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

namespace timebot1 {
    class Program {
        public static TcpClient socket;
        public static StreamReader reader;
        public static StreamWriter writer;

        static bool running = true;

        static DateTime dtLaunched = DateTime.Now;

        static string
            username = "timebot",
            host = "irc.freenode.net",
            desc = "timebot",
            password = "hunter2",
            admin = "timeshifter",
            command_char = "~";

        static void Main() {
            try {
                socket = new TcpClient(host, 6667);
                socket.ReceiveBufferSize = 1024;
                Console.WriteLine("Connected");
                NetworkStream stream = socket.GetStream();
                reader = new StreamReader(stream);
                writer = new StreamWriter(stream);
                Send("USER " + username + " 8 * :" + desc);
                Send("NICK " + username);
                Send("PRIVMSG NickServ :identify " + password);
                Send("JOIN #timebot");
                ReadMessage(reader);
                reader.Close();
                writer.Close();
                stream.Close();
            }
            catch (Exception ex) {
                Console.WriteLine("Error: " + ex.Message);
            }
        }

        //shorthand command for sending to a specific target
        static void SendMessage(string target, string data) {
            Send("PRIVMSG " + target + " :" + data);
        }

        //general "send to network" command
        static void Send(string data) {
            try {
                writer.WriteLine(data);
                Console.WriteLine(">>> " + data);
                writer.Flush();
            }
            catch (Exception ex) {
                Console.WriteLine("Send error: " + ex.Message);
            }
        }

        static void ReadMessage(StreamReader reader) {
            try {
                while (running) {
                    string data = reader.ReadLine();
                    Console.WriteLine(DateTime.Now.ToString("HH:mm:ss ") + data);
                    string[] msgParts = data.Split(' ');

                    if (msgParts[0].ToLower() == "ping") { //ping request
                        Send("PONG " + msgParts[1]);
                    }
                    else {
                        string
                            user = msgParts[0].Split('!')[0].Substring(1),
                            cmd = msgParts[1].ToLower(),
                            target = msgParts[2];

                        switch (cmd) {
                            case "join":
                                //user joined target
                                //if user == username, bot joined
                                break;
                            case "part":
                                //user left target
                                //if user == username, bot left
                                break;
                            case "nick":
                                //user changed their nick
                                break;
                            case "quit":
                                //user quit
                                break;
                            case "invite":
                                //bot was invited to target
                                break;
                            case "notice":
                                string msg = data.Split(":".ToCharArray(), 3)[2];
                                if (msg.Contains("You are now identified for ")) {
                                    //bot is identified
                                    SendMessage(admin, "I am authenticated.");
                                }
                                break;
                            case "privmsg":
                                //channel or private message
                                ParseInput(user, target, data.Split(":".ToCharArray(), 3)[2]);
                                break;
                        }
                    }
                }
            }
            catch (Exception ex) {
                Console.WriteLine("Error: " + ex.Message);
                System.Threading.Thread.Sleep(15000);
                ReadMessage(reader);
            }
        }

        static void ParseInput(string user, string target, string msg) {
            if (msg.StartsWith(command_char)) { //bot command
                string[] cmdParts = msg.Split(" ".ToCharArray(), 2);

                switch (cmdParts[0].Substring(1)) {
                    case "uptime":
                        TimeSpan ts = DateTime.Now - dtLaunched;
                        SendMessage(target, string.Format("I have been running for {0}{1}{2}{3}",
                            ts.Days > 0 ? ts.Days.ToString() + "d " : "",
                            ts.Hours > 0 ? ts.Hours.ToString() + "h " : "",
                            ts.Minutes > 0 ? ts.Minutes.ToString() + "m " : "",
                            ts.Seconds.ToString() + "s"
                            ));
                        break;
                    case "hello":
                        SendMessage(target, string.Format("Greetings, {0}!", user));
                        break;
                    case "quit":
                        if (user == admin) {
                            Send("QUIT");
                            running = false;
                        }
                        break;
                    case "rolldie":
                        if(cmdParts.Length<2)
                            SendMessage(target, "Not enough parameters.");
                        else{
                            Random r = new Random();
                            int result = r.Next(int.Parse(cmdParts[1]), int.Parse(cmdParts[2]));
                            SendMessage(target, string.Format("You rolled {0}.", result);
                        }
                        break;
                }
            }
            else { // any other message

            }
        }

    }
}