package com.nilhcem.fakesmtp.gui.info;

 import java.awt.Font;

 import java.util.Observable;

 import java.util.Observer;

 import javax.swing.JLabel;

 import com.nilhcem.fakesmtp.model.UIModel;

 import com.nilhcem.fakesmtp.server.MailSaver;

 import com.apple.eawt.Application;

 import org.slf4j.Logger;

 import org.slf4j.LoggerFactory;

 /**

  * Label class to display the number of received emails.

  *

  * @author Nilhcem

  * @since 1.0

  */

 public final class NbReceivedLabel implements Observer {

         private static final Logger LOGGER = LoggerFactory.getLogger(NbReceivedLabel.class);

         private final JLabel nbReceived = new JLabel("0");

         /**

          * Creates the label class (with a bold font).

          */

         public NbReceivedLabel() {

                 Font boldFont = new Font(nbReceived.getFont().getName(), Font.BOLD, nbReceived.getFont().getSize());

                 nbReceived.setFont(boldFont);

         }

         /**

          * Returns the JLabel object.

          *

          * @return the JLabel object.

          */

         public JLabel get() {

                 return nbReceived;

         }

         /**

          * Actions which will be done when the component will be notified by an Observable object.

          * <ul>

          *   <li>If the observable element is a {@link MailSaver} object, the method will increment

          *   the number of received messages and update the {@link UIModel};</li>

          *   <li>If the observable element is a {@link ClearAllButton}, the method will reinitialize

          *   the number of received messages and update the {@link UIModel};</li>

          *   <li>When running on OS X the method will also update the Dock Icon with the number of

          *   received messages.</li>

          * </ul>

          *

          * @param o the observable element which will notify this class.

          * @param arg optional parameters (not used).

          */

         @Override

         public void update(Observable o, Object arg) {

                 if (o instanceof MailSaver) {

                         UIModel model = UIModel.INSTANCE;

                         int countMsg = model.getNbMessageReceived() + 1;

                         String countMsgStr = Integer.toString(countMsg);

                         model.setNbMessageReceived(countMsg);

                         updateDockIconBadge(countMsgStr);

                         nbReceived.setText(countMsgStr);

                 } else if (o instanceof ClearAllButton) {

                         UIModel.INSTANCE.setNbMessageReceived(0);

                         updateDockIconBadge("");

                         nbReceived.setText("0");

                 }

         }

         private void updateDockIconBadge(String badgeValue) {

                 try {

                         Application.getApplication().setDockIconBadge(badgeValue);

                 } catch (RuntimeException e) {

                         LOGGER.debug("Error: {} - This is probably because we run on a non-Mac platform and these components are not implemented", e.getMessage());

                 } catch (Exception e) {

                         LOGGER.error("", e);

                 }

         }

 }