extends Node2D

@export var offset: Vector2 = Vector2(0, 0)
@export var travel_time: float = 2.0

@export_enum("Linear", "Sine", "Quint", "Quart", "Quad", "Expo", "Elastic", "Cubic", "Circ", "Bounce", "Back")
var transition_index: int = 0

@export_enum("Ease In", "Ease Out", "Ease In Out", "Ease Out In")
var ease_index: int = 0

var base_position: Vector2

func _ready() -> void:
	# Store the position you set in the editor as the "start" point.
	base_position = position
	_start_tween_out()

func _start_tween_out() -> void:

	var tween = create_tween()
	# Move from base_position to base_position + offset
	var track = tween.tween_property(self, "position", base_position + offset, travel_time)
	track.set_trans(_get_transition_constant(transition_index))
	track.set_ease(_get_ease_constant(ease_index))
	tween.tween_callback(Callable(self, "_start_tween_back"))

func _start_tween_back() -> void:
	var tween = create_tween()
	# Move from base_position + offset back to base_position
	var track = tween.tween_property(self, "position", base_position, travel_time)
	track.set_trans(_get_transition_constant(transition_index))
	track.set_ease(_get_ease_constant(ease_index))
	tween.tween_callback(Callable(self, "_start_tween_out"))

func _get_transition_constant(index: int) -> int:
	match index:
		0:  return Tween.TRANS_LINEAR
		1:  return Tween.TRANS_SINE
		2:  return Tween.TRANS_QUINT
		3:  return Tween.TRANS_QUART
		4:  return Tween.TRANS_QUAD
		5:  return Tween.TRANS_EXPO
		6:  return Tween.TRANS_ELASTIC
		7:  return Tween.TRANS_CUBIC
		8:  return Tween.TRANS_CIRC
		9:  return Tween.TRANS_BOUNCE
		10: return Tween.TRANS_BACK
	return Tween.TRANS_LINEAR  # Fallback

func _get_ease_constant(index: int) -> int:
	match index:
		0: return Tween.EASE_IN
		1: return Tween.EASE_OUT
		2: return Tween.EASE_IN_OUT
		3: return Tween.EASE_OUT_IN
	return Tween.EASE_IN  # Fallback