/**
* Copyright 2005-2007 ECMWF
* 
* Licensed under the GNU Lesser General Public License which
* incorporates the terms and conditions of version 3 of the GNU
* General Public License.
* See LICENSE and gpl-3.0.txt for details.
*/


/****************************************
 *  Enrico Fucile
 ***************************************/

#include "grib_api_internal.h"

/*
   This is used by make_class.pl

   START_CLASS_DEF
   CLASS      = accessor
   SUPER      = grib_accessor_class_gen
   IMPLEMENTS = init
   IMPLEMENTS = unpack_double
   IMPLEMENTS = pack_double
   IMPLEMENTS = value_count
   IMPLEMENTS = dump;get_native_type
   MEMBERS=const char*  coded_values
   MEMBERS=const char*  number_of_values
   MEMBERS=const char*  number_of_points
   MEMBERS=const char*  latitude_of_first_point
   MEMBERS=const char*  ni
   MEMBERS=const char*  missing_value
   MEMBERS=const char*  bitmap_present
   MEMBERS=const char*  bitmap
   END_CLASS_DEF
 */

/* START_CLASS_IMP */

/*

Don't edit anything between START_CLASS_IMP and END_CLASS_IMP
Instead edit values between START_CLASS_DEF and END_CLASS_DEF
or edit "accessor.class" and rerun ./make_class.pl

*/

static int  get_native_type(grib_accessor*);
static int pack_double(grib_accessor*, const double* val,size_t *len);
static int unpack_double(grib_accessor*, double* val,size_t *len);
static long value_count(grib_accessor*);
static void dump(grib_accessor*, grib_dumper*);
static void init(grib_accessor*,const long, grib_arguments* );
static void init_class(grib_accessor_class*);

typedef struct grib_accessor_data_apply_gdsnotpresent {
    grib_accessor          att;
/* Members defined in gen */
/* Members defined in data_apply_gdsnotpresent */
	const char*  coded_values;
	const char*  number_of_values;
	const char*  number_of_points;
	const char*  latitude_of_first_point;
	const char*  ni;
	const char*  missing_value;
	const char*  bitmap_present;
	const char*  bitmap;
} grib_accessor_data_apply_gdsnotpresent;

extern grib_accessor_class* grib_accessor_class_gen;

static grib_accessor_class _grib_accessor_class_data_apply_gdsnotpresent = {
    &grib_accessor_class_gen,                      /* super                     */
    "data_apply_gdsnotpresent",                      /* name                      */
    sizeof(grib_accessor_data_apply_gdsnotpresent),  /* size                      */
    0,                           /* inited */
    &init_class,                 /* init_class */
    &init,                       /* init                      */
    0,                  /* post_init                      */
    0,                    /* free mem                       */
    &dump,                       /* describes himself         */
    0,                /* get length of section     */
    &value_count,                /* get number of values      */
    0,                 /* get number of bytes      */
    0,                /* get offset to bytes           */
    &get_native_type,            /* get native type               */
    0,                /* get sub_section                */
    0,               /* grib_pack procedures long      */
    0,               /* grib_pack procedures long      */
    0,                  /* grib_pack procedures long      */
    0,                /* grib_unpack procedures long    */
    &pack_double,                /* grib_pack procedures double    */
    &unpack_double,              /* grib_unpack procedures double  */
    0,                /* grib_pack procedures string    */
    0,              /* grib_unpack procedures string  */
    0,                 /* grib_pack procedures bytes     */
    0,               /* grib_unpack procedures bytes   */
    0,            /* pack_expression */
    0,              /* notify_change   */
    0,                /* update_size   */
    0,            /* preferred_size   */
    0,                    /* resize   */
    0,      /* nearest_smaller_value */
    0,                       /* next accessor    */
    0,                    /* compare vs. another accessor   */
    0,     /* unpack only ith value          */
    0,     /* unpack a subarray         */
    0,             		/* clear          */
};


