class_name Spawner extends DeferredSpawnGroup

var limit: int = 32
var timeout: float = -1.0

var _spawned: Array[Node] = []
var _timer: float = -1.0

func spawn() -> void:
	if _spawned.size() > limit:
		despawn()
	var what := root.duplicate()
	_spawned.push_back(what)
	add_child(what)
	spawned.emit(what)

func despawn() -> void:
	if not _spawned.is_empty():
		var what = _spawned[0]
		remove_child(what)
		what.queue_free()
		_spawned.remove_at(0)
		despawned.emit(what)

func _physics_process(delta: float) -> void:
	if timeout > 0.0:
		if _timer <= 0.0:
			spawn()
			_timer = timeout
		_timer -= delta

func is_spawned() -> bool:
	return not _spawned.is_empty()

func count() -> int:
	return _spawned.size()

func dissolve() -> void:
	for what in _spawned:
		what.reparent(get_parent())
	queue_free()