class_name FootstepController extends Node3D

const BASE_VOLUME := -42.0
const MUTE_VELOCITY := 1.0
const VELOCITY_FACTOR := 2.0

var _on_right_foot := false

@onready var player: Player = owner

@onready var left_foot: FootController = %LeftFoot
@onready var right_foot: FootController = %RightFoot


func play_footstep() -> void:
	var foot := right_foot if _on_right_foot else left_foot

	var relative_speed := player.velocity.length() - MUTE_VELOCITY
	if relative_speed < 0:
		return

	# TODO: detect surface material
	var sfx := foot.get_player_for_material(FootController.SurfaceMaterial.METAL)
	sfx.volume_db = BASE_VOLUME + relative_speed * VELOCITY_FACTOR
	sfx.play()

	_on_right_foot = not _on_right_foot