extends Control
class_name HUD
## 游戏内 HUD
## 显示在线玩家数量、网络状态等信息

# UI 元素
var online_players_label: Label
var network_status_indicator: ColorRect
var network_status_label: Label
var interaction_hint: Label
var container: VBoxContainer

# 状态
var online_player_count: int = 0
var network_connected: bool = false

func _ready():
	"""初始化 HUD"""
	_create_ui()
	update_layout()

## 创建 UI 元素
func _create_ui():
	"""创建 HUD 的所有 UI 元素"""
	# 设置为全屏但不阻挡输入
	anchor_right = 1.0
	anchor_bottom = 1.0
	mouse_filter = Control.MOUSE_FILTER_IGNORE
	
	# 创建顶部容器
	var top_container = HBoxContainer.new()
	top_container.name = "TopContainer"
	top_container.position = Vector2(10, 10)
	add_child(top_container)
	
	# 网络状态指示器
	network_status_indicator = ColorRect.new()
	network_status_indicator.custom_minimum_size = Vector2(16, 16)
	network_status_indicator.color = Color(1, 0, 0, 0.8)  # 红色 - 断开
	top_container.add_child(network_status_indicator)
	
	# 间距
	top_container.add_child(_create_spacer(10))
	
	# 网络状态标签
	network_status_label = Label.new()
	network_status_label.text = "未连接"
	top_container.add_child(network_status_label)
	
	# 间距
	top_container.add_child(_create_spacer(20))
	
	# 在线玩家数量标签
	online_players_label = Label.new()
	online_players_label.text = "在线玩家: 0"
	top_container.add_child(online_players_label)
	
	# 创建底部容器（交互提示）
	var bottom_container = VBoxContainer.new()
	bottom_container.name = "BottomContainer"
	bottom_container.anchor_top = 1.0
	bottom_container.anchor_bottom = 1.0
	bottom_container.offset_top = -100
	bottom_container.offset_left = 10
	add_child(bottom_container)
	
	# 交互提示
	interaction_hint = Label.new()
	interaction_hint.text = ""
	interaction_hint.add_theme_font_size_override("font_size", 18)
	interaction_hint.add_theme_color_override("font_color", Color(1, 1, 0.5))
	bottom_container.add_child(interaction_hint)

## 创建间距
func _create_spacer(width: float) -> Control:
	"""创建水平间距"""
	var spacer = Control.new()
	spacer.custom_minimum_size = Vector2(width, 0)
	return spacer

## 更新布局
func update_layout():
	"""更新布局以适应窗口大小"""
	# HUD 元素使用锚点，会自动适应
	pass

## 更新在线玩家数量
func update_online_players(count: int):
	"""
	更新在线玩家数量显示
	@param count: 在线玩家数量
	"""
	online_player_count = count
	if online_players_label:
		online_players_label.text = "在线玩家: %d" % count

## 更新网络状态
func update_network_status(connected: bool):
	"""
	更新网络连接状态
	@param connected: 是否已连接
	"""
	network_connected = connected
	
	if network_status_indicator:
		if connected:
			network_status_indicator.color = Color(0.2, 1, 0.2, 0.8)  # 绿色 - 已连接
		else:
			network_status_indicator.color = Color(1, 0, 0, 0.8)  # 红色 - 断开
	
	if network_status_label:
		network_status_label.text = "已连接" if connected else "未连接"

## 显示交互提示
func show_interaction_hint(hint_text: String):
	"""
	显示交互提示
	@param hint_text: 提示文本
	"""
	if interaction_hint:
		interaction_hint.text = hint_text
		interaction_hint.show()

## 隐藏交互提示
func hide_interaction_hint():
	"""隐藏交互提示"""
	if interaction_hint:
		interaction_hint.text = ""
		interaction_hint.hide()