/*
 * The contents of this file are subject to the terms of the Common Development and
 * Distribution License (the License). You may not use this file except in compliance with the
 * License.
 *
 * You can obtain a copy of the License at legal/CDDLv1.0.txt. See the License for the
 * specific language governing permission and limitations under the License.
 *
 * When distributing Covered Software, include this CDDL Header Notice in each file and include
 * the License file at legal/CDDLv1.0.txt. If applicable, add the following below the CDDL
 * Header, with the fields enclosed by brackets [] replaced by your own identifying
 * information: "Portions Copyright [year] [name of copyright owner]".
 *
 * Copyright 2006-2010 Sun Microsystems, Inc.
 * Portions Copyright 2014-2015 ForgeRock AS.
 */
package org.opends.quicksetup.installer.ui;

import java.awt.Component;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.FocusEvent;
import java.awt.event.FocusListener;
import java.io.File;
import java.util.HashMap;

import javax.swing.Box;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.text.JTextComponent;

import org.opends.quicksetup.event.BrowseActionListener;
import org.opends.quicksetup.ui.FieldName;
import org.opends.quicksetup.ui.GuiApplication;
import org.opends.quicksetup.ui.LabelFieldDescriptor;
import org.opends.quicksetup.ui.QuickSetupStepPanel;
import org.opends.quicksetup.ui.UIFactory;
import org.opends.quicksetup.util.Utils;
import org.opends.quicksetup.SecurityOptions;
import org.opends.quicksetup.UserData;

import org.opends.server.util.CertificateManager;
import org.forgerock.i18n.LocalizableMessage;
import static org.opends.messages.QuickSetupMessages.*;

/**
 * This is the panel that contains the Server Settings: the port, the Directory
 * Manager DN, etc.
 *
 */
public class ServerSettingsPanel extends QuickSetupStepPanel
{
  private UserData defaultUserData;

  private Component lastFocusComponent;
  private JLabel lSecurity;
  private JButton secureAccessButton;
  private JButton browseButton;

  private boolean canUpdateSecurity;

  private SecurityOptions securityOptions;

  private HashMap<FieldName, JLabel> hmLabels = new HashMap<>();
  private HashMap<FieldName, JTextComponent> hmFields = new HashMap<>();

  private JTextComponent tfServerLocationParent;
  private JTextComponent tfServerLocationRelativePath;

  private JLabel lServerLocation;

  private SecurityOptionsDialog dlg;

  private static final long serialVersionUID = -15911406930993035L;

  /**
   * Constructor of the panel.
   * @param application Application this panel represents
   * the fields of the panel.
   */
  public ServerSettingsPanel(GuiApplication application)
  {
    super(application);
    this.defaultUserData = application.getUserData();
    canUpdateSecurity = CertificateManager.mayUseCertificateManager();
    securityOptions = defaultUserData.getSecurityOptions();
    populateLabelAndFieldMaps();
    addFocusListeners();
  }

  /** {@inheritDoc} */
  public Object getFieldValue(FieldName fieldName)
  {
    Object value = null;

    if (fieldName == FieldName.SERVER_LOCATION)
    {
      String parent = tfServerLocationParent.getText();
      String relative = tfServerLocationRelativePath.getText();
      if (parent != null && parent.length() > 0)
      {
        value = parent;
      }
      if (relative != null && relative.length() > 0)
      {
        if (value == null)
        {
          value = File.separator + relative;
        } else
        {
          value = value + File.separator + relative;
        }
      }

    }
    else if (fieldName == FieldName.SECURITY_OPTIONS)
    {
      value = securityOptions;
    }
    else
    {
      JTextComponent field = getField(fieldName);
      if (field != null)
      {
        value = field.getText();
      }
    }

    return value;
  }

  /** {@inheritDoc} */
  public void displayFieldInvalid(FieldName fieldName, boolean invalid)
  {
    JLabel label = getLabel(fieldName);
    if (label != null)
    {
      if (invalid)
      {
        UIFactory.setTextStyle(label,
            UIFactory.TextStyle.PRIMARY_FIELD_INVALID);
      } else
      {
        UIFactory
            .setTextStyle(label, UIFactory.TextStyle.PRIMARY_FIELD_VALID);
      }
    }
  }

