OMS.NET/Common/Logger.cs

namespace OMS.NET.Common
{
    public class Log
    {
        private static readonly int _logLevel = 3; //debug
        private static int logCount = 0;
        private static string logPath = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "log", $"{DateTime.Now:yyyy-MM-dd-HH-mm-ss}.log");
        private static readonly object LogLock = new();

        private static void WriteLogToFile(string message)
        {
            lock (LogLock)
            {
                using var writer = new StreamWriter(logPath, true);
                writer.WriteLine(message);
            }
        }

        private static string GetNewLogFile()
        {
            logCount = 0;
            string path = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "log", $"{DateTime.Now:yyyy-MM-dd-HH-mm-ss}.log");
            if (!Directory.Exists(Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "log")))
            {
                Directory.CreateDirectory(Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "log"));
            }
            File.WriteAllText(path, "");
            return path;
        }

        private static void Go(string message, int level)
        {
            if (level <= _logLevel)
            {
                string logtime = DateTime.Now.ToString("[yyyy-MM-dd HH:mm:ss]");
                string leveltext = level switch
                {
                    0 => "[ERROR]",
                    1 => "[WARN] ",
                    2 => "[INFO] ",
                    3 => "[DEBUG]",
                    _ => level.ToString(),
                };
                string logtext = leveltext + " " + logtime + " " + message;
                Console.WriteLine(logtext);
                if (logCount > 100000)
                {
                    logPath = GetNewLogFile();
                }
                //File.AppendAllTextAsync(this.logPath, logtext);
                WriteLogToFile(logtext);
                logCount++;
            }
        }

        public static void Error(string message)
        {
            Go(message, 0);
        }

        public static void Warn(string message)
        {
            Go(message, 1);
        }

        public static void Info(string message)
        {
            Go(message, 2);
        }

        public static void Debug(string message)
        {
            Go(message, 3);
        }
    }
}