/*
 * (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_long
   IMPLEMENTS = unpack_long;pack_long
   IMPLEMENTS = unpack_string
   IMPLEMENTS = init;dump
   MEMBERS=const char* hour
   MEMBERS=const char* minute
   MEMBERS=const char* second
   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 pack_long(grib_accessor*, const long* val, 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 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_time
{
    grib_accessor att;
    /* Members defined in gen */
    /* Members defined in long */
    /* Members defined in time */
    const char* hour;
    const char* minute;
    const char* second;
} grib_accessor_time;

extern grib_accessor_class* grib_accessor_class_long;

static grib_accessor_class _grib_accessor_class_time = {
    &grib_accessor_class_long,  /* super                     */
    "time",                     /* name                      */
    sizeof(grib_accessor_time), /* size                      */
    0,                          /* inited */
    &init_class,                /* init_class */
    &init,                      /* init                      */
    0,                          /* post_init                      */
    0,                          /* free mem                       */
    &dump,                      /* describes himself         */
    0,                          /* get length of section     */
    0,                          /* get length of string      */
    0,                          /* get number of values      */
    0,                          /* get number of bytes      */
    0,                          /* get offset to bytes           */
    0,                          /* 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  */
    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_time = &_grib_accessor_class_time;


static void init_class(grib_accessor_class* c)
{
    c->next_offset            = (*(c->super))->next_offset;
    c->string_length          = (*(c->super))->string_length;
    c->value_count            = (*(c->super))->value_count;
    c->byte_count             = (*(c->super))->byte_count;
    c->byte_offset            = (*(c->super))->byte_offset;
    c->get_native_type        = (*(c->super))->get_native_type;
    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            = (*(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 l, grib_arguments* c)
{
    grib_accessor_time* self = (grib_accessor_time*)a;
    grib_handle* hand        = grib_handle_of_accessor(a);
    int n                    = 0;

    self->hour   = grib_arguments_get_name(hand, c, n++);
    self->minute = grib_arguments_get_name(hand, c, n++);
    self->second = grib_arguments_get_name(hand, c, n++);
}

static void dump(grib_accessor* a, grib_dumper* dumper)
{
    grib_dump_long(dumper, a, NULL);
}

static int unpack_long(grib_accessor* a, long* val, size_t* len)
{
    int ret                  = 0;
    grib_accessor_time* self = (grib_accessor_time*)a;
    long hour                = 0;
    long minute              = 0;
    long second              = 0;
    grib_handle* hand        = grib_handle_of_accessor(a);

    if ((ret = grib_get_long_internal(hand, self->hour, &hour)) != GRIB_SUCCESS)
        return ret;
    if ((ret = grib_get_long_internal(hand, self->minute, &minute)) != GRIB_SUCCESS)
        return ret;
    if ((ret = grib_get_long_internal(hand, self->second, &second)) != GRIB_SUCCESS)
        return ret;

    /* We ignore the 'seconds' in our time calculation! */
    if (second != 0) {
        grib_context_log(a->context, GRIB_LOG_ERROR,
                         "Truncating time: non-zero seconds(%d) ignored", second);
    }

    if (*len < 1)
        return GRIB_WRONG_ARRAY_SIZE;

    *val = hour * 100 + minute;

    if (hour == 255)
        *val = 12 * 100;

    if (hour != 255 && minute == 255)
        *val = hour * 100;

    return GRIB_SUCCESS;
}

/* TODO: Check for a valid date */

static int pack_long(grib_accessor* a, const long* val, size_t* len)
{
    int ret                  = 0;
    long v                   = val[0];
    grib_accessor_time* self = (grib_accessor_time*)a;
    grib_handle* hand        = grib_handle_of_accessor(a);
    long hour                = 0;
    long minute              = 0;
    long second              = 0;

    if (*len != 1)
        return GRIB_WRONG_ARRAY_SIZE;

    hour   = v / 100;
    minute = v % 100;
    second = 0; /* We ignore the 'seconds' in our time calculation! */

    if ((ret = grib_set_long_internal(hand, self->hour, hour)) != GRIB_SUCCESS)
        return ret;
    if ((ret = grib_set_long_internal(hand, self->minute, minute)) != GRIB_SUCCESS)
        return ret;
    if ((ret = grib_set_long_internal(hand, self->second, second)) != GRIB_SUCCESS)
        return ret;

    return GRIB_SUCCESS;
}

static int unpack_string(grib_accessor* a, char* val, size_t* len)
{
    long v       = 0;
    size_t lsize = 1;

    unpack_long(a, &v, &lsize);

    if (*len < 5) {
        grib_context_log(a->context, GRIB_LOG_ERROR, "grib_accessor_time : unpack_string : Buffer too small for %s ", a->name);

        *len = 5;
        return GRIB_BUFFER_TOO_SMALL;
    }

    sprintf(val, "%04ld", v);

    len[0] = 5;
    return GRIB_SUCCESS;
}
