package ircbot;

/**
 * JavaBot (version 1.2)
 *
 * MIT License, dydx (Josh Sandlin) <dydx@thenullbyte.org>
 *
 */

import java.io.*;
import java.net.*;
import java.util.regex.*;
import java.util.Date;

public class Main
{
    public static void main( String[] args ) throws IOException
    {
        //connection variables
        String server = "irc.snappeh.com";
        String nick = "JavaBot";
        String login = "JavaBot";
        String channel = "#bots";
        int port = 6667;

        try {

            //our socket we're connected with
            Socket irc = new Socket( server, port );
            //out output stream
            BufferedWriter bw = new BufferedWriter( new OutputStreamWriter( irc.getOutputStream() ) );
            //our input stream
            BufferedReader br = new BufferedReader( new InputStreamReader( irc.getInputStream() ) );

            //authenticate with the server
            bw.write( "NICK " + nick + "\n" );
            bw.write( "USER " + login + " thenullbyte.org JB: Java Bot\n" );
            bw.flush();

            //join a channel
            bw.write( "JOIN " + channel + "\n" );
            bw.write( "PRIVMSG " + channel + " :Whats up everybody?\n" );
            bw.flush();
            System.out.println( "Successfully connected to IRC" );

            String currLine = null;
            while( ( currLine = br.readLine() ) != null )
            {
                //checks for PING, if one is found; return a PONG
                Pattern pingRegex = Pattern.compile( "^PING", Pattern.CASE_INSENSITIVE );
                Matcher ping = pingRegex.matcher( currLine );
                if( ping.find() )
                {
                    bw.write( "PONG " + currLine.substring( 5 ) + "\n" );
                    bw.flush();
                }

                //!exit - quit current irc room
                Pattern exitRegex = Pattern.compile( "!exit", Pattern.CASE_INSENSITIVE );
                Matcher exit = exitRegex.matcher( currLine );
                if( exit.find() )
                {
                    bw.write( "PRIVMSG " + channel + " :Bye Bye\n" );
                    bw.write( "PART " + channel + "\n" );
                    bw.flush();
                    irc.close();
                }

                //!time - return current time
                Pattern timeRegex = Pattern.compile( "!time", Pattern.CASE_INSENSITIVE );
                Matcher time = timeRegex.matcher( currLine );
                if( time.find() )
                {
                    Date d = new Date();
                    bw.write( "PRIVMSG " + channel + " :" + d +"\n" );
                    bw.flush();
                }

                //!sayhi - shows a little message saying hello
                Pattern helloRegex = Pattern.compile( "!sayhi", Pattern.CASE_INSENSITIVE );
                Matcher hello = helloRegex.matcher( currLine );
                if( hello.find() )
                {
                    bw.write( "PRIVMSG " + channel + " :Hello, I'm a JavaBot. I was coded by dydx in Java!\n");
                    bw.flush();
                }

                //!join <room> - changes to a new room and sets the variables accordingly
                Pattern joinRegex = Pattern.compile( "!join", Pattern.CASE_INSENSITIVE );
                Matcher join = joinRegex.matcher( currLine );
                if( join.find() )
                {
                    String[] token = currLine.split( " " );
                    bw.write( "PRIVMSG " + channel + " :Im going over to " + token[4] + "\n" );
                    bw.write( "PART " + channel + "\n" );
                    String oldChannel = channel;
                    channel = token[4];
                    bw.write( "JOIN " + channel + "\n" );
                    bw.flush();
                }
            }
        } catch ( UnknownHostException e ) {
            System.err.println( "No such host" );
        } catch ( IOException e ) {
            System.err.println( "There was an error connecting to the host" );
        }
    }
}