extends Sprite

export(float) var speed = 10.0
export(int) var tileSize = 32

func _process(delta):
    var dir = get_input_dir()
    if dir != Vector2():
        $Tween.interpolate_property(self, "position", position, position + dir * tileSize, 1.0 / speed, Tween.TRANS_LINEAR, Tween.EASE_IN_OUT)
        $Tween.start()

func _on_Tween_tween_started(object, key):
    set_process(false)

func _on_Tween_tween_completed(object, key):
    set_process(true)

func get_input_dir():
    var dir = Vector2()

    dir.y = (int(Input.is_action_pressed("ui_down")) - int(Input.is_action_pressed("ui_up")))
    if dir.y == 0:
        dir.x = (int(Input.is_action_pressed("ui_right")) - int(Input.is_action_pressed("ui_left")))

    return dir