## Cake — tap to cut a slice, slice auto-respawns after a delay.
class_name Cake extends Node2D

enum State { WHOLE, CUTTING, CUT, RESETTING }

const CUT_DURATION: float = 0.3
const RESET_DURATION: float = 0.3
const RESET_DELAY: float = 3.0
const BUTTON_HALF_WIDTH: float = 40.0
const BUTTON_HALF_HEIGHT: float = 20.0

var _state: State = State.WHOLE


func _input(event: InputEvent) -> void:
	if _state != State.WHOLE:
		return
	if not event is InputEventScreenTouch:
		return
	var touch: InputEventScreenTouch = event as InputEventScreenTouch
	if not touch.pressed:
		return
	var local: Vector2 = to_local(touch.position)
	if abs(local.x) > BUTTON_HALF_WIDTH or abs(local.y) > BUTTON_HALF_HEIGHT:
		return
	_start_cutting()


func _start_cutting() -> void:
	AudioManager.play_sfx("object_tap")
	_state = State.CUTTING
	var slice: Node2D = get_node_or_null("Slice") as Node2D
	var tween: Tween = create_tween()
	if slice != null:
		tween.tween_property(slice, "modulate:a", 0.0, CUT_DURATION)
	tween.tween_callback(_on_cut_complete)


func _on_cut_complete() -> void:
	_state = State.CUT
	var tween: Tween = create_tween()
	tween.tween_interval(RESET_DELAY)
	tween.tween_callback(_start_reset)


func _start_reset() -> void:
	_state = State.RESETTING
	var slice: Node2D = get_node_or_null("Slice") as Node2D
	var tween: Tween = create_tween()
	if slice != null:
		tween.tween_property(slice, "modulate:a", 1.0, RESET_DURATION)
	tween.tween_callback(_on_reset_complete)


func _on_reset_complete() -> void:
	_state = State.WHOLE