/*
 * (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.
 */
/***********************************************************
 *  Enrico Fucile
 ***********************************************************/

#include "grib_api_internal.h"
/*
   This is used by make_class.pl

   START_CLASS_DEF
   CLASS      = accessor
   SUPER      = grib_accessor_class_gen
   IMPLEMENTS = unpack_string;pack_string
   IMPLEMENTS = unpack_long;pack_long
   IMPLEMENTS = unpack_double;pack_double
   IMPLEMENTS = init;dump;string_length
   IMPLEMENTS = post_init;value_count
   IMPLEMENTS = next_offset
   IMPLEMENTS = get_native_type
   IMPLEMENTS = compare
   MEMBERS = char endCharacter
   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_double(grib_accessor*, const double* val, size_t* len);
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_double(grib_accessor*, double* 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 size_t string_length(grib_accessor*);
static long next_offset(grib_accessor*);
static int value_count(grib_accessor*, long*);
static void dump(grib_accessor*, grib_dumper*);
static void init(grib_accessor*, const long, grib_arguments*);
static void post_init(grib_accessor*);
static void init_class(grib_accessor_class*);
static int compare(grib_accessor*, grib_accessor*);

typedef struct grib_accessor_group
{
    grib_accessor att;
    /* Members defined in gen */
    /* Members defined in group */
    char endCharacter;
} grib_accessor_group;

extern grib_accessor_class* grib_accessor_class_gen;

static grib_accessor_class _grib_accessor_class_group = {
    &grib_accessor_class_gen,    /* super                     */
    "group",                     /* name                      */
    sizeof(grib_accessor_group), /* size                      */
    0,                           /* inited */
    &init_class,                 /* init_class */
    &init,                       /* init                      */
    &post_init,                  /* post_init                      */
    0,                           /* free mem                       */
    &dump,                       /* describes himself         */
    &next_offset,                /* 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    */
    &pack_double,                /* 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_group = &_grib_accessor_class_group;


static void init_class(grib_accessor_class* c)
{
    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_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 len, grib_arguments* arg)
{
    grib_buffer* buffer       = grib_handle_of_accessor(a)->buffer;
    grib_accessor_group* self = (grib_accessor_group*)a;

    size_t i = 0;
    unsigned char* v;
    const char* s = grib_arguments_get_string(grib_handle_of_accessor(a), arg, 0);

    if (s && strlen(s) > 1) {
        grib_context_log(a->context, GRIB_LOG_WARNING,
                         "Using only first character as group end of %s not the string %s", a->name, s);
    }

    self->endCharacter = s ? s[0] : 0;

    v = buffer->data + a->offset;
    i = 0;
    if (s) {
        while (*v != self->endCharacter && i <= buffer->ulength) {
            if (*v > 126)
                *v = 32;
            v++;
            i++;
        }
    }
    else {
        while (*v > 32 && *v != 61 && *v < 127 && i <= buffer->ulength) {
            v++;
            i++;
        }
    }
    a->length = i;

    a->flags |= GRIB_ACCESSOR_FLAG_READ_ONLY;
}

static void post_init(grib_accessor* a)
{
}

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

static size_t string_length(grib_accessor* a)
{
    return a->length;
}

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

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

static int unpack_string(grib_accessor* a, char* val, size_t* len)
{
    int i = 0;

    if (len[0] < (a->length + 1)) {
        grib_context_log(a->context, GRIB_LOG_ERROR, "unpack_string: Wrong size (%lu) for %s it contains %ld values",
                len[0], a->name, a->length + 1);
        len[0] = 0;
        return GRIB_ARRAY_TOO_SMALL;
    }

    for (i = 0; i < a->length; i++)
        val[i] = grib_handle_of_accessor(a)->buffer->data[a->offset + i];
    val[i] = 0;
    len[0] = i;
    return GRIB_SUCCESS;
}

static int pack_string(grib_accessor* a, const char* val, size_t* len)
{
    return GRIB_NOT_IMPLEMENTED;
}

static int pack_long(grib_accessor* a, const long* v, size_t* len)
{
    grib_context_log(a->context, GRIB_LOG_ERROR, " Should not pack %s as long", a->name);
    return GRIB_NOT_IMPLEMENTED;
}

static int pack_double(grib_accessor* a, const double* v, size_t* len)
{
    grib_context_log(a->context, GRIB_LOG_ERROR, " Should not pack %s  as double", a->name);
    return GRIB_NOT_IMPLEMENTED;
}

static int unpack_long(grib_accessor* a, long* v, size_t* len)
{
    char val[1024] = {0,};
    size_t l   = sizeof(val);
    size_t i   = 0;
    char* last = NULL;
    int err    = grib_unpack_string(a, val, &l);

    if (err)
        return err;

    i = 0;
    while (i < l - 1 && val[i] == ' ')
        i++;

    if (val[i] == 0) {
        *v = 0;
        return 0;
    }
    if (val[i + 1] == ' ' && i < l - 2)
        val[i + 1] = 0;

    *v = strtol(val, &last, 10);

    grib_context_log(a->context, GRIB_LOG_DEBUG, " Casting string %s to long", a->name);
    return GRIB_SUCCESS;
}

static int unpack_double(grib_accessor* a, double* v, size_t* len)
{
    char val[1024];
    size_t l   = sizeof(val);
    char* last = NULL;
    grib_unpack_string(a, val, &l);

    *v = strtod(val, &last);

    if (*last == 0) {
        grib_context_log(a->context, GRIB_LOG_DEBUG, " Casting string %s to long", a->name);
        return GRIB_SUCCESS;
    }

    return GRIB_NOT_IMPLEMENTED;
}

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

    size_t alen = 0;
    size_t blen = 0;
    long count  = 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 = (char*)grib_context_malloc(a->context, alen * sizeof(char));
    bval = (char*)grib_context_malloc(b->context, blen * sizeof(char));

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

    retval = GRIB_SUCCESS;
    if (strcmp(aval, bval))
        retval = GRIB_STRING_VALUE_MISMATCH;

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

    return retval;
}

static long next_offset(grib_accessor* a)
{
    return a->offset + a->length;
}
