/**
    * SpamSchutz - simple way to protect your mail addresses from naïve spammers
    * Copyright (C) 2011, Aiki IT
    * <p/>
    * This program is free software: you can redistribute it and/or modify
    * it under the terms of the GNU General Public License as published by
    * the Free Software Foundation, either version 3 of the License, or
    * (at your option) any later version.
    * <p/>
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   * <p/>
   * You should have received a copy of the GNU General Public License
   * along with this program.  If not, see <http://www.gnu.org/licenses/>.
   */
  package de.aikiit.spamprotector;
  
  import com.google.common.annotations.VisibleForTesting;
  import de.aikiit.spamprotector.converter.SpamProtector;
  
  import javax.swing.JButton;
  import javax.swing.JLabel;
  import javax.swing.JOptionPane;
  import javax.swing.JPanel;
  import javax.swing.JTextField;
  import javax.swing.SwingUtilities;
  import java.awt.BorderLayout;
  import java.awt.Dimension;
  import java.awt.FlowLayout;
  import java.time.LocalDate;
  
  import static de.aikiit.spamprotector.util.LocalizationHelper.getBundleString;
  import static de.aikiit.spamprotector.util.LocalizationHelper.getParameterizedBundleString;
  
  /**
   * This class contains the main UI of this application (both input windows
   * and all command buttons).
   */
  class GUI extends JPanel {
  
      /**
       * Constant to define the dimension of a text box.
       */
      private static final Dimension BOX_DIMENSION = new Dimension(300, 200);
  
      @VisibleForTesting
      static final LocalDate now = LocalDate.now();
  
      /**
       * Launches and configures the main UI component.
       */
      GUI() {
          SwingUtilities.invokeLater(this::init);
      }
  
      /**
       * Internal helper to initialize the UI depending on the surrounding this
       * application is started.
       */
      private void init() {
          // command help
          final JPanel buttonArea = new JPanel();
          JButton help = new JButton(getBundleString("spamschutz.ui.help"));
          help.setMnemonic(getBundleString("spamschutz.ui.help.mnemonic").charAt(0));
          help.addActionListener(e -> JOptionPane.showMessageDialog(null, getParameterizedBundleString("spamschutz.ui.help.text",
                          String.valueOf(now.getYear()),
                          de.aikiit.spamprotector.util.Version.VERSION),
                  getBundleString("spamschutz.ui.help.title"),
                  JOptionPane.INFORMATION_MESSAGE));
  
          final JTextField input = new JTextField();
          input.setSize(BOX_DIMENSION);
          input.setPreferredSize(BOX_DIMENSION);
          final JTextField output = new JTextField(getBundleString("spamschutz.ui.default.output"));
          output.setSize(BOX_DIMENSION);
          output.setPreferredSize(BOX_DIMENSION);
  
          // read input field
          final JButton start = new JButton(getBundleString("spamschutz.ui.button.rtl"));
          start.setMnemonic(getBundleString("spamschutz.ui.button.rtl.mnemonic").charAt(0));
          start.addActionListener(e -> output.setText(SpamProtector.toEncoded(input.getText())));
  
          // read output field
          final JButton revert = new JButton(getBundleString("spamschutz.ui.button.ltr"));
          revert.setMnemonic(getBundleString("spamschutz.ui.button.ltr.mnemonic").charAt(0));
          revert.addActionListener(e -> input.setText(SpamProtector.toPlain(output.getText())));
  
          final JButton reset = new JButton(getBundleString("spamschutz.ui.reset"));
          reset.setMnemonic(getBundleString("spamschutz.ui.reset.mnemonic").charAt(0));
          reset.addActionListener(e -> {
              input.setText("");
              output.setText("");
          });
  
          buttonArea.add(revert);
          buttonArea.add(start);
          buttonArea.add(reset);
 
         // fields
         final JPanel ioArea = new JPanel(new FlowLayout());
 
         final JLabel inputLabel = new JLabel(getBundleString("spamschutz.ui.input"));
         inputLabel.setDisplayedMnemonic(getBundleString("spamschutz.ui.input.mnemonic").charAt(0));
         inputLabel.setLabelFor(input);
         ioArea.add(inputLabel);
         ioArea.add(input);
 
         final JLabel outputLabel = new JLabel(getBundleString("spamschutz.ui.output"));
         outputLabel.setDisplayedMnemonic(getBundleString("spamschutz.ui.output.mnemonic").charAt(0));
         outputLabel.setLabelFor(output);
         ioArea.add(outputLabel);
         ioArea.add(output);
 
         // window layout
         this.setLayout(new BorderLayout());
         this.add(buttonArea, BorderLayout.NORTH);
         this.add(ioArea, BorderLayout.CENTER);
 
         final JButton end = new JButton(getBundleString("spamschutz.ui.end"));
         end.setMnemonic(getBundleString("spamschutz.ui.end.mnemonic").charAt(0));
         end.addActionListener(e -> System.exit(0));
         buttonArea.add(end);
         buttonArea.add(help);
         this.setVisible(true);
     }
 }