extends SceneTree
## Verifica la colonna sonora in loop: nodo presente, stream OGG con loop attivo,
## volume da sottofondo, durata attesa e riproduzione avviata.
const EXPECTED_LENGTH := 57.6
const EXPECTED_VOLUME_DB := -11.0

func _initialize() -> void:
	call_deferred("run_test")

func run_test() -> void:
	var world = load("res://scenes/main.tscn").instantiate()
	root.add_child(world)
	world.start_game("Test", false) # come premere GIOCA, senza toccare il profilo salvato
	await process_frame
	var players := get_nodes_in_group("music")
	assert(players.size() == 1)
	var music: AudioStreamPlayer = players[0]
	assert(music.name == "Music")
	assert(music.stream is AudioStreamOggVorbis)
	assert(music.stream.loop)
	assert(absf(music.volume_db - EXPECTED_VOLUME_DB) < 0.001)
	var length: float = music.stream.get_length()
	assert(absf(length - EXPECTED_LENGTH) < 0.3)
	assert(music.playing)
	var first := music.get_playback_position()
	await create_timer(0.5).timeout
	assert(music.playing)
	var second := music.get_playback_position()
	print("PASS: Music loop=%s durata=%.2fs volume=%.1fdB posizione %.2f -> %.2f | driver audio: %s"
		% [music.stream.loop, length, music.volume_db, first, second, AudioServer.get_driver_name()])
	# La musica deve restare in riproduzione anche a giocatore morto.
	world.player.take_damage(9999)
	await create_timer(0.3).timeout
	assert(music.playing)
	print("PASS: musica attiva anche dopo la morte del giocatore")
	world.queue_free()
	await process_frame
	quit()