package se.nekotronic.udpreceiver;

import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.util.Enumeration;

public class UDPServerThread extends Thread {
	private UDPReceiveActivity parent;
	private int port;
	private boolean quit = false;
	private DatagramSocket socket;

	public UDPServerThread(UDPReceiveActivity parent, int port) {
		this.parent = parent;
		this.port = port;
	}

	public void run() {
		try {
            parent.print("Nätverksstatus...");
            showNetworkStatus();

			socket = new DatagramSocket(port);
			byte[] buf = new byte[100];
			while (!quit) {
				DatagramPacket packet = new DatagramPacket(buf, buf.length);
				parent.print("Waiting for packet...");
				socket.receive(packet);
				String message = new String(packet.getData());
				parent.print("Received packet: '" + message + "'");
			}
		} catch (SocketException e) {
			parent.print("SocketException: " + e);
		} catch (IOException e) {
			parent.print("IOExceptione: " + e);
		}            
	} // run

	public void please_stop() {
		quit = true;
		socket.close();
	}
	
    private void showNetworkStatus() {
        try {
                for (Enumeration<NetworkInterface> is = NetworkInterface.getNetworkInterfaces(); is.hasMoreElements();) {
                        NetworkInterface i = is.nextElement();
                        // parent.print("Interface: " + i.getName() + ", " + (i.isUp() ? "up" : "down")); -- Requires API 9
                        parent.print("Interface: " + i.getName());
                        for (Enumeration<InetAddress> ip = i.getInetAddresses(); ip.hasMoreElements();) {
                                InetAddress a = ip.nextElement();
                                parent.print("  Address: " + a.toString());
                        }
                }
        }
        catch (SocketException e) {
                parent.print("Caught exception: " + e);
        }
    } // showNetworkStatus
} // UDPServerThread