  /** {@inheritDoc} */
  protected Component createInputPanel()
  {
    JPanel panel = new JPanel(new GridBagLayout());
    panel.setOpaque(false);

    GridBagConstraints gbc = new GridBagConstraints();

    FieldName[] fieldNames =
    {
        FieldName.HOST_NAME,
        FieldName.SERVER_PORT,
        FieldName.ADMIN_CONNECTOR_PORT,
        FieldName.SECURITY_OPTIONS,
        FieldName.DIRECTORY_MANAGER_DN,
        FieldName.DIRECTORY_MANAGER_PWD,
        FieldName.DIRECTORY_MANAGER_PWD_CONFIRM
    };


    // Add widgets
    for (FieldName fieldName : fieldNames) {
      gbc.gridwidth = GridBagConstraints.RELATIVE;
      gbc.weightx = 0.0;
      gbc.insets.top = UIFactory.TOP_INSET_PRIMARY_FIELD;
      gbc.insets.left = 0;
      boolean isSecurityField = fieldName == FieldName.SECURITY_OPTIONS;

      int securityInsetsTop = Math.abs(
          getLDAPSecureAccessButton().getPreferredSize().height -
          getLabel(fieldName).getPreferredSize().height) / 2;

      if (isSecurityField)
      {
        gbc.anchor = GridBagConstraints.NORTHWEST;
        gbc.insets.top += securityInsetsTop;
      }
      else
      {
        gbc.anchor = GridBagConstraints.WEST;
      }
      panel.add(getLabel(fieldName), gbc);

      final JPanel auxPanel = new JPanel(new GridBagLayout());
      auxPanel.setOpaque(false);
      gbc.weightx = 1.0;
      gbc.fill = GridBagConstraints.HORIZONTAL;
      gbc.insets.top = UIFactory.TOP_INSET_PRIMARY_FIELD;
      gbc.insets.left = UIFactory.LEFT_INSET_PRIMARY_FIELD;
      gbc.gridwidth = GridBagConstraints.REMAINDER;

      panel.add(auxPanel, gbc);

      boolean isPortField = fieldName == FieldName.SERVER_PORT;
      boolean isAdminConnectorPortField =
        fieldName == FieldName.ADMIN_CONNECTOR_PORT;
      gbc.insets = UIFactory.getEmptyInsets();
      if (isPortField || isAdminConnectorPortField ||
          (isSecurityField && canUpdateSecurity))
      {
        gbc.gridwidth = 3;
      }
      else
      {
        gbc.gridwidth = GridBagConstraints.RELATIVE;
      }
      gbc.weightx = 0.0;
      if (isSecurityField)
      {
        gbc.insets.top = securityInsetsTop;
        if (canUpdateSecurity)
        {
          auxPanel.add(lSecurity, gbc);
        }
        else
        {
          auxPanel.add(UIFactory.makeJLabel(UIFactory.IconType.WARNING,
              INFO_CANNOT_UPDATE_SECURITY_WARNING.get(),
              UIFactory.TextStyle.SECONDARY_FIELD_VALID), gbc);
        }
      }
      else
      {
        auxPanel.add(getField(fieldName), gbc);
      }

      if (isPortField)
      {
        JLabel l =
                UIFactory.makeJLabel(UIFactory.IconType.NO_ICON,
                        getPortHelpMessage(),
                        UIFactory.TextStyle.SECONDARY_FIELD_VALID);
        gbc.gridwidth = GridBagConstraints.RELATIVE;
        gbc.insets.left = UIFactory.LEFT_INSET_SECONDARY_FIELD;
        auxPanel.add(l, gbc);
      }
      else if (isAdminConnectorPortField)
      {
        JLabel l =
          UIFactory.makeJLabel(UIFactory.IconType.NO_ICON,
              getAdminConnectorPortHelpMessage(),
              UIFactory.TextStyle.SECONDARY_FIELD_VALID);
        gbc.gridwidth = GridBagConstraints.RELATIVE;
        gbc.insets.left = UIFactory.LEFT_INSET_SECONDARY_FIELD;
        auxPanel.add(l, gbc);
      }
      else if (isSecurityField && canUpdateSecurity)
      {
        gbc.gridwidth = GridBagConstraints.RELATIVE;
        gbc.insets.left = UIFactory.LEFT_INSET_BROWSE;
        gbc.anchor = GridBagConstraints.NORTHWEST;
        gbc.insets.top = 0;
        auxPanel.add(getLDAPSecureAccessButton(), gbc);
      }
      gbc.gridwidth = GridBagConstraints.REMAINDER;
      gbc.weightx = 1.0;
      gbc.fill = GridBagConstraints.HORIZONTAL;
      auxPanel.add(Box.createHorizontalGlue(), gbc);
    }
    addVerticalGlue(panel);
    return panel;
  }

