extends Node3D

const MOUSE_SENSITIVITY := .001
const MOUSE_VISCOSITY := 0.5

var _goal_rotation_y := rotation.y

func get_input_direction() -> Vector2:
	var input := Input.get_vector("move_left", "move_right", "move_up", "move_down")
	if input == Vector2.ZERO:
		return Vector2.ZERO
	var dir := input.normalized()
	
	input = input * dir.abs()
	return -1.0 * dir.rotated(-rotation.y + PI)

func _process(_delta):
	get_parent().movement_dir = get_input_direction()
	%SpringArm3D.look_at(global_position)
	
	var rot_y := lerp_angle(rotation.y, _goal_rotation_y, MOUSE_VISCOSITY)
	rotation.y = rot_y

func _ready():
	Input.mouse_mode = Input.MOUSE_MODE_CAPTURED

func handle_camera_movement(move: Vector2):
	if Input.mouse_mode != Input.MOUSE_MODE_CAPTURED:
		return
	move *= MOUSE_SENSITIVITY
	_goal_rotation_y -= move.x

func _input(event):
	if event is InputEventMouseMotion:
		handle_camera_movement(event.relative)