/*
 * (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_ascii
   IMPLEMENTS = pack_string;unpack_string;value_count;string_length
   IMPLEMENTS = pack_long; unpack_long
   IMPLEMENTS = get_native_type
   IMPLEMENTS = init
   MEMBERS    = const char* stepRange
   MEMBERS    = const char* stepType
   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_long(grib_accessor*, const long* val, size_t* len);
static int pack_string(grib_accessor*, const char*, size_t* len);
static int unpack_long(grib_accessor*, long* val, size_t* len);
static int unpack_string(grib_accessor*, char*, size_t* len);
static size_t string_length(grib_accessor*);
static int value_count(grib_accessor*, long*);
static void init(grib_accessor*, const long, grib_arguments*);
static void init_class(grib_accessor_class*);

typedef struct grib_accessor_mars_step
{
    grib_accessor att;
    /* Members defined in gen */
    /* Members defined in ascii */
    /* Members defined in mars_step */
    const char* stepRange;
    const char* stepType;
} grib_accessor_mars_step;

extern grib_accessor_class* grib_accessor_class_ascii;

static grib_accessor_class _grib_accessor_class_mars_step = {
    &grib_accessor_class_ascii,      /* super                     */
    "mars_step",                     /* name                      */
    sizeof(grib_accessor_mars_step), /* 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      */
    &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      */
    &pack_long,                      /* grib_pack procedures long      */
    &unpack_long,                    /* grib_unpack procedures long    */
    0,                               /* grib_pack procedures double    */
    0,                               /* grib_unpack procedures double  */
    &pack_string,                    /* 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_mars_step = &_grib_accessor_class_mars_step;


static void init_class(grib_accessor_class* c)
{
    c->dump                   = (*(c->super))->dump;
    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_double            = (*(c->super))->pack_double;
    c->unpack_double          = (*(c->super))->unpack_double;
    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 l, grib_arguments* c)
{
    int n                         = 0;
    grib_accessor_mars_step* self = (grib_accessor_mars_step*)a;
    self->stepRange               = grib_arguments_get_name(grib_handle_of_accessor(a), c, n++);
    self->stepType                = grib_arguments_get_name(grib_handle_of_accessor(a), c, n++);
}

static int pack_string(grib_accessor* a, const char* val, size_t* len)
{
    char stepType[100];
    size_t stepTypeLen = 100;
    char buf[100]      = {0,};
    int ret;
    grib_accessor_mars_step* self = (grib_accessor_mars_step*)a;
    grib_accessor* stepRangeAcc   = grib_find_accessor(grib_handle_of_accessor(a), self->stepRange);

    if (!stepRangeAcc) {
        grib_context_log(a->context, GRIB_LOG_ERROR, "%s not found", self->stepRange);
        return GRIB_NOT_FOUND;
    }

    if ((ret = grib_get_string(grib_handle_of_accessor(a), self->stepType, stepType, &stepTypeLen)) != GRIB_SUCCESS)
        return ret;

    if (!strcmp(stepType, "instant"))
        sprintf(buf, "%s", val);
    else
        sprintf(buf, "0-%s", val);

    return grib_pack_string(stepRangeAcc, buf, len);
}

static int unpack_string(grib_accessor* a, char* val, size_t* len)
{
    int ret                       = 0;
    grib_accessor_mars_step* self = (grib_accessor_mars_step*)a;
    char buf[100]                 = {0,};
    char* p       = NULL;
    size_t buflen = 100;
    long step;
    grib_accessor* stepRangeAcc = grib_find_accessor(grib_handle_of_accessor(a), self->stepRange);

    if (!stepRangeAcc) {
        grib_context_log(a->context, GRIB_LOG_ERROR, "%s not found", self->stepRange);
        return GRIB_NOT_FOUND;
    }

    if ((ret = grib_unpack_string(stepRangeAcc, buf, &buflen)) != GRIB_SUCCESS)
        return ret;

    if (*len < buflen) {
        grib_context_log(a->context, GRIB_LOG_ERROR,
                         "grib_accessor_class_mars_step: Buffer too small for %s. It is %ld bytes long (len=%ld)\n",
                         a->name, buflen, *len);
        *len = buflen;
        return GRIB_BUFFER_TOO_SMALL;
    }

    strcpy(val, buf);
    step = strtol(buf, &p, 10);

    if (p != NULL && *p == '-' && step == 0)
        strcpy(val, ++p);

    *len = strlen(val);

    return ret;
}

static int pack_long(grib_accessor* a, const long* val, size_t* len)
{
    char buff[100] = {0,};
    size_t bufflen = 100;

    sprintf(buff, "%ld", *val);

    return pack_string(a, buff, &bufflen);
}

static int unpack_long(grib_accessor* a, long* val, size_t* len)
{
    grib_accessor_mars_step* self = (grib_accessor_mars_step*)a;
    grib_accessor* stepRangeAcc   = grib_find_accessor(grib_handle_of_accessor(a), self->stepRange);

    if (!stepRangeAcc)
        return GRIB_NOT_FOUND;

    return grib_unpack_long(stepRangeAcc, val, len);
}

static int value_count(grib_accessor* a, long* count)
{
    *count = 1;
    return 0;
}

static size_t string_length(grib_accessor* a)
{
    return 16;
}

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