/*
 *   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.directory.fortress.web.panel;

import com.googlecode.wicket.kendo.ui.form.combobox.ComboBox;
import org.apache.commons.collections.CollectionUtils;
import org.apache.commons.lang.StringUtils;
import org.apache.directory.api.ldap.model.exception.LdapInvalidDnException;
import org.apache.directory.api.ldap.model.name.Dn;
import org.apache.directory.api.ldap.model.name.Rdn;
import org.apache.directory.fortress.core.*;
import org.apache.directory.fortress.core.SecurityException;
import org.apache.directory.fortress.core.util.Config;
import org.apache.directory.fortress.core.util.PropUtil;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.apache.wicket.AttributeModifier;
import org.apache.wicket.Component;
import org.apache.wicket.ajax.AjaxRequestTarget;
import org.apache.wicket.ajax.attributes.AjaxCallListener;
import org.apache.wicket.ajax.attributes.AjaxRequestAttributes;
import org.apache.wicket.ajax.markup.html.AjaxFallbackLink;
import org.apache.wicket.ajax.markup.html.form.AjaxSubmitLink;
import org.apache.wicket.event.IEvent;
import org.apache.wicket.extensions.ajax.markup.html.modal.ModalWindow;
import org.apache.wicket.markup.html.basic.Label;
import org.apache.wicket.markup.html.form.Form;
import org.apache.wicket.markup.html.form.FormComponentPanel;
import org.apache.wicket.markup.html.form.TextField;
import org.apache.wicket.markup.html.navigation.paging.PagingNavigator;
import org.apache.wicket.markup.repeater.Item;
import org.apache.wicket.markup.repeater.data.DataView;
import org.apache.wicket.markup.repeater.data.IDataProvider;
import org.apache.wicket.markup.repeater.data.ListDataProvider;
import org.apache.wicket.model.AbstractReadOnlyModel;
import org.apache.wicket.model.CompoundPropertyModel;
import org.apache.wicket.model.IModel;
import org.apache.wicket.model.PropertyModel;
import org.apache.wicket.spring.injection.annot.SpringBean;
import org.apache.directory.fortress.web.common.GlobalIds;
import org.apache.directory.fortress.web.control.SecUtils;
import org.apache.directory.fortress.web.event.SaveModelEvent;
import org.apache.directory.fortress.web.control.SecureIndicatingAjaxButton;
import org.apache.directory.fortress.web.event.SelectModelEvent;
import org.apache.directory.fortress.core.model.Group;
import org.apache.directory.fortress.core.model.User;

import java.util.*;


/**
 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
 * @version $Rev$
 */
public class GroupDetailPanel extends FormComponentPanel
{
    /** Default serialVersionUID */
    private static final long serialVersionUID = 1L;
    @SpringBean
    private GroupMgr groupMgr;
    private static final Logger LOG = LoggerFactory.getLogger( GroupDetailPanel.class.getName() );
    private Form editForm;
    private Displayable display;
    public static final int ROWS = 5;

    public Form getForm()
    {
        return this.editForm;
    }


    public GroupDetailPanel( String id, Displayable display )
    {
        super( id );
        if (Config.getInstance().getBoolean(org.apache.directory.fortress.core.GlobalIds.IS_ARBAC02))
        {
            this.groupMgr.setAdmin(SecUtils.getSession(this));
        }
        this.editForm = new GroupDetailForm( GlobalIds.EDIT_FIELDS, new CompoundPropertyModel<>( new Group() ) );
        editForm.setOutputMarkupId( true );
        this.display = display;
        add( editForm );
    }

    public class GroupDetailForm extends Form
    {
        /** Default serialVersionUID */
        private static final long serialVersionUID = 1L;
        private Component component;
        private String memberAssign;
        private TextField memberAssignTF;
        private ComboBox<String> memberPropsCB;
        private String memberPropsSelection;

        public GroupDetailForm( String id, final IModel<Group> model )
        {
            super( id, model );
            addGroupDetailFields();
            addGroupButtons();
            setOutputMarkupId( true );
        }