  /** {@inheritDoc} */
  protected LocalizableMessage getInstructions()
  {
    return INFO_SERVER_SETTINGS_PANEL_INSTRUCTIONS.get();
  }

  /** {@inheritDoc} */
  protected LocalizableMessage getTitle()
  {
    return INFO_SERVER_SETTINGS_PANEL_TITLE.get();
  }

  /** {@inheritDoc} */
  public void endDisplay()
  {
    if (lastFocusComponent != null)
    {
      lastFocusComponent.requestFocusInWindow();
    }
  }

  /**
   * Returns the default value for the provided field Name.
   * @param fieldName the field name for which we want to get the default
   * value.
   * @return the default value for the provided field Name.
   */
  private String getDefaultValue(FieldName fieldName)
  {
    String value;
    value = null;
    switch (fieldName)
    {
    case SERVER_LOCATION:
      value = defaultUserData.getServerLocation();
      break;

    case HOST_NAME:
      value = defaultUserData.getHostName();
      break;

    case SERVER_PORT:
      if (defaultUserData.getServerPort() > 0)
      {
        value = String.valueOf(defaultUserData.getServerPort());
      }
      else
      {
        value = "";
      }
      break;

    case ADMIN_CONNECTOR_PORT:
      if (defaultUserData.getAdminConnectorPort() > 0)
      {
        value = String.valueOf(defaultUserData.getAdminConnectorPort());
      }
      else
      {
        value = "";
      }
      break;

    case DIRECTORY_MANAGER_DN:
      value = defaultUserData.getDirectoryManagerDn();
      break;

    case DIRECTORY_MANAGER_PWD:
      value = defaultUserData.getDirectoryManagerPwd();
      break;

    case DIRECTORY_MANAGER_PWD_CONFIRM:
      value = defaultUserData.getDirectoryManagerPwd();
      break;

    case SECURITY_OPTIONS:
      value = Utils.getSecurityOptionsString(
          defaultUserData.getSecurityOptions(),
          true);
      break;

    default:
      throw new IllegalArgumentException("Unknown field name: " +
          fieldName);
    }

    return value;
  }

  /**
   * Creates the components and populates the Maps with them.
   */
  private void populateLabelAndFieldMaps()
  {
    HashMap<FieldName, LabelFieldDescriptor> hm = new HashMap<>();

    hm.put(FieldName.HOST_NAME, new LabelFieldDescriptor(
        INFO_HOST_NAME_LABEL.get(),
        INFO_HOST_NAME_TOOLTIP.get(),
        LabelFieldDescriptor.FieldType.TEXTFIELD,
        LabelFieldDescriptor.LabelType.PRIMARY, UIFactory.HOST_FIELD_SIZE));

    hm.put(FieldName.SERVER_PORT, new LabelFieldDescriptor(
        INFO_SERVER_PORT_LABEL.get(),
        INFO_SERVER_PORT_TOOLTIP.get(),
        LabelFieldDescriptor.FieldType.TEXTFIELD,
        LabelFieldDescriptor.LabelType.PRIMARY, UIFactory.PORT_FIELD_SIZE));

    hm.put(FieldName.ADMIN_CONNECTOR_PORT, new LabelFieldDescriptor(
        INFO_ADMIN_CONNECTOR_PORT_LABEL.get(),
        INFO_ADMIN_CONNECTOR_PORT_TOOLTIP.get(),
        LabelFieldDescriptor.FieldType.TEXTFIELD,
        LabelFieldDescriptor.LabelType.PRIMARY, UIFactory.PORT_FIELD_SIZE));

