordinates(DM, PetscReal, PetscReal, PetscReal, PetscReal, PetscReal, PetscReal);
PETSC_EXTERN PetscErrorCode DMStagSetUniformCoordinatesExplicit(DM, PetscReal, PetscReal, PetscReal, PetscReal, PetscReal, PetscReal);
PETSC_EXTERN PetscErrorCode DMStagSetUniformCoordinatesProduct(DM, PetscReal, PetscReal, PetscReal, PetscReal, PetscReal, PetscReal);
PETSC_EXTERN PetscErrorCode DMStagStencilToIndexLocal(DM, PetscInt, PetscInt, const DMStagStencil *, PetscInt *);
PETSC_EXTERN PetscErrorCode DMStagVecGetArray(DM, Vec, void *);
PETSC_EXTERN PetscErrorCode DMStagVecGetArrayRead(DM, Vec, void *);
PETSC_EXTERN PetscErrorCode DMStagVecGetValuesStencil(DM, Vec, PetscInt, const DMStagStencil *, PetscScalar *);
PETSC_EXTERN PetscErrorCode DMStagVecRestoreArray(DM, Vec, void *);
PETSC_EXTERN PetscErrorCode DMStagVecRestoreArrayRead(DM, Vec, void *);
PETSC_EXTERN PetscErrorCode DMStagVecSetValuesStencil(DM, Vec, PetscInt, const DMStagStencil *, const PetscScalar *, InsertMode);
PETSC_EXTERN PetscErrorCode DMStagVecSplitToDMDA(DM, Vec, DMStagStencilLocation, PetscInt, DM *, Vec *);

PETSC_DEPRECATED_FUNCTION("Use DMStagGetProductCoordinateArraysRead() (since version 3.13") static inline PetscErrorCode DMStagGet1dCoordinateArraysDOFRead(DM dm, void *ax, void *ay, void *az)
{
  return DMStagGetProductCoordinateArraysRead(dm, ax, ay, az);
}
PETSC_DEPRECATED_FUNCTION("Use DMStagGetProductCoordinateLocationSlot() (since version 3.13") static inline PetscErrorCode DMStagGet1dCoordinateLocationSlot(DM dm, DMStagStencilLocation loc, PetscInt *s)
{
  return DMStagGetProductCoordinateLocationSlot(dm, loc, s);
}
PETSC_DEPRECATED_FUNCTION("Use DMStagGetStencilType() (since version 3.11)") static inline PetscErrorCode DMStagGetGhostType(DM dm, DMStagStencilType *s)
{
  return DMStagGetStencilType(dm, s);
}
PETSC_DEPRECATED_FUNCTION("Use DMStagRestoreProductCoordinateArraysRead() (since version 3.13") static inline PetscErrorCode DMStagRestore1dCoordinateArraysDOFRead(DM dm, void *ax, void *ay, void *az)
{
  return DMStagRestoreProductCoordinateArraysRead(dm, ax, ay, az);
}
PETSC_DEPRECATED_FUNCTION("Use DMStagSetStencilType() (since version 3.11)") static inline PetscErrorCode DMStagSetGhostType(DM dm, DMStagStencilType *s)
{
  return DMStagGetStencilType(dm, s);
}
PETSC_DEPRECATED_FUNCTION("Use DMStagVecGetArray() (since version 3.13") static inline PetscErrorCode DMStagVecGetArrayDOF(DM dm, Vec v, void *a)
{
  return DMStagVecGetArray(dm, v, a);
}
PETSC_DEPRECATED_FUNCTION("Use DMStagVecGetArrayRead() (since version 3.13") static inline PetscErrorCode DMStagVecGetArrayDOFRead(DM dm, Vec v, void *a)
{
  return DMStagVecGetArrayRead(dm, v, a);
}
PETSC_DEPRECATED_FUNCTION("Use DMStagVecRestoreArray() (since version 3.13") static inline PetscErrorCode DMStagVecRestoreArrayDOF(DM dm, Vec v, void *a)
{
  return DMStagVecRestoreArray(dm, v, a);
}
PETSC_DEPRECATED_FUNCTION("Use DMStagVecRestoreArrayRead() (since version 3.13") static inline PetscErrorCode DMStagVecRestoreArrayDOFRead(DM dm, Vec v, void *a)
{
  return DMStagVecRestoreArrayRead(dm, v, a);
}

#endif // PETSC_DMSTAG_H