using System.Data;
using System.Net.Sockets;
using System.Text;

namespace riff;

class Program
{
    static void Main(string[] args)
    {
        var bot = new IRCBot("testbot", "~nebula");
        var subBot = new SubBot("otherbot", "also ~nebula");
        new Thread(new ThreadStart(bot.MainLoop)).Start();
        new Thread(new ThreadStart(subBot.MainLoop)).Start();
    }

    public class IRCBot
    {
        private int Port = 6667;
        private string Host = "localhost";
        private string? Nick;
        private string? RealName;
        private TcpClient Client;
        private NetworkStream Stream;

        public IRCBot(string nick, string realname)
        {
            Nick = nick;
            RealName = realname;
            Client = new TcpClient(Host, Port);
            Stream = Client.GetStream();
            SendLine($"NICK {Nick}");
            SendLine($"USER {Nick} 0 * :{RealName}");
            SendLine("JOIN #bots");
        }

        public void SendLine(string line)
        {
            Byte[] bytes = Encoding.UTF8.GetBytes(line + "\r\n");
            Stream.Write(bytes, 0, bytes.Length);
        }

        public virtual void TestPrompt()
        {
            Console.WriteLine("Main class says hello");
        }

        public void MainLoop()
        {
            using var reader = new StreamReader(Stream, Encoding.UTF8);
            while (true)
            {
                string? line = reader.ReadLine();
                if (line == null)
                {
                    Console.WriteLine($"{Nick} disconnected");
                    break;
                }
                if (line.StartsWith("PING"))
                {
                    SendLine("PONG " + line[5..]);
                    continue;
                }
                TestPrompt();
                IRCMessage msg = new(line);
                switch (msg.Command)
                {
                    case "PRIVMSG":
                        // PRIVMSG privmsg = new(msg);
                        // Console.WriteLine(privmsg.Body);
                        break;

                }
            }
        }
    }

    public class SubBot : IRCBot
    {
        public Action[] commands = []; 

        public SubBot(string nick, string realname) : base(nick, realname)
        {

        }

        public void HelpCommand(string line)
        {
            SendLine("PRIVMSG #bots :helptext");
        }

        public override void TestPrompt()
        {
            Console.WriteLine("hello from SubBot");
        }
    }

    public class IRCMessage
    {
        public string? Source;
        public string Command;
        public List<string> Arguments;

        public IRCMessage(string line)
        {
            string[] split;
            List<string> args = new();
            if (line[0] == ':')
            {
                split = line[1..].Split(' ', 2);
                Source = split[0];
                line = split[1];
            }
            if (line.IndexOf(" :") != -1)
            {
                split = line.Split(" :", 2);
                foreach (string arg in split[0].Split(' '))
                    args.Add(arg);
                args.Add(split[1]);
            }
            else
            {
                foreach (string arg in line.Split(' '))
                    args.Add(arg);
            }
            Command = args[0];
            Arguments = args[1..];
        }
    }

    public class PRIVMSG
    {
        public string Body { get; set; }
        public string Channel { get; set; }
        public string Nick { get; set; }

        public PRIVMSG(IRCMessage message)
        {
            if (message.Source == null)
                throw new NoNullAllowedException();
            Nick = message.Source.Substring(0, message.Source.IndexOf("!") - 1);
            Channel = message.Arguments[0];
            Body = message.Arguments[1];
        }
    }
}