import java.net.ServerSocket;
import java.net.Socket;

import java.io.OutputStreamWriter;
import java.io.BufferedWriter;
import java.io.PrintWriter;
import java.io.IOException;

import java.util.ArrayList;
import java.util.Iterator;

import java.awt.Container;
import java.awt.FlowLayout;

import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;

import javax.swing.JFrame;
import javax.swing.JTextField;
import javax.swing.JButton;

class ClientConnection {
    private static ArrayList allClients = new ArrayList();
    private final Socket socket;
    private final PrintWriter out;

    public ClientConnection(Socket s) throws IOException {
        socket = s;
        out = new PrintWriter(
                  new BufferedWriter(
                      new OutputStreamWriter(
                          socket.getOutputStream())), true);
        System.out.println("En klienttråd har skapats.");
        allClients.add(this);
    }
    public static void sendToAllClients(String line) {
        Iterator i = allClients.iterator();
        while (i.hasNext()) {
            ClientConnection t = (ClientConnection)i.next();
            t.out.println(line);
        }
    }
} // class ClientConnection

public class GrafiskServer {
    public static final int PORT = 3003;

    public static void main(String[] args) throws IOException {
        JFrame frame = new JFrame("GrafiskServer");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        Container cp = frame.getContentPane();
        cp.setLayout(new FlowLayout());
        final JTextField textfield = new JTextField("Kilpisjärvi -41");
        JButton button = new JButton("Skicka");
        button.addActionListener(new ActionListener() {
                public void actionPerformed(ActionEvent e) {
                    String inline = textfield.getText();
                    System.out.println("Du sa '" + inline + "'");
                    ClientConnection.sendToAllClients(inline);
                }
            });
        cp.add(textfield);
        cp.add(button);
        frame.pack();
        frame.setVisible(true);

        ServerSocket s = new ServerSocket(PORT);
        System.out.println("Server-socketen: " + s);
        System.out.println("Servern lyssnar...");

        try {
            while(true) {
                // Blocks until a connection occurs:
                Socket socket = s.accept();
                System.out.println("Uppkoppling accepterad.");
                System.out.println("Den nya socketen: " + socket);
                try {
                    ClientConnection cc = new ClientConnection(socket);
                    System.out.println("Ny klientkoppling skapad.");
                    System.out.println("Den nya klientkopplingen: " + cc);
                }
                catch(IOException e) {
                    // If the constructor fails, close the socket,
                    // otherwise the thread will close it:
                    socket.close();
                }
            }
        }
        finally {
            s.close();
        }
    } // main
} // GrafiskServer