/*
 * 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 2008-2010 Sun Microsystems, Inc.
 * Portions Copyright 2014-2016 ForgeRock AS.
 */
package org.opends.guitools.controlpanel.ui;

import static org.forgerock.opendj.server.config.meta.BackendIndexCfgDefn.IndexType.*;
import static org.opends.messages.AdminToolMessages.*;

import java.awt.Container;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.io.File;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;
import java.util.SortedSet;
import java.util.TreeSet;

import javax.swing.Box;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JComboBox;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;

import org.forgerock.i18n.LocalizableMessage;
import org.forgerock.opendj.config.PropertyException;
import org.forgerock.opendj.config.client.ManagementContext;
import org.forgerock.opendj.config.client.ldap.LDAPManagementContext;
import org.forgerock.opendj.ldap.schema.AttributeType;
import org.forgerock.opendj.server.config.client.BackendIndexCfgClient;
import org.forgerock.opendj.server.config.client.PluggableBackendCfgClient;
import org.forgerock.opendj.server.config.meta.BackendIndexCfgDefn;
import org.forgerock.opendj.server.config.meta.BackendIndexCfgDefn.IndexType;
import org.opends.guitools.controlpanel.datamodel.IndexDescriptor;
import org.opends.guitools.controlpanel.ui.components.TitlePanel;
import org.opends.guitools.controlpanel.ui.renderer.CustomListCellRenderer;
import org.opends.guitools.controlpanel.util.Utilities;
import org.opends.quicksetup.Installation;
import org.opends.server.config.ConfigException;
import org.opends.server.types.OpenDsException;

/**
 * Abstract class used to refactor some code between the classes that are used
 * to edit/create an index.
 */
abstract class AbstractIndexPanel extends StatusGenericPanel
{
  private static final long serialVersionUID = 4465529396749593707L;

  /** Custom attributes message. */
  static final LocalizableMessage CUSTOM_ATTRIBUTES = INFO_CTRL_PANEL_CUSTOM_ATTRIBUTES_LABEL.get();
  /** Standard attributes message. */
  static final LocalizableMessage STANDARD_ATTRIBUTES = INFO_CTRL_PANEL_STANDARD_ATTRIBUTES_LABEL.get();

  /** Minimum value for entry limit. */
  static final int MIN_ENTRY_LIMIT =
      BackendIndexCfgDefn.getInstance().getIndexEntryLimitPropertyDefinition().getLowerLimit();
  /** Maximum value for entry limit. */
  static final int MAX_ENTRY_LIMIT =
      BackendIndexCfgDefn.getInstance().getIndexEntryLimitPropertyDefinition().getUpperLimit();

  /** LocalizableMessage to be displayed to indicate that an index is not configurable. */
  static final LocalizableMessage NON_CONFIGURABLE_INDEX = INFO_CTRL_PANEL_NON_CONFIGURABLE_INDEX_LABEL.get();
  /** LocalizableMessage to be displayed to indicate that an index has been modified. */
  static final LocalizableMessage INDEX_MODIFIED = INFO_CTRL_PANEL_INDEX_MODIFIED_LABEL.get();

  /** Default value for entry limit. */
  static final int DEFAULT_ENTRY_LIMIT = 4000;

  final TitlePanel titlePanel = new TitlePanel(LocalizableMessage.EMPTY, LocalizableMessage.EMPTY);

  /** Attributes combo box. */
  final JComboBox attributes = Utilities.createComboBox();

  /** Name of the index label. */
  final JLabel name = Utilities.createDefaultLabel();
  /** Backends label. */
  private final JLabel lBackend = Utilities.createPrimaryLabel(INFO_CTRL_PANEL_BACKEND_LABEL.get());
  /** Read-only backend name label. */
  final JLabel backendName = Utilities.createDefaultLabel();
  final JLabel lAttribute = Utilities.createPrimaryLabel(INFO_CTRL_PANEL_ATTRIBUTE_LABEL.get());
  final JLabel lEntryLimit = Utilities.createPrimaryLabel(INFO_CTRL_PANEL_ENTRY_LIMIT_LABEL.get());
  final JTextField entryLimit = Utilities.createShortTextField();
  final JLabel lType = Utilities.createPrimaryLabel(INFO_CTRL_PANEL_INDEX_TYPE_LABEL.get());
  /** Panel containing all the index types. */
  final JPanel typesPanel = new JPanel(new GridBagLayout());