        private void addGroupDetailFields()
        {
            add( new Label( "groupAssignmentsLabel", "Group Detail" ) );
            TextField name = new TextField( "name" );
            add( name );
            name.setRequired( false );
            TextField protocol = new TextField( "protocol" );
            add( protocol );
            TextField description = new TextField( "description" );
            description.setRequired( false );
            add( description );
            protocol.setRequired( true );
            memberPropsCB = new ComboBox<>( "memberProps", new PropertyModel<String>( this,
                "memberPropsSelection" ), new ArrayList<String>() );
            memberPropsCB.setOutputMarkupId( true );
            add( memberPropsCB );
            memberAssignTF = new TextField( "memberAssign", new PropertyModel( this, "memberAssign" ) );
            memberAssignTF.setOutputMarkupId( true );
            add( memberAssignTF );
            addUserSearchModal();
            createDataTable( null );
        }

        private void createDataTable( List<String> members )
        {
            DataView< Member > view = new DataView<Member>("members", createDataProvider( members ) )
            {
                private static final long serialVersionUID = 1L;

                @Override
                protected void populateItem(final Item<Member> item)
                {
                    Member member = item.getModelObject();
                    item.add( new Label( "index", member.getIndex() ) );
                    item.add( new Label( "userDn", member.getUserDn() ) );
                    item.add( AttributeModifier.replace( "class", new AbstractReadOnlyModel<String>()
                    {
                        private static final long serialVersionUID = 1L;

                        @Override
                        public String getObject()
                        {
                            return ( item.getIndex() % 2 == 1 ) ? "even" : "odd";
                        }
                    } ));

                    AjaxFallbackLink<Member> removeLink = new AjaxFallbackLink<Member>( "remove-member", item.getModel() )
                    {
                        @Override
                        public void onClick(Optional<AjaxRequestTarget> targetOptional)
                        {
                            Member member = item.getModelObject();
                            Group group = ( Group ) editForm.getModel().getObject();
                            try
                            {
                                String memberId = getUserId( member.getUserDn() );
                                Group newGroup = groupMgr.deassign( group, memberId );
                                group.setMembers( newGroup.getMembers() );
                                String msg = "Group: " + group.getName() + ", member: " + memberId
                                    + ", has been deassigned";
                                display.setMessage( msg );
                                component = editForm;
                                createDataTable( newGroup.getMembers() );
                            }
                            catch( SecurityException se )
                            {
                                String szError = "Group deassign failed group: " + se;
                                display.setMessage( szError );
                                LOG.warn( szError );
                            }
                            targetOptional.ifPresent(target -> target.add( component ));
                        }
                    };
                    removeLink.setOutputMarkupId( true );
                    item.add(removeLink);
                }
            };
            view.setItemsPerPage( 5L );
            addOrReplace( view );
            addOrReplace( new PagingNavigator( "navigator", view ) );
        }

        private void addGroupButtons()
        {
            add( new SecureIndicatingAjaxButton( GlobalIds.ADD, GlobalIds.GROUP_MGR, "add" )
            {
                /** Default serialVersionUID */
                private static final long serialVersionUID = 1L;


                @Override
                protected void onSubmit( AjaxRequestTarget target )
                {
                    LOG.debug( ".onSubmit Add" );
                    Group group = ( Group ) getForm().getModel().getObject();
                    String msg = null;
                    if ( !StringUtils.isNotBlank( memberAssign ) && !CollectionUtils.isNotEmpty( group.getMembers() ) )
                    {
                        msg = "Group name: " + group.getName() + " cannot be added without a member";
                    }
                    else
                    {
                        try
                        {
                            if ( StringUtils.isNotBlank( memberAssign ) )
                            {
                                group.setMember( memberAssign );
                            }
                            group.setMemberDn( true );
                            group = groupMgr.add( group );
                            component = editForm;
                            SaveModelEvent.send( getPage(), this, group, target, SaveModelEvent.Operations.ADD );
                            msg = "Group name: " + group.getName() + " has been added";
                        }
                        catch ( org.apache.directory.fortress.core.SecurityException se )
                        {
                            String error = ".onSubmit caught SecurityException=" + se;
                            LOG.error( error );
                            display.setMessage( error );
                        }
                    }
                    display.setMessage( msg );
                }


