using System.Data;

namespace riff;

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.Count > 1 ? args[1..] : new List<string>();
    }
}

public class PRIVMSG
{
    public string Body { get; set; }
    public string Sender { 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("!"));
        Body = message.Arguments[1].Trim();
        Sender = message.Arguments[0];
        if (Sender[0] != '#')
            Sender = Nick;
    }
}

public class CommandRunner
{
    public string Trigger;
    public Action<PRIVMSG> Callback;

    public CommandRunner(string trigger, Action<PRIVMSG> callback)
    {
        Callback = callback;
        Trigger = trigger;
    }

    public bool Run(PRIVMSG privmsg)
    {
        string[] split = privmsg.Body.Trim().Split(' ', 2);
        if (split[0].StartsWith('!') && split[0][1..].Equals(Trigger))
        {
            if (split.Length > 1)
                privmsg.Body = split[1];
            else
                privmsg.Body = string.Empty;
            Callback(privmsg);
            return true;
        }
        return false;
    }
}

public class PollRunner
{
    public Action Callback;
    public int Interval;

    public PollRunner(int interval, Action callback)
    {
        Interval = interval;
        Callback = callback;
    }

    public async void Start()
    {
        while (true)
        {
            await Task.Delay(Interval);
            Callback();
        }
    }
}

// public class RegexTrigger
// {
//     public string Pattern;
//     public Action<string> Callback;

//     public RegexTrigger(string pattern, Action<string> callback)
//     {
//         Pattern = pattern;
//         Callback = callback;
//     }

//     public bool Run(PRIVMSG privmsg)
//     {
//     }
// }