package com.nilhcem.fakesmtp;

 import java.awt.EventQueue;

 import java.awt.Toolkit;

 import java.net.InetAddress;

 import java.net.URL;

 import java.net.UnknownHostException;

 import javax.swing.UIManager;

 import org.apache.commons.cli.ParseException;

 import org.slf4j.Logger;

 import org.slf4j.LoggerFactory;

 import com.apple.eawt.Application;

 import com.nilhcem.fakesmtp.core.ArgsHandler;

 import com.nilhcem.fakesmtp.core.Configuration;

 import com.nilhcem.fakesmtp.core.exception.UncaughtExceptionHandler;

 import com.nilhcem.fakesmtp.gui.MainFrame;

 import com.nilhcem.fakesmtp.server.SMTPServerHandler;

 /**

  * Entry point of the application.

  *

  * @author Nilhcem

  * @since 1.0

  */

 public final class FakeSMTP {

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

         private FakeSMTP() {

                 throw new UnsupportedOperationException();

         }

         /**

          * Checks command line arguments, sets some specific properties, and runs the main window.

          * <p>

          * Before opening the main window, this method will:

      * </p>

          * <ul>

          *   <li>check command line arguments, and possibly display an error dialog,</li>

          *   <li>set a default uncaught exception handler to intercept every uncaught exception;</li>

          *   <li>use a custom icon in the Mac Dock;</li>

          *   <li>set a property for Mac OS X to take the menu bar off the JFrame;</li>

          *   <li>set a property for Mac OS X to set the name of the application menu item;</li>

          *   <li>turn off the bold font in all components for swing default theme;</li>

          *   <li>use the platform look and feel.</li>

          * </ul>

          *

          * @param args a list of command line parameters.

          */

         public static void main(final String[] args) {

                 try {

                         ArgsHandler.INSTANCE.handleArgs(args);

                 } catch (ParseException e) {

                         ArgsHandler.INSTANCE.displayUsage();

                         return;

                 }

                 if (ArgsHandler.INSTANCE.shouldStartInBackground()) {

                         try {

                                 SMTPServerHandler.INSTANCE.startServer(getPort(), getBindAddress());

                         } catch (NumberFormatException e) {

                                 LOGGER.error("Error: Invalid port number", e);

                         } catch (UnknownHostException e) {

                                 LOGGER.error("Error: Invalid bind address", e);

                         } catch (Exception e) {

                                 LOGGER.error("Failed to auto-start server in background", e);

                         }

                 } else {

             System.setProperty("mail.mime.decodetext.strict", "false");

             Thread.setDefaultUncaughtExceptionHandler(new UncaughtExceptionHandler());

             EventQueue.invokeLater(new Runnable() {

                                 @Override

                                 public void run() {

                                         try {

                                                 URL envelopeImage = getClass().getResource(Configuration.INSTANCE.get("application.icon.path"));

                                                 if (envelopeImage != null) {

                                                         Application.getApplication().setDockIconImage(Toolkit.getDefaultToolkit().getImage(envelopeImage));

                                                 }

                                         } 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);

                                         }

                                         System.setProperty("apple.laf.useScreenMenuBar", "true");

                                         System.setProperty("com.apple.mrj.application.apple.menu.about.name", Configuration.INSTANCE.get("application.name"));

                                         UIManager.put("swing.boldMetal", Boolean.FALSE);

                                         try {

                                                 UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());

                                         } catch (Exception e) {

                                                 LOGGER.error("", e);

                                         }

                                         new MainFrame();

                                 }

                         });

                 }

         }

         /**

          * @return either the default port, or the custom port, if specified.

          * @throws NumberFormatException if the specified port cannot be parsed to an integer.

          */

         private static int getPort() throws NumberFormatException {

                 String portStr = ArgsHandler.INSTANCE.getPort();

                 if (portStr == null) {

                         portStr = Configuration.INSTANCE.get("smtp.default.port");

                 }

                 return Integer.parseInt(portStr);

         }

         /**

          * @return an InetAddress representing the specified bind address, or null, if not specified

          * @throws UnknownHostException if the bind address is invalid

          */

         private static InetAddress getBindAddress() throws UnknownHostException {

                 String bindAddressStr = ArgsHandler.INSTANCE.getBindAddress();

                 if (bindAddressStr == null || bindAddressStr.isEmpty()) {

                         return null;

                 }

                 return InetAddress.getByName(bindAddressStr);

         }

 }