#include <petsc/private/f90impl.h>
#include <petsc/private/sfimpl.h>

#if defined(PETSC_HAVE_FORTRAN_CAPS)
  #define petscsfview_            PETSCSFVIEW
  #define petscsfgetgraph_        PETSCSFGETGRAPH
  #define petscsfbcastbegin_      PETSCSFBCASTBEGIN
  #define petscsfbcastend_        PETSCSFBCASTEND
  #define petscsfreducebegin_     PETSCSFREDUCEBEGIN
  #define petscsfreduceend_       PETSCSFREDUCEEND
  #define f90arraysfnodecreate_   F90ARRAYSFNODECREATE
  #define petscsfviewfromoptions_ PETSCSFVIEWFROMOPTIONS
  #define petscsfdestroy_         PETSCSFDESTROY
  #define petscsfsetgraph_        PETSCSFSETGRAPH
  #define petscsfgetleafranks_    PETSCSFGETLEAFRANKS
  #define petscsfgetrootranks_    PETSCSFGETROOTRANKS
#elif !defined(PETSC_HAVE_FORTRAN_UNDERSCORE)
  #define petscsfgetgraph_        petscsfgetgraph
  #define petscsfview_            petscsfview
  #define petscsfbcastbegin_      petscsfbcastbegin
  #define petscsfbcastend_        petscsfbcastend
  #define petscsfreducebegin_     petscsfreducebegin
  #define petscsfreduceend_       petscsfreduceend
  #define f90arraysfnodecreate_   f90arraysfnodecreate
  #define petscsfviewfromoptions_ petscsfviewfromoptions
  #define petscsfdestroy_         petscsfdestroy
  #define petscsfsetgraph_        petscsfsetgraph
  #define petscsfgetleafranks_    petscsfgetleafranks
  #define petscsfgetrootranks_    petscsfgetrootranks
#endif

PETSC_EXTERN void f90arraysfnodecreate_(const PetscInt *, PetscInt *, void *PETSC_F90_2PTR_PROTO_NOVAR);

PETSC_EXTERN void petscsfsetgraph_(PetscSF *sf, PetscInt *nroots, PetscInt *nleaves, PetscInt *ilocal, PetscCopyMode *localmode, PetscSFNode *iremote, PetscCopyMode *remotemode, int *ierr)
{
  if (ilocal == PETSC_NULL_INTEGER_Fortran) ilocal = NULL;
  *ierr = PetscSFSetGraph(*sf, *nroots, *nleaves, ilocal, *localmode, iremote, *remotemode);
}

PETSC_EXTERN void petscsfview_(PetscSF *sf, PetscViewer *vin, PetscErrorCode *ierr)
{
  PetscViewer v;

  PetscPatchDefaultViewers_Fortran(vin, v);
  *ierr = PetscSFView(*sf, v);
}

PETSC_EXTERN void petscsfgetgraph_(PetscSF *sf, PetscInt *nroots, PetscInt *nleaves, F90Array1d *ailocal, F90Array1d *airemote, PetscErrorCode *ierr PETSC_F90_2PTR_PROTO(pilocal) PETSC_F90_2PTR_PROTO(piremote))
{
  const PetscInt    *ilocal;
  const PetscSFNode *iremote;
  PetscInt           nl;

  *ierr = PetscSFGetGraph(*sf, nroots, nleaves, &ilocal, &iremote);
  if (*ierr) return;
  nl = *nleaves;
  if (!ilocal) nl = 0;
  *ierr = F90Array1dCreate((void *)ilocal, MPIU_INT, 1, nl, ailocal PETSC_F90_2PTR_PARAM(pilocal));
  /* this creates a memory leak */
  f90arraysfnodecreate_((PetscInt *)iremote, nleaves, airemote PETSC_F90_2PTR_PARAM(piremote));
}

PETSC_EXTERN void petscsfgetleafranks_(PetscSF *sf, PetscInt *niranks, F90Array1d *airanks, F90Array1d *aioffset, F90Array1d *airootloc, PetscErrorCode *ierr PETSC_F90_2PTR_PROTO(piranks) PETSC_F90_2PTR_PROTO(pioffset) PETSC_F90_2PTR_PROTO(pirootloc))
{
  const PetscMPIInt *iranks   = NULL;
  const PetscInt    *ioffset  = NULL;
  const PetscInt    *irootloc = NULL;

