class_name RotationComponent
extends CharacterComponent

@export var root: Node3D
@export var rotation_speed: float = 15.0

var direction: Vector3
var angle: float

func _ready():
	assert(root, "rotation root needs to be set")
	assert(rotation_speed > 0, "rotation speed must be greater than zero")
	character.controlled.connect(on_controlled)

func _process(delta):
	if absf(angle_difference(root.rotation.y, angle)) < 0.001:
		return
	
	root.rotation.y = Math.damp_angle(root.rotation.y, angle, rotation_speed * delta)

func on_controlled(controller: Controller):
	controller.direction_changed.connect(on_direction_changed)

func on_direction_changed(new_direction: Vector3):
	direction = new_direction

	if direction != Vector3.ZERO:
		angle = atan2(direction.x, direction.z)