/**
 * $Revision: $
 * $Date: $
 *
 * Copyright (C) 2006 Jive Software. All rights reserved.
 *
 * This software is published under the terms of the GNU Lesser Public License (LGPL),
 * a copy of which is included in this distribution.
 */

package org.jivesoftware.spark.ui.conferences;

import org.jivesoftware.resource.SparkRes;
import org.jivesoftware.smack.XMPPException;
import org.jivesoftware.smackx.ServiceDiscoveryManager;
import org.jivesoftware.smackx.muc.MultiUserChat;
import org.jivesoftware.smackx.muc.RoomInfo;
import org.jivesoftware.smackx.packet.DiscoverItems;
import org.jivesoftware.spark.SparkManager;
import org.jivesoftware.spark.component.JiveTreeCellRenderer;
import org.jivesoftware.spark.component.JiveTreeNode;
import org.jivesoftware.spark.component.TitlePanel;
import org.jivesoftware.spark.component.Tree;
import org.jivesoftware.spark.util.SwingWorker;
import org.jivesoftware.spark.util.log.Log;

import javax.swing.JDialog;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.util.Iterator;

public class RoomBrowser extends JPanel {
    private JLabel descriptionLabel = new JLabel();
    private JLabel subjectLabel = new JLabel();
    private JLabel occupantsLabel = new JLabel();
    private JLabel roomNameLabel = new JLabel();

    private JLabel descriptionValue = new JLabel();
    private JLabel subjectValue = new JLabel();
    private JLabel occupantsValue = new JLabel();
    private JLabel roomNameValue = new JLabel();

    private JiveTreeNode rootNode;
    private Tree tree;

    public RoomBrowser() {
        descriptionLabel.setText("Description:");
        subjectLabel.setText("Subject:");
        occupantsLabel.setText("Occupants:");
        roomNameLabel.setText("Room Name:");

        // Add labels to UI
        setLayout(new GridBagLayout());
        add(descriptionLabel, new GridBagConstraints(0, 0, 1, 1, 0.0, 0.0, GridBagConstraints.WEST, GridBagConstraints.NONE, new Insets(5, 5, 5, 5), 0, 0));
        add(descriptionValue, new GridBagConstraints(1, 0, 1, 1, 1.0, 0.0, GridBagConstraints.WEST, GridBagConstraints.HORIZONTAL, new Insets(5, 5, 5, 5), 0, 0));

        add(subjectLabel, new GridBagConstraints(0, 1, 1, 1, 0.0, 0.0, GridBagConstraints.WEST, GridBagConstraints.NONE, new Insets(5, 5, 5, 5), 0, 0));
        add(subjectValue, new GridBagConstraints(1, 1, 1, 1, 1.0, 0.0, GridBagConstraints.WEST, GridBagConstraints.HORIZONTAL, new Insets(5, 5, 5, 5), 0, 0));

        add(occupantsLabel, new GridBagConstraints(0, 2, 1, 1, 0.0, 0.0, GridBagConstraints.WEST, GridBagConstraints.NONE, new Insets(5, 5, 5, 5), 0, 0));
        add(occupantsValue, new GridBagConstraints(1, 2, 1, 1, 1.0, 0.0, GridBagConstraints.WEST, GridBagConstraints.HORIZONTAL, new Insets(5, 5, 5, 5), 0, 0));

        add(roomNameLabel, new GridBagConstraints(0, 3, 1, 1, 0.0, 0.0, GridBagConstraints.WEST, GridBagConstraints.NONE, new Insets(5, 5, 5, 5), 0, 0));
        add(roomNameValue, new GridBagConstraints(1, 3, 1, 1, 1.0, 0.0, GridBagConstraints.WEST, GridBagConstraints.HORIZONTAL, new Insets(5, 5, 5, 5), 0, 0));


        rootNode = new JiveTreeNode("Users In Room", true);
        tree = new Tree(rootNode);

        add(tree, new GridBagConstraints(0, 4, 2, 1, 1.0, 1.0, GridBagConstraints.WEST, GridBagConstraints.BOTH, new Insets(5, 5, 5, 5), 0, 0));
        setBackground(Color.white);
        tree.setCellRenderer(new JiveTreeCellRenderer());


    }

    public void displayRoomInformation(final String roomJID) {
        SwingWorker worker = new SwingWorker() {
            RoomInfo roomInfo = null;
            DiscoverItems items = null;

            public Object construct() {
                try {
                    roomInfo = MultiUserChat.getRoomInfo(SparkManager.getConnection(), roomJID);


                    ServiceDiscoveryManager manager = ServiceDiscoveryManager.getInstanceFor(SparkManager.getConnection());
                    items = manager.discoverItems(roomJID);
                }
                catch (XMPPException e) {
                    Log.error(e);
                }
                return "ok";
            }

            public void finished() {
                setupRoomInformationUI(roomJID, roomInfo, items);
            }
        };

        worker.start();
    }

    private void setupRoomInformationUI(String roomJID, final RoomInfo roomInfo, final DiscoverItems items) {
        descriptionValue.setText("No description available");
        subjectValue.setText("No subject available");
        occupantsValue.setText("n/a");
        roomNameValue.setText("n/a");
        try {
            descriptionValue.setText(roomInfo.getDescription());
            subjectValue.setText(roomInfo.getSubject());

            if (roomInfo.getOccupantsCount() == -1) {
                occupantsValue.setText("n/a");
            }
            else {
                occupantsValue.setText(Integer.toString(roomInfo.getOccupantsCount()));
            }
            roomNameValue.setText(roomInfo.getRoom());

            Iterator iter = items.getItems();
            while (iter.hasNext()) {
                DiscoverItems.Item item = (DiscoverItems.Item)iter.next();
                String jid = item.getEntityID();
                rootNode.add(new JiveTreeNode(jid, false, SparkRes.getImageIcon(SparkRes.SMALL_USER1_INFORMATION)));
            }
            tree.expandRow(0);
        }
        catch (Exception e) {
            Log.error(e);
        }

        final JOptionPane pane;

        // Create the title panel for this dialog
        TitlePanel titlePanel = new TitlePanel("View Room Information", "Room information for " + roomJID, SparkRes.getImageIcon(SparkRes.BLANK_IMAGE), true);

        // Construct main panel w/ layout.
        final JPanel mainPanel = new JPanel();
        mainPanel.setLayout(new BorderLayout());
        mainPanel.add(titlePanel, BorderLayout.NORTH);

        // The user should only be able to close this dialog.
        Object[] options = {"Close"};
        pane = new JOptionPane(this, JOptionPane.PLAIN_MESSAGE, JOptionPane.OK_CANCEL_OPTION, null, options, options[0]);

        mainPanel.add(pane, BorderLayout.CENTER);

        final JOptionPane p = new JOptionPane();

        final JDialog dlg = p.createDialog(SparkManager.getMainWindow(), "Room Information");
        dlg.setModal(false);

        dlg.pack();
        dlg.setSize(450, 400);
        dlg.setResizable(true);
        dlg.setContentPane(mainPanel);
        dlg.setLocationRelativeTo(SparkManager.getMainWindow());

        PropertyChangeListener changeListener = new PropertyChangeListener() {
            public void propertyChange(PropertyChangeEvent e) {
                String value = (String)pane.getValue();
                if ("Close".equals(value)) {
                    pane.setValue(JOptionPane.UNINITIALIZED_VALUE);
                    dlg.dispose();
                }
            }
        };

        pane.addPropertyChangeListener(changeListener);

        dlg.setVisible(true);
        dlg.toFront();
        dlg.requestFocus();
    }


}