    hm.put(FieldName.SECURITY_OPTIONS, new LabelFieldDescriptor(
        INFO_SERVER_SECURITY_LABEL.get(),
        INFO_SERVER_SECURITY_TOOLTIP.get(),
        LabelFieldDescriptor.FieldType.READ_ONLY,
        LabelFieldDescriptor.LabelType.PRIMARY, 0));

    hm.put(FieldName.DIRECTORY_MANAGER_DN, new LabelFieldDescriptor(
        INFO_SERVER_DIRECTORY_MANAGER_DN_LABEL.get(),
        INFO_SERVER_DIRECTORY_MANAGER_DN_TOOLTIP.get(),
        LabelFieldDescriptor.FieldType.TEXTFIELD,
        LabelFieldDescriptor.LabelType.PRIMARY, UIFactory.DN_FIELD_SIZE));

    hm.put(FieldName.DIRECTORY_MANAGER_PWD, new LabelFieldDescriptor(
        INFO_SERVER_DIRECTORY_MANAGER_PWD_LABEL.get(),
        INFO_SERVER_DIRECTORY_MANAGER_PWD_TOOLTIP.get(),
        LabelFieldDescriptor.FieldType.PASSWORD,
        LabelFieldDescriptor.LabelType.PRIMARY, UIFactory.PASSWORD_FIELD_SIZE));

    hm.put(FieldName.DIRECTORY_MANAGER_PWD_CONFIRM,
        new LabelFieldDescriptor(
        INFO_SERVER_DIRECTORY_MANAGER_PWD_CONFIRM_LABEL.get(),
        INFO_SERVER_DIRECTORY_MANAGER_PWD_CONFIRM_TOOLTIP.get(),
        LabelFieldDescriptor.FieldType.PASSWORD,
        LabelFieldDescriptor.LabelType.PRIMARY,
        UIFactory.PASSWORD_FIELD_SIZE));

    for (FieldName fieldName : hm.keySet())
    {
      LabelFieldDescriptor desc = hm.get(fieldName);
      String defaultValue = getDefaultValue(fieldName);

      JLabel label = UIFactory.makeJLabel(desc);

      if (fieldName != FieldName.SECURITY_OPTIONS)
      {
        JTextComponent field = UIFactory.makeJTextComponent(desc, defaultValue);
        hmFields.put(fieldName, field);
        label.setLabelFor(field);
      }
      else
      {
        lSecurity = UIFactory.makeJLabel(UIFactory.IconType.NO_ICON,
                LocalizableMessage.raw(defaultValue),
                UIFactory.TextStyle.SECONDARY_FIELD_VALID);
      }

      hmLabels.put(fieldName, label);
    }

    /* Create the elements for the location */
    LabelFieldDescriptor desc =
        new LabelFieldDescriptor(INFO_SERVER_LOCATION_LABEL.get(),
            INFO_SERVER_LOCATION_PARENT_TOOLTIP.get(),
            LabelFieldDescriptor.FieldType.TEXTFIELD,
            LabelFieldDescriptor.LabelType.PRIMARY, UIFactory.PATH_FIELD_SIZE);
    lServerLocation = UIFactory.makeJLabel(desc);
    tfServerLocationParent = UIFactory.makeJTextComponent(desc, "");
    lServerLocation.setLabelFor(tfServerLocationParent);
    hmLabels.put(FieldName.SERVER_LOCATION, lServerLocation);

    desc =
        new LabelFieldDescriptor(INFO_SERVER_LOCATION_LABEL.get(),
            INFO_SERVER_LOCATION_RELATIVE_TOOLTIP.get(),
            LabelFieldDescriptor.FieldType.TEXTFIELD,
            LabelFieldDescriptor.LabelType.PRIMARY,
            UIFactory.RELATIVE_PATH_FIELD_SIZE);
    tfServerLocationRelativePath = UIFactory.makeJTextComponent(desc, "");
    String defaultPath = getDefaultValue(FieldName.SERVER_LOCATION);
    if (defaultPath != null)
    {
      int index = defaultPath.lastIndexOf(File.separator);
      if (index != -1)
      {
        String parent = defaultPath.substring(0, index);
        String relativeDir = defaultPath.substring(index + 1);

        tfServerLocationParent.setText(parent);
        tfServerLocationRelativePath.setText(relativeDir);
      }
    }
  }

