class_name WindSound extends Node

@onready var fastPlayer: AudioStreamPlayer = $Fast
@onready var slowPlayer: AudioStreamPlayer = $Slow

@export var slowSound: AudioStream
@export var fastSound: AudioStream
@export var fullFast: float = 250
@export var fullSlow: float = 100

func _ready() -> void:
	fastPlayer.stream = fastSound
	slowPlayer.stream = slowSound
	fastPlayer.play()
	slowPlayer.play()

# Called every frame. 'delta' is the elapsed time since the previous frame.
func _physics_process(delta: float) -> void:
	if (City.moving && is_instance_valid(Sleigh.instance)):
		if (Sleigh.instance.speed < fullSlow):
			fastPlayer.volume_db = -80
			slowPlayer.volume_db = 0
		elif (Sleigh.instance.speed > fullFast):
			fastPlayer.volume_db = 0
			slowPlayer.volume_db = -80
		else:
			var ratio: float = lerpf(0, 1, (Sleigh.instance.speed - fullSlow) / (fullFast - fullSlow))
			fastPlayer.volume_db = linear_to_db(ratio)
			slowPlayer.volume_db = linear_to_db(1 - ratio)
	else:
		fastPlayer.volume_db = -80
		slowPlayer.volume_db = -10

func _on_slow_finished() -> void:
	slowPlayer.play()

func _on_fast_finished() -> void:
	fastPlayer.play()