                @Override
                public void onError( AjaxRequestTarget target )
                {
                    LOG.info( "GroupDetailPanel.add.onError caught" );
                    target.add();
                }


                @Override
                protected void updateAjaxAttributes( AjaxRequestAttributes attributes )
                {
                    super.updateAjaxAttributes( attributes );
                    AjaxCallListener ajaxCallListener = new AjaxCallListener()
                    {
                        /** Default serialVersionUID */
                        private static final long serialVersionUID = 1L;


                        @Override
                        public CharSequence getFailureHandler( Component component )
                        {
                            return GlobalIds.WINDOW_LOCATION_REPLACE_COMMANDER_HOME_HTML;
                        }
                    };
                    attributes.getAjaxCallListeners().add( ajaxCallListener );
                }
            } );
            add( new SecureIndicatingAjaxButton( GlobalIds.COMMIT, GlobalIds.GROUP_MGR, "update" )
            {
                /** Default serialVersionUID */
                private static final long serialVersionUID = 1L;


                @Override
                protected void onSubmit( AjaxRequestTarget target )
                {
                    LOG.debug( ".onSubmit Commit" );
                    Group group = ( Group ) getForm().getModel().getObject();
                    try
                    {
                        group = groupMgr.update( group );
                        String msg = "Group name: " + group.getName() + " has been updated";
                        SaveModelEvent.send( getPage(), this, group, target, SaveModelEvent.Operations.UPDATE );
                        component = editForm;
                        display.setMessage( msg );
                    }
                    catch ( org.apache.directory.fortress.core.SecurityException se )
                    {
                        String error = ".onSubmit caught SecurityException=" + se;
                        LOG.error( error );
                        display.setMessage( error );
                    }
                }


                @Override
                public void onError( AjaxRequestTarget target )
                {
                    LOG.warn( "GroupDetailPanel.commit.onError" );
                }


                @Override
                protected void updateAjaxAttributes( AjaxRequestAttributes attributes )
                {
                    super.updateAjaxAttributes( attributes );
                    AjaxCallListener ajaxCallListener = new AjaxCallListener()
                    {
                        /** Default serialVersionUID */
                        private static final long serialVersionUID = 1L;


                        @Override
                        public CharSequence getFailureHandler( Component component )
                        {
                            return GlobalIds.WINDOW_LOCATION_REPLACE_COMMANDER_HOME_HTML;
                        }
                    };
                    attributes.getAjaxCallListeners().add( ajaxCallListener );
                }
            } );
            add( new SecureIndicatingAjaxButton( GlobalIds.DELETE, GlobalIds.GROUP_MGR, "delete" )
            {
                /** Default serialVersionUID */
                private static final long serialVersionUID = 1L;


                @Override
                protected void onSubmit( AjaxRequestTarget target )
                {
                    LOG.debug( ".onSubmit Commit" );
                    Group group = ( Group ) getForm().getModel().getObject();
                    try
                    {
                        groupMgr.delete( group );
                        clearDetailFields( "Group name: " + group.getName() + " has been deleted", target, getForm() );
                        SaveModelEvent.send( getPage(), this, group, target, SaveModelEvent.Operations.DELETE );
                    }
                    catch ( org.apache.directory.fortress.core.SecurityException se )
                    {
                        String error = ".onSubmit caught SecurityException=" + se;
                        LOG.error( error );
                        display.setMessage( error );
                    }
                }


                @Override
                public void onError( AjaxRequestTarget target )
                {
                    LOG.warn( "GroupDetailPanel.delete.onError" );
                }


                @Override
                protected void updateAjaxAttributes( AjaxRequestAttributes attributes )
                {
                    super.updateAjaxAttributes( attributes );
                    AjaxCallListener ajaxCallListener = new AjaxCallListener()
                    {
                        /** Default serialVersionUID */
                        private static final long serialVersionUID = 1L;


