using System;
using System.Diagnostics;
using System.IO;

namespace ANX.Framework.NonXNA
{
    public static class Logger
    {
        #region Constants
        private const string Filename = "log.txt";
        #endregion

        #region Private
#if !WINDOWSMETRO
        private static FileStream outputStream;
        private static StreamWriter writer;
#else
        private static ANX.Framework.NonXNA.Windows8.MetroLogger logger;
#endif

        private static string CurrentDateTimeStamp
        {
            get
            {
                DateTime stamp = DateTime.Now;
                return stamp.Year + "-" + stamp.Month.ToString("00") + "-" +
                    stamp.Day.ToString("00") + " " + stamp.Hour.ToString("00") + ":" +
                    stamp.Minute.ToString("00") + ":" + stamp.Second.ToString("00");
            }
        }

        private static string CurrentTimeStamp
        {
            get
            {
                DateTime stamp = DateTime.Now;
                return stamp.Hour.ToString("00") + ":" + stamp.Minute.ToString("00") +
                    ":" + stamp.Second.ToString("00");
            }
        }
        #endregion

        #region Public
        public static bool IsWritingToConsole;
        #endregion

        #region Constructor
        static Logger()
        {
            IsWritingToConsole = true;

#if !WINDOWSMETRO
            outputStream = File.Open(Filename, FileMode.Create, FileAccess.Write, FileShare.ReadWrite);
            writer = new StreamWriter(outputStream);
            writer.AutoFlush = true;
#else
            //logger = new ANX.Framework.NonXNA.Windows8.MetroLogger();
            //logger.Initialize(Filename);
#endif

            WriteToFile("OS: " + OSInformation.GetName() + " - " + OSInformation.GetVersionString() + "(" +
                OSInformation.GetVersion() + ")");
            WriteToFile("StartTime: " + CurrentDateTimeStamp);
            WriteToFile("----------");
        }
        #endregion

        #region Info
        public static void Info(string message)
        {
            string text = CurrentTimeStamp + "| " + message;
            WriteToConsole(text);
            WriteToFile(text);
        }

        public static void Info(string message, params object[] formatObjects)
        {
            Info(String.Format(message, formatObjects));
        }
        #endregion

        #region Warning
        public static void Warning(string message, bool stacktrace = true)
        {
            string text = CurrentTimeStamp + "| Warning: " + message;
            if (stacktrace)
                text += BuildStackTrace();

            WriteToConsole(text);
            WriteToFile(text);
        }
        #endregion

        #region Error
        public static void Error(string message, Exception ex)
        {
            Error(String.Format("{0} - Exception: {1}", message, ex.Message));
        }

        public static void Error(string message)
        {
            string text = CurrentTimeStamp + "| Error: " + message + BuildStackTrace();
            WriteToConsole(text);
            WriteToFile(text);
        }
        #endregion

        #region ErrorAndThrow
        public static void ErrorAndThrow<T>(string message) where T : Exception, new()
        {
            string text = CurrentTimeStamp + "| Error: " + message + BuildStackTrace();
            WriteToConsole(text);
            WriteToFile(text);

            throw (T)Activator.CreateInstance(typeof(T), message);
        }
        #endregion

        #region BuildStackTrace
        private static string BuildStackTrace()
        {
            string result = "";
#if !WINDOWSMETRO
            string[] lines = new StackTrace(true).ToString().Split('\n');
            for (int index = 2; index < lines.Length; index++)
            {
                result += "\n" + lines[index].ToString();
            }
#endif
            return result;
        }
        #endregion

        #region WriteToConsole
        private static void WriteToConsole(string message)
        {
            if (IsWritingToConsole == false)
            {
                return;
            }

#if !WINDOWSMETRO
            Console.WriteLine(message);
#endif
        }
        #endregion

        #region WriteToFile
        private static void WriteToFile(string message)
        {
#if !WINDOWSMETRO
            writer.WriteLine(message);
#else
            ANX.Framework.NonXNA.Windows8.MetroEventSource.Log.Info(message);
#endif
        }
        #endregion
    }
}