using System;
using System.IO;
using System.Collections.Generic;
using System.Collections;
using System.Xml;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading;

/******************************************************************************/
public static class zpravy
/******************************************************************************/
{
  public static bool server;

  public static void log(string s)
  {
    string log_jmeno_souboru;
    if (server) {
      log_jmeno_souboru = "das.server.log";
    } else {
      log_jmeno_souboru = "das.klient.log";
    }
    //Console.WriteLine(s);
    try {
      using (StreamWriter sw = File.AppendText(log_jmeno_souboru)) {
        sw.Write(Convert.ToString(System.DateTime.Now) + " ");
        sw.WriteLine(s);
        sw.Flush();
        sw.Close();
      }
    } catch {
    }
  }

  static string[] ostatni_udalost_parametry = new string[6];
  static string[] ostatni_udalost = new string[6];

  static string[] text = new string[6];

  public static void notifikuj(int hrac, string a)
  {
    text[hrac] = a;
    zpravy.log("notifikace pro hrace #" + hrac + " " + a);
  }

  public static string udalost(int hrac)
  {
    string a = text[hrac];
    return a;
  }

  public static void notifikuj2(int hrac, string a, string b)
  {
    ostatni_udalost[hrac] = a;
    ostatni_udalost_parametry[hrac] = b;
    zpravy.log("parametricka notifikace pro hrace #" + hrac + " " + a + "(" + b + ")");
  }

  public static string ostatni_udalosti(int hrac)
  {
    string a = ostatni_udalost[hrac];
    return a;
  }

  public static string parametry_ostatni_udalosti(int hrac)
  {
    string a = ostatni_udalost_parametry[hrac];
    return a;
  }

  public static void smaz_ostatni_udalosti(int hrac)
  {
    ostatni_udalost[hrac] = "";
    ostatni_udalost_parametry[hrac] = "";
  }

  public static void smaz_udalost(int hrac)
  {
    text[hrac] = "";
  }

  public static string base64Encode(string data)
  {
    try
    {
      byte[] encData_byte = new byte[data.Length];
      encData_byte = System.Text.Encoding.UTF8.GetBytes(data);    
      string encodedData = Convert.ToBase64String(encData_byte);
      return encodedData;
    }
    catch(Exception e)
    {
      return("Error in base64Encode" + e.Message);
    }
  }

  public static string base64Decode(string data)
  {
    try
    {
      System.Text.UTF8Encoding encoder = new System.Text.UTF8Encoding();  
      System.Text.Decoder utf8Decode = encoder.GetDecoder();
      byte[] todecode_byte = Convert.FromBase64String(data);
      int charCount = utf8Decode.GetCharCount(todecode_byte, 0, todecode_byte.Length);
      char[] decoded_char = new char[charCount];
      utf8Decode.GetChars(todecode_byte, 0, todecode_byte.Length, decoded_char, 0);
      string result = new String(decoded_char);
      return result;
    }
    catch(Exception e)
    {
      return("Error in base64Decode" + e.Message);
    }
  }
}