using System;
using System.Collections.Generic;
using System.Text;
using System.Text.RegularExpressions;
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 static string chan = "#halsa";
    }

    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 " + Configuration.chan);
            }

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

        static public void run()
        {
            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 (Regex.IsMatch(inputLine, @"^:(.*?)\!(.*?) PRIVMSG (#.*?) :Hullo"))
                EH.makeHulloEvent(inputLine, args);

            else if (Regex.IsMatch(inputLine, @":(.*?)\!(.*?) PRIVMSG (.*?) :(.*?)\s?"))
            {
                if (Regex.IsMatch(inputLine, @":(.*?)\!(.*?) PRIVMSG (.*?) :\u0001"))
                    EH.makePingEvent(inputLine, args);

                else if (args.Length > 3)
                    EH.makeMsgEvent(inputLine, args);
            }

            if (inputLine.IndexOf("PING :" + Configuration.server) > -1)
                EH.makeServerPingEvent(inputLine, args);
              
        }

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

        static public void say(string msg)
        {
            writer.WriteLine("PRIVMSG :" + msg);
            writer.Flush();
        }
    }

    public class EventHandling
    {
        bool run = false;

        //MSG
        public delegate void MsgEvent(object sender, MsgEventArgs args);
        public event MsgEvent OnMsg;

        //Ping
        public delegate void PingEvent(object sender, PingEventArgs args);
        public event PingEvent OnPing;

        //Hullo
        public delegate void HulloEvent(object sender, HulloEventArgs args);
        public event HulloEvent OnHullo;
        
        //ServerPing
        public delegate void ServerPingEvent(object sender, ServerPingEventArgs args);
        public event ServerPingEvent OnServerPing;

        //Event
        public void mainEventThing()
        {

            if (!run)
            {
                this.OnHullo += new HulloEvent(this.handleHullo);
                this.OnPing += new PingEvent(this.handlePing);
                this.OnMsg += new MsgEvent(this.handleMsg);

                run = true;
            }
        }

        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];

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

        public void makeMsgEvent(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];
            string msg = line.Split(':')[2];

            MsgEventArgs msgea = new MsgEventArgs(nick, ident, channel, msg);
            if (OnMsg != null)
                OnMsg(this, msgea);
        }

        public void makePingEvent(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];
            string msg = line.Split(':')[2];

            PingEventArgs hubj = new PingEventArgs(nick, ident, channel, msg);
            if (OnPing != null)
                OnPing(this, hubj);
        }
       
        public void makeServerPingEvent(string line, string[] args)
        {
            string server = args[1];

            ServerPingEventArgs hubj = new ServerPingEventArgs(server);
            if (OnServerPing != null)
                OnServerPing(this, hubj);
        }

        //Handling
        public void handleHullo(object sender, HulloEventArgs args)
        {
            Program.send("PRIVMSG " + Configuration.chan + " :Hullo " + args.nick + " on " + args.channel);
        }

        public void handlePing(object sender, PingEventArgs args)
        {
            Program.send("NOTICE " + args.nick + " :" + args.msg);
        }

         public void handleServerPing(object sender, ServerPingEventArgs args)
        {
            Program.send("PONG :" + args.server);
        }

        public void handleMsg(object sender, MsgEventArgs args)
        {
          //  Program.send("PRIVMSG " + Configuration.chan + " :" + args.msg + " from " + args.nick);
        }
    }

    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;
        }
    }

    public class MsgEventArgs : EventArgs
    {
        public readonly string nick;
        public readonly string ident;
        public readonly string channel;
        public readonly string msg;

        public MsgEventArgs(string who, string id, string chan, string msg)
        {
            nick = who;
            ident = id;
            channel = chan;
            this.msg = msg;
        }
    }

    public class PingEventArgs : EventArgs
    {
        public readonly string nick;
        public readonly string ident;
        public readonly string channel;
        public readonly string msg;

        public PingEventArgs(string who, string id, string chan, string msg)
        {
            nick = who;
            ident = id;
            channel = chan;
            this.msg = msg;
        }
    }

    public class ServerPingEventArgs : EventArgs
    {
        public readonly string server;

        public ServerPingEventArgs(string server)
        {
            this.server = server;
        }
    }
}