                        @Override
                        public CharSequence getFailureHandler( Component component )
                        {
                            return GlobalIds.WINDOW_LOCATION_REPLACE_COMMANDER_HOME_HTML;
                        }
                    };
                    attributes.getAjaxCallListeners().add( ajaxCallListener );
                }
            } );
            add( new AjaxSubmitLink( GlobalIds.CANCEL )
            {
                /** Default serialVersionUID */
                private static final long serialVersionUID = 1L;


                @Override
                protected void onSubmit( AjaxRequestTarget target )
                {
                    clearDetailFields( "Group cancelled input form", target, getForm() );
                }


                @Override
                public void onError( AjaxRequestTarget target )
                {
                    LOG.warn( "GroupDetailPanel.cancel.onError" );
                }


                @Override
                protected void updateAjaxAttributes( AjaxRequestAttributes attributes )
                {
                    super.updateAjaxAttributes( attributes );
                    AjaxCallListener ajaxCallListener = new AjaxCallListener()
                    {
                        /** Default serialVersionUID */
                        private static final long serialVersionUID = 1L;


                        @Override
                        public CharSequence getFailureHandler( Component component )
                        {
                            return GlobalIds.WINDOW_LOCATION_REPLACE_COMMANDER_HOME_HTML;
                        }
                    };
                    attributes.getAjaxCallListeners().add( ajaxCallListener );
                }
            } );

            add( new SecureIndicatingAjaxButton( "memberProps.add", GlobalIds.GROUP_MGR, "addProperty" )
            {
                private static final long serialVersionUID = 1L;


                @Override
                protected void onSubmit( AjaxRequestTarget target )
                {
                    String msg = "clicked on memberProps.add";
                    if ( StringUtils.isNotBlank( memberPropsSelection ) )
                    {
                        msg += " selection:" + memberPropsSelection;
                        Group group = ( Group ) getForm().getModel().getObject();
                        int idx = memberPropsSelection.indexOf( '=' );
                        if ( idx != -1 )
                        {
                            String key = memberPropsSelection.substring( 0, idx );
                            String val = memberPropsSelection.substring( idx + 1 );
                            try
                            {
                                Group newGroup = groupMgr.add( group, key, val );
                                group.setProperties( newGroup.getProperties() );
                                memberPropsCB = new ComboBox<>( "memberProps", new PropertyModel<String>( getForm(),
                                    "memberPropsSelection" ), group.getPropList() );
                                getForm().addOrReplace( memberPropsCB );
                            }
                            catch ( org.apache.directory.fortress.core.SecurityException se )
                            {
                                String error = "Failed add property: " + memberPropsSelection + ", SecurityException="
                                    + se;
                                LOG.warn( error );
                                display.setMessage( error );
                            }
                        }
                        memberPropsSelection = "";
                        component = editForm;
                        msg += ", was added";
                    }
                    else
                    {
                        msg += ", no action taken because property selection is empty";
                    }
                    display.setMessage( msg );
                    LOG.debug( msg );
                }


                @Override
                protected void updateAjaxAttributes( AjaxRequestAttributes attributes )
                {
                    super.updateAjaxAttributes( attributes );
                    AjaxCallListener ajaxCallListener = new AjaxCallListener()
                    {
                        /** Default serialVersionUID */
                        private static final long serialVersionUID = 1L;


                        @Override
                        public CharSequence getFailureHandler( Component component )
                        {
                            return GlobalIds.WINDOW_LOCATION_REPLACE_COMMANDER_HOME_HTML;
                        }
                    };
                    attributes.getAjaxCallListeners().add( ajaxCallListener );
                }
            } );

            add( new SecureIndicatingAjaxButton( "memberProps.delete", GlobalIds.GROUP_MGR, "deleteProperty" )
            {
                private static final long serialVersionUID = 1L;