  /** Approximate index type check box. */
  final JCheckBox approximate = Utilities.createCheckBox(INFO_CTRL_PANEL_APPROXIMATE_LABEL.get());
  /** Equality index type check box. */
  final JCheckBox equality = Utilities.createCheckBox(INFO_CTRL_PANEL_EQUALITY_LABEL.get());
  /** Ordering index type check box. */
  final JCheckBox ordering = Utilities.createCheckBox(INFO_CTRL_PANEL_ORDERING_LABEL.get());
  /** Presence index type check box. */
  final JCheckBox presence = Utilities.createCheckBox(INFO_CTRL_PANEL_PRESENCE_LABEL.get());
  /** Substring index type check box. */
  final JCheckBox substring = Utilities.createCheckBox(INFO_CTRL_PANEL_SUBSTRING_LABEL.get());
  /** Array of checkboxes. */
  final JCheckBox[] types =       { approximate, equality, ordering, presence, substring };
  /** Array of index types that matches the array of checkboxes (types). */
  private final IndexType[] configTypes = { APPROXIMATE, EQUALITY, ORDERING, PRESENCE, SUBSTRING };

  final JButton deleteIndex = Utilities.createButton(INFO_CTRL_PANEL_DELETE_INDEX_LABEL.get());
  final JButton saveChanges = Utilities.createButton(INFO_CTRL_PANEL_SAVE_CHANGES_LABEL.get());

  /** Label containing some warning information (such as the fact that the index cannot be edited). */
  final JLabel warning = Utilities.createDefaultLabel();

  /**
   * Repopulates the contents of the panel with the provided attribute type. It
   * will check the checkboxes for which the attribute has a matching rule.
   *
   * @param attr
   *          the attribute.
   */
  void repopulateTypesPanel(final AttributeType attr)
  {
    typesPanel.removeAll();
    GridBagConstraints gbc = new GridBagConstraints();
    gbc.gridy = 0;
    gbc.gridx = 0;
    gbc.anchor = GridBagConstraints.WEST;
    gbc.fill = GridBagConstraints.HORIZONTAL;
    if (attr != null)
    {
      if (attr.getApproximateMatchingRule() != null)
      {
        typesPanel.add(approximate, gbc);
        gbc.insets.top = 10;
        gbc.gridy++;
      }
      if (attr.getEqualityMatchingRule() != null)
      {
        typesPanel.add(equality, gbc);
        gbc.insets.top = 10;
        gbc.gridy++;
      }
      if (attr.getOrderingMatchingRule() != null)
      {
        typesPanel.add(ordering, gbc);
        gbc.insets.top = 10;
        gbc.gridy++;
      }
      typesPanel.add(presence, gbc);
      gbc.gridx = 1;
      gbc.weightx = 1.0;
      typesPanel.add(Box.createHorizontalGlue(), gbc);
      gbc.weightx = 0.0;
      gbc.gridx = 0;
      gbc.gridy++;
      gbc.insets.top = 10;
      if (attr.getSubstringMatchingRule() != null)
      {
        typesPanel.add(substring, gbc);
        gbc.insets.top = 10;
      }
    }
    typesPanel.validate();
  }

