using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Xml.Serialization;
using TransportGame.Business;
using TransportGame.Model;

namespace TransportGame.Utils
{
    public static class Logger
    {
        public static readonly string LogsDirectory = "Logs";

        private static string logFile = null;

        public enum Level
        {
            Info,
            Warning,
            Error,
            Critical
        }

        public static void Log(Level level, string format, params object[] args)
        {
            // Open log file if not opened
            if (logFile == null)
            {
                // Create logs folder
                if (!Directory.Exists(LogsDirectory))
                    Directory.CreateDirectory(LogsDirectory);

                // Create log file
                logFile = Path.Combine(LogsDirectory, String.Format("{0:s}.log", DateTime.Now).Replace(':', '_'));
            }

            lock (logFile)
            {
                using (var writer = new StreamWriter(logFile, true))
                {
                    // Log to file
                    writer.Write("[{0}] ", Enum.GetName(typeof(Level), level));
                    writer.Write(DateTime.Now.ToString("%HH:%mm:%ss.%FFF"));
                    writer.WriteLine(": " + format, args);
                    writer.Close();
                }

                // Log to unity
                switch (level)
                {
                    case Level.Warning:
                        UnityEngine.Debug.LogWarning(String.Format(format, args));
                        break;

                    case Level.Error:
                        UnityEngine.Debug.LogError(String.Format(format, args));
                        break;

                    case Level.Critical:
                        UnityEngine.Debug.LogError(String.Format(format, args));
                        break;
                }
            }
        }

        public static void Info(string format, params object[] args)
        {
            Log(Level.Info, format, args);
        }

        public static void Warning(string format, params object[] args)
        {
            Log(Level.Warning, format, args);
        }
        public static void Error(string format, params object[] args)
        {
            Log(Level.Error, format, args);
        }
        public static void Critical(string format, params object[] args)
        {
            Log(Level.Critical, format, args);
        }
        public static void Exception(Exception ex)
        {
            Log(Level.Critical, "{0}: {1}\nStack trace:{2}", ex.GetType().ToString(), ex.Message, ex.StackTrace);
        }

        public static void DumpMap(Map map, string filename)
        {
            map.SerializeXml(Path.Combine(LogsDirectory, filename));
        }
    }
}