/*
 * Copyright 2005-2016 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 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          */
};


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_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;
}

/* END_CLASS_IMP */

static void init(grib_accessor* a,const long l, grib_arguments* c)
{
  grib_accessor_time* self = (grib_accessor_time*)a;
  int n = 0;

  self->hour = grib_arguments_get_name(a->parent->h,c,n++);
  self->minute    = grib_arguments_get_name(a->parent->h,c,n++);
  self->second   = grib_arguments_get_name(a->parent->h,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;

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

  /* We ignore the 'seconds' in our time calculation! */
  if (second != 0) {
     grib_context_log(a->parent->h->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;

  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(a->parent->h,self->hour,hour))!=GRIB_SUCCESS)
    return ret;
  if ((ret=grib_set_long_internal(a->parent->h,self->minute,minute))!=GRIB_SUCCESS)
    return ret;
  if ((ret=grib_set_long_internal(a->parent->h,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->parent->h->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;
}
