/**
    * Copyright 2011, Aiki IT, FotoRenamer
    * <p/>
    * Licensed under the Apache License, Version 2.0 (the "License");
    * you may not use this file except in compliance with the License.
    * You may obtain a copy of the License at
    * <p/>
    * http://www.apache.org/licenses/LICENSE-2.0
    * <p/>
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package de.aikiit.fotorenamer.gui;
  
  import de.aikiit.fotorenamer.exception.InvalidDirectoryException;
  import de.aikiit.fotorenamer.exception.NoFilesFoundException;
  import de.aikiit.fotorenamer.image.CreationDateFromExifImageRenamer;
  import de.aikiit.fotorenamer.image.RemoveExifPrefixRenamer;
  import de.aikiit.fotorenamer.util.ComponentGaugeUtil;
  import de.aikiit.fotorenamer.util.Version;
  import org.apache.logging.log4j.LogManager;
  import org.apache.logging.log4j.Logger;
  
  import javax.swing.*;
  import java.awt.*;
  import java.awt.event.ActionEvent;
  import java.awt.event.ActionListener;
  import java.io.File;
  import java.text.SimpleDateFormat;
  import java.util.Date;
  
  import static de.aikiit.fotorenamer.util.LocalizationHelper.getBundleString;
  import static de.aikiit.fotorenamer.util.LocalizationHelper.getParameterizedBundleString;
  
  /**
   * This class holds the main application window and allows to select a directory
   * to perform the image name processing.
   *
   * @author hirsch, 13.10.2003
   * @version 2004-01-08
   */
  public final class MainUIWindow extends JFrame implements ActionListener {
      /**
       * The logger of this class.
       **/
      private static final Logger LOG =
              LogManager.getLogger(MainUIWindow.class);
  
      /**
       * Provide version information in the UI (taken from maven).
       */
      private static final String VERSION = getParameterizedBundleString("fotorenamer.ui.main.version", //
              new SimpleDateFormat(getBundleString("fotorenamer.datepattern")).
                      format(new Date(Long.parseLong(
                              Version.TIMESTAMP))), //
              Version.VERSION, //
              Version.TIMESTAMP
      );
      /**
       * Relative location of the UI's image icon.
       */
      private static final String IMAGE_LOCATION =
              File.separator + "image" + File.separator + "miniCamera.png";
  
      /**
       * Component containing the help window of this application.
       */
      private static final HelpWindow helpWindow = new HelpWindow();
      /**
       * The UI's help button.
       */
      private JButton helpButton = null;
      /**
       * The UI's start button.
       */
      private JButton goButton = null;
      /**
       * The UI's exit button.
       */
      private JButton endButton = null;
      /**
       * The UI's info/versioning button.
       */
      private JButton infoButton = null;
      /**
       * The UI's revert renaming button.
       */
      private JButton revertButton = null;
      /**
       * Component that selects the directory to work on.
       */
      private ImageDirectorySelector imageDirectorySelector = null;
  
      private MainUIWindow() {
          SwingUtilities.invokeLater(this::init);
      }
 
     /**
      * Creates the main UI window and initializes all internal UI-components.
      */
     public static void build() {
         new MainUIWindow();
     }
 
     /**
      * Helper class to perform the internal initialization of the UI.
      */
     private void init() {
         String os = "[" + System.getProperty("os.name");
         os += " " + System.getProperty("os.version");
         os += " " + System.getProperty("os.arch") + "]";
 
         this.setTitle(getParameterizedBundleString("fotorenamer.ui.main.title", os));
         this.getContentPane().setLayout(new BorderLayout());
         this.setDefaultCloseOperation(EXIT_ON_CLOSE);
 
         // select directory
         JPanel verzeichnis = new JPanel(new BorderLayout());
         this.imageDirectorySelector = new ImageDirectorySelector(
                 ComponentGaugeUtil.createImageIcon(IMAGE_LOCATION));
         verzeichnis.add(imageDirectorySelector);
 
         // help
         JPanel knoepfe = new JPanel(new FlowLayout());
         this.helpButton = new JButton(getBundleString("fotorenamer.ui.main.menu.help"));
         this.helpButton.addActionListener(this);
         this.helpButton.setMnemonic(getBundleString("fotorenamer.ui.main.menu.help.mnemonic").charAt(0));
         knoepfe.add(this.helpButton);
 
         // info
         this.infoButton = new JButton(getBundleString("fotorenamer.ui.main.menu.info"));
         this.infoButton.addActionListener(this);
         this.infoButton.setMnemonic(getBundleString("fotorenamer.ui.main.menu.info.mnemonic").charAt(0));
         knoepfe.add(this.infoButton);
 
