/*
 * (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 = next_offset;byte_count
   IMPLEMENTS = destroy;sub_section
   IMPLEMENTS = get_native_type
   IMPLEMENTS = init;dump;update_size
   IMPLEMENTS = next
   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 grib_section* sub_section(grib_accessor* a);
static int get_native_type(grib_accessor*);
static long byte_count(grib_accessor*);
static long next_offset(grib_accessor*);
static void destroy(grib_context*, 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*);
static void update_size(grib_accessor*, size_t);
static grib_accessor* next(grib_accessor*, int);

typedef struct grib_accessor_section
{
    grib_accessor att;
    /* Members defined in gen */
    /* Members defined in section */
} grib_accessor_section;

extern grib_accessor_class* grib_accessor_class_gen;

static grib_accessor_class _grib_accessor_class_section = {
    &grib_accessor_class_gen,      /* super                     */
    "section",                     /* name                      */
    sizeof(grib_accessor_section), /* size                      */
    0,                             /* inited */
    &init_class,                   /* init_class */
    &init,                         /* init                      */
    0,                             /* post_init                      */
    &destroy,                      /* free mem                       */
    &dump,                         /* describes himself         */
    &next_offset,                  /* get length of section     */
    0,                             /* get length of string      */
    0,                             /* get number of values      */
    &byte_count,                   /* get number of bytes      */
    0,                             /* get offset to bytes           */
    &get_native_type,              /* get native type               */
    &sub_section,                  /* 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    */
    0,                             /* 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   */
    &update_size,                  /* update_size   */
    0,                             /* preferred_size   */
    0,                             /* resize   */
    0,                             /* nearest_smaller_value */
    &next,                         /* 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_section = &_grib_accessor_class_section;


static void init_class(grib_accessor_class* c)
{
    c->string_length          = (*(c->super))->string_length;
    c->value_count            = (*(c->super))->value_count;
    c->byte_offset            = (*(c->super))->byte_offset;
    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->unpack_string          = (*(c->super))->unpack_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->preferred_size         = (*(c->super))->preferred_size;
    c->resize                 = (*(c->super))->resize;
    c->nearest_smaller_value  = (*(c->super))->nearest_smaller_value;
    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)
{
    a->sub_section = grib_section_create(grib_handle_of_accessor(a), a);
    a->length      = 0;
    a->flags |= GRIB_ACCESSOR_FLAG_READ_ONLY;
}

static void dump(grib_accessor* a, grib_dumper* dumper)
{
    grib_dump_section(dumper, a, a->sub_section->block);
}

static long byte_count(grib_accessor* a)
{
    if (!a->length || grib_handle_of_accessor(a)->loader) {
        if (a->name[1] == '_')
            return 0;

        /* printf("adjusting sizes SECTION %s is %ld %ld\n",a->name,(long)a->offset,(long)a->length); */
        grib_section_adjust_sizes(a->sub_section, grib_handle_of_accessor(a)->loader != NULL, 0);
        /* printf("                SECTION %s is %ld %ld\n",a->name,(long)a->offset,(long)a->length);  */
    }

    /* printf("SECTION %s is %ld %d\n",a->name,a->length,a->sub_section->aclength != NULL);  */
    return a->length;
}

static long next_offset(grib_accessor* a)
{
    return a->offset + byte_count(a);
}

static void destroy(grib_context* ct, grib_accessor* a)
{
    grib_section_delete(ct, a->sub_section);
}

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

static grib_section* sub_section(grib_accessor* a)
{
    /* grib_accessor_section* self = (grib_accessor_section*)a; */
    return a->sub_section;
}

static void update_size(grib_accessor* a, size_t length)
{
    size_t size = 1;
    long len    = length;
    Assert(length <= 0x7fffffff);
    if (a->sub_section->aclength) {
        int e = grib_pack_long(a->sub_section->aclength, &len, &size);
        Assert(e == GRIB_SUCCESS);
        printf("update_length %s %ld %ld\n", a->sub_section->aclength->name,
               (long)a->sub_section->aclength->offset,
               (long)a->sub_section->aclength->length

        );
    }

    a->sub_section->length = a->length = length;
    a->sub_section->padding            = 0;

    printf("update_size %s %ld\n", a->name, a->length);

    Assert(a->length >= 0);
}

static grib_accessor* next(grib_accessor* a, int explore)
{
    grib_accessor* next = NULL;
    if (explore) {
        next = a->sub_section->block->first;
        if (!next)
            next = a->next;
    }
    else {
        next = a->next;
    }
    if (!next) {
        if (a->parent->owner)
            next = a->parent->owner->cclass->next(a->parent->owner, 0);
    }
    return next;
}