                @Override
                protected void onSubmit( AjaxRequestTarget target )
                {
                    String msg = "clicked on memberProps.delete";
                    if ( StringUtils.isNotBlank( memberPropsSelection ) )
                    {
                        msg += " selection:" + memberPropsSelection;
                        Group group = ( Group ) getForm().getModel().getObject();
                        if ( group.getProperties() != null )
                        {
                            int idx = memberPropsSelection.indexOf( '=' );
                            if ( idx != -1 )
                            {
                                String key = memberPropsSelection.substring( 0, idx );
                                String val = memberPropsSelection.substring( idx + 1 );
                                try
                                {
                                    Group newGroup = groupMgr.delete( group, key, val );
                                    group.setProperties( newGroup.getProperties() );
                                    memberPropsCB = new ComboBox<>( "memberProps", new PropertyModel<String>(
                                            getForm(), "memberPropsSelection" ), group.getPropList() );
                                    getForm().addOrReplace( memberPropsCB );
                                }
                                catch ( org.apache.directory.fortress.core.SecurityException se )
                                {
                                    String error = "Failed delete property: " + memberPropsSelection
                                        + ", SecurityException=" + se;
                                    LOG.warn( error );
                                    display.setMessage( error );
                                }
                            }
                            memberPropsSelection = "";
                            component = editForm;
                            msg += ", was removed";
                        }
                        else
                        {
                            msg += ", no action taken because group does not have properties set";
                        }
                    }
                    else
                    {
                        msg += ", no action taken because property selection is empty";
                    }
                    display.setMessage( msg );
                    LOG.debug( msg );
                }


                @Override
                protected void updateAjaxAttributes( AjaxRequestAttributes attributes )
                {
                    super.updateAjaxAttributes( attributes );
                    AjaxCallListener ajaxCallListener = new AjaxCallListener()
                    {
                        /** Default serialVersionUID */
                        private static final long serialVersionUID = 1L;


                        @Override
                        public CharSequence getFailureHandler( Component component )
                        {
                            return GlobalIds.WINDOW_LOCATION_REPLACE_COMMANDER_HOME_HTML;
                        }
                    };
                    attributes.getAjaxCallListeners().add( ajaxCallListener );
                }
            } );

            add( new SecureIndicatingAjaxButton( "member.assign", GlobalIds.GROUP_MGR, "assign" )
            {
                private static final long serialVersionUID = 1L;


                @Override
                protected void onSubmit( AjaxRequestTarget target )
                {
                    Group group = ( Group ) getForm().getModel().getObject();
                    if ( StringUtils.isNotBlank( memberAssign ) )
                    {
                        try
                        {
                            String userId = getUserId( memberAssign );
                            if( userId != null )
                            {
                                Group newGroup = groupMgr.assign( group, userId );
                                group.setMembers( newGroup.getMembers() );

                                String msg = "Group: " + group.getName() + ", member: " + memberAssign
                                    + ", has been assigned";
                                memberAssign = "";
                                getForm().add( memberAssignTF );
                                display.setMessage( msg );
                                LOG.debug( msg );
                                createDataTable( newGroup.getMembers() );
                            }
                        }
                        catch ( org.apache.directory.fortress.core.SecurityException se )
                        {
                            String error = "Failed assign user: " + memberAssign + ", SecurityException=" + se;
                            LOG.warn( error );
                            display.setMessage( error );
                        }
                    }
                    else
                    {
                        String msg = "Group: " + group.getName()
                            + ", assign op ignored, no value entered for assignment";
                        display.setMessage( msg );
                        LOG.debug( msg );
                    }
                    component = editForm;
                }


                @Override
                protected void updateAjaxAttributes( AjaxRequestAttributes attributes )
                {
                    super.updateAjaxAttributes( attributes );
                    AjaxCallListener ajaxCallListener = new AjaxCallListener()
                    {
                        /** Default serialVersionUID */
                        private static final long serialVersionUID = 1L;


                        @Override
                        public CharSequence getFailureHandler( Component component )
                        {
                            return GlobalIds.WINDOW_LOCATION_REPLACE_COMMANDER_HOME_HTML;
                        }
                    };
                    attributes.getAjaxCallListeners().add( ajaxCallListener );
                }
            } );

            add( new SecureIndicatingAjaxButton( "member.deassign", GlobalIds.GROUP_MGR, "deassign" )
            {
                private static final long serialVersionUID = 1L;


