extends CharacterBody3D


const SPEED = 5.0
const CAMERA_ROTATE_RATE = PI / 12


# rotate camera
func _unhandled_input(event: InputEvent) -> void:
	if event.is_action("camera-rotate-left"):
		$cameraPivot.rotate_y(CAMERA_ROTATE_RATE)
	elif event.is_action("camera-rotate-right"):
		$cameraPivot.rotate_y(-CAMERA_ROTATE_RATE)


func _physics_process(delta: float) -> void:
	# Add the gravity.
	if not is_on_floor():
		velocity += get_gravity() * delta

	# Get the input direction and handle the movement/deceleration.
	var input_dir := Input.get_vector("player-turn-left", "player-turn-right", "player-forward", "player-backward")
	var direction := (transform.basis * Vector3(input_dir.x, 0, input_dir.y)).normalized()
	direction = direction.rotated(Vector3.UP, $cameraPivot.rotation.y)
	
	if direction:
		velocity.x = direction.x * SPEED
		velocity.z = direction.z * SPEED
		
		# rotate the character to face movement direction
		$player.rotation.y = lerp_angle($player.rotation.y, atan2(-velocity.x, -velocity.z), 0.15)
	else:
		velocity.x = move_toward(velocity.x, 0, SPEED)
		velocity.z = move_toward(velocity.z, 0, SPEED)

	move_and_slide()