package com.nilhcem.fakesmtp.gui;

 import com.nilhcem.fakesmtp.core.ArgsHandler;

 import com.nilhcem.fakesmtp.core.Configuration;

 import com.nilhcem.fakesmtp.core.I18n;

 import org.slf4j.Logger;

 import org.slf4j.LoggerFactory;

 import javax.swing.JEditorPane;

 import javax.swing.JLabel;

 import javax.swing.JMenu;

 import javax.swing.JMenuBar;

 import javax.swing.JMenuItem;

 import javax.swing.JOptionPane;

 import javax.swing.event.HyperlinkEvent;

 import javax.swing.event.HyperlinkListener;

 import java.awt.Desktop;

 import java.awt.Font;

 import java.awt.event.ActionEvent;

 import java.awt.event.ActionListener;

 import java.net.URI;

 import java.util.Observable;

 /**

  * Provides the menu bar of the application.

  *

  * @author Nilhcem

  * @since 1.0

  */

 public final class MenuBar extends Observable {

         private final I18n i18n = I18n.INSTANCE;

         private final JMenuBar menuBar = new JMenuBar();

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

         /**

          * Creates the menu bar and the different menus (file / edit / help).

          */

         public MenuBar() {

                 menuBar.add(createFileMenu());

                 menuBar.add(createEditMenu());

                 menuBar.add(createHelpMenu());

         }

         /**

          * Returns the JMenuBar object.

          *

          * @return the JMenuBar object.

          */

         public JMenuBar get() {

                 return menuBar;

         }

         /**

          * Creates the file menu.

          * <p>

          * The file menu contains an "Exit" item, to quit the application.

          * </p>

          *

          * @return the newly created file menu.

          */

         private JMenu createFileMenu() {

                 JMenu fileMenu = new JMenu(i18n.get("menubar.file"));

                 fileMenu.setMnemonic(i18n.get("menubar.mnemo.file").charAt(0));

                 JMenuItem exit = new JMenuItem(i18n.get("menubar.exit"));

                 exit.setMnemonic(i18n.get("menubar.mnemo.exit").charAt(0));

                 exit.addActionListener(new ActionListener() {

                         @Override

                         public void actionPerformed(ActionEvent e) {

                                 System.exit(0);

                         }

                 });

                 fileMenu.add(exit);

                 return fileMenu;

         }

         /**

          * Creates the edit menu.

          * <p>

          * The edit menu contains a "Messages location" item, to define the location of the incoming mails.

          * </p>

          *

          * @return the newly created edit menu.

          */

         private JMenu createEditMenu() {

                 JMenu editMenu = new JMenu(i18n.get("menubar.edit"));

                 editMenu.setMnemonic(i18n.get("menubar.mnemo.edit").charAt(0));

                 JMenuItem mailsLocation = new JMenuItem(i18n.get("menubar.messages.location"));

                 mailsLocation.setMnemonic(i18n.get("menubar.mnemo.msglocation").charAt(0));

                 if (ArgsHandler.INSTANCE.memoryModeEnabled()) {

                         mailsLocation.setEnabled(false);

                 } else {

                         mailsLocation.addActionListener(new ActionListener() {

                                 @Override

                                 public void actionPerformed(ActionEvent e) {

                                         setChanged();

                                         notifyObservers();

                                 }

                         });

                 }

                 editMenu.add(mailsLocation);

                 return editMenu;

         }

         /**

          * Creates the help menu.

          * <p>

          * The help menu contains an "About" item, to display some software information.

          * </p>

          *

          * @return the newly created help menu.

          */

         private JMenu createHelpMenu() {

                 JMenu helpMenu = new JMenu(i18n.get("menubar.help"));

                 helpMenu.setMnemonic(i18n.get("menubar.mnemo.help").charAt(0));

                 JMenuItem about = new JMenuItem(i18n.get("menubar.about"));

                 about.setMnemonic(i18n.get("menubar.mnemo.about").charAt(0));

                 about.addActionListener(new ActionListener() {

                         @Override

                         public void actionPerformed(ActionEvent e) {

                                 // for copying style

                                 JLabel label = new JLabel();

                                 Font font = label.getFont();

                                 // create some css from the label's font

                                 StringBuffer style = new StringBuffer("font-family:")

                                         .append(font.getFamily()).append(";font-weight:");

                                 if (font.isBold()) {

                                         style.append("bold");

                                 } else {

                                         style.append("normal");

                                 }

                                 style.append(";font-size:").append(font.getSize()).append("pt;");

                                 // html content

                                 String link = i18n.get("menubar.about.dialog.link");

                                 JEditorPane ep = new JEditorPane("text/html",

                                                 String.format("<html><body style=\"%s\">%s<br /><a href=\"%s\">%s</a></body></html>",

                                                                 style, i18n.get("menubar.about.dialog"), link, link));

                                 // handle link events

                                 ep.addHyperlinkListener(new HyperlinkListener() {

                                         @Override

                                         public void hyperlinkUpdate(HyperlinkEvent e) {

                                                 if (e.getEventType().equals(HyperlinkEvent.EventType.ACTIVATED)) {

                                                         MenuBar.launchUrl(e.getURL().toString());

                                                 }

                                         }

                                 });

                                 ep.setEditable(false);

                                 ep.setBackground(label.getBackground());

                                 // show

                                 JOptionPane.showMessageDialog(menuBar.getParent(), ep, String.format(i18n.get("menubar.about.title"),

                                                 Configuration.INSTANCE.get("application.name")), JOptionPane.INFORMATION_MESSAGE);

                         }

                 });

                 helpMenu.add(about);

                 return helpMenu;

         }

         /**

          * Opens a web browser to launch the url specified in parameters.

          *

          * @param url the URL to launch.

          */

         private static void launchUrl(String url) {

                 if (Desktop.isDesktopSupported()) {

                         try {

                                 Desktop desktop = Desktop.getDesktop();

                                 if (desktop != null && desktop.isSupported(Desktop.Action.BROWSE)) {

                                         desktop.browse(new URI(url));

                                 }

                         } catch (Exception e) {

                                 LOGGER.error("", e);

                         }

                 }

         }

 }