extends Control
class_name ChatBubble
## 对话气泡
## 在角色上方显示短暂的对话消息

# UI 元素
var background: Panel
var label: Label
var timer: Timer

# 配置
var bubble_padding: Vector2 = Vector2(10, 5)
var max_width: float = 200.0
var default_duration: float = 3.0

func _ready():
	"""初始化对话气泡"""
	_create_ui()

## 创建 UI 元素
func _create_ui():
	"""创建气泡的所有 UI 元素"""
	# 设置为不阻挡输入
	mouse_filter = Control.MOUSE_FILTER_IGNORE
	
	# 创建背景面板
	background = Panel.new()
	background.mouse_filter = Control.MOUSE_FILTER_IGNORE
	add_child(background)
	
	# 创建文本标签
	label = Label.new()
	label.autowrap_mode = TextServer.AUTOWRAP_WORD_SMART
	label.horizontal_alignment = HORIZONTAL_ALIGNMENT_CENTER
	label.vertical_alignment = VERTICAL_ALIGNMENT_CENTER
	label.add_theme_font_size_override("font_size", 14)
	label.add_theme_color_override("font_color", Color(0, 0, 0))
	background.add_child(label)
	
	# 创建计时器
	timer = Timer.new()
	timer.one_shot = true
	timer.timeout.connect(_on_timer_timeout)
	add_child(timer)

## 显示气泡
func show_bubble(message: String, duration: float = 0.0) -> void:
	"""
	显示对话气泡
	@param message: 消息内容
	@param duration: 显示时长（秒），0 表示使用默认时长
	"""
	if duration <= 0:
		duration = default_duration
	
	# 设置文本
	label.text = message
	
	# 计算大小
	var text_size = label.get_combined_minimum_size()
	text_size.x = min(text_size.x, max_width)
	
	# 设置标签大小
	label.custom_minimum_size = text_size
	label.size = text_size
	
	# 设置背景大小
	var panel_size = text_size + bubble_padding * 2
	background.custom_minimum_size = panel_size
	background.size = panel_size
	
	# 设置标签位置（居中）
	label.position = bubble_padding
	
	# 设置整体大小
	custom_minimum_size = panel_size
	size = panel_size
	
	# 显示气泡
	show()
	modulate = Color(1, 1, 1, 1)
	
	# 启动计时器
	timer.start(duration)
	
	# 淡入动画
	var tween = create_tween()
	tween.tween_property(self, "modulate:a", 1.0, 0.2)

## 隐藏气泡
func hide_bubble() -> void:
	"""隐藏对话气泡（带淡出动画）"""
	var tween = create_tween()
	tween.tween_property(self, "modulate:a", 0.0, 0.3)
	tween.finished.connect(func(): hide())

## 计时器超时
func _on_timer_timeout():
	"""计时器超时，隐藏气泡"""
	hide_bubble()

## 设置气泡位置（相对于角色）
func set_bubble_position(character_position: Vector2, offset: Vector2 = Vector2(0, -40)):
	"""
	设置气泡位置
	@param character_position: 角色位置
	@param offset: 偏移量（默认在角色上方）
	"""
	global_position = character_position + offset - size / 2