/*
 * Copyright (C) 2006 Alfresco, Inc.
 *
 * Licensed under the Mozilla Public License version 1.1 
 * with a permitted attribution clause. You may obtain a
 * copy of the License at
 *
 *   http://www.alfresco.org/legal/license.txt
 *
 * 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.alfresco.repo.avm.wf;

import java.io.Serializable;
import java.util.List;

import org.alfresco.repo.avm.AVMDAOs;
import org.alfresco.repo.avm.AVMNodeConverter;
import org.alfresco.repo.transaction.AlfrescoTransactionSupport;
import org.alfresco.repo.workflow.jbpm.JBPMNode;
import org.alfresco.repo.workflow.jbpm.JBPMSpringActionHandler;
import org.alfresco.service.cmr.avm.AVMNodeDescriptor;
import org.alfresco.service.cmr.avm.AVMService;
import org.alfresco.service.cmr.avmsync.AVMDifference;
import org.alfresco.service.cmr.avmsync.AVMSyncService;
import org.alfresco.service.cmr.repository.NodeRef;
import org.alfresco.util.Pair;
import org.jbpm.graph.exe.ExecutionContext;
import org.springframework.beans.factory.BeanFactory;

public class AVMSubmitPackageHandler extends JBPMSpringActionHandler implements
        Serializable 
{
    private static final long serialVersionUID = 4113360751217684995L;

    /**
     * The AVMService instance.
     */
    private AVMService fAVMService;
    
    /**
     * The AVMSyncService instance.
     */
    private AVMSyncService fAVMSyncService;

    /**
     * The AVMSubmittedAspect instance.
     */
    private AVMSubmittedAspect fAVMSubmittedAspect;

    /**
     * The AVMSubmitTransactionListener instance 
     * (for JMX notification of virtualization server after commit/rollback).
     */
    private AVMSubmitTransactionListener fAVMSubmitTransactionListener;

    
    /**
     * Initialize service references.
     * @param factory The BeanFactory to get references from.
     */
    @Override
    protected void initialiseHandler(BeanFactory factory) 
    {
        fAVMService = (AVMService)factory.getBean("AVMService");
        fAVMSyncService = (AVMSyncService)factory.getBean("AVMSyncService");
        fAVMSubmittedAspect = (AVMSubmittedAspect)factory.getBean("AVMSubmittedAspect");
        fAVMSubmitTransactionListener = (AVMSubmitTransactionListener) factory.getBean("AVMSubmitTransactionListener");

        AlfrescoTransactionSupport.bindListener(fAVMSubmitTransactionListener);
    }

    /**
     * Do the actual work.
     * @param executionContext The context to get stuff from.
     */
    public void execute(ExecutionContext executionContext) throws Exception 
    {
        // TODO: Allow submit parameters to be passed into this action handler
        //       rather than pulling directly from execution context
        
        NodeRef pkg = ((JBPMNode)executionContext.getContextInstance().getVariable("bpm_package")).getNodeRef();
        Pair<Integer, String> pkgPath = AVMNodeConverter.ToAVMVersionPath(pkg);

        // submit the package changes
        String description = (String)executionContext.getContextInstance().getVariable("bpm_workflowDescription");
        String tag = (String)executionContext.getContextInstance().getVariable("wcmwf_label");
        AVMNodeDescriptor pkgDesc = fAVMService.lookup(pkgPath.getFirst(), pkgPath.getSecond());
        String targetPath = pkgDesc.getIndirection();
		List<AVMDifference> stagingDiffs = fAVMSyncService.compare(pkgPath.getFirst(), pkgPath.getSecond(), -1, targetPath, null);
        for (AVMDifference diff : stagingDiffs)
        {
            fAVMSubmittedAspect.clearSubmitted(diff.getSourceVersion(), diff.getSourcePath());
        }
        
        // Allow AVMSubmitTransactionListener to inspect the staging diffs
        // so it can notify the virtualization server via JMX if when this
        // submit succeeds or fails.   This allows virtual webapps devoted
        // to the workarea to be destroyed, and staging to be updated in
        // the event that some of the files alter the behavior of the
        // webapp itself (e.g.: WEB-INF/web.xml, WEB-INF/lib/*.jar), etc.

        AlfrescoTransactionSupport.bindResource("staging_diffs", stagingDiffs);


        fAVMSyncService.update(stagingDiffs, null, false, false, true, true, tag, description);

        // flatten source folder where changes were submitted from
        String from = (String)executionContext.getContextInstance().getVariable("wcmwf_fromPath");
        if (from != null && from.length() > 0)
        {
            // first, submit changes back to sandbox forcing addition of edits in workflow (and submission 
            // flag removal). second, flatten sandbox, removing modified items that have been submitted
            // TODO: Without locking on the sandbox, it's possible that a change to a "submitted" item
            //       may get lost when the item is finally approved
            List<AVMDifference> sandboxDiffs = fAVMSyncService.compare(pkgPath.getFirst(), pkgPath.getSecond(), -1, from, null);
            fAVMSyncService.update(sandboxDiffs, null, true, true, false, false, tag, description);
            AVMDAOs.Instance().fAVMNodeDAO.flush();
            fAVMSyncService.flatten(from, targetPath);
        }
    }
}