         // exit
         this.endButton = new JButton(getBundleString("fotorenamer.ui.main.menu.end"));
         this.endButton.addActionListener(this);
         this.endButton.setMnemonic(getBundleString("fotorenamer.ui.main.menu.end.mnemonic").charAt(0));
         knoepfe.add(this.endButton);
 
         // start
         this.goButton = new JButton(getBundleString("fotorenamer.ui.main.menu.start"));
         this.goButton.addActionListener(this);
         this.goButton.setMnemonic(getBundleString("fotorenamer.ui.main.menu.start.mnemonic").charAt(0));
         knoepfe.add(this.goButton);
 
         // revert
         this.revertButton = new JButton(getBundleString("fotorenamer.ui.main.menu.revert"));
         this.revertButton.addActionListener(this);
         this.revertButton.setMnemonic(getBundleString("fotorenamer.ui.main.menu.revert.mnemonic").charAt(0));
         knoepfe.add(this.revertButton);
 
         this.getContentPane().add(verzeichnis, BorderLayout.NORTH);
         this.getContentPane().add(knoepfe, BorderLayout.CENTER);
         this.pack();
         ComponentGaugeUtil.makeCentered(this);
         this.setVisible(true);
     }
 
     /**
      * Action listener method to react on events.
      *
      * @param event Events that was fired on this component.
      */
     public void actionPerformed(final ActionEvent event) {
         final SwingWorker<Void, Void> worker;
 
         Object source = event.getSource();
         // end
         if (this.endButton.equals(source)) {
             LOG.info("Bye Bye :-)");
             System.exit(0);
         } else if (this.helpButton.equals(source)) {
             LOG.info("Displaying help window.");
             showHelpWindow();
         } else if (this.infoButton.equals(source)) {
             // info
             JOptionPane.showMessageDialog(null,
                     getParameterizedBundleString("fotorenamer.ui.about", VERSION, new SimpleDateFormat("yyyy").
                             format(new Date(
                                     Long.parseLong(
                                             Version.TIMESTAMP)))),
                     getBundleString("fotorenamer.ui.main.version.title"),
                     JOptionPane.INFORMATION_MESSAGE);
         } else if (this.revertButton.equals(source) || this.goButton.equals(source)) {
             worker = new SwingWorker<Void, Void>() {
                 @Override
                 protected Void doInBackground() {
                     if (imageDirectorySelector.isWaiting()) {
                         JOptionPane.showMessageDialog(null,
                                 getBundleString("fotorenamer.ui.error.nodirectory"),
                                 getBundleString("fotorenamer.ui.error.nodirectory.title"),
                                 JOptionPane.ERROR_MESSAGE);
                         return null;
                     }
 
                     // perform renaming
                     try {
                         if (goButton.equals(source)) {
                             goButton.setEnabled(false);
                             goButton.setText(getBundleString("fotorenamer.ui.main.progress"));
                             CreationDateFromExifImageRenamer renamer =
                                     new CreationDateFromExifImageRenamer(
                                             imageDirectorySelector.getSelectedDirectory()
                                     );
                             new Thread(renamer).start();
                         } else {
                             revertButton.setEnabled(false);
                             revertButton.setText(getBundleString("fotorenamer.ui.main.progress"));
                             new RemoveExifPrefixRenamer(
                                     imageDirectorySelector.getSelectedDirectory());
                         }
                     } catch (InvalidDirectoryException uv) {
                         LOG.info("Invalid directory selected: {}", uv.getMessage());
                         JOptionPane.showMessageDialog(null,
                                 getParameterizedBundleString("fotorenamer.ui.error.invaliddirectory", uv.getMessage()),
                                 getBundleString("fotorenamer.ui.error.invaliddirectory.title"),
                                 JOptionPane.ERROR_MESSAGE);
                     } catch (NoFilesFoundException kde) {
                         LOG.info("No files found in {}", kde.getMessage());
                         JOptionPane.showMessageDialog(null,
                                 getParameterizedBundleString("fotorenamer.ui.error.nofiles", kde.getMessage()),
                                 getBundleString("fotorenamer.ui.error.nofiles.title"),
                                 JOptionPane.ERROR_MESSAGE);
                     }
                     return null;
                 }
 
                 @Override
                 protected void done() {
                     LOG.debug("Finished working, will reset UI.");
                     // reset gui if all workers terminated
                     goButton.setEnabled(true);
                     goButton.setText(getBundleString("fotorenamer.ui.main.menu.start"));
                     revertButton.setEnabled(true);
                     revertButton.setText(getBundleString("fotorenamer.ui.main.menu.revert"));
                 }
             };
             // Execute the SwingWorker; GUI will not freeze
             worker.execute();
         }
     }
 
     /**
      * Helper to enable visibility of help window.
      *
      * @see HelpWindow
      */
     private static void showHelpWindow() {
         helpWindow.setVisible(true);
     }
 }