                @Override
                protected void onSubmit( AjaxRequestTarget target )
                {
                    Group group = ( Group ) getForm().getModel().getObject();
                    if ( StringUtils.isNotBlank( memberAssign ) )
                    {
                        try
                        {
                            // TODO: figure out how to get the table to refresh its values here:
                            String userId = getUserId( memberAssign );
                            if( userId != null )
                            {
                                Group newGroup = groupMgr.deassign( group, userId );
                                group.setMembers( newGroup.getMembers() );
                                String msg = "Group: " + group.getName() + ", member: " + memberAssign
                                    + ", has been deassigned";
                                memberAssign = "";
                                getForm().add( memberAssignTF );
                                display.setMessage( msg );
                                LOG.debug( msg );
                                createDataTable( newGroup.getMembers() );
                            }
                        }
                        catch ( org.apache.directory.fortress.core.SecurityException se )
                        {
                            String error = "Failed assign user: " + memberAssign + ", SecurityException=" + se;
                            LOG.warn( error );
                            display.setMessage( error );
                        }
                    }
                    else
                    {
                        String msg = "Group: " + group.getName()
                            + ", assign op ignored, no value entered for deassignment";
                        display.setMessage( msg );
                        LOG.debug( msg );
                    }
                    component = editForm;
                }


                @Override
                protected void updateAjaxAttributes( AjaxRequestAttributes attributes )
                {
                    super.updateAjaxAttributes( attributes );
                    AjaxCallListener ajaxCallListener = new AjaxCallListener()
                    {
                        /** Default serialVersionUID */
                        private static final long serialVersionUID = 1L;


                        @Override
                        public CharSequence getFailureHandler( Component component )
                        {
                            return GlobalIds.WINDOW_LOCATION_REPLACE_COMMANDER_HOME_HTML;
                        }
                    };
                    attributes.getAjaxCallListeners().add( ajaxCallListener );
                }
            } );
        }


        private void clearDetailFields( String msg, AjaxRequestTarget target, Form form )
        {
            setModelObject( new Group() );
            memberAssign = "";
            memberPropsCB = new ComboBox<>( "memberProps", new PropertyModel<String>( form,
                "memberPropsSelection" ), new ArrayList<String>() );
            editForm.addOrReplace( memberPropsCB );
            createDataTable( null );
            modelChanged();
            component = editForm;
            display.setMessage( msg );
        }

        private IDataProvider<Member> createDataProvider( List<String> members )
        {
            ListDataProvider<Member> results;
            if ( CollectionUtils.isNotEmpty( members ) )
            {
                Collections.sort( members, new Comparator<String>()
                {
                    @Override
                    public int compare(String m1, String m2)
                    {
                        return m1.compareToIgnoreCase( m2 );
                    }
                } );

                int ctr = 0;
                List<Member> tableMembers = new ArrayList<>();
                for ( String member : members )
                {
                    Member tableMember = new Member();
                    tableMember.setUserDn( member );
                    tableMember.setIndex( ++ctr );
                    tableMembers.add( tableMember );
                }
                results = new ListDataProvider<>( tableMembers );
            }
            else
            {
                results = new ListDataProvider<>( new ArrayList<Member>() );
            }
            return results;
        }


        private void addUserSearchModal()
        {
            final ModalWindow membersModalWindow;
            add( membersModalWindow = new ModalWindow( "membersmodal" ) );
            final UserSearchModalPanel memberSearchModalPanel = new UserSearchModalPanel(
                membersModalWindow.getContentId(), membersModalWindow );
            membersModalWindow.setContent( memberSearchModalPanel );
            membersModalWindow.setWindowClosedCallback( new ModalWindow.WindowClosedCallback()
            {
                /** Default serialVersionUID */
                private static final long serialVersionUID = 1L;


                @Override
                public void onClose( AjaxRequestTarget target )
                {
                    User user = memberSearchModalPanel.getUserSelection();
                    if ( user != null )
                    {
                        setMemberAssign( user.getDn() );
                        target.add( memberAssignTF );
                    }
                }
            } );

            add( new SecureIndicatingAjaxButton( "members.search", GlobalIds.REVIEW_MGR, "findUsers" )
            {
                private static final long serialVersionUID = 1L;

