#define PETSCDM_DLL
#include <petsc/private/dmswarmimpl.h>    /*I   "petscdmswarm.h"   I*/
#include "data_bucket.h"

//typedef PetscErrorCode (*swarm_project)(DM,DM,Vec) DMSwarmProjectMethod; /* swarm, geometry, result */

//typedef enum { PROJECT_DMDA_AQ1=0, PROJECT_DMDA_P0 } DMSwarmDMDAProjectionType;

#if 0

/* Defines what the local space will be */
PetscErrorCode DMSwarmSetOverlap(void)
{
  
  PetscFunctionReturn(0);
}


/* coordinates */
/*
DMGetCoordinateDM returns self
DMGetCoordinates and DMGetCoordinatesLocal return same thing
Local view could be used to define overlapping information
*/

#endif

#undef __FUNCT__
#define __FUNCT__ "DMSwarmVectorDefineField"
PETSC_EXTERN PetscErrorCode DMSwarmVectorDefineField(DM dm,const char fieldname[])
{
  DM_Swarm *swarm = (DM_Swarm*)dm->data;
  PetscErrorCode ierr;
  PetscInt bs,n;
  PetscScalar *array;
  PetscDataType type;

  DataBucketGetSizes(swarm->db,&n,NULL,NULL);
  ierr = DMSwarmGetField(dm,fieldname,&bs,&type,(void**)&array);CHKERRQ(ierr);

  /* Check all fields are of type PETSC_REAL or PETSC_SCALAR */
  if (type != PETSC_REAL) SETERRQ(PetscObjectComm((PetscObject)dm),PETSC_ERR_SUP,"Only valid for PETSC_REAL");
  
  PetscSNPrintf(swarm->vec_field_name,PETSC_MAX_PATH_LEN-1,"%s",fieldname);
  swarm->vec_field_set = PETSC_TRUE;
  swarm->vec_field_bs = 1;//bs;
  swarm->vec_field_nlocal = n;
  
  PetscFunctionReturn(0);
}

/* requires DMSwarmDefineFieldVector has been called */
#undef __FUNCT__
#define __FUNCT__ "DMCreateGlobalVector_Swarm"
PetscErrorCode DMCreateGlobalVector_Swarm(DM dm,Vec *vec)
{
  DM_Swarm *swarm = (DM_Swarm*)dm->data;
  PetscErrorCode ierr;
  Vec x;
  char name[PETSC_MAX_PATH_LEN];

  if (!swarm->vec_field_set) SETERRQ(PetscObjectComm((PetscObject)dm),PETSC_ERR_USER,"Must call DMSwarmVectorDefineField first");
  PetscSNPrintf(name,PETSC_MAX_PATH_LEN-1,"DMSwarmField_%s",swarm->vec_field_name);
  ierr = VecCreate(PetscObjectComm((PetscObject)dm),&x);CHKERRQ(ierr);
  ierr = PetscObjectSetName((PetscObject)x,name);CHKERRQ(ierr);
  ierr = VecSetSizes(x,swarm->vec_field_nlocal,PETSC_DETERMINE);CHKERRQ(ierr);
  ierr = VecSetBlockSize(x,swarm->vec_field_bs);CHKERRQ(ierr);
  ierr = VecSetFromOptions(x);CHKERRQ(ierr);
  *vec = x;
  
  PetscFunctionReturn(0);
}

/* requires DMSwarmDefineFieldVector has been called */
#undef __FUNCT__
#define __FUNCT__ "DMCreateLocalVector_Swarm"
PetscErrorCode DMCreateLocalVector_Swarm(DM dm,Vec *vec)
{
  DM_Swarm *swarm = (DM_Swarm*)dm->data;
  PetscErrorCode ierr;
  Vec x;
  
  char name[PETSC_MAX_PATH_LEN];
  
  if (!swarm->vec_field_set) SETERRQ(PetscObjectComm((PetscObject)dm),PETSC_ERR_USER,"Must call DMSwarmVectorDefineField first");
  PetscSNPrintf(name,PETSC_MAX_PATH_LEN-1,"DMSwarmField_%s",swarm->vec_field_name);
  ierr = VecCreate(PETSC_COMM_SELF,&x);CHKERRQ(ierr);
  ierr = PetscObjectSetName((PetscObject)x,name);CHKERRQ(ierr);
  ierr = VecSetSizes(x,swarm->vec_field_nlocal,swarm->vec_field_nlocal);CHKERRQ(ierr);
  ierr = VecSetBlockSize(x,swarm->vec_field_bs);CHKERRQ(ierr);
  ierr = VecSetFromOptions(x);CHKERRQ(ierr);
  *vec = x;
  
