extends Node
class_name GameStateManager
## 游戏状态管理器
## 负责管理游戏的全局状态和场景切换

# 游戏状态枚举
enum GameState {
	LOGIN,              # 登录状态
	CHARACTER_CREATION, # 角色创建状态
	IN_GAME,           # 游戏中
	DISCONNECTED       # 断线状态
}

# 信号定义
signal state_changed(old_state: GameState, new_state: GameState)

# 当前状态
var current_state: GameState = GameState.LOGIN

# 玩家数据
var player_data: Dictionary = {}

# 数据文件路径
const SAVE_PATH = "user://player_data.json"

func _ready():
	print("GameStateManager initialized")
	print("Initial state: ", GameState.keys()[current_state])
	
	# 尝试加载玩家数据
	load_player_data()

func change_state(new_state: GameState) -> void:
	"""切换游戏状态"""
	if new_state == current_state:
		return
	
	var old_state = current_state
	current_state = new_state
	
	print("State changed: ", GameState.keys()[old_state], " -> ", GameState.keys()[new_state])
	state_changed.emit(old_state, new_state)

func save_player_data() -> void:
	"""保存玩家数据到本地"""
	var file = FileAccess.open(SAVE_PATH, FileAccess.WRITE)
	if file:
		var json_string = JSON.stringify(player_data)
		file.store_string(json_string)
		file.close()
		print("Player data saved")
	else:
		print("Failed to save player data")

func load_player_data() -> Dictionary:
	"""从本地加载玩家数据"""
	if not FileAccess.file_exists(SAVE_PATH):
		print("No saved player data found")
		return {}
	
	var file = FileAccess.open(SAVE_PATH, FileAccess.READ)
	if file:
		var json_string = file.get_as_text()
		file.close()
		
		var json = JSON.new()
		var parse_result = json.parse(json_string)
		
		if parse_result == OK:
			player_data = json.data
			print("Player data loaded: ", player_data.keys())
			return player_data
		else:
			print("Failed to parse player data")
	else:
		print("Failed to open player data file")
	
	return {}

func clear_player_data() -> void:
	"""清除玩家数据"""
	player_data.clear()
	if FileAccess.file_exists(SAVE_PATH):
		DirAccess.remove_absolute(SAVE_PATH)
	print("Player data cleared")