  /**
   * Returns the browse button.
   * If it does not exist creates the browse button.
   * @return the browse button.
   */
  private JButton getBrowseButton()
  {
    if (browseButton == null)
    {
      browseButton =
          UIFactory.makeJButton(INFO_BROWSE_BUTTON_LABEL.get(),
              INFO_BROWSE_BUTTON_TOOLTIP.get());

      BrowseActionListener l =
          new BrowseActionListener(tfServerLocationParent,
              BrowseActionListener.BrowseType.LOCATION_DIRECTORY,
              getMainWindow());
      browseButton.addActionListener(l);
    }
    return browseButton;
  }

  /**
   * Returns the configure secure access button.
   * If it does not exist creates the secure access button.
   * @return the secure access button.
   */
  private JButton getLDAPSecureAccessButton()
  {
    if (secureAccessButton == null)
    {
      secureAccessButton =
          UIFactory.makeJButton(INFO_SERVER_SECURITY_BUTTON_LABEL.get(),
              INFO_SERVER_SECURITY_BUTTON_TOOLTIP.get());

      secureAccessButton.addActionListener(new ActionListener()
      {
        public void actionPerformed(ActionEvent ev)
        {
          getConfigureSecureAccessDialog().display(securityOptions);
          if (!getConfigureSecureAccessDialog().isCanceled())
          {
            securityOptions =
              getConfigureSecureAccessDialog().getSecurityOptions();
            lSecurity.setText(
                Utils.getSecurityOptionsString(securityOptions, true));
          }
        }
      });
    }
    return secureAccessButton;
  }

  /**
   * Returns the label associated with the given field name.
   * @param fieldName the field name for which we want to retrieve the JLabel.
   * @return the label associated with the given field name.
   */
  private JLabel getLabel(FieldName fieldName)
  {
    return hmLabels.get(fieldName);
  }

  /**
   * Returns the JTextComponent associated with the given field name.
   * @param fieldName the field name for which we want to retrieve the
   * JTextComponent.
   * @return the JTextComponent associated with the given field name.
   */
  private JTextComponent getField(FieldName fieldName)
  {
    return hmFields.get(fieldName);
  }

  /**
   * Adds the required focus listeners to the fields.
   */
  private void addFocusListeners()
  {
    final FocusListener l = new FocusListener()
    {
      public void focusGained(FocusEvent e)
      {
        lastFocusComponent = e.getComponent();
      }

      public void focusLost(FocusEvent e)
      {
      }
    };

    for (JTextComponent tf : hmFields.values())
    {
      tf.addFocusListener(l);
    }
    getLDAPSecureAccessButton().addFocusListener(l);
    getBrowseButton().addFocusListener(l);
    lastFocusComponent = getField(FieldName.DIRECTORY_MANAGER_PWD);
  }

  /**
   * Returns the port help message that we display when we cannot use the
   * default admin connector port (4444).
   * @return the port help message that we display when we cannot use the
   * default admin connector port (4444).
   */
  private LocalizableMessage getAdminConnectorPortHelpMessage()
  {
    LocalizableMessage s = LocalizableMessage.EMPTY;
    if (defaultUserData.getAdminConnectorPort() != 4444)
    {
      s = INFO_CANNOT_USE_DEFAULT_ADMIN_CONNECTOR_PORT.get();
    }
    return s;
  }

  /**
   * Returns the port help message that we display when we cannot use the
   * default port (389).
   * @return the port help message that we display when we cannot use the
   * default port (389).
   */
  private LocalizableMessage getPortHelpMessage()
  {
    LocalizableMessage s = LocalizableMessage.EMPTY;
    if (defaultUserData.getServerPort() != 389)
    {
      s = INFO_CANNOT_USE_DEFAULT_PORT.get();
    }
    return s;
  }

  private SecurityOptionsDialog getConfigureSecureAccessDialog()
  {
    if (dlg == null)
    {
      dlg = new SecurityOptionsDialog((JFrame)getMainWindow(), securityOptions);
      dlg.setModal(true);
    }
    return dlg;
  }
}