  PetscFunctionReturn(0);
}

#undef __FUNCT__
#define __FUNCT__ "DMSwarmCreateGlobalVectorFromField"
PETSC_EXTERN PetscErrorCode DMSwarmCreateGlobalVectorFromField(DM dm,const char fieldname[],Vec *vec)
{
  DM_Swarm *swarm = (DM_Swarm*)dm->data;
  PetscErrorCode ierr;
  PetscInt bs,n;
  PetscScalar *array;
  Vec x;
  PetscDataType type;
  char name[PETSC_MAX_PATH_LEN];
  
  DataBucketGetSizes(swarm->db,&n,NULL,NULL);
  ierr = DMSwarmGetField(dm,fieldname,&bs,&type,(void**)&array);CHKERRQ(ierr);

  /* Check all fields are of type PETSC_REAL or PETSC_SCALAR */
  if (type != PETSC_REAL) SETERRQ(PetscObjectComm((PetscObject)dm),PETSC_ERR_SUP,"Only valid for PETSC_REAL");
  
  ierr = VecCreateSeqWithArray(PetscObjectComm((PetscObject)dm),1,n,array,&x);CHKERRQ(ierr);
  
  PetscSNPrintf(name,PETSC_MAX_PATH_LEN-1,"DMSwarm_VecFieldInPlace_%s",fieldname);
  ierr = PetscObjectComposeFunction((PetscObject)x,name,DMSwarmDestroyGlobalVectorFromField);CHKERRQ(ierr);
  
  /* Set guard */
  
  *vec = x;
  PetscFunctionReturn(0);
}

#undef __FUNCT__
#define __FUNCT__ "DMSwarmDestroyGlobalVectorFromField"
PETSC_EXTERN PetscErrorCode DMSwarmDestroyGlobalVectorFromField(DM dm,const char fieldname[],Vec *vec)
{
  DM_Swarm *swarm = (DM_Swarm*)dm->data;
  PetscErrorCode ierr;
  DataField gfield;
  char name[PETSC_MAX_PATH_LEN];
  void (*fptr)(void);
  
  /* get data field */
  DataBucketGetDataFieldByName(swarm->db,fieldname,&gfield);
  
  /* check vector is an inplace array */
  PetscSNPrintf(name,PETSC_MAX_PATH_LEN-1,"DMSwarm_VecFieldInPlace_%s",fieldname);
  ierr = PetscObjectQueryFunction((PetscObject)(*vec),name,&fptr);CHKERRQ(ierr);
  if (!fptr) SETERRQ1(PetscObjectComm((PetscObject)dm),PETSC_ERR_USER,"Vector being destroyed was not created from DMSwarm field(%s)",fieldname);
  
  /* restore data field */
  DataFieldRestoreAccess(gfield);
  
  ierr = VecDestroy(vec);CHKERRQ(ierr);
  
  PetscFunctionReturn(0);
}

/*
PETSC_EXTERN PetscErrorCode DMSwarmCreateGlobalVectorFromFields(DM dm,const PetscInt nf,const char *fieldnames[],Vec *vec)
{
  PetscFunctionReturn(0);
}

PETSC_EXTERN PetscErrorCode DMSwarmRestoreGlobalVectorFromFields(DM dm,Vec *vec)
{
  PetscFunctionReturn(0);
}
*/
 
#undef __FUNCT__
#define __FUNCT__ "DMSwarmInitializeFieldRegister"
PETSC_EXTERN PetscErrorCode DMSwarmInitializeFieldRegister(DM dm)
{
  DM_Swarm *swarm = (DM_Swarm*)dm->data;
  swarm->field_registration_initialized = PETSC_TRUE;
  PetscFunctionReturn(0);
}

#undef __FUNCT__
#define __FUNCT__ "DMSwarmFinalizeFieldRegister"
PETSC_EXTERN PetscErrorCode DMSwarmFinalizeFieldRegister(DM dm)
{
  DM_Swarm *swarm = (DM_Swarm*)dm->data;
  swarm->field_registration_finalized = PETSC_TRUE;
  DataBucketFinalize(swarm->db);
  PetscFunctionReturn(0);
}

#undef __FUNCT__
#define __FUNCT__ "DMSwarmSetLocalSizes"
PETSC_EXTERN PetscErrorCode DMSwarmSetLocalSizes(DM dm,PetscInt nlocal,PetscInt buffer)
{
  DM_Swarm *swarm = (DM_Swarm*)dm->data;

  DataBucketSetSizes(swarm->db,nlocal,buffer);
  
