/*
 * (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      = action
   SUPER      = action_class_section
   IMPLEMENTS = destroy
   IMPLEMENTS = xref   
   IMPLEMENTS = execute
   MEMBERS    = grib_arguments* args
   MEMBERS    = grib_case *Case
   MEMBERS    = grib_action *Default
   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 xref(grib_action* d, FILE* f, const char* path);
static void destroy(grib_context*, grib_action*);
static int execute(grib_action* a, grib_handle* h);


typedef struct grib_action_switch
{
    grib_action act;
    /* Members defined in section */
    /* Members defined in switch */
    grib_arguments* args;
    grib_case* Case;
    grib_action* Default;
} grib_action_switch;

extern grib_action_class* grib_action_class_section;

static grib_action_class _grib_action_class_switch = {
    &grib_action_class_section, /* super                     */
    "action_class_switch",      /* name                      */
    sizeof(grib_action_switch), /* size                      */
    0,                          /* inited */
    &init_class,                /* init_class */
    0,                          /* init                      */
    &destroy,                   /* destroy */

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

    0, /* create_accessor*/

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

grib_action_class* grib_action_class_switch = &_grib_action_class_switch;

static void init_class(grib_action_class* c)
{
    c->dump            = (*(c->super))->dump;
    c->create_accessor = (*(c->super))->create_accessor;
    c->notify_change   = (*(c->super))->notify_change;
    c->reparse         = (*(c->super))->reparse;
}
/* END_CLASS_IMP */

grib_action* grib_action_create_switch(grib_context* context,
                                       grib_arguments* args,
                                       grib_case* Case,
                                       grib_action* Default)
{
    char name[1024];
    grib_action_switch* a;
    grib_action_class* c = grib_action_class_switch;
    grib_action* act     = (grib_action*)grib_context_malloc_clear_persistent(context, c->size);
    act->op              = grib_context_strdup_persistent(context, "section");

    act->cclass  = c;
    a            = (grib_action_switch*)act;
    act->context = context;

    a->args    = args;
    a->Case    = Case;
    a->Default = Default;

    sprintf(name, "_switch%p", (void*)a);

    act->name = grib_context_strdup_persistent(context, name);

    return act;
}

grib_case* grib_case_new(grib_context* c, grib_arguments* values, grib_action* action)
{
    grib_case* Case = (grib_case*)grib_context_malloc_clear_persistent(c, sizeof(grib_case));

    Case->values = values;
    Case->action = action;

    return Case;
}

static int execute(grib_action* act, grib_handle* h)
{
    grib_action_switch* a = (grib_action_switch*)act;
    grib_case* c          = a->Case;
    grib_action* next     = a->Default;
    grib_arguments* args  = a->args;
    grib_arguments* values;
    grib_expression* e;
    grib_expression* value;
    int ret     = 0;
    long lres   = 0;
    double dres = 0;
    long lval   = 0;
    double dval = 0;
    int type    = 0;
    int ok      = 0;
    const char* cval;
    const char* cres;
    char buf[80];
    char tmp[80];
    size_t len  = sizeof(buf);
    size_t size = sizeof(tmp);
    int err     = 0;

    Assert(args);

    while (c) {
        e      = args->expression;
        values = c->values;
        value  = values->expression;
        ok     = 0;
        while (e && value) {
            if (!strcmp(value->cclass->name, "true"))
                ok = 1;
            else {
                type = grib_expression_native_type(h, value);

                switch (type) {
                    case GRIB_TYPE_LONG:
                        ok = (grib_expression_evaluate_long(h, value, &lres) == GRIB_SUCCESS) &&
                             (grib_expression_evaluate_long(h, e, &lval) == GRIB_SUCCESS) &&
                             (lval == lres);
                        break;

                    case GRIB_TYPE_DOUBLE:
                        ok = (grib_expression_evaluate_double(h, value, &dres) == GRIB_SUCCESS) &&
                             (grib_expression_evaluate_double(h, e, &dval) == GRIB_SUCCESS) &&
                             (dval == dres);
                        break;

                    case GRIB_TYPE_STRING:
                        len  = sizeof(buf);
                        size = sizeof(tmp);
                        ok   = ((cres = grib_expression_evaluate_string(h, e, buf, &len, &err)) != NULL) &&
                             (err == 0) && ((cval = grib_expression_evaluate_string(h, value, tmp, &size, &err)) != NULL) &&
                             (err == 0) && ((strcmp(buf, cval) == 0) || (strcmp(cval, "*") == 0));
                        break;

                    default:
                        /* TODO: */
                        break;
                }
            }
            if (!ok)
                break;

            args = args->next;
            if (args)
                e = args->expression;
            else
                e = NULL;

            values = values->next;
            if (values)
                value = values->expression;
            else
                value = NULL;
        }

        if (ok) {
            next = c->action;
            break;
        }

        c = c->next;
    }

    if (!next)
        return GRIB_SWITCH_NO_MATCH;

    while (next) {
        ret = grib_action_execute(next, h);
        if (ret != GRIB_SUCCESS)
            return ret;
        next = next->next;
    }

    return GRIB_SUCCESS;
}

static void destroy(grib_context* context, grib_action* act)
{
    grib_action_switch* a = (grib_action_switch*)act;
    grib_case* t          = a->Case;

    while (t) {
        grib_case* nt = t->next;
        grib_action_delete(context, t->action);
        grib_arguments_free(context, t->values);
        grib_context_free(context, t);
        t = nt;
    }

    grib_action_delete(context, a->Default);

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

static void xref(grib_action* d, FILE* f, const char* path)
{
}
