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

namespace Csharpbot_tng
{
    public class Configuration
    {
        public static int port = 6667;
        public static string server = "irc.homelien.no";
        public static string nick = "CsharpTNG";
    }

    public class Program
    {
        
        
        public static string inputLine;
        public static StreamWriter writer;
        public static StreamReader reader;
        public static NetworkStream nStream;
        static TcpClient ircSock = new TcpClient();
        static void Main(string[] args)
        {
            connections();
            run();
           
        }

        static public void connections()
        {

        

            try
            {
                ircSock.Connect(Configuration.server, Configuration.port);
                nStream = ircSock.GetStream();
                reader = new StreamReader(nStream, Encoding.GetEncoding("iso-8859-15"));
                writer = new StreamWriter(nStream, Encoding.GetEncoding("iso-8859-15"));
                Console.WriteLine("Connecting to {0}, port: {1}", Configuration.server, Configuration.port);

                send("USER Espenfjo 8 * :A simple IRC-bot using the .NET framework");
                send("NICK CsharpTNG");
                send("JOIN #el-csharp");
            }

            catch (Exception e)
            {
                Console.WriteLine(e.ToString());
            }
        }

        static public void run()
        {
            //Subscribe to events

         
            while (true)
            {
                while (reader != null && (inputLine = reader.ReadLine()) != null)
                {
                    inputParser(inputLine);
                    
                }
            }
        }

        public static void inputParser(string inputLine)
        {

            EventHandling EH = new EventHandling();
            EH.mainEventThing();

            string[] args = inputLine.Split(' ');
            Console.WriteLine(inputLine);
            if (args[0].Substring(1) == Configuration.server && args[1] == "375")
                EH.makeMOTDEvent(inputLine, args);

            else if (inputLine.IndexOf("Hullo") > -1)
                EH.makeHulloEvent(inputLine, args);
        }

        static public void send(string msg)
        {
            writer.WriteLine(msg);
            writer.Flush();
        }
    }

    public class EventHandling
    {
        //Hullo
        public delegate void HulloEvent(object sender, HulloEventArgs args);
        public event HulloEvent OnHullo;
        bool run = false;
        //MOTDEvent
        public delegate void MOTDEvent(object sender, MOTDEventArgs args);
        public event MOTDEvent OnMOTD;

        public void mainEventThing()
        {

            if (!run)
            {
                this.OnHullo += new HulloEvent(this.handleHullo);

                run = true;
            }


        }

        public void makeMOTDEvent(string line, string[] args)
        {
            bool endReached = false;
            string MOTD = "";
            //read in all lines until 376 (end of motd) is reached
            do
            {
                string motdline = Program.reader.ReadLine();
                args = motdline.Split(' ');
                if (args[1] == "376") endReached = true;
                else if (args[1] == "372")
                {
                    //Line of motd received
                    MOTD += motdline.Substring(motdline.IndexOf("372 " + Configuration.nick) + Configuration.nick.Length + 6) + "\n";
                }
            }
            while (!endReached);
            //only call the event if we have subscribers	
            if (OnMOTD != null)
            {
                //Create object and fire event
                MOTDEventArgs mea = new MOTDEventArgs(MOTD);
                OnMOTD(this, mea);
            }
        }

        public void makeHulloEvent(string line, string[] args)
        {
            //Channel join - get data, create args object and fire
            string[] who = args[0].Split('!');
            string nick = who[0].Substring(1);
            string ident = who[1];
            string channel = args[2].Substring(1);

            HulloEventArgs hubj = new HulloEventArgs(nick, ident, channel);
            if (OnHullo != null)
                OnHullo(this, hubj);
        }

        public void handleHullo(object sender, HulloEventArgs args)
        {

            Program.send("PRIVMSG #el-csharp :Hello " + args.nick);
        }
    }

    public class MOTDEventArgs : EventArgs
    {
        public readonly string MOTD;

        public MOTDEventArgs(string motd)
        {
            MOTD = motd;
        }
    }

    public class HulloEventArgs : EventArgs
    {
        public readonly string nick;
        public readonly string ident;
        public readonly string channel;

        public HulloEventArgs(string who, string id, string chan)
        {
            nick = who;
            ident = id;
            channel = chan;
        }
    }
}