/*
 * Copyright 2010 JBoss Inc
 *
 * Licensed 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.drools.guvnor.client.explorer;

import org.drools.guvnor.client.common.GenericCallback;
import org.drools.guvnor.client.messages.Constants;
import org.drools.guvnor.client.resources.Images;
import org.drools.guvnor.client.rpc.PackageConfigData;
import org.drools.guvnor.client.rpc.RepositoryServiceFactory;
import org.drools.guvnor.client.rpc.SnapshotInfo;
import org.drools.guvnor.client.util.TabOpener;

import com.google.gwt.core.client.GWT;
import com.google.gwt.event.logical.shared.OpenEvent;
import com.google.gwt.event.logical.shared.OpenHandler;
import com.google.gwt.event.logical.shared.SelectionEvent;
import com.google.gwt.user.client.ui.Tree;
import com.google.gwt.user.client.ui.TreeItem;

public class DeploymentTree extends AbstractTree
    implements
    OpenHandler<TreeItem> {
    private static Constants constants = GWT.create( Constants.class );
    private static Images    images    = (Images) GWT.create( Images.class );

    public DeploymentTree() {
        this.name = constants.PackageSnapshots();
        this.image = images.deploy();

        mainTree.setAnimationEnabled( true );
        ExplorerNodeConfig.setupDeploymentTree( mainTree,
                                                itemWidgets );
        mainTree.addSelectionHandler( this );
        mainTree.addOpenHandler( (OpenHandler<TreeItem>) this );
    }

    @Override
    protected Tree createTree() {
        return new Tree();
    }

    public void refreshTree() {
        mainTree.clear();
        itemWidgets.clear();
        ExplorerNodeConfig.setupDeploymentTree( mainTree,
                                                itemWidgets );
    }

    public void onSelection(SelectionEvent<TreeItem> event) {
        TreeItem item = event.getSelectedItem();

        if ( item.getUserObject() instanceof Object[] ) {
            Object[] o = (Object[]) item.getUserObject();
            final String snapName = ((SnapshotInfo) o[0]).name;
            PackageConfigData conf = (PackageConfigData) o[1];
            RepositoryServiceFactory.getService().listSnapshots( conf.name,
                                                                 new GenericCallback<SnapshotInfo[]>() {
                                                                     public void onSuccess(SnapshotInfo[] a) {
                                                                         for ( SnapshotInfo snap : a ) {
                                                                             if ( snap.name.equals( snapName ) ) {
                                                                                 TabOpener opener = TabOpener.getInstance();
                                                                                 opener.openSnapshot( snap );
                                                                                 return;
                                                                             }
                                                                         }
                                                                     }
                                                                 } );
        }
    }

    public void onOpen(OpenEvent<TreeItem> event) {
        final TreeItem node = event.getTarget();
        if ( ExplorerNodeConfig.PACKAGE_SNAPSHOTS.equals( itemWidgets.get( node ) ) ) {
            return;
        }
        final PackageConfigData conf = (PackageConfigData) node.getUserObject();
        if ( conf != null ) {
            RepositoryServiceFactory.getService().listSnapshots( conf.name,
                                                                 new GenericCallback<SnapshotInfo[]>() {
                                                                     public void onSuccess(SnapshotInfo[] snaps) {
                                                                         node.removeItems();
                                                                         for ( final SnapshotInfo snapInfo : snaps ) {
                                                                             TreeItem snap = new TreeItem( snapInfo.name );
                                                                             //snap.setTooltip(snapInfo.comment);
                                                                             snap.setUserObject( new Object[]{snapInfo, conf} );
                                                                             node.addItem( snap );
                                                                         }
                                                                     }
                                                                 } );
        }
    }
}