#include "world.h"

object_t g_objects[WORLD_NUM_OBJECTS];

void world_clear() {
	for(int i = 0; i < WORLD_NUM_OBJECTS; ++i) {
		g_objects[i].active = 0;
		g_objects[i].enabled = 0;
	}
}

void object_draw_sprite(object_t* object) {
	draw_sprite(&object->sprite);
}

object_t* _find_free_object() {
	for(int i = 0; i < WORLD_NUM_OBJECTS; ++i) {
		if(g_objects[i].active == 0) {
			return g_objects + i;
		}
	}
	return NULL;
}

object_t* make_object() {
	object_t* o = _find_free_object();
	o->active = 1;
	o->enabled = 1;
	o->evt_draw = &object_draw_sprite;
	o->evt_update = NULL;
	memset(&o->sprite, 0, sizeof(sprite_t));
	return o;
}

object_t* instantiate_object(const object_t *original) {
	object_t* obj = make_object();
	*obj = *original;
	obj->active = 1;
	return obj;
}

void update_objects() {
	for(int i = 0; i < WORLD_NUM_OBJECTS; ++i) {
		if(g_objects[i].active == 1
		&& g_objects[i].enabled == 1
		&& g_objects[i].evt_update != NULL) {
			g_objects[i].evt_update(g_objects + i);
		}
	}
}

void draw_objects() {
	for(int i = 0; i < WORLD_NUM_OBJECTS; ++i) {
		if(g_objects[i].active == 1
		&& g_objects[i].enabled == 1
		&& g_objects[i].evt_draw != NULL) {
			g_objects[i].evt_draw(g_objects + i);
		}
	}
}