  /**
   * Creates the basic layout of the panel.
   *
   * @param c
   *          the container of the layout.
   * @param gbc
   *          the grid bag constraints to be used.
   * @param nameReadOnly
   *          whether the panel is read-only or not.
   */
  void createBasicLayout(final Container c, final GridBagConstraints gbc, final boolean nameReadOnly)
  {
    gbc.gridx = 0;
    gbc.gridy = 0;
    gbc.gridwidth = 3;
    addErrorPane(c, gbc);

    if (nameReadOnly)
    {
      gbc.gridy++;
      titlePanel.setTitle(INFO_CTRL_PANEL_INDEX_DETAILS_LABEL.get());
      gbc.fill = GridBagConstraints.HORIZONTAL;
      gbc.anchor = GridBagConstraints.WEST;
      gbc.insets.top = 10;
      gbc.weightx = 1.0;
      JPanel p = new JPanel(new GridBagLayout());
      p.setOpaque(false);
      c.add(p, gbc);
      GridBagConstraints gbc2 = new GridBagConstraints();
      gbc2.weightx = 0.0;
      gbc2.gridwidth = GridBagConstraints.RELATIVE;
      p.add(titlePanel, gbc2);
      gbc2.gridwidth = GridBagConstraints.REMAINDER;
      gbc2.fill = GridBagConstraints.HORIZONTAL;
      gbc2.weightx = 1.0;
      p.add(Box.createHorizontalGlue(), gbc2);
    }

    gbc.gridwidth = 1;
    gbc.gridy++;
    gbc.anchor = GridBagConstraints.WEST;
    gbc.fill = GridBagConstraints.HORIZONTAL;
    gbc.insets.left = 0;
    gbc.gridx = 0;
    gbc.weightx = 0.0;
    c.add(lAttribute, gbc);
    gbc.insets.left = 10;
    gbc.gridx = 1;
    if (!nameReadOnly)
    {
      attributes.addItemListener(new IgnoreItemListener(attributes));
      attributes.setRenderer(new CustomListCellRenderer(attributes));
      c.add(attributes, gbc);
    }
    else
    {
      c.add(name, gbc);
    }
    gbc.insets.top = 10;
    gbc.gridy++;
    gbc.insets.left = 0;
    gbc.gridx = 0;
    c.add(lBackend, gbc);
    gbc.insets.left = 10;
    gbc.gridx = 1;
    c.add(backendName, gbc);

    gbc.gridy++;
    gbc.insets.left = 0;
    gbc.gridx = 0;
    c.add(lEntryLimit, gbc);
    gbc.insets.left = 10;
    gbc.gridx = 1;
    JPanel p = new JPanel(new GridBagLayout());
    p.setOpaque(false);
    c.add(p, gbc);
    GridBagConstraints gbc2 = new GridBagConstraints();
    gbc2.weightx = 0.0;
    gbc2.gridwidth = GridBagConstraints.RELATIVE;
    p.add(entryLimit, gbc2);
    gbc2.gridwidth = GridBagConstraints.REMAINDER;
    gbc2.fill = GridBagConstraints.HORIZONTAL;
    gbc2.weightx = 1.0;
    p.add(Box.createHorizontalGlue(), gbc2);

    gbc.gridx = 0;
    gbc.insets.left = 0;
    gbc.gridy++;
    gbc.weightx = 0.0;
    gbc.weightx = 0.0;
    gbc.anchor = GridBagConstraints.NORTHWEST;
    c.add(lType, gbc);

    gbc.gridx = 1;
    gbc.anchor = GridBagConstraints.WEST;
    gbc.insets.left = 10;
    gbc.weightx = 1.0;
    JCheckBox[] types = { approximate, equality, ordering, presence, substring };
    typesPanel.setOpaque(false);
    c.add(typesPanel, gbc);
    gbc.gridy++;
    gbc2 = new GridBagConstraints();
    gbc.gridwidth = GridBagConstraints.REMAINDER;
    for (JCheckBox type : types)
    {
      type.setOpaque(false);
      typesPanel.add(type, gbc2);
      gbc2.anchor = GridBagConstraints.WEST;
      gbc2.insets.top = 10;
    }

    gbc.weighty = 1.0;
    gbc.weightx = 0.0;
    gbc.gridx = 0;
    gbc.fill = GridBagConstraints.VERTICAL;
    c.add(Box.createVerticalGlue(), gbc);
  }

