extends Node3D

var velocity: float = 0.0

var rings_count = 72727
var finished_rings_count = 0
var rings: Array[Node] = []

var stream_players: Array[AudioStreamPlayer] = []

func _ready() -> void:
	var music_node = get_node("Music")
	assert(is_instance_valid(music_node), self.name + " has no music!")
	var music = music_node.get_children()
	for music_player in music:
		if music_player is AudioStreamPlayer:
			stream_players.push_back(music_player)
	
	var rings_node = get_node("Rings")
	assert(is_instance_valid(rings_node), self.name + " has no rings!")
	rings = rings_node.get_children()
	rings_count = len(rings)
	for ring in rings:
		ring.connect("collect_signal", do_we_end_yet)

func do_we_end_yet():
	finished_rings_count += 1
	if finished_rings_count >= rings_count:
		var game = get_parent().get_parent()
		if is_instance_valid(game) and game.has_method("stop_level"):
			game.stop_level()

func _process(delta: float) -> void:
	var sphere = $Player/Sphere
	velocity = abs(sphere.linear_velocity.x) + abs(sphere.linear_velocity.y)
	var instruments_needed = floor(velocity / 8)
	var instruments_playing = stream_players.filter(func(p: AudioStreamPlayer): return p.volume_db > -50)
	
	for index_p in len(instruments_playing):
		var playing = instruments_playing[index_p]
		if index_p + 1 > instruments_needed:
			playing.volume_db = max(playing.volume_db - (delta * 32), -50)
		elif playing.volume_db <= 0:
			playing.volume_db = min(playing.volume_db + (delta * 8), 0)
	
	if instruments_needed > len(instruments_playing):
		var instruments_not_playing = stream_players.filter(func(p: AudioStreamPlayer): return p.volume_db <= -50)
		if len(instruments_not_playing):
			var to_play = instruments_not_playing.pick_random()
			if is_instance_valid(to_play):
				to_play.volume_db = min(to_play.volume_db + (delta * 16), 0)