extends Node

# 游戏管理器 - 全局游戏状态管理
# 单例模式，管理游戏的整体状态和生命周期

signal game_state_changed(new_state: GameState)

enum GameState {
	LOADING,    # 加载中
	AUTH,       # 认证状态
	MAIN_MENU,  # 主菜单
	IN_GAME,    # 游戏中
	PAUSED,     # 暂停
	SETTINGS    # 设置
}

var current_state: GameState = GameState.LOADING
var previous_state: GameState = GameState.LOADING
var current_user: String = ""
var game_version: String = "1.0.0"

func _ready():
	print("GameManager 初始化完成")
	change_state(GameState.AUTH)

func change_state(new_state: GameState):
	if current_state == new_state:
		return
	
	previous_state = current_state
	current_state = new_state
	
	print("游戏状态变更: ", GameState.keys()[previous_state], " -> ", GameState.keys()[current_state])
	game_state_changed.emit(new_state)

func get_current_state() -> GameState:
	return current_state

func get_previous_state() -> GameState:
	return previous_state

func set_current_user(username: String):
	current_user = username
	print("当前用户设置为: ", username)

func get_current_user() -> String:
	return current_user

func is_user_logged_in() -> bool:
	return not current_user.is_empty()