@tool
extends Function
class_name Movable

signal on_move(position: Vector3, rotation: Vector3)
signal on_moved()

@export var restricted: bool = false
@export var restrict_movement: Callable
@export var lock_rotation: bool = false
@export var disabled: bool = false
var hit_node := Node3D.new()
var initiator = null

func _on_grab_down(event: EventPointer):
	if disabled:
		return

	if restricted&&event.target != get_parent():
		return

	initiator = event.initiator

	if hit_node.get_parent() != null:
		hit_node.get_parent().remove_child(hit_node)

	initiator.node.add_child(hit_node)
	hit_node.global_transform = get_parent().global_transform

func _on_grab_move(event: EventPointer):
	if hit_node.get_parent() == null:
		return

	if event.initiator != initiator:
		return
	
	if restrict_movement:
		get_parent().global_position = restrict_movement.call(hit_node.global_position)
	else:
		get_parent().global_position = hit_node.global_position

	if !lock_rotation:
		get_parent().global_basis = hit_node.global_basis
		on_move.emit(get_parent().global_position, get_parent().global_rotation)
	else:
		on_move.emit(get_parent().global_position, Vector3(0, 0, 0))

func _on_grab_up(event: EventPointer):
	if event.initiator != initiator:
		return

	if hit_node.get_parent() == null:
		return

	initiator = null
	hit_node.get_parent().remove_child(hit_node)
	on_moved.emit()

func _get_configuration_warnings() -> PackedStringArray:
	var warnings := PackedStringArray()

	if get_parent() is StaticBody3D == false:
		warnings.append("Movable requires a StaticBody3D as parent.")

	return warnings