/*
 * (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_abstract_vector
   IMPLEMENTS = unpack_double; destroy
   IMPLEMENTS = value_count;compare
   IMPLEMENTS = init
   MEMBERS = const char* verifyingMonth
   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 unpack_double(grib_accessor*, double* val, size_t* len);
static int value_count(grib_accessor*, long*);
static void destroy(grib_context*, grib_accessor*);
static void init(grib_accessor*, const long, grib_arguments*);
static void init_class(grib_accessor_class*);
static int compare(grib_accessor*, grib_accessor*);

typedef struct grib_accessor_g1end_of_interval_monthly
{
    grib_accessor att;
    /* Members defined in gen */
    /* Members defined in double */
    /* Members defined in abstract_vector */
    double* v;
    int number_of_elements;
    /* Members defined in g1end_of_interval_monthly */
    const char* verifyingMonth;
} grib_accessor_g1end_of_interval_monthly;

extern grib_accessor_class* grib_accessor_class_abstract_vector;

static grib_accessor_class _grib_accessor_class_g1end_of_interval_monthly = {
    &grib_accessor_class_abstract_vector,            /* super                     */
    "g1end_of_interval_monthly",                     /* name                      */
    sizeof(grib_accessor_g1end_of_interval_monthly), /* size                      */
    0,                                               /* inited */
    &init_class,                                     /* init_class */
    &init,                                           /* init                      */
    0,                                               /* post_init                      */
    &destroy,                                        /* free mem                       */
    0,                                               /* describes himself         */
    0,                                               /* get length of section     */
    0,                                               /* get length of string      */
    &value_count,                                    /* 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      */
    0,                                               /* grib_pack procedures long      */
    0,                                               /* grib_unpack procedures long    */
    0,                                               /* grib_pack procedures double    */
    &unpack_double,                                  /* 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   */
    0,                                               /* update_size   */
    0,                                               /* preferred_size   */
    0,                                               /* resize   */
    0,                                               /* nearest_smaller_value */
    0,                                               /* next accessor    */
    &compare,                                        /* compare vs. another accessor   */
    0,                                               /* unpack only ith value          */
    0,                                               /* unpack a subarray         */
    0,                                               /* clear          */
    0,                                               /* clone accessor          */
};


grib_accessor_class* grib_accessor_class_g1end_of_interval_monthly = &_grib_accessor_class_g1end_of_interval_monthly;


static void init_class(grib_accessor_class* c)
{
    c->dump                   = (*(c->super))->dump;
    c->next_offset            = (*(c->super))->next_offset;
    c->string_length          = (*(c->super))->string_length;
    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_long              = (*(c->super))->pack_long;
    c->unpack_long            = (*(c->super))->unpack_long;
    c->pack_double            = (*(c->super))->pack_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->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->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_g1end_of_interval_monthly* self = (grib_accessor_g1end_of_interval_monthly*)a;
    int n                                         = 0;

    self->verifyingMonth = grib_arguments_get_name(grib_handle_of_accessor(a), c, n++);
    a->flags |= GRIB_ACCESSOR_FLAG_READ_ONLY;
    a->flags |= GRIB_ACCESSOR_FLAG_FUNCTION;
    a->flags |= GRIB_ACCESSOR_FLAG_HIDDEN;

    self->number_of_elements = 6;
    self->v                  = (double*)grib_context_malloc(a->context,
                                           sizeof(double) * self->number_of_elements);

    a->length = 0;
    a->dirty  = 1;
}

static int unpack_double(grib_accessor* a, double* val, size_t* len)
{
    grib_accessor_g1end_of_interval_monthly* self = (grib_accessor_g1end_of_interval_monthly*)a;
    int ret                                       = 0;
    char verifyingMonth[7]                        = {0,};
    size_t slen = 7;
    long year = 0, month = 0, date = 0;
    const long mdays[] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
    long days    = 0;

    if (!a->dirty)
        return GRIB_SUCCESS;

    if (*len != self->number_of_elements)
        return GRIB_ARRAY_TOO_SMALL;

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

    date  = atoi(verifyingMonth);
    year  = date / 100;
    month = date - year * 100;
    if (month == 2) {
        days = 28;
        if (year % 400 == 0 || (year % 4 == 0 && year % 100 != 0))
            days = 29;
    }
    else
        days = mdays[month - 1];

    self->v[0] = year;
    self->v[1] = month;

    self->v[2] = days;
    self->v[3] = 24;
    self->v[4] = 00;
    self->v[5] = 00;

    a->dirty = 0;

    val[0] = self->v[0];
    val[1] = self->v[1];
    val[2] = self->v[2];
    val[3] = self->v[3];
    val[4] = self->v[4];
    val[5] = self->v[5];

    return ret;
}

static int value_count(grib_accessor* a, long* count)
{
    grib_accessor_g1end_of_interval_monthly* self = (grib_accessor_g1end_of_interval_monthly*)a;
    *count                                        = self->number_of_elements;
    return 0;
}

static void destroy(grib_context* c, grib_accessor* a)
{
    grib_accessor_g1end_of_interval_monthly* self = (grib_accessor_g1end_of_interval_monthly*)a;
    grib_context_free(c, self->v);
}

static int compare(grib_accessor* a, grib_accessor* b)
{
    int retval   = GRIB_SUCCESS;
    double* aval = 0;
    double* bval = 0;

    long count  = 0;
    size_t alen = 0;
    size_t blen = 0;
    int err     = 0;

    err = grib_value_count(a, &count);
    if (err)
        return err;
    alen = count;

    err = grib_value_count(b, &count);
    if (err)
        return err;
    blen = count;

    if (alen != blen)
        return GRIB_COUNT_MISMATCH;

    aval = (double*)grib_context_malloc(a->context, alen * sizeof(double));
    bval = (double*)grib_context_malloc(b->context, blen * sizeof(double));

    b->dirty = 1;
    a->dirty = 1;

    grib_unpack_double(a, aval, &alen);
    grib_unpack_double(b, bval, &blen);

    while (alen != 0) {
        if (*bval != *aval)
            retval = GRIB_DOUBLE_VALUE_MISMATCH;
        alen--;
    }

    grib_context_free(a->context, aval);
    grib_context_free(b->context, bval);

    return retval;
}