                @Override
                protected void onSubmit( AjaxRequestTarget target )
                {
                    String msg = "clicked on members search";
                    msg += memberAssign != null ? ": " + memberAssign : "";
                    display.setMessage( msg );
                    LOG.debug( msg );
                    if ( StringUtils.isNotBlank( memberAssign ) )
                    {
                        memberSearchModalPanel.setSearchVal( memberAssign );
                    }
                    target.prependJavaScript( GlobalIds.WICKET_WINDOW_UNLOAD_CONFIRMATION_FALSE );
                    membersModalWindow.show( target );
                }


                @Override
                protected void updateAjaxAttributes( AjaxRequestAttributes attributes )
                {
                    super.updateAjaxAttributes( attributes );
                    AjaxCallListener ajaxCallListener = new AjaxCallListener()
                    {
                        /** Default serialVersionUID */
                        private static final long serialVersionUID = 1L;


                        @Override
                        public CharSequence getFailureHandler( Component component )
                        {
                            return GlobalIds.WINDOW_LOCATION_REPLACE_COMMANDER_HOME_HTML;
                        }
                    };
                    attributes.getAjaxCallListeners().add( ajaxCallListener );
                }
            } );

            membersModalWindow.setTitle( "Members Selection Modal" );
            membersModalWindow.setInitialWidth( 450 );
            membersModalWindow.setInitialHeight( 450 );
            membersModalWindow.setCookieName( "members-modal" );
        }


        @Override
        public void onEvent( final IEvent event )
        {
            if ( event.getPayload() instanceof SelectModelEvent )
            {
                SelectModelEvent modelEvent = ( SelectModelEvent ) event.getPayload();
                final Group group = ( Group ) modelEvent.getEntity();
                this.setModelObject( group );
                memberPropsSelection = "";
                if ( PropUtil.isNotEmpty( group.getProperties() ) )
                {
                    memberPropsCB = new ComboBox<>( "memberProps", new PropertyModel<String>( this,
                        "memberPropsSelection" ), group.getPropList() );
                    editForm.addOrReplace( memberPropsCB );
                }
                createDataTable( group.getMembers() );
                String msg = "Group Name: " + group.getName() + " has been selected";
                display.setMessage( msg );
                LOG.debug( msg );
                component = editForm;
            }
            else if ( event.getPayload() instanceof AjaxRequestTarget )
            {
                if ( component != null )
                {
                    AjaxRequestTarget target = ( ( AjaxRequestTarget ) event.getPayload() );
                    LOG.debug( ".onEvent AjaxRequestTarget: " + target.toString() );
                    target.add( component );
                    component = null;
                }

                display.display( ( AjaxRequestTarget ) event.getPayload() );
            }
        }

        /**
         * Method will retrieve the userId from a distinguished name variable.
         *
         * @param szDn contains ldap distinguished name.
         * @return userId as string.
         */
        private String getUserId(String szDn)
        {
            String szUserId = null;
            try
            {
                Dn dn = new Dn( szDn );
                Rdn rDn = dn.getRdn();
                String szRdn = rDn.getName();
                int indexEquals = szRdn.indexOf( '=' ) + 1;
                if (indexEquals != -1)
                    szUserId = szRdn.substring( indexEquals );
            }
            catch ( LdapInvalidDnException e )
            {
                String error = "User DN: " + szDn + ", incorrect format: " + e;
                LOG.warn( error );
                display.setMessage( error );
            }
            return szUserId;
        }


        public String getMemberAssign()
        {
            return memberAssign;
        }


        public void setMemberAssign( String memberAssign )
        {
            this.memberAssign = memberAssign;
        }


        public String getMemberPropsSelection()
        {
            return memberPropsSelection;
        }


        public void setMemberPropsSelection( String memberPropsSelection )
        {
            this.memberPropsSelection = memberPropsSelection;
        }
    }
}