package protocol_sockets.example;

import java.io.*;
import protocol_sockets.*;

/**
 * <p>
 * This server waits for a {@link ExampleClient} to connect.  When it gets a
 * connection, it sends a "hello" message and than waits to the client to send
 * a username and password.
 * </p>
 * 
 * @author Stephen G. Ware
 */
public class ExampleServer extends Thread {
	
	/** The port to listen on */
	private final int port;

	/**
	 * <p>
	 * Main constructor
	 * </p>
	 * 
	 * @param port the port to listen on
	 */
	public ExampleServer(int port){
		this.port = port;
	}
	
	/**
	 * <p>
	 * When a client connects, send a "hello" message and then wait via
	 * {@link ProcotolServer#sendAndWaitForResponse(String, String)
	 * ProcotolServer#sendAndWaitForResponse(String, String)}.  After getting
	 * the information, print it to the console, tell the client to
	 * disconnect, and shut down.
	 * </p>
	 */
	public void run() {
		try{
			// Start listening for connections
			ProtocolServerSocket server = new ProtocolServerSocket(port);
			System.out.println("SERVER IS NOW RUNNING");
			// Get a new connection
			ProtocolSocket socket = (ProtocolSocket) server.accept();
			// Send a "hello" message and specify what response to wait for
			String[] credentials = socket.sendAndWaitForResponse(
				"<helloClient/>",
				"<helloServer><name>(.*)</name><password>(.*)</password></helloServer>");
			// Print the information
			System.out.println("USER \"" + credentials[0] + "\" CONNECTED WITH PASSWORD \"" + credentials[1] + "\"");
			// Tell the client to disconnect
			System.out.println("SERVER IS SHUTTING DOWN");
			socket.send("<goodbyeClient/>");
			Thread.sleep(100);
			// Shut down
			server.close();
			System.out.println("SERVER IS SHUT DOWN");
		}
		catch(IOException ex){ ex.printStackTrace(); }
		catch (InterruptedException ex){ ex.printStackTrace(); }
	}
}