## RoomNavigator — autoload that moves the Camera2D smoothly between hospital floors.
extends Node

signal room_changed(floor_index: int)

const FLOOR_HEIGHT: float = 720.0
const CAMERA_TWEEN_DURATION: float = 0.6

var _current_floor: int = 0
var _camera: Camera2D


func initialize(camera: Camera2D) -> void:
	_camera = camera


func go_to_floor(floor_index: int) -> void:
	if _camera == null or floor_index == _current_floor:
		return
	_current_floor = floor_index
	var target_y: float = floor_index * -FLOOR_HEIGHT
	var tween: Tween = _camera.create_tween()
	tween.set_ease(Tween.EASE_IN_OUT)
	tween.set_trans(Tween.TRANS_SINE)
	tween.tween_property(_camera, "position:y", target_y, CAMERA_TWEEN_DURATION)
	room_changed.emit(floor_index)


func get_current_floor() -> int:
	return _current_floor