/*
    * Licensed to the Apache Software Foundation (ASF) under one or more
    * contributor license agreements. See the NOTICE file distributed with
    * this work for additional information regarding copyright ownership.
    * The ASF licenses this file to You 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
    *
    *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * 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 org.apache.logging.log4j.core.jmx;
  
  import java.awt.BorderLayout;
  import java.awt.Color;
  import java.awt.Dimension;
  import java.awt.Font;
  import java.awt.event.ActionEvent;
  import java.io.PrintWriter;
  import java.io.StringWriter;
  
  import javax.swing.AbstractAction;
  import javax.swing.Box;
  import javax.swing.BoxLayout;
  import javax.swing.JButton;
  import javax.swing.JLabel;
  import javax.swing.JOptionPane;
  import javax.swing.JPanel;
  import javax.swing.JScrollPane;
  import javax.swing.JTextArea;
  import javax.swing.JTextField;
  
  /**
   * Panel for editing Log4J configurations.
   */
  public class ClientEditConfigPanel extends JPanel {
      private static final long serialVersionUID = -7544651740950723394L;
      private static final int LOCATION_TEXT_COLS = 50;
      private static final int CONFIG_TEXT_COLS = 60;
      private static final int CONFIG_TEXT_ROWS = 20;
      private static final int BUFFER_SIZE = 2048;
      
      private JTextField locationTextField;
      private JLabel locationLabel;
      private JButton buttonSendLocation;
      private JButton buttonSendConfigText;
      private JTextArea configTextArea;
      private LoggerContextAdminMBean contextAdmin;
  
      private AbstractAction actionReconfigureFromLocation = new AbstractAction(
              "Reconfigure from Location") {
          private static final long serialVersionUID = 6995219797596745774L;
  
          @Override
          public void actionPerformed(ActionEvent e) {
              try {
                  contextAdmin.setConfigLocationURI(locationTextField.getText());
                  populateWidgets();
                  showConfirmation();
              } catch (Exception ex) {
                  populateWidgets();
                  handle("Could not reconfigure from location", ex);
              }
          }
      };
      private AbstractAction actionReconfigureFromText = new AbstractAction(
              "Reconfigure with XML Below") {
          private static final long serialVersionUID = -2846103707134292312L;
  
          @Override
          public void actionPerformed(ActionEvent e) {
              String encoding = System.getProperty("file.encoding");
              try {
                  contextAdmin.setConfigText(configTextArea.getText(), encoding);
                  populateWidgets();
                  showConfirmation();
              } catch (Exception ex) {
                  populateWidgets();
                  handle("Could not reconfigure from XML", ex);
              }
          }
      };
  
      private void handle(String msg, Exception ex) {
          StringWriter sr = new StringWriter(BUFFER_SIZE);
          PrintWriter pw = new PrintWriter(sr);
          pw.println("Please check the StatusLogger tab for details");
          pw.println();
          ex.printStackTrace(pw);
          JOptionPane.showMessageDialog(this, sr.toString(), msg,
                  JOptionPane.ERROR_MESSAGE);
      }
  
      private void showConfirmation() {
         JOptionPane.showMessageDialog(this, "Reconfiguration complete.",
                 "Reconfiguration complete", JOptionPane.INFORMATION_MESSAGE);
     }
 
     public ClientEditConfigPanel(LoggerContextAdminMBean contextAdmin) {
         this.contextAdmin = contextAdmin;
         createWidgets();
         populateWidgets();
     }
 
     private void populateWidgets() {
         try {
             configTextArea.setText(contextAdmin.getConfigText());
         } catch (Exception ex) {
             StringWriter sw = new StringWriter(2048);
             ex.printStackTrace(new PrintWriter(sw));
             configTextArea.setText(sw.toString());
         }
         String uri = contextAdmin.getConfigLocationURI();
         locationTextField.setText(uri);
     }
 
     private void createWidgets() {
         configTextArea = new JTextArea(CONFIG_TEXT_ROWS, CONFIG_TEXT_COLS);
         // configTextArea.setEditable(false);
         configTextArea.setBackground(Color.white);
         configTextArea.setForeground(Color.black);
         configTextArea.setFont(new Font("Monospaced", Font.PLAIN,
                 configTextArea.getFont().getSize()));
         JScrollPane scrollConfig = new JScrollPane(configTextArea);
 
         locationTextField = new JTextField(LOCATION_TEXT_COLS);
         locationLabel = new JLabel("Location: ");
         locationLabel.setLabelFor(locationTextField);
         buttonSendLocation = new JButton(actionReconfigureFromLocation);
         buttonSendConfigText = new JButton(actionReconfigureFromText);
 
         JPanel north = new JPanel();
         north.setLayout(new BoxLayout(north, BoxLayout.LINE_AXIS));
         north.add(locationLabel);
         north.add(locationTextField);
         north.add(buttonSendLocation);
         north.add(Box.createRigidArea(new Dimension(20, 0)));
         north.add(buttonSendConfigText);
 
         this.setLayout(new BorderLayout());
         this.add(north, BorderLayout.NORTH);
         this.add(scrollConfig, BorderLayout.CENTER);
     }
 }