extends RefCounted
class_name MultiAwait

var waiting_count: int = 0
var finished: bool = false

signal done(timed_out: bool)

func _init(signals: Array[Signal], timeout: float) -> void:
	for sig in signals:
		var err: int = sig.connect(receive_signal, CONNECT_ONE_SHOT)
		if err == Error.OK:
			waiting_count += 1
	check_done()
	var scene_tree: SceneTree = Engine.get_main_loop() as SceneTree
	if scene_tree != null:
		scene_tree.create_timer(timeout).timeout.connect(finish.bind(true))
	print("MultiAwait: waiting for %d signals or %f seconds" % [waiting_count,timeout])
	
func receive_signal() -> void:
	waiting_count -= 1
	print("MultiAwait: got signal, %d signals left" % [waiting_count])
	check_done()
	
func check_done() -> void:
	if waiting_count <= 0:
		finish(false)
		
func finish(timed_out: bool) -> void:
	if !finished:
		print("MultiAwait: done, timed_out: %s" % [timed_out])
		done.emit(timed_out)
		finished = true