C# Logger类

namespace System.IO
{
    public enum LogLevel
    {
        Debug,
        Info,
        Warning,
        Error,
        Fatal
    }

    public static class Logging
    {
        private static string _logFilePath;
        private static LogLevel _minLogLevel;

        public static void BasicConfig(string logFilePath, LogLevel minLogLevel = LogLevel.Info)
        {
            _logFilePath = logFilePath;
            _minLogLevel = minLogLevel;
        }

        public static void Log(LogLevel level, string message, Exception ex = null)
        {
            if (level < _minLogLevel)
            {
                return;
            }

            string logMessage = $"{DateTime.Now.ToString("yyyy-MM-dd_HH:mm:ss")} [{level}] - {message}";

            if (ex != null)
            {
                logMessage += $" Exception: {ex.ToString()}";
            }

            try
            {
                File.AppendAllText(_logFilePath, logMessage + "\r\n");
            }
            catch (Exception ex2)
            {
                throw new Exception($"Failed to write to log file: {ex2.Message}");
            }
        }

        public static void Debug(string message, Exception ex = null)
        {
            Log(LogLevel.Debug, message, ex);
        }

        public static void Info(string message, Exception ex = null)
        {
            Log(LogLevel.Info, message, ex);
        }

        public static void Warning(string message, Exception ex = null)
        {
            Log(LogLevel.Warning, message, ex);
        }

        public static void Error(string message, Exception ex = null)
        {
            Log(LogLevel.Error, message, ex);
        }

        public static void Fatal(string message, Exception ex = null)
        {
            Log(LogLevel.Fatal, message, ex);
        }
    }
}