/*
 * 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 2008-2009 Sun Microsystems, Inc.
 * Portions Copyright 2013-2016 ForgeRock AS.
 */
package org.opends.guitools.controlpanel.ui;

import java.awt.Component;
import java.awt.Dimension;
import java.awt.Window;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;

import javax.swing.JComponent;
import javax.swing.JScrollPane;
import javax.swing.JTree;
import javax.swing.event.TreeSelectionEvent;
import javax.swing.event.TreeSelectionListener;
import javax.swing.tree.TreePath;
import javax.swing.tree.TreeSelectionModel;

import org.forgerock.i18n.LocalizableMessage;
import org.opends.guitools.controlpanel.ui.nodes.BasicNode;
import org.opends.guitools.controlpanel.util.Utilities;

/**
 * A basic panel that contains a browser.  It is used in general in panels that
 * require to provide some DNs of existing entries: we allow the user to launch
 * a browser to select entries.
 */
public class LDAPEntrySelectionPanel extends AbstractBrowseEntriesPanel
{
  private LocalizableMessage title;
  private Filter f;
  private String[] dns;

  /**
   * The values of the filters that will be used when opening the dialog where
   * this panel is contained.  For instance if the filter is set to Filter.USERS
   * the panel will display only users when the dialog appears.
   */
  public enum Filter
  {
    /** Display users. */
    USERS,
    /** Display groups. */
    GROUPS,
    /** Display Dynamic Groups. */
    DYNAMIC_GROUPS,
    /** Display Static Groups. */
    STATIC_GROUPS,
    /** Default filter (all entries). */
    DEFAULT
  }

  private static final long serialVersionUID = -8140540064410029902L;

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

  /**
   * Updates the tree selection model to allow multiple selection or not.
   * @param multiple whether the tree should allow multiple selection or not.
   */
  public void setMultipleSelection(boolean multiple)
  {
    treePane.getTree().getSelectionModel().setSelectionMode(multiple ?
        TreeSelectionModel.DISCONTIGUOUS_TREE_SELECTION :
          TreeSelectionModel.SINGLE_TREE_SELECTION);
  }

  @Override
  public void toBeDisplayed(boolean visible)
  {
    super.toBeDisplayed(visible);
    if (visible)
    {
      dns = new String[0];
    }
  }

  @Override
  public LocalizableMessage getTitle()
  {
    return title;
  }

  @Override
  public void okClicked()
  {
    dns = retrieveDNs();
    super.closeClicked();
  }

  /**
   * Returns the selected DN's in an array of Strings.  The array is never
   * <CODE>null</CODE> but might be empty.
   * @return the selected DN's.
   */
  public String[] getDNs()
  {
    return dns;
  }

  private String[] retrieveDNs()
  {
    String[] dns;
    TreePath[] paths = treePane.getTree().getSelectionPaths();
    if (paths != null)
    {
      dns = new String[paths.length];
      for (int i=0; i<paths.length; i++)
      {
        dns[i] = ((BasicNode)paths[i].getLastPathComponent()).getDN();
      }
    }
    else
    {
      dns = new String[0];
    }
    return dns;
  }

  @Override
  public GenericDialog.ButtonType getBrowseButtonType()
  {
    return GenericDialog.ButtonType.OK_CANCEL;
  }

  @Override
  protected Component createMainPanel()
  {
    JComponent p = createTreePane();

    final JTree tree = treePane.getTree();
    tree.getSelectionModel().addTreeSelectionListener(
    new TreeSelectionListener()
    {
      @Override
      public void valueChanged(TreeSelectionEvent ev)
      {
        TreePath[] paths = tree.getSelectionPaths();
        setEnabledOK(paths != null && paths.length > 0);
      }
    });
    MouseListener mouseListener = new MouseAdapter() {
      @Override
      public void mousePressed(MouseEvent e) {
        int selRow = tree.getRowForLocation(e.getX(), e.getY());
        if (selRow != -1 && e.getClickCount() == 2)
        {
          okClicked();
        }
      }
    };
    tree.addMouseListener(mouseListener);

    JScrollPane treeScroll = Utilities.createScrollPane(p);
    treeScroll.setPreferredSize(
        new Dimension(treeScroll.getPreferredSize().width + 30,
            4 * treeScroll.getPreferredSize().height));

    return treeScroll;
  }

  /**
   * Returns the last filter set with the setFilter method.
   * @return the last filter set with the setFilter method.
   */
  public Filter getFilter()
  {
    return f;
  }

  /**
   * Sets the filter to be used when the panel is displayed.
   * @param filter the filter.
   */
  public void setFilter(Filter filter)
  {
    f = filter;
    switch (f)
    {
    case USERS:
      filterAttribute.setSelectedItem(USER_FILTER);
      super.filter.setText("*");
      break;
    case GROUPS:
      filterAttribute.setSelectedItem(GROUP_FILTER);
      super.filter.setText("*");
      break;
    case DYNAMIC_GROUPS:
      filterAttribute.setSelectedItem(LDAP_FILTER);
      super.filter.setText("objectClass=groupOfURLs");
      break;
    case STATIC_GROUPS:
      filterAttribute.setSelectedItem(LDAP_FILTER);
      super.filter.setText("(|(objectClass=groupOfNames)" +
        "(objectClass=groupOfEntries)(objectClass=groupOfUniqueNames))");
      break;
    case DEFAULT:
      Object o = filterAttribute.getItemAt(0);
      filterAttribute.setSelectedItem(o);
      super.filter.setText("");
      break;
    }
    if (controller != null)
    {
      applyButtonClicked();
    }
  }

  /**
   * Sets the title that will be displayed in the dialog containing this panel.
   * @param title the title.
   */
  public void setTitle(LocalizableMessage title)
  {
    this.title = title;
    Window w = Utilities.getParentDialog(this);
    if (w instanceof GenericDialog)
    {
      ((GenericDialog)w).updateTitle();
    }
    else if (w instanceof GenericFrame)
    {
      ((GenericFrame)w).updateTitle();
    }
  }
}