  PetscFunctionReturn(0);
}

#undef __FUNCT__
#define __FUNCT__ "DMSwarmRegisterPetscDatatypeField"
PETSC_EXTERN PetscErrorCode DMSwarmRegisterPetscDatatypeField(DM dm,const char fieldname[],PetscInt blocksize,PetscDataType type)
{
  DM_Swarm *swarm = (DM_Swarm*)dm->data;
  size_t size;
  
  if (!swarm->field_registration_initialized) SETERRQ(PetscObjectComm((PetscObject)dm),PETSC_ERR_USER,"Must call DMSwarmInitializeFieldRegister() first");
  if (swarm->field_registration_finalized) SETERRQ(PetscObjectComm((PetscObject)dm),PETSC_ERR_USER,"Cannot register additional fields after calling DMSwarmFinalizeFieldRegister() first");
  
  if (type == PETSC_OBJECT) SETERRQ(PetscObjectComm((PetscObject)dm),PETSC_ERR_SUP,"Valid for {char,short,int,long,float,double}");
  if (type == PETSC_FUNCTION) SETERRQ(PetscObjectComm((PetscObject)dm),PETSC_ERR_SUP,"Valid for {char,short,int,long,float,double}");
  if (type == PETSC_STRING) SETERRQ(PetscObjectComm((PetscObject)dm),PETSC_ERR_SUP,"Valid for {char,short,int,long,float,double}");
  if (type == PETSC_STRUCT) SETERRQ(PetscObjectComm((PetscObject)dm),PETSC_ERR_SUP,"Valid for {char,short,int,long,float,double}");
  if (type == PETSC_DATATYPE_UNKNOWN) SETERRQ(PetscObjectComm((PetscObject)dm),PETSC_ERR_SUP,"Valid for {char,short,int,long,float,double}");
  
  switch (type) {
    case PETSC_CHAR:
      size = sizeof(PetscChar);
      break;
    case PETSC_SHORT:
      size = sizeof(PetscShort);
      break;
    case PETSC_INT:
      size = sizeof(PetscInt);
      break;
    case PETSC_LONG:
      size = sizeof(Petsc64bitInt);
      break;
    case PETSC_FLOAT:
      size = sizeof(PetscFloat);
      break;
    case PETSC_DOUBLE:
      size = sizeof(PetscReal);
      break;
      
    default:
      SETERRQ(PetscObjectComm((PetscObject)dm),PETSC_ERR_SUP,"Valid for {char,short,int,long,float,double}");
      break;
  }
  
  /* Load a specific data type into data bucket, specifying textual name and its size in bytes */
	DataBucketRegisterField(swarm->db,fieldname,size,NULL);
  swarm->db->field[swarm->db->nfields-1]->petsc_type = type;
  
  PetscFunctionReturn(0);
}

#undef __FUNCT__
#define __FUNCT__ "DMSwarmRegisterUserStructField"
PETSC_EXTERN PetscErrorCode DMSwarmRegisterUserStructField(DM dm,const char fieldname[],size_t size)
{
  DM_Swarm *swarm = (DM_Swarm*)dm->data;
  
	DataBucketRegisterField(swarm->db,fieldname,size,NULL);
  swarm->db->field[swarm->db->nfields-1]->petsc_type = PETSC_STRUCT ;
  
  PetscFunctionReturn(0);
}

#undef __FUNCT__
#define __FUNCT__ "DMSwarmRegisterUserDatatypeField"
PETSC_EXTERN PetscErrorCode DMSwarmRegisterUserDatatypeField(DM dm,const char fieldname[],size_t size)
{
  DM_Swarm *swarm = (DM_Swarm*)dm->data;

	DataBucketRegisterField(swarm->db,fieldname,size,NULL);
  swarm->db->field[swarm->db->nfields-1]->petsc_type = PETSC_DATATYPE_UNKNOWN;
  
  PetscFunctionReturn(0);
}

#undef __FUNCT__
#define __FUNCT__ "DMSwarmGetField"
PETSC_EXTERN PetscErrorCode DMSwarmGetField(DM dm,const char fieldname[],PetscInt *blocksize,PetscDataType *type,void **data)
{
  DM_Swarm *swarm = (DM_Swarm*)dm->data;
  DataField gfield;
  
  DataBucketGetDataFieldByName(swarm->db,fieldname,&gfield);
  DataFieldGetAccess(gfield);
  DataFieldGetEntries(gfield,data);
  if (blocksize) {}
  if (type) { *type = gfield->petsc_type; }
  
  PetscFunctionReturn(0);
}

#undef __FUNCT__
#define __FUNCT__ "DMSwarmRestoreField"
PETSC_EXTERN PetscErrorCode DMSwarmRestoreField(DM dm,const char fieldname[],PetscInt *blocksize,PetscDataType *type,void **data)
{
  DM_Swarm *swarm = (DM_Swarm*)dm->data;
  DataField gfield;
  
  DataBucketGetDataFieldByName(swarm->db,fieldname,&gfield);
  DataFieldRestoreAccess(gfield);
  if (data) *data = NULL;
  
