extends Node
## 统一错误处理类
## 提供项目中统一的错误处理和日志记录功能

# 错误级别枚举
enum ErrorLevel {
	INFO,
	WARNING,
	ERROR,
	CRITICAL
}

# 错误类别
enum ErrorCategory {
	NETWORK,
	GAME_LOGIC,
	UI,
	DATA,
	SYSTEM
}

# 错误处理器实例（单例模式）
static var instance: ErrorHandler = null

# 错误日志
var error_log: Array[Dictionary] = []
var max_log_entries: int = 1000

func _init():
	"""初始化错误处理器"""
	if instance == null:
		instance = self

## 获取错误处理器实例
static func get_instance() -> ErrorHandler:
	"""获取错误处理器单例实例"""
	if instance == null:
		instance = ErrorHandler.new()
	return instance

## 记录错误
static func log_error(
	message: String, 
	level: ErrorLevel = ErrorLevel.ERROR, 
	category: ErrorCategory = ErrorCategory.SYSTEM,
	details: Dictionary = {}
) -> void:
	"""
	记录错误信息
	@param message: 错误消息
	@param level: 错误级别
	@param category: 错误类别
	@param details: 错误详细信息
	"""
	var handler = get_instance()
	var error_entry = {
		"timestamp": Time.get_unix_time_from_system(),
		"level": level,
		"category": category,
		"message": message,
		"details": details
	}
	
	# 添加到日志
	handler.error_log.append(error_entry)
	
	# 限制日志大小
	if handler.error_log.size() > handler.max_log_entries:
		handler.error_log.pop_front()
	
	# 输出到控制台
	_print_error(error_entry)

## 打印错误到控制台
static func _print_error(error_entry: Dictionary) -> void:
	"""将错误打印到控制台"""
	var level_str = ErrorLevel.keys()[error_entry.level]
	var category_str = ErrorCategory.keys()[error_entry.category]
	var timestamp_str = preload("res://scripts/Utils.gd").format_timestamp(error_entry.timestamp)
	
	var log_message = "[%s] [%s] [%s] %s" % [
		timestamp_str,
		level_str,
		category_str,
		error_entry.message
	]
	
	# 根据错误级别选择输出方式
	match error_entry.level:
		ErrorLevel.INFO:
			print(log_message)
		ErrorLevel.WARNING:
			print_rich("[color=yellow]%s[/color]" % log_message)
		ErrorLevel.ERROR:
			print_rich("[color=red]%s[/color]" % log_message)
		ErrorLevel.CRITICAL:
			print_rich("[color=purple]%s[/color]" % log_message)
			push_error(error_entry.message)

## 记录网络错误
static func log_network_error(message: String, details: Dictionary = {}) -> void:
	"""记录网络相关错误"""
	log_error(message, ErrorLevel.ERROR, ErrorCategory.NETWORK, details)

## 记录网络警告
static func log_network_warning(message: String, details: Dictionary = {}) -> void:
	"""记录网络相关警告"""
	log_error(message, ErrorLevel.WARNING, ErrorCategory.NETWORK, details)

## 记录游戏逻辑错误
static func log_game_error(message: String, details: Dictionary = {}) -> void:
	"""记录游戏逻辑错误"""
	log_error(message, ErrorLevel.ERROR, ErrorCategory.GAME_LOGIC, details)

## 记录UI错误
static func log_ui_error(message: String, details: Dictionary = {}) -> void:
	"""记录UI相关错误"""
	log_error(message, ErrorLevel.ERROR, ErrorCategory.UI, details)

## 记录数据错误
static func log_data_error(message: String, details: Dictionary = {}) -> void:
	"""记录数据相关错误"""
	log_error(message, ErrorLevel.ERROR, ErrorCategory.DATA, details)

## 记录信息
static func log_info(message: String, category: ErrorCategory = ErrorCategory.SYSTEM, details: Dictionary = {}) -> void:
	"""记录信息级别的日志"""
	log_error(message, ErrorLevel.INFO, category, details)

## 获取错误日志
static func get_error_log() -> Array[Dictionary]:
	"""获取所有错误日志"""
	return get_instance().error_log

## 获取特定级别的错误
static func get_errors_by_level(level: ErrorLevel) -> Array[Dictionary]:
	"""
	获取特定级别的错误
	@param level: 错误级别
	@return: 错误列表
	"""
	var handler = get_instance()
	var filtered_errors: Array[Dictionary] = []
	
	for error in handler.error_log:
		if error.level == level:
			filtered_errors.append(error)
	
	return filtered_errors

## 获取特定类别的错误
static func get_errors_by_category(category: ErrorCategory) -> Array[Dictionary]:
	"""
	获取特定类别的错误
	@param category: 错误类别
	@return: 错误列表
	"""
	var handler = get_instance()
	var filtered_errors: Array[Dictionary] = []
	
	for error in handler.error_log:
		if error.category == category:
			filtered_errors.append(error)
	
	return filtered_errors

## 清除错误日志
static func clear_log() -> void:
	"""清除所有错误日志"""
	get_instance().error_log.clear()

## 导出错误日志
static func export_log_to_file(file_path: String = "user://error_log.json") -> bool:
	"""
	将错误日志导出到文件
	@param file_path: 文件路径
	@return: 是否成功
	"""
	var handler = get_instance()
	var file = FileAccess.open(file_path, FileAccess.WRITE)
	
	if file:
		var json_string = JSON.stringify(handler.error_log)
		file.store_string(json_string)
		file.close()
		log_info("Error log exported to: " + file_path)
		return true
	else:
		log_error("Failed to export error log to: " + file_path)
		return false

## 处理未捕获的错误
static func handle_uncaught_error(error_message: String, stack_trace: Array = []) -> void:
	"""
	处理未捕获的错误
	@param error_message: 错误消息
	@param stack_trace: 堆栈跟踪
	"""
	var details = {
		"stack_trace": stack_trace,
		"is_uncaught": true
	}
	log_error("Uncaught error: " + error_message, ErrorLevel.CRITICAL, ErrorCategory.SYSTEM, details)

## 获取错误统计
static func get_error_statistics() -> Dictionary:
	"""
	获取错误统计信息
	@return: 统计信息字典
	"""
	var handler = get_instance()
	var stats = {
		"total_errors": handler.error_log.size(),
		"by_level": {},
		"by_category": {},
		"recent_errors": 0  # 最近1小时的错误数
	}
	
	# 初始化计数器
	for level in ErrorLevel.values():
		stats.by_level[ErrorLevel.keys()[level]] = 0
	
	for category in ErrorCategory.values():
		stats.by_category[ErrorCategory.keys()[category]] = 0
	
	# 统计错误
	var current_time = Time.get_unix_time_from_system()
	var one_hour_ago = current_time - 3600  # 1小时前
	
	for error in handler.error_log:
		# 按级别统计
		var level_key = ErrorLevel.keys()[error.level]
		stats.by_level[level_key] += 1
		
		# 按类别统计
		var category_key = ErrorCategory.keys()[error.category]
		stats.by_category[category_key] += 1
		
		# 最近错误统计
		if error.timestamp > one_hour_ago:
			stats.recent_errors += 1
	
	return stats