grib_accessor_class* grib_accessor_class_data_apply_gdsnotpresent = &_grib_accessor_class_data_apply_gdsnotpresent;


static void init_class(grib_accessor_class* c)
{
	c->next_offset	=	(*(c->super))->next_offset;
	c->byte_count	=	(*(c->super))->byte_count;
	c->byte_offset	=	(*(c->super))->byte_offset;
	c->sub_section	=	(*(c->super))->sub_section;
	c->pack_missing	=	(*(c->super))->pack_missing;
	c->is_missing	=	(*(c->super))->is_missing;
	c->pack_long	=	(*(c->super))->pack_long;
	c->unpack_long	=	(*(c->super))->unpack_long;
	c->pack_string	=	(*(c->super))->pack_string;
	c->unpack_string	=	(*(c->super))->unpack_string;
	c->pack_bytes	=	(*(c->super))->pack_bytes;
	c->unpack_bytes	=	(*(c->super))->unpack_bytes;
	c->pack_expression	=	(*(c->super))->pack_expression;
	c->notify_change	=	(*(c->super))->notify_change;
	c->update_size	=	(*(c->super))->update_size;
	c->preferred_size	=	(*(c->super))->preferred_size;
	c->resize	=	(*(c->super))->resize;
	c->nearest_smaller_value	=	(*(c->super))->nearest_smaller_value;
	c->next	=	(*(c->super))->next;
	c->compare	=	(*(c->super))->compare;
	c->unpack_double_element	=	(*(c->super))->unpack_double_element;
	c->unpack_double_subarray	=	(*(c->super))->unpack_double_subarray;
	c->clear	=	(*(c->super))->clear;
}

/* END_CLASS_IMP */

static void init(grib_accessor* a,const long v, grib_arguments* args)
{
  int n=0;
  grib_accessor_data_apply_gdsnotpresent *self =(grib_accessor_data_apply_gdsnotpresent*)a;

  self->coded_values  = grib_arguments_get_name(a->parent->h,args,n++);
  self->number_of_values        = grib_arguments_get_name(a->parent->h,args,n++);
  self->number_of_points = grib_arguments_get_name(a->parent->h,args,n++);
  self->latitude_of_first_point = grib_arguments_get_name(a->parent->h,args,n++);
  self->ni = grib_arguments_get_name(a->parent->h,args,n++);
  self->missing_value = grib_arguments_get_name(a->parent->h,args,n++);
  self->bitmap_present = grib_arguments_get_name(a->parent->h,args,n++);
  self->bitmap = grib_arguments_get_name(a->parent->h,args,n++);

  a->length = 0;
}
static void dump(grib_accessor* a, grib_dumper* dumper)
{
  grib_dump_values(dumper,a);
}


static long value_count(grib_accessor* a)
{
  long number_of_points=0;
  int ret;
  grib_accessor_data_apply_gdsnotpresent *self =(grib_accessor_data_apply_gdsnotpresent*)a;

  if((ret = grib_get_long(a->parent->h,self->number_of_points,&number_of_points))
       !=  GRIB_SUCCESS) {
    grib_context_log(a->parent->h->context, GRIB_LOG_ERROR,
      "grib_accessor_data_apply_gdsnotpresent: value_count: unable to get number of points");
    return 0;
  }

  return number_of_points;
}


static int  unpack_double(grib_accessor* a, double* val, size_t *len)
{
  grib_accessor_data_apply_gdsnotpresent* self =  (grib_accessor_data_apply_gdsnotpresent*)a;

  long number_of_points=0,number_of_values=0,ni=0;
  long latitude_of_first_point=0;
  size_t i = 0;
  size_t  n_vals = grib_value_count(a);
  size_t size=0;
  long missing_value;

  int err = 0;
  double* coded_vals = NULL;