  PetscFunctionReturn(0);
}


#undef __FUNCT__
#define __FUNCT__ "DMDestroy_Swarm"
PetscErrorCode DMDestroy_Swarm(DM dm)
{
  DM_Swarm *swarm = (DM_Swarm*)dm->data;
  PetscErrorCode ierr;

  PetscFunctionBegin;
  DataBucketDestroy(&swarm->db);
  ierr = PetscFree(swarm);CHKERRQ(ierr);
  PetscFunctionReturn(0);
}

#undef __FUNCT__
#define __FUNCT__ "DMView_Swarm"
PetscErrorCode DMView_Swarm(DM dm, PetscViewer viewer)
{
  DM_Swarm *swarm = (DM_Swarm*)dm->data;
  PetscBool      iascii,ibinary,ishdf5,isvtk;
  PetscErrorCode ierr;
  
  PetscFunctionBegin;
  PetscValidHeaderSpecific(dm,DM_CLASSID,1);
  PetscValidHeaderSpecific(viewer,PETSC_VIEWER_CLASSID,2);
  ierr = PetscObjectTypeCompare((PetscObject)viewer, PETSCVIEWERASCII, &iascii);CHKERRQ(ierr);
  ierr = PetscObjectTypeCompare((PetscObject)viewer, PETSCVIEWERBINARY,&ibinary);CHKERRQ(ierr);
  ierr = PetscObjectTypeCompare((PetscObject)viewer, PETSCVIEWERVTK,   &isvtk);CHKERRQ(ierr);
  ierr = PetscObjectTypeCompare((PetscObject)viewer, PETSCVIEWERHDF5,  &ishdf5);CHKERRQ(ierr);
  if (iascii) {
    DataBucketView(PetscObjectComm((PetscObject)dm),swarm->db,NULL,DATABUCKET_VIEW_STDOUT);
  } else if (ibinary) {
    SETERRQ(PetscObjectComm((PetscObject)dm),PETSC_ERR_SUP,"NO VTK support");
  } else if (ishdf5) {
#if defined(PETSC_HAVE_HDF5)
    SETERRQ(PetscObjectComm((PetscObject)dm),PETSC_ERR_SUP,"NO HDF5 support");
#else
    SETERRQ(PetscObjectComm((PetscObject)dm),PETSC_ERR_SUP,"HDF5 not supported. Please reconfigure using --download-hdf5");
#endif
  } else if (isvtk) {
    SETERRQ(PetscObjectComm((PetscObject)dm),PETSC_ERR_SUP,"NO VTK support");
  }
  PetscFunctionReturn(0);
}

#undef __FUNCT__
#define __FUNCT__ "DMCreate_Swarm"
PETSC_EXTERN PetscErrorCode DMCreate_Swarm(DM dm)
{
  DM_Swarm      *swarm;
  PetscErrorCode ierr;
  
  PetscFunctionBegin;
  PetscValidHeaderSpecific(dm, DM_CLASSID, 1);
  ierr     = PetscNewLog(dm,&swarm);CHKERRQ(ierr);
  
  DataBucketCreate(&swarm->db);
  swarm->vec_field_set = PETSC_FALSE;
  
  dm->dim  = 0;
  dm->data = swarm;
  
  dm->ops->view                            = DMView_Swarm;
  dm->ops->load                            = NULL;
  dm->ops->setfromoptions                  = NULL;
  dm->ops->clone                           = NULL;
  dm->ops->setup                           = NULL;
  dm->ops->createdefaultsection            = NULL;
  dm->ops->createdefaultconstraints        = NULL;
  dm->ops->createglobalvector              = DMCreateGlobalVector_Swarm;
  dm->ops->createlocalvector               = DMCreateLocalVector_Swarm;
  dm->ops->getlocaltoglobalmapping         = NULL;
  dm->ops->createfieldis                   = NULL;
  dm->ops->createcoordinatedm              = NULL;
  dm->ops->getcoloring                     = NULL;
  dm->ops->creatematrix                    = NULL;
  dm->ops->createinterpolation             = NULL;
  dm->ops->getaggregates                   = NULL;
  dm->ops->getinjection                    = NULL;
  dm->ops->refine                          = NULL;
  dm->ops->coarsen                         = NULL;
  dm->ops->refinehierarchy                 = NULL;
  dm->ops->coarsenhierarchy                = NULL;
  dm->ops->globaltolocalbegin              = NULL;
  dm->ops->globaltolocalend                = NULL;
  dm->ops->localtoglobalbegin              = NULL;
  dm->ops->localtoglobalend                = NULL;
  dm->ops->destroy                         = DMDestroy_Swarm;
  dm->ops->createsubdm                     = NULL;
  dm->ops->getdimpoints                    = NULL;
  dm->ops->locatepoints                    = NULL;
  
  PetscFunctionReturn(0);
}