extends RigidBody2D


@export var drag_spring: float = 100.0


var held: bool = false

var _drag_point: Vector2 = Vector2.ZERO


func _init() -> void:
	freeze_mode = FREEZE_MODE_KINEMATIC
	input_pickable = true
	input_event.connect(_on_input_event)


func _physics_process(delta: float) -> void:
	if held:
		global_position = get_global_mouse_position() - (to_global(_drag_point) - global_position)


func _on_input_event(viewport: Node, event: InputEvent, shape_idx: int) -> void:
	if event is InputEventMouseButton:
		if event.pressed and event.button_index == MOUSE_BUTTON_LEFT:
			_start_drag()
		if not event.pressed and event.button_index == MOUSE_BUTTON_LEFT:
			_end_drag()


func _start_drag() -> void:
	held = true
	freeze = true
	_drag_point = get_local_mouse_position()


func _end_drag() -> void:
	held = false
	freeze = false
	apply_central_impulse(Input.get_last_mouse_velocity())