  if((err = grib_get_long(a->parent->h,self->number_of_points,&number_of_points))
       !=  GRIB_SUCCESS) return err;

  if((err = grib_get_long(a->parent->h,self->number_of_values,&number_of_values))
       !=  GRIB_SUCCESS) return err;

  if((err = grib_get_long(a->parent->h,self->latitude_of_first_point,&latitude_of_first_point))
       !=  GRIB_SUCCESS) return err;

  if((err = grib_get_long(a->parent->h,self->missing_value,&missing_value))
       !=  GRIB_SUCCESS) return err;

  if((err = grib_get_long(a->parent->h,self->ni,&ni))
       !=  GRIB_SUCCESS) return err;

  if(*len < number_of_points)
  {
    *len = n_vals;
    return GRIB_ARRAY_TOO_SMALL;
  }

  if(number_of_values > 0){
    coded_vals = grib_context_malloc(a->parent->h->context,number_of_values*sizeof(double));

    if(coded_vals == NULL)
      return GRIB_OUT_OF_MEMORY;
  }

  size=number_of_values;
  if((err=grib_get_double_array_internal(a->parent->h,self->coded_values,coded_vals,&size))
    != GRIB_SUCCESS)  {
    grib_context_free(a->parent->h->context,coded_vals);
    return err;
  }
  if (number_of_values!=size) {
    grib_context_log(a->parent->h->context, GRIB_LOG_ERROR,
      "grib_accessor_data_apply_gdsnotpresent : wrong numberOfValues %ld != %ld",
      number_of_values,size);
  }

  grib_context_log(a->parent->h->context, GRIB_LOG_DEBUG,
      "grib_accessor_data_apply_gdsnotpresent : unpack_double : creating %s, %d values",
      a->name, number_of_points);

  if (latitude_of_first_point == 0) {
    for (i=0;i < number_of_values;i++) val[i]=coded_vals[i];
    for (i=number_of_values;i<number_of_points;i++)
      val[i]=coded_vals[number_of_values-1];
  } else {
    for(i=0;i<ni-1;i++) val[i]=coded_vals[0];
    for(i=ni-1;i<number_of_points;i++) val[i]=coded_vals[i-ni+1];
  }

  *len =  number_of_points;

  grib_context_free(a->parent->h->context,coded_vals);
  return err;
}


static int pack_double(grib_accessor* a, const double* val, size_t *len)
{
  int ret=GRIB_SUCCESS;
  long bitmap_present=0;

  grib_accessor_data_apply_gdsnotpresent* self =  (grib_accessor_data_apply_gdsnotpresent*)a;

  if (*len ==0) return GRIB_NO_VALUES;

  ret=grib_set_long(a->parent->h,self->bitmap_present,bitmap_present);
  if(ret) {
    grib_context_log(a->parent->h->context, GRIB_LOG_ERROR,
       "Accessor %s cannont pack value for %s error %d \n", a->name, self->bitmap_present, ret);
    return ret;
  }

#if 0
  if(!grib_find_accessor(a->parent->h,self->bitmap)){
    grib_context_log(a->parent->h->context, GRIB_LOG_ERROR,
       "Accessor %s cannont access bitmap \n", a->name, self->bitmap_present, ret);
    return ret;
  }
#endif


  ret = grib_set_double_array_internal(a->parent->h,self->coded_values,val,*len);
  if(ret) {
    grib_context_log(a->parent->h->context, GRIB_LOG_ERROR,
       "Accessor %s cannont pack value for %s error %d \n", a->name, self->coded_values, ret);
    return ret;
  }

  return ret;
}

static int  get_native_type(grib_accessor* a)
{
/*  grib_accessor_data_apply_gdsnotpresent* self =  (grib_accessor_data_apply_gdsnotpresent*)a;
    return grib_accessor_get_native_type(grib_find_accessor(a->parent->h,self->coded_values));*/

   return GRIB_TYPE_DOUBLE;
}
