#pragma once

#include <petscviewer.h>

/* MANSEC = Viewer */

#if defined(PETSC_HAVE_HDF5)
  #include <hdf5.h>
  #if !defined(H5_VERSION_GE)
    /* H5_VERSION_GE was introduced in HDF5 1.8.7, we support >= 1.8.0 */
    /* So beware this will automatically 0 for HDF5 1.8.0 - 1.8.6 */
    #define H5_VERSION_GE(a, b, c) 0
  #endif

  // HDF5 1.13.0 switched from hsize_t being typedef'd to unsigned long long to being uint64_t and introduced the
  // PRIuHSIZE macro for printing. Definition of PRIuHSIZE actually precedes the change of typedef in the Git history,
  // though there was never a release with the old definitions. Nonetheless, the logic here will work any commit.
  #if !defined(PRIuHSIZE)
    #define PRIuHSIZE "llu"
  #endif

PETSC_EXTERN PetscErrorCode PetscViewerHDF5GetFileId(PetscViewer, hid_t *);

  /* On 32-bit systems HDF5 is limited by size of integer, because hsize_t is defined as size_t */
  #define PETSC_HDF5_INT_MAX (~(hsize_t)0)

  /* As per https://portal.hdfgroup.org/display/HDF5/Chunking+in+HDF5, max. chunk size is 4GB */
  #define PETSC_HDF5_MAX_CHUNKSIZE 2147483647

static inline PetscErrorCode PetscViewerHDF5PathIsRelative(const char path[], PetscBool emptyIsRelative, PetscBool *has) PeNS
{
  size_t len;

  PetscFunctionBegin;
  *has = emptyIsRelative;
  PetscCall(PetscStrlen(path, &len));
  if (len) *has = (PetscBool)(path[0] != '/');
  PetscFunctionReturn(PETSC_SUCCESS);
}

static inline PetscErrorCode PetscHDF5IntCast(PetscInt a, hsize_t *b)
{
  PetscFunctionBegin;
  PetscCheck(a >= 0, PETSC_COMM_SELF, PETSC_ERR_ARG_OUTOFRANGE, "Cannot convert negative size");
  #if defined(PETSC_USE_64BIT_INDICES) && (H5_SIZEOF_HSIZE_T == 4)
  PetscCheck(a >= PETSC_HDF5_INT_MAX, PETSC_COMM_SELF, PETSC_ERR_ARG_OUTOFRANGE, "Array too long for HDF5");
  #endif
  *b = (hsize_t)(a);
  PetscFunctionReturn(PETSC_SUCCESS);
}
PETSC_EXTERN PetscErrorCode PetscDataTypeToHDF5DataType(PetscDataType, hid_t *);
PETSC_EXTERN PetscErrorCode PetscHDF5DataTypeToPetscDataType(hid_t, PetscDataType *);

PETSC_EXTERN PetscErrorCode PetscViewerHDF5HasDataset(PetscViewer, const char[], PetscBool *);
PETSC_EXTERN PetscErrorCode PetscViewerHDF5HasObject(PetscViewer, PetscObject, PetscBool *);
PETSC_EXTERN PetscErrorCode PetscViewerHDF5ReadAttribute(PetscViewer, const char[], const char[], PetscDataType, const void *, void *);
PETSC_EXTERN PetscErrorCode PetscViewerHDF5WriteAttribute(PetscViewer, const char[], const char[], PetscDataType, const void *);
PETSC_EXTERN PetscErrorCode PetscViewerHDF5HasAttribute(PetscViewer, const char[], const char[], PetscBool *);
PETSC_EXTERN PetscErrorCode PetscViewerHDF5ReadObjectAttribute(PetscViewer, PetscObject, const char[], PetscDataType, void *, void *);
PETSC_EXTERN PetscErrorCode PetscViewerHDF5WriteObjectAttribute(PetscViewer, PetscObject, const char[], PetscDataType, const void *);
PETSC_EXTERN PetscErrorCode PetscViewerHDF5HasObjectAttribute(PetscViewer, PetscObject, const char[], PetscBool *);

PETSC_EXTERN PetscErrorCode PetscViewerHDF5Open(MPI_Comm, const char[], PetscFileMode, PetscViewer *);
PETSC_EXTERN PetscErrorCode PetscViewerHDF5PushGroup(PetscViewer, const char[]);
PETSC_EXTERN PetscErrorCode PetscViewerHDF5PopGroup(PetscViewer);
PETSC_EXTERN PetscErrorCode PetscViewerHDF5GetGroup(PetscViewer, const char[], const char *[]);
PETSC_EXTERN PetscErrorCode PetscViewerHDF5HasGroup(PetscViewer, const char[], PetscBool *);
PETSC_EXTERN PetscErrorCode PetscViewerHDF5OpenGroup(PetscViewer, const char[], hid_t *, hid_t *);
PETSC_EXTERN PetscErrorCode PetscViewerHDF5WriteGroup(PetscViewer, const char[]);

PETSC_EXTERN PetscErrorCode PetscViewerHDF5SetDefaultTimestepping(PetscViewer, PetscBool);
PETSC_EXTERN PetscErrorCode PetscViewerHDF5GetDefaultTimestepping(PetscViewer, PetscBool *);
PETSC_EXTERN PetscErrorCode PetscViewerHDF5PushTimestepping(PetscViewer);
PETSC_EXTERN PetscErrorCode PetscViewerHDF5PopTimestepping(PetscViewer);
PETSC_EXTERN PetscErrorCode PetscViewerHDF5IsTimestepping(PetscViewer, PetscBool *);
PETSC_EXTERN PetscErrorCode PetscViewerHDF5IncrementTimestep(PetscViewer);
PETSC_EXTERN PetscErrorCode PetscViewerHDF5SetTimestep(PetscViewer, PetscInt);
PETSC_EXTERN PetscErrorCode PetscViewerHDF5GetTimestep(PetscViewer, PetscInt *);

PETSC_EXTERN PetscErrorCode PetscViewerHDF5SetBaseDimension2(PetscViewer, PetscBool);
PETSC_EXTERN PetscErrorCode PetscViewerHDF5GetBaseDimension2(PetscViewer, PetscBool *);

PETSC_EXTERN PetscErrorCode PetscViewerHDF5SetSPOutput(PetscViewer, PetscBool);
PETSC_EXTERN PetscErrorCode PetscViewerHDF5GetSPOutput(PetscViewer, PetscBool *);

PETSC_EXTERN PetscErrorCode PetscViewerHDF5SetCollective(PetscViewer, PetscBool);
PETSC_EXTERN PetscErrorCode PetscViewerHDF5GetCollective(PetscViewer, PetscBool *);

PETSC_EXTERN PetscErrorCode PetscViewerHDF5SetCompress(PetscViewer, PetscBool);
PETSC_EXTERN PetscErrorCode PetscViewerHDF5GetCompress(PetscViewer, PetscBool *);
#endif /* defined(PETSC_HAVE_HDF5) */