/*
 * (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 = get_native_type;pack_missing;
   IMPLEMENTS = unpack_string; pack_string
   IMPLEMENTS = unpack_double
   IMPLEMENTS = dump
   IMPLEMENTS = compare
   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_missing(grib_accessor*);
static int pack_string(grib_accessor*, const char*, size_t* len);
static int unpack_double(grib_accessor*, double* val, size_t* len);
static int unpack_string(grib_accessor*, char*, size_t* len);
static void dump(grib_accessor*, grib_dumper*);
static void init_class(grib_accessor_class*);
static int compare(grib_accessor*, grib_accessor*);

typedef struct grib_accessor_long
{
    grib_accessor att;
    /* Members defined in gen */
    /* Members defined in long */
} grib_accessor_long;

extern grib_accessor_class* grib_accessor_class_gen;

static grib_accessor_class _grib_accessor_class_long = {
    &grib_accessor_class_gen,   /* super                     */
    "long",                     /* name                      */
    sizeof(grib_accessor_long), /* size                      */
    0,                          /* inited */
    &init_class,                /* init_class */
    0,                          /* 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           */
    &get_native_type,           /* get native type               */
    0,                          /* get sub_section                */
    &pack_missing,              /* 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  */
    &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    */
    &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_long = &_grib_accessor_class_long;


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->sub_section            = (*(c->super))->sub_section;
    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_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 int get_native_type(grib_accessor* a)
{
    return GRIB_TYPE_LONG;
}

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

static int unpack_string(grib_accessor* a, char* v, size_t* len)
{
    int err  = 0;
    long val = 0;
    size_t l = 1;
    char repres[1024];

    err = grib_unpack_long(a, &val, &l);
    /* TODO: We should catch all errors but in this case the test ERA_Gen.sh will fail
     * as the output from grib_ls will be different */
    /* if (err) return err; */
    (void)err;

    if ((val == GRIB_MISSING_LONG) && ((a->flags & GRIB_ACCESSOR_FLAG_CAN_BE_MISSING) != 0))
        sprintf(repres, "MISSING");
    else
        sprintf(repres, "%ld", val);

    l = strlen(repres) + 1;

    if (l > *len) {
        grib_context_log(a->context, GRIB_LOG_ERROR, "grib_accessor_long : unpack_string : Buffer too small for %s ", a->name);
        *len = l;
        return GRIB_BUFFER_TOO_SMALL;
    }
    /*grib_context_log(a->context,GRIB_LOG_DEBUG, "grib_accessor_long: Casting long %s to string ", a->name);*/

    *len = l;

    strcpy(v, repres);
    return GRIB_SUCCESS;
}

static int pack_missing(grib_accessor* a)
{
    size_t len = 1;
    long value = GRIB_MISSING_LONG;

    if (a->flags & GRIB_ACCESSOR_FLAG_CAN_BE_MISSING)
        return grib_pack_long(a, &value, &len);

    return GRIB_VALUE_CANNOT_BE_MISSING;
}

/*
static int is_missing(grib_accessor* a){

    size_t len = 1;
    long value = GRIB_MISSING_LONG;
    long ret=0;

    if(a->flags & GRIB_ACCESSOR_FLAG_CAN_BE_MISSING)
    {
        ret = grib_unpack_long(a,&value,&len);
        Assert( ret == 0);
        return value == GRIB_MISSING_LONG;
    }

    return 0;
}
*/

static int unpack_double(grib_accessor* a, double* val, size_t* len)
{
    size_t rlen     = 0;
    long count      = 0;
    unsigned long i = 0;
    long* values    = NULL;
    long oneval     = 0;
    int ret         = GRIB_SUCCESS;

    ret = grib_value_count(a, &count);
    if (ret)
        return ret;
    rlen = count;

    if (*len < rlen) {
        grib_context_log(a->context, GRIB_LOG_ERROR, " wrong size for %s it contains %d values ", a->name, rlen);
        *len = 0;
        return GRIB_ARRAY_TOO_SMALL;
    }

    if (rlen == 1) {
        ret = grib_unpack_long(a, &oneval, &rlen);
        if (ret != GRIB_SUCCESS)
            return ret;
        *val = oneval;
        *len = 1;
        return GRIB_SUCCESS;
    }

    values = (long*)grib_context_malloc(a->context, rlen * sizeof(long));
    if (!values)
        return GRIB_OUT_OF_MEMORY;

    ret = grib_unpack_long(a, values, &rlen);
    if (ret != GRIB_SUCCESS) {
        grib_context_free(a->context, values);
        return ret;
    }
    for (i = 0; i < rlen; i++)
        val[i] = values[i];

    grib_context_free(a->context, values);

    *len = rlen;
    return GRIB_SUCCESS;
}

static int compare(grib_accessor* a, grib_accessor* b)
{
    int retval = 0;
    long* aval = 0;
    long* 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 = (long*)grib_context_malloc(a->context, alen * sizeof(long));
    bval = (long*)grib_context_malloc(b->context, blen * sizeof(long));

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

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

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

    return retval;
}

static int pack_string(grib_accessor* a, const char* val, size_t* len)
{
    char* theEnd = NULL;
    long v       = strtol(val, &theEnd, 10);
    if (theEnd) {
        grib_context_log(a->context, GRIB_LOG_ERROR, "trying to pack \"%s\" as long", val);
        return GRIB_WRONG_TYPE;
    }
    return grib_pack_long(a, &v, len);
}
