package com.nilhcem.fakesmtp.gui;
   
   import com.nilhcem.fakesmtp.core.ArgsHandler;
   import com.nilhcem.fakesmtp.core.I18n;
   import com.nilhcem.fakesmtp.gui.listeners.AboutActionListener;
   import com.nilhcem.fakesmtp.gui.listeners.ExitActionListener;
   
   import javax.swing.JMenu;
   import javax.swing.JMenuBar;
  import javax.swing.JMenuItem;
  import java.awt.event.ActionEvent;
  import java.awt.event.ActionListener;
  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 final MainFrame mainFrame;
  
  	/**
  	 * Creates the menu bar and the different menus (file / edit / help).
  	 *
  	 * @param mainFrame MainFrame class required for the closing action.
  	 */
  	public MenuBar(MainFrame mainFrame) {
  		this.mainFrame = mainFrame;
  
  		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 ExitActionListener(mainFrame));
  
  		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 AboutActionListener(menuBar.getParent()));
 
 		helpMenu.add(about);
 		return helpMenu;
 	}
 }