import edu.vt.cs.collab.cork.ObjectID;
import edu.vt.cs.collab.cork.ReplicatedObjectClient;
import edu.vt.cs.collab.cork.impl.inet.InetClient;
import edu.vt.cs.collab.cork.search.RetrievableCriteria;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.beans.*;

/**
 * Simple CORK client that retrieves or creates a replicated TestBean.
 * Should be executed with server host and port number as arguments.
 */
public class Client3 {
    /**
     * Our replicated object client
     */
    private ReplicatedObjectClient client = null;

    /**
     * Replicated TestBean instance
     */
    private TestBean testBean = null;

    public Client3(String host, int port) {
	try {
	    client = new InetClient(host, port, InetClient.SOCKET);
	    client.login("my-id", "my-password");

	    // Connection and login succeeded if we got to this point. See
	    // if a TestBean has already been created.
	    RetrievableCriteria crit = 
		new RetrievableCriteria(client.getUser(), TestBean.class);
    	    ObjectID ids[] = client.getIdentifiers(crit);

	    if ((ids == null) || (ids.length == 0)) {
		// The search didn't find TestBeans, so we create one
		testBean = (TestBean) client.getNewObject(TestBean.class, null);
	    }
	    else {
		// We have at least one TestBean replica in the server. We
		// could do other tests if we had more than one, but for 
		// this demo we just take the first one.
		testBean = (TestBean) client.getObject(ids[0]);
	    }

	    // Attach a listener to ensure that remote replicas find 
	    // out about local changes:
	    testBean.addPropertyChangeListener(new TestBeanListener(client));
	}
	catch(SecurityException se) {
	    System.err.println("Login failed: ");
	    se.printStackTrace();
	}
	catch(Exception e) {
	    System.err.println("Client connection error: ");
	    e.printStackTrace();
	}
    }

    /**
     * Displays a simple UI for viewing and changing the replicated
     * TestBean's state.
     */
    public void showUI() {
	// Make a window
	JFrame f = new JFrame("TestBean demo");

	// Kill the client when the window closes
	f.addWindowListener(new WindowAdapter() {
	    public void windowClosing(WindowEvent evt) {
		System.exit(0);
	    }
	});

	Container pane = f.getContentPane();
	pane.setLayout(new GridLayout(2, 1, 3, 3));
	JPanel top = new JPanel();
	pane.add(top);
	top.setLayout(new BorderLayout());
	top.add(new JLabel("value: "), BorderLayout.WEST);
	final JTextField current = new JTextField();
	top.add(current, BorderLayout.CENTER);
	current.setEditable(false);

	// Initialize the current value field
	if (testBean.getValue() != null)
	    current.setText(testBean.getValue());
	else
	    current.setText("<null>");

	// Listen for changes to the "value" property, update the
	// field when changes occurr.
	testBean.addPropertyChangeListener(new PropertyChangeListener() {
	    public void propertyChange(PropertyChangeEvent pce) {
		if (testBean.getValue() != null)
	    	    current.setText(testBean.getValue());
		else
	    	    current.setText("<null>");
	    }
	});

	JPanel bottom = new JPanel();
	pane.add(bottom);
	bottom.setLayout(new BorderLayout());

	// Add a field to the bottom for entering a new value
	final JTextField newValue = new JTextField();
	bottom.add(newValue, BorderLayout.CENTER);
	JButton button = new JButton("Set");
	bottom.add(button, BorderLayout.EAST);

	// An action listener (for both the button and the field) that
	// updates the replica.
	ActionListener al = new ActionListener() {
	    public void actionPerformed(ActionEvent evt) {
		testBean.setValue(newValue.getText());
	    }
	};
	button.addActionListener(al);
	newValue.addActionListener(al);

	f.pack();
	f.setSize(300, f.getSize().height);
	f.show();
    }

    public static void main(String[] args) {
	int port = Integer.parseInt(args[1]);
	Client3 c = new Client3(args[0], port);
	c.showUI();
    }
}