/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at legal-notices/CDDLv1_0.txt
 * or http://forgerock.org/license/CDDLv1.0.html.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at legal-notices/CDDLv1_0.txt.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information:
 *      Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 *
 *
 *      Copyright 2009 Sun Microsystems, Inc.
 *      Portions Copyright 2015 ForgeRock AS.
 */
package org.opends.guitools.controlpanel.ui;

import static org.opends.messages.AdminToolMessages.*;

import java.awt.Component;
import java.awt.GridBagConstraints;
import java.util.ArrayList;
import java.util.List;

import javax.swing.Box;
import javax.swing.JLabel;

import org.opends.guitools.controlpanel.datamodel.CustomSearchResult;
import org.opends.guitools.controlpanel.datamodel.BasicMonitoringAttributes;
import org.opends.guitools.controlpanel.datamodel.MonitoringAttributes;
import org.opends.guitools.controlpanel.datamodel.ServerDescriptor;
import org.opends.guitools.controlpanel.util.Utilities;

/**
 * The panel displaying the system information monitoring panel.
 */
public class SystemInformationMonitoringPanel extends GeneralMonitoringPanel
{
  private static final long serialVersionUID = 9031734563298069830L;
  static List<MonitoringAttributes> operations = new ArrayList<>();
  {
    operations.add(BasicMonitoringAttributes.SYSTEM_NAME);
    operations.add(BasicMonitoringAttributes.OPERATING_SYSTEM);
    operations.add(BasicMonitoringAttributes.AVAILABLE_CPUS);
    operations.add(BasicMonitoringAttributes.USED_MEMORY);
    operations.add(BasicMonitoringAttributes.FREE_USED_MEMORY);
    operations.add(BasicMonitoringAttributes.MAX_MEMORY);
  }
  private ArrayList<JLabel> monitoringLabels = new ArrayList<>();
  {
    for (int i=0; i<operations.size(); i++)
    {
      monitoringLabels.add(Utilities.createDefaultLabel());
    }
  }

  /**
   * Default constructor.
   */
  public SystemInformationMonitoringPanel()
  {
    super();
    createLayout();
  }

  /** {@inheritDoc} */
  public Component getPreferredFocusComponent()
  {
    return monitoringLabels.get(0);
  }

  /**
   * Creates the layout of the panel (but the contents are not populated here).
   */
  private void createLayout()
  {
    GridBagConstraints gbc = new GridBagConstraints();
    JLabel lTitle = Utilities.createTitleLabel(
        INFO_CTRL_PANEL_SYSTEM_INFORMATION.get());
    gbc.fill = GridBagConstraints.NONE;
    gbc.anchor = GridBagConstraints.WEST;
    gbc.gridwidth = 2;
    gbc.gridx = 0;
    gbc.gridy = 0;
    gbc.insets.top = 5;
    gbc.insets.bottom = 7;
    add(lTitle, gbc);

    gbc.insets.bottom = 0;
    gbc.insets.top = 10;
    gbc.gridy ++;
    gbc.anchor = GridBagConstraints.WEST;
    gbc.gridwidth = 1;
    for (int i=0; i<operations.size(); i++)
    {
      JLabel l = Utilities.createPrimaryLabel(getLabel(operations.get(i)));
      gbc.gridy ++;
      gbc.insets.left = 0;
      gbc.gridx = 0;
      gbc.weightx = 0.0;
      gbc.gridwidth = 1;
      add(l, gbc);
      gbc.insets.left = 10;
      gbc.gridx = 1;
      gbc.gridwidth = 2;
      add(monitoringLabels.get(i), gbc);
    }

    gbc.gridx = 0;
    gbc.gridy ++;
    gbc.fill = GridBagConstraints.BOTH;
    gbc.weightx = 1.0;
    gbc.weighty = 1.0;
    gbc.gridwidth = 3;
    add(Box.createGlue(), gbc);

    setBorder(PANEL_BORDER);
  }

  /**
   * Updates the contents of the panel.
   *
   */
  public void updateContents()
  {
    ServerDescriptor server = null;
    if (getInfo() != null)
    {
      server = getInfo().getServerDescriptor();
    }
    CustomSearchResult csr = null;
    if (server != null)
    {
      csr = server.getSystemInformationMonitor();
    }
    if (csr != null)
    {
      updateMonitoringInfo(operations, monitoringLabels, csr);
    }
    else
    {
      for (JLabel l : monitoringLabels)
      {
        l.setText(NO_VALUE_SET.toString());
      }
    }
  }
}