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

signal room_changed(floor_index: int, room_index: int)

const FLOOR_HEIGHT: float = 720.0
const ROOM_WIDTH: float = 1280.0
const CAMERA_TWEEN_DURATION: float = 0.6

var _current_floor: int = 0
var _current_room: int = 0
var _camera: Camera2D
var _is_at_home: bool = false
var _last_hospital_floor: int = 0
var _last_hospital_room: int = 0


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


func go_to_floor(floor_index: int) -> void:
	go_to_room(floor_index, 0)


func go_to_room(floor_index: int, room_index: int) -> void:
	_go_to_room_internal(floor_index, room_index, true)


func _go_to_room_internal(floor_index: int, room_index: int, clear_home_flag: bool) -> void:
	if clear_home_flag:
		_is_at_home = false
	if _camera == null:
		return
	if floor_index == _current_floor and room_index == _current_room:
		return
	_current_floor = floor_index
	_current_room = room_index
	var target_x: float = room_index * ROOM_WIDTH + ROOM_WIDTH * 0.5
	var target_y: float = floor_index * -FLOOR_HEIGHT + FLOOR_HEIGHT * 0.5
	var tween: Tween = create_tween()
	tween.set_ease(Tween.EASE_IN_OUT)
	tween.set_trans(Tween.TRANS_SINE)
	tween.tween_property(_camera, "position", Vector2(target_x, target_y), CAMERA_TWEEN_DURATION)
	tween.finished.connect(func() -> void: room_changed.emit(floor_index, room_index))


func get_current_floor() -> int:
	return _current_floor


func get_current_room() -> int:
	return _current_room


func is_at_home() -> bool:
	return _is_at_home


func go_to_home() -> void:
	if _is_at_home:
		return
	_last_hospital_floor = _current_floor
	_last_hospital_room = _current_room
	_is_at_home = true
	_go_to_room_internal(0, 0, false)


func go_to_hospital() -> void:
	if not _is_at_home:
		return
	_is_at_home = false
	go_to_room(_last_hospital_floor, _last_hospital_room)