/*
 * (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.
 */

/***************************************************************************
 *   Jean Baptiste Filippi - 01.11.2005                                                           *
 *   Enrico Fucile
 *                                                                         *
 ***************************************************************************/
#include "grib_api_internal.h"
/*
   This is used by make_class.pl

   START_CLASS_DEF
   CLASS      = action
   SUPER      = action_class_section
   IMPLEMENTS = create_accessor
   IMPLEMENTS = dump
   IMPLEMENTS = destroy
   IMPLEMENTS = reparse
   MEMBERS    = grib_expression *expression
   MEMBERS    = grib_action     *block_list
   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 "action.class" and rerun ./make_class.pl

*/

static void init_class(grib_action_class*);
static void dump(grib_action* d, FILE*, int);
static void destroy(grib_context*, grib_action*);
static int create_accessor(grib_section*, grib_action*, grib_loader*);
static grib_action* reparse(grib_action* a, grib_accessor* acc, int* doit);


typedef struct grib_action_list
{
    grib_action act;
    /* Members defined in section */
    /* Members defined in list */
    grib_expression* expression;
    grib_action* block_list;
} grib_action_list;

extern grib_action_class* grib_action_class_section;

static grib_action_class _grib_action_class_list = {
    &grib_action_class_section, /* super                     */
    "action_class_list",        /* name                      */
    sizeof(grib_action_list),   /* size                      */
    0,                          /* inited */
    &init_class,                /* init_class */
    0,                          /* init                      */
    &destroy,                   /* destroy */

    &dump, /* dump                      */
    0,     /* xref                      */

    &create_accessor, /* create_accessor*/

    0,        /* notify_change */
    &reparse, /* reparse */
    0,        /* execute */
};

grib_action_class* grib_action_class_list = &_grib_action_class_list;

static void init_class(grib_action_class* c)
{
    c->xref          = (*(c->super))->xref;
    c->notify_change = (*(c->super))->notify_change;
    c->execute       = (*(c->super))->execute;
}
/* END_CLASS_IMP */

static void dump(grib_action* act, FILE* f, int lvl)
{
    grib_action_list* a = (grib_action_list*)act;
    int i               = 0;
    for (i = 0; i < lvl; i++)
        grib_context_print(act->context, f, "     ");
    grib_context_print(act->context, f, "Loop   %s\n", act->name);
    grib_dump_action_branch(f, a->block_list, lvl + 1);
}

static int create_accessor(grib_section* p, grib_action* act, grib_loader* h)
{
    grib_action_list* a = (grib_action_list*)act;

    grib_accessor* ga = NULL;
    grib_section* gs  = NULL;
    grib_action* la   = NULL;
    grib_action* next = NULL;
    int ret           = 0;
    long val          = 0;

    if ((ret = grib_expression_evaluate_long(p->h, a->expression, &val)) != GRIB_SUCCESS) {
        grib_context_log(p->h->context, GRIB_LOG_DEBUG, " List %s creating %d values unable to evaluate long \n", act->name, val);
        return ret;
    }

    grib_context_log(p->h->context, GRIB_LOG_DEBUG, " List %s creating %d values \n", act->name, val);

    ga = grib_accessor_factory(p, act, 0, NULL);
    if (!ga)
        return GRIB_BUFFER_TOO_SMALL;
    gs       = ga->sub_section;
    ga->loop = val;

    grib_push_accessor(ga, p->block);

    la = a->block_list;

    gs->branch = la;
    grib_dependency_observe_expression(ga, a->expression);

    while (val--) {
        next = la;
        while (next) {
            ret = grib_create_accessor(gs, next, h);
            if (ret != GRIB_SUCCESS)
                return ret;
            next = next->next;
        }
    }
    return GRIB_SUCCESS;
}

grib_action* grib_action_create_list(grib_context* context, const char* name, grib_expression* expression, grib_action* block)
{
    grib_action_list* a;
    grib_action_class* c = grib_action_class_list;
    grib_action* act     = (grib_action*)grib_context_malloc_clear_persistent(context, c->size);
    act->cclass          = c;
    act->context         = context;
    a                    = (grib_action_list*)act;
    act->next            = NULL;
    act->name            = grib_context_strdup_persistent(context, name);
    act->op              = grib_context_strdup_persistent(context, "section");
    a->expression        = expression;

    a->block_list = block;

    grib_context_log(context, GRIB_LOG_DEBUG, " Action List %s is created  \n", act->name);
    return act;
}

static grib_action* reparse(grib_action* a, grib_accessor* acc, int* doit)
{
    grib_action_list* self = (grib_action_list*)a;

    int ret  = 0;
    long val = 0;

    if ((ret = grib_expression_evaluate_long(grib_handle_of_accessor(acc), self->expression, &val)) != GRIB_SUCCESS) {
        grib_context_log(acc->context, GRIB_LOG_ERROR, " List %s creating %d values unable to evaluate long \n", acc->name, val);
    }

    *doit = (val != acc->loop);

    return self->block_list;
}

static void destroy(grib_context* context, grib_action* act)
{
    grib_action_list* self = (grib_action_list*)act;
    grib_action* a         = self->block_list;

    while (a) {
        grib_action* na = a->next;
        grib_action_delete(context, a);
        a = na;
    }

    grib_context_free_persistent(context, act->name);
    grib_context_free_persistent(context, act->op);
    grib_expression_free(context, self->expression);
}