  *ierr = PetscSFGetLeafRanks(*sf, niranks, &iranks, &ioffset, &irootloc);
  if (*ierr) return;
  *ierr = F90Array1dCreate((void *)irootloc, MPIU_INT, 1, ioffset[*niranks], airootloc PETSC_F90_2PTR_PARAM(pirootloc));
  if (*ierr) return;
  *ierr = F90Array1dCreate((void *)iranks, MPI_INT, 1, *niranks, airanks PETSC_F90_2PTR_PARAM(piranks));
  if (*ierr) return;
  *ierr = F90Array1dCreate((void *)ioffset, MPIU_INT, 1, *niranks + 1, aioffset PETSC_F90_2PTR_PARAM(pioffset));
  if (*ierr) return;
}

PETSC_EXTERN void petscsfgetrootranks_(PetscSF *sf, PetscInt *nranks, F90Array1d *aranks, F90Array1d *aroffset, F90Array1d *armine, F90Array1d *arremote, PetscErrorCode *ierr PETSC_F90_2PTR_PROTO(pranks) PETSC_F90_2PTR_PROTO(proffset) PETSC_F90_2PTR_PROTO(prmine) PETSC_F90_2PTR_PROTO(prremote))
{
  const PetscMPIInt *ranks   = NULL;
  const PetscInt    *roffset = NULL;
  const PetscInt    *rmine   = NULL;
  const PetscInt    *rremote = NULL;

  *ierr = PetscSFGetRootRanks(*sf, nranks, &ranks, &roffset, &rmine, &rremote);
  if (*ierr) return;
  *ierr = F90Array1dCreate((void *)ranks, MPI_INT, 1, *nranks, aranks PETSC_F90_2PTR_PARAM(pranks));
  if (*ierr) return;
  *ierr = F90Array1dCreate((void *)roffset, MPIU_INT, 1, *nranks + 1, aroffset PETSC_F90_2PTR_PARAM(proffset));
  if (*ierr) return;
  *ierr = F90Array1dCreate((void *)rmine, MPIU_INT, 1, roffset[*nranks], armine PETSC_F90_2PTR_PARAM(prmine));
  if (*ierr) return;
  *ierr = F90Array1dCreate((void *)rremote, MPIU_INT, 1, roffset[*nranks], arremote PETSC_F90_2PTR_PARAM(prremote));
  if (*ierr) return;
}

#if defined(PETSC_HAVE_F90_ASSUMED_TYPE_NOT_PTR)
PETSC_EXTERN void petscsfbcastbegin_(PetscSF *sf, MPI_Fint *unit, const void *rptr, void *lptr, MPI_Fint *op, PetscErrorCode *ierr)
{
  MPI_Datatype dtype;
  MPI_Op       cop = MPI_Op_f2c(*op);

  *ierr = PetscMPIFortranDatatypeToC(*unit, &dtype);
  if (*ierr) return;
  *ierr = PetscSFBcastBegin(*sf, dtype, rptr, lptr, cop);
}

PETSC_EXTERN void petscsfbcastend_(PetscSF *sf, MPI_Fint *unit, const void *rptr, void *lptr, MPI_Fint *op, PetscErrorCode *ierr)
{
  MPI_Datatype dtype;
  MPI_Op       cop = MPI_Op_f2c(*op);

  *ierr = PetscMPIFortranDatatypeToC(*unit, &dtype);
  if (*ierr) return;
  *ierr = PetscSFBcastEnd(*sf, dtype, rptr, lptr, cop);
}

PETSC_EXTERN void petscsfreducebegin_(PetscSF *sf, MPI_Fint *unit, const void *lptr, void *rptr, MPI_Fint *op, PetscErrorCode *ierr)
{
  MPI_Datatype dtype;
  MPI_Op       cop = MPI_Op_f2c(*op);

  *ierr = PetscMPIFortranDatatypeToC(*unit, &dtype);
  if (*ierr) return;
  *ierr = PetscSFReduceBegin(*sf, dtype, lptr, rptr, cop);
}

PETSC_EXTERN void petscsfreduceend_(PetscSF *sf, MPI_Fint *unit, const void *lptr, void *rptr, MPI_Fint *op, PetscErrorCode *ierr)
{
  MPI_Datatype dtype;
  MPI_Op       cop = MPI_Op_f2c(*op);

  *ierr = PetscMPIFortranDatatypeToC(*unit, &dtype);
  if (*ierr) return;
  *ierr = PetscSFReduceEnd(*sf, dtype, lptr, rptr, cop);
}

#else

PETSC_EXTERN void petscsfbcastbegin_(PetscSF *sf, MPI_Fint *unit, F90Array1d *rptr, F90Array1d *lptr, MPI_Fint *op, PetscErrorCode *ierr PETSC_F90_2PTR_PROTO(rptrd) PETSC_F90_2PTR_PROTO(lptrd))
{
  MPI_Datatype dtype;
  const void  *rootdata;
  void        *leafdata;
  MPI_Op       cop = MPI_Op_f2c(*op);

