/*
 * 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.
 */

/***************************************************************************
 *   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 */
    0,                            /* compile */
};

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;
	c->compile	=	(*(c->super))->compile;
}
/* 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)
{
}


