namespace ServiceShared
{
    public static class Log
    {
        /// <summary>
        /// Log path
        /// </summary>
        private static string LogPath = null;

        /// <summary>
        /// Current LogType from the configuration
        /// </summary>
        private static Log.Types _LogType = Log.Types.INFO;

        /// <summary>
        /// Flag to cotrol writing queue
        /// </summary>
        private static bool LogWriting = false;

        /// <summary>
        /// Error types
        /// </summary>
        public enum Types { CRITICAL, ERROR, INFO, LOG, TRACE, DEBUG, WARNING }

        /// <summary>
        /// Database controller for trace logs
        /// </summary>
        private static Database.Controllers.Traces dbTraces = null;

        /// <summary>
        /// Sets database controller for trace logs
        /// </summary>
        /// <param name="_dbTraces"></param>
        public static void SetTraceDbController(Database.Controllers.Traces _dbTraces)
        {
            dbTraces = _dbTraces;
        }

        /// <summary>
        /// Sets the log path
        /// </summary>
        /// <param name="logPath">log path</param>
        public static void SetLogPath(string logPath)
        {
            try
            {
                LogPath = logPath;

                if (!Directory.Exists(LogPath))
                {
                    Directory.CreateDirectory(LogPath);
                }
            }
            catch(Exception ex)
            {
                Log.Error(ex, "Log", "SetLogPath");
            }
        }

        /// <summary>
        /// Sets the log type
        /// </summary>
        /// <param name="Log.Types">Log.Types</param>
        public static void SetLog(Log.Types logType)
        {
            _LogType = logType;
        }

        /// <summary>
        /// Writes a critical log in the file and sends it via mail
        /// </summary>
        /// <param name="ex">Exception that was throwen</param>
        /// <param name="className">Class name where the exception was throwen</param>
        /// <param name="methodeName">Methode name where the exception was throwen</param>
        public static void Critical(Exception ex, string className, string methodeName)
        {
            try
            {
                string msg = ex.Message + "(" + className + " => " + methodeName + ")";
                Log.Write(msg, Types.CRITICAL);

                string subject = "[" + Types.CRITICAL.ToString() + "][" + className + "][" + methodeName + "]";
                Mail.SendLogs(subject, msg);
            }
            catch (Exception ex1)
            {
                Log.Error(ex1, "ServiceShared.Log", "Critical");
            }
        }

        /// <summary>
        /// Writes a error log in the file and (optional sends it via mail)
        /// </summary>
        /// <param name="ex">Exception that was throwen</param>
        /// <param name="className">Class name where the exception was throwen</param>
        /// <param name="methodeName">Methode name where the exception was throwen</param>
        /// <param name="sendMail">Flag if this log has to be sent via mail</param>
        public static void Error(Exception ex, string className, string methodeName, bool sendMail = false)
        {
            if(sendMail)
            {
                Log.Critical(ex, className, methodeName);
            }
            else
            {
                Log.Write(ex.Message + "(" + className + " => " + methodeName + ")", Types.ERROR);
            }
        }

        /// <summary>
        /// Writes a warning log in the file
        /// </summary>
        /// <param name="message">warning message</param>
        /// <param name="className">Class name where the exception was throwen</param>
        /// <param name="methodeName">Methode name where the exception was throwen</param>
        public static void Warning(string message, string className, string methodeName)
        {
            Log.Write(message + "(" + className + " => " + methodeName + ")", Types.WARNING);
        }

        /// <summary>
        /// Creates trace log in the database
        /// </summary>
        /// <param name="message">Message of trace log</param>
        /// <param name="pgs">PGS of results</param>
        /// <param name="udid">UDID of device</param>
        /// <param name="type">Type of trace log</param>
        public static void Trace(string message, string pgs, string udid = null, Types type = Types.TRACE)
        {
            try
            {
                if(dbTraces != null)
                {
                    dbTraces.Create(new Models.Database.Traces()
                    {
                        PGS = pgs,
                        UDID = udid,
                        Message = message,
                        TraceType = type
                    });
                }
            }
            catch (Exception ex)
            {
                Log.Write(ex.Message, Types.TRACE);
            }
        }

        /// <summary>
        /// Creates trace log in the database
        /// </summary>
        /// <param name="traces">Traces object</param>
        public static void Trace(Models.Database.Traces traces)
        {
            try
            {
                if (dbTraces != null)
                {
                    dbTraces.Create(traces);
                }
            }
            catch (Exception ex)
            {
                Log.Write(ex.Message, Types.TRACE);
            }
        }

        /// <summary>
        /// Writes a info message to the log
        /// </summary>
        /// <param name="message">message that should be written in the log file</param>
        public static void Info(string message)
        {
            Log.Write(message, Types.INFO);
        }

        /// <summary>
        /// Writes a debug message to the log
        /// </summary>
        /// <param name="message">message that should be written in the log file</param>
        public static void Debug(string message)
        {
            Log.Write(message, Types.DEBUG);
        }

        /// <summary>
        /// Writes message to the file
        /// </summary>
        /// <param name="message">message</param>
        public static void Write(string message, Types type)
        {
            try
            {
                bool write_log = false;

                if(type == _LogType || 
                  (_LogType == Types.CRITICAL && type == Types.ERROR) ||
                   (_LogType == Types.ERROR && type == Types.CRITICAL) ||
                  _LogType == Types.DEBUG)
                {
                    write_log = true;
                }

                if(write_log)
                {
                    string msg = DateTime.Now.ToString("dd.MM.yyyy HH:mm:ss") + " [" + type.ToString() + "]: " + message + "\r\n";
                    string path = (!string.IsNullOrEmpty(LogPath) ? LogPath + Path.DirectorySeparatorChar : "") + DateTime.Now.ToString("yyyy_MM_dd") + ".log";

                    if (!LogWriting)
                    {
                        LogWriting = true;
                        File.AppendAllText(path, msg);
                        LogWriting = false;
                    }

                    if (type == Types.DEBUG)
                    {
                        Console.WriteLine(msg);
                    }
                }
            }
            catch (Exception ex)
            {
                Console.Write(ex.ToString());
            }
        }
    }
}