extends Node


var current_background: AudioStreamPlayer


func play_sound(sound_name: String):
	var sound = get_node(sound_name) as AudioStreamPlayer
	sound.play()


func play_background(sound_name: String):
	var sound = get_node(sound_name) as AudioStreamPlayer
	
	if sound != current_background:
		if current_background:
			current_background.stop()
		
		current_background = sound
		sound.play()
	
	# sound == current_background
	elif not current_background.playing:
		current_background.play()
	
	#current_background.stop()


func fade_out(sound: AudioStreamPlayer):
	var previous_volume = sound.volume_db
	
	var tween = get_tree().create_tween()
	tween.tween_property(sound, "volume_db", -80, 1.0).set_ease(Tween.EASE_OUT)
	
	# reset volume
	tween.finished.connect(func():
		sound.stop()
		sound.volume_db = previous_volume
	)
	
	return tween