  *ierr = PetscMPIFortranDatatypeToC(*unit, &dtype);
  if (*ierr) return;
  *ierr = F90Array1dAccess(rptr, dtype, (void **)&rootdata PETSC_F90_2PTR_PARAM(rptrd));
  if (*ierr) return;
  *ierr = F90Array1dAccess(lptr, dtype, (void **)&leafdata PETSC_F90_2PTR_PARAM(lptrd));
  if (*ierr) return;
  *ierr = PetscSFBcastBegin(*sf, dtype, rootdata, leafdata, cop);
}

PETSC_EXTERN void petscsfbcastend_(PetscSF *sf, MPI_Fint *unit, F90Array1d *rptr, F90Array1d *lptr, MPI_Fint *op, PetscErrorCode *ierr PETSC_F90_2PTR_PROTO(rptrd) PETSC_F90_2PTR_PROTO(lptrd))
{
  MPI_Datatype dtype;
  const void  *rootdata;
  void        *leafdata;
  MPI_Op       cop = MPI_Op_f2c(*op);

  *ierr = PetscMPIFortranDatatypeToC(*unit, &dtype);
  if (*ierr) return;
  *ierr = F90Array1dAccess(rptr, dtype, (void **)&rootdata PETSC_F90_2PTR_PARAM(rptrd));
  if (*ierr) return;
  *ierr = F90Array1dAccess(lptr, dtype, (void **)&leafdata PETSC_F90_2PTR_PARAM(lptrd));
  if (*ierr) return;
  *ierr = PetscSFBcastEnd(*sf, dtype, rootdata, leafdata, cop);
}

PETSC_EXTERN void petscsfreducebegin_(PetscSF *sf, MPI_Fint *unit, F90Array1d *lptr, F90Array1d *rptr, MPI_Fint *op, PetscErrorCode *ierr PETSC_F90_2PTR_PROTO(lptrd) PETSC_F90_2PTR_PROTO(rptrd))
{
  MPI_Datatype dtype;
  const void  *leafdata;
  void        *rootdata;
  MPI_Op       cop = MPI_Op_f2c(*op);

  *ierr = PetscMPIFortranDatatypeToC(*unit, &dtype);
  if (*ierr) return;
  *ierr = F90Array1dAccess(rptr, dtype, (void **)&rootdata PETSC_F90_2PTR_PARAM(rptrd));
  if (*ierr) return;
  *ierr = F90Array1dAccess(lptr, dtype, (void **)&leafdata PETSC_F90_2PTR_PARAM(lptrd));
  if (*ierr) return;
  *ierr = PetscSFReduceBegin(*sf, dtype, leafdata, rootdata, cop);
}

PETSC_EXTERN void petscsfreduceend_(PetscSF *sf, MPI_Fint *unit, F90Array1d *lptr, F90Array1d *rptr, MPI_Fint *op, PetscErrorCode *ierr PETSC_F90_2PTR_PROTO(lptrd) PETSC_F90_2PTR_PROTO(rptrd))
{
  MPI_Datatype dtype;
  const void  *leafdata;
  void        *rootdata;
  MPI_Op       cop = MPI_Op_f2c(*op);

  *ierr = PetscMPIFortranDatatypeToC(*unit, &dtype);
  if (*ierr) return;
  *ierr = F90Array1dAccess(rptr, dtype, (void **)&rootdata PETSC_F90_2PTR_PARAM(rptrd));
  if (*ierr) return;
  *ierr = F90Array1dAccess(lptr, dtype, (void **)&leafdata PETSC_F90_2PTR_PARAM(lptrd));
  if (*ierr) return;
  *ierr = PetscSFReduceEnd(*sf, dtype, leafdata, rootdata, cop);
}

PETSC_EXTERN void petscsfviewfromoptions_(PetscSF *ao, PetscObject obj, char *type, PetscErrorCode *ierr, PETSC_FORTRAN_CHARLEN_T len)
{
  char *t;

  FIXCHAR(type, len, t);
  CHKFORTRANNULLOBJECT(obj);
  *ierr = PetscSFViewFromOptions(*ao, obj, t);
  if (*ierr) return;
  FREECHAR(type, t);
}

PETSC_EXTERN void petscsfdestroy_(PetscSF *x, int *ierr)
{
  PETSC_FORTRAN_OBJECT_F_DESTROYED_TO_C_NULL(x);
  *ierr = PetscSFDestroy(x);
  if (*ierr) return;
  PETSC_FORTRAN_OBJECT_C_NULL_TO_F_DESTROYED(x);
}

#endif