  /**
   * Returns a sorted set of index types (that matches what the user selected on
   * the check boxes).
   *
   * @return a sorted set of indexes (that matches what the user selected on the
   *         check boxes).
   */
  SortedSet<IndexType> getTypes()
  {
    SortedSet<IndexType> indexTypes = new TreeSet<>();
    for (int i = 0; i < types.length; i++)
    {
      if (types[i].isSelected())
      {
        indexTypes.add(configTypes[i]);
      }
    }
    return indexTypes;
  }

  /**
   * Returns a list of error message with the problems encountered in the data
   * provided by the user.
   *
   * @return a list of error message with the problems encountered in the data
   *         provided by the user.
   */
  List<LocalizableMessage> getErrors()
  {
    List<LocalizableMessage> errors = new ArrayList<>();
    setPrimaryValid(lEntryLimit);
    setPrimaryValid(lType);

    String newEntryLimit = entryLimit.getText().trim();

    try
    {
      int n = Integer.parseInt(newEntryLimit);
      if (n < MIN_ENTRY_LIMIT || MAX_ENTRY_LIMIT < n)
      {
        errors.add(ERR_CTRL_PANEL_INVALID_ENTRY_LIMIT_LABEL.get(MIN_ENTRY_LIMIT, MAX_ENTRY_LIMIT));
        setPrimaryInvalid(lEntryLimit);
      }
    }
    catch (Throwable t)
    {
      errors.add(ERR_CTRL_PANEL_INVALID_ENTRY_LIMIT_LABEL.get(MIN_ENTRY_LIMIT, MAX_ENTRY_LIMIT));
      setPrimaryInvalid(lEntryLimit);
    }

    if (getTypes().isEmpty())
    {
      errors.add(ERR_CTRL_PANEL_NO_INDEX_TYPE_SELECTED.get());
      setPrimaryInvalid(lType);
    }

    return errors;
  }

  void createIndexOffline(final String backendName, final String attributeName,
      final Set<IndexType> indexTypes, final int indexEntryLimit) throws OpenDsException
  {
    updateIndexOffline(backendName, null, attributeName, indexTypes, indexEntryLimit);
  }

  void modifyIndexOffline(final String backendName, final String attributeName, final IndexDescriptor indexToModify,
      final Set<IndexType> indexTypes, final int indexEntryLimit) throws OpenDsException
  {
    updateIndexOffline(backendName, indexToModify, attributeName, indexTypes, indexEntryLimit);
  }

  private void updateIndexOffline(final String backendName, final IndexDescriptor indexToModify,
      final String attributeName, final Set<IndexType> indexTypes, final int indexEntryLimit)
      throws OpenDsException
  {
    getInfo().initializeConfigurationFramework();
    final File configFile = Installation.getLocal().getCurrentConfigurationFile();
    try (ManagementContext context = LDAPManagementContext.newLDIFManagementContext(configFile))
    {
      final PluggableBackendCfgClient backend =
          (PluggableBackendCfgClient) context.getRootConfiguration().getBackend(backendName);
      updateBackendIndexOnline(backend, indexToModify, attributeName, indexTypes, indexEntryLimit);
    }
    catch (final Exception e)
    {
      throw new ConfigException(LocalizableMessage.raw(e.getMessage(), e));
    }
  }

  private void updateBackendIndexOnline(final PluggableBackendCfgClient backend,
      final IndexDescriptor indexToModify, final String attributeName, final Set<IndexType> indexTypes,
      final int indexEntryLimit) throws Exception
  {
    final boolean isCreation = indexToModify == null;
    final List<PropertyException> exceptions = new ArrayList<>();
    final BackendIndexCfgClient index = isCreation
        ? backend.createBackendIndex(BackendIndexCfgDefn.getInstance(), attributeName, exceptions)
        : backend.getBackendIndex(attributeName);

    if (isCreation || indexTypes.equals(indexToModify.getTypes()))
    {
      index.setIndexType(indexTypes);
    }

    if (indexEntryLimit != index.getIndexEntryLimit())
    {
      index.setIndexEntryLimit(indexEntryLimit);
    }
    index.commit();
    Utilities.throwFirstFrom(exceptions);
 }
}