#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "Aw.h"

/**
 * Creates and initializes a zone object.
 *
 * The initialized structure must be manually destroyed using free().
 * The remaining fields of the zone are to be set by yourself.
 *
 * The value NULL may be specified for one or more strings to indicate
 * that string is not to be used.
 *
 * @param footstep String specifying footstep sound.
 * @param ambient String specifying ambient sound.
 * @param camera String specifying camera object to use.
 * @return An initialized aw_object_data_zone structure.
 */
aw_object_data_zone* new_zone(const char* footstep, const char* ambient, const char* camera)
{
	size_t flen = (footstep == NULL)? 0 : strlen(footstep);
	size_t alen = (ambient == NULL)? 0 : strlen(ambient);
	size_t clen = (camera == NULL)? 0 : strlen(camera);
	size_t psiz = flen + alen + clen + sizeof(aw_object_data_zone);
	aw_object_data_zone* zone = NULL;

	zone = (aw_object_data_zone*)malloc(psiz);
	memset(zone, 0, psiz);

	zone->footstep_len = (unsigned short)(flen);
	zone->ambient_len = (unsigned short)(alen);
	zone->camera_len = (unsigned char)(clen);

	if (flen != 0)
		memcpy(zone->str_data, footstep, flen);

	if (alen != 0)
		memcpy(zone->str_data + flen, ambient, alen);

	if (clen != 0)
		memcpy(zone->str_data + flen + alen, camera, clen);

	return zone;
}

/**
 * Prepares an initialized zone structure to be built in the world.
 *
 * After calling this function use either the aw_object_add or
 * aw_object_load SDK methods after setting additional attributes
 * defining the zone location, etc.
 *
 * @param zone The zone to be built.
 */
void prepare_zone(const aw_object_data_zone* zone)
{
	unsigned int psiz = 0;

	psiz = sizeof(aw_object_data_zone);
	psiz += zone->footstep_len;
	psiz += zone->ambient_len;
	psiz += zone->camera_len;

	aw_string_set(AW_OBJECT_DESCRIPTION, "");
	aw_string_set(AW_OBJECT_ACTION, "");
	aw_int_set(AW_OBJECT_TYPE, AW_OBJECT_TYPE_ZONE);
	aw_data_set(AW_OBJECT_DATA, (char*)(zone), psiz);
}