/*
 * (C) Copyright 2005- ECMWF.
 *
 * This software is licensed under the terms of the Apache Licence Version 2.0
 * which can be obtained at http://www.apache.org/licenses/LICENSE-2.0.
 *
 * In applying this licence, ECMWF does not waive the privileges and immunities granted to it by
 * virtue of its status as an intergovernmental organisation nor does it submit to any jurisdiction.
 */

#include "grib_api_internal.h"

/*
   This is used by make_class.pl

   START_CLASS_DEF
   CLASS      = accessor
   SUPER      = grib_accessor_class_gen
   IMPLEMENTS = init;unpack_string; get_native_type;string_length
   MEMBERS = const char* N
   MEMBERS = const char* Ni
   MEMBERS = const char* isOctahedral
   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 unpack_string(grib_accessor*, char*, size_t* len);
static size_t string_length(grib_accessor*);
static void init(grib_accessor*, const long, grib_arguments*);
static void init_class(grib_accessor_class*);

typedef struct grib_accessor_gaussian_grid_name
{
    grib_accessor att;
    /* Members defined in gen */
    /* Members defined in gaussian_grid_name */
    const char* N;
    const char* Ni;
    const char* isOctahedral;
} grib_accessor_gaussian_grid_name;

extern grib_accessor_class* grib_accessor_class_gen;

static grib_accessor_class _grib_accessor_class_gaussian_grid_name = {
    &grib_accessor_class_gen,                 /* super                     */
    "gaussian_grid_name",                     /* name                      */
    sizeof(grib_accessor_gaussian_grid_name), /* size                      */
    0,                                        /* inited */
    &init_class,                              /* init_class */
    &init,                                    /* init                      */
    0,                                        /* post_init                      */
    0,                                        /* free mem                       */
    0,                                        /* describes himself         */
    0,                                        /* get length of section     */
    &string_length,                           /* get length of string      */
    0,                                        /* 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    */
    0,                                        /* grib_pack procedures double    */
    0,                                        /* grib_unpack procedures double  */
    0,                                        /* grib_pack procedures string    */
    &unpack_string,                           /* grib_unpack procedures string  */
    0,                                        /* grib_pack array procedures string    */
    0,                                        /* grib_unpack array 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          */
    0,                                        /* clone accessor          */
};


grib_accessor_class* grib_accessor_class_gaussian_grid_name = &_grib_accessor_class_gaussian_grid_name;


static void init_class(grib_accessor_class* c)
{
    c->dump                   = (*(c->super))->dump;
    c->next_offset            = (*(c->super))->next_offset;
    c->value_count            = (*(c->super))->value_count;
    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_double            = (*(c->super))->pack_double;
    c->unpack_double          = (*(c->super))->unpack_double;
    c->pack_string            = (*(c->super))->pack_string;
    c->pack_string_array      = (*(c->super))->pack_string_array;
    c->unpack_string_array    = (*(c->super))->unpack_string_array;
    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;
    c->make_clone             = (*(c->super))->make_clone;
}

/* END_CLASS_IMP */

static void init(grib_accessor* a, const long len, grib_arguments* arg)
{
    grib_accessor_gaussian_grid_name* self = (grib_accessor_gaussian_grid_name*)a;
    int n                                  = 0;

    self->N            = grib_arguments_get_name(a->parent->h, arg, n++);
    self->Ni           = grib_arguments_get_name(a->parent->h, arg, n++);
    self->isOctahedral = grib_arguments_get_name(a->parent->h, arg, n++);
    a->length          = 0;
    a->flags |= GRIB_ACCESSOR_FLAG_READ_ONLY;
    a->flags |= GRIB_ACCESSOR_FLAG_EDITION_SPECIFIC;
}

static int get_native_type(grib_accessor* a)
{
    return GRIB_TYPE_STRING;
}

#define MAX_GRIDNAME_LEN 16

static int unpack_string(grib_accessor* a, char* v, size_t* len)
{
    grib_accessor_gaussian_grid_name* self = (grib_accessor_gaussian_grid_name*)a;

    long N = 0, Ni = 0, isOctahedral = 0;
    char tmp[MAX_GRIDNAME_LEN] = {0,};
    size_t length = 0;
    int ret       = GRIB_SUCCESS;

    if ((ret = grib_get_long_internal(a->parent->h, self->N, &N)) != GRIB_SUCCESS)
        return ret;
    if ((ret = grib_get_long_internal(a->parent->h, self->Ni, &Ni)) != GRIB_SUCCESS)
        return ret;
    if ((ret = grib_get_long_internal(a->parent->h, self->isOctahedral, &isOctahedral)) != GRIB_SUCCESS)
        return ret;

    if (Ni == GRIB_MISSING_LONG) {
        /* reduced gaussian grid */
        if (isOctahedral == 1) {
            sprintf(tmp, "O%ld", N);
        }
        else {
            sprintf(tmp, "N%ld", N);
        }
    }
    else {
        /* regular gaussian grid */
        sprintf(tmp, "F%ld", N);
    }
    length = strlen(tmp) + 1;

    if (*len < length) {
        *len = length;
        return GRIB_BUFFER_TOO_SMALL;
    }

    strcpy(v, tmp);
    *len = length;
    return GRIB_SUCCESS;
}

static size_t string_length(grib_accessor* a)
{
    return MAX_GRIDNAME_LEN;
}
