/*
 * Copyright (C) 2005-2007 Alfresco Software Limited.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.

 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.

 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 * As a special exception to the terms and conditions of version 2.0 of
 * the GPL, you may redistribute this Program in connection with Free/Libre
 * and Open Source Software ("FLOSS") applications as described in Alfresco's
 * FLOSS exception.  You should have recieved a copy of the text describing
 * the FLOSS exception, and it is also available here:
 * http://www.alfresco.com/legal/licensing
 */
package org.alfresco.repo.avm.wf;

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

import org.alfresco.repo.avm.AVMDAOs;
import org.alfresco.repo.avm.AVMNodeConverter;
import org.alfresco.repo.domain.PropertyValue;
import org.alfresco.repo.security.authentication.AuthenticationUtil;
import org.alfresco.repo.transaction.AlfrescoTransactionSupport;
import org.alfresco.repo.workflow.jbpm.JBPMNode;
import org.alfresco.repo.workflow.jbpm.JBPMSpringActionHandler;
import org.alfresco.service.ServiceRegistry;
import org.alfresco.service.cmr.avm.AVMNodeDescriptor;
import org.alfresco.service.cmr.avm.AVMService;
import org.alfresco.service.cmr.avm.locking.AVMLockingService;
import org.alfresco.service.cmr.avmsync.AVMDifference;
import org.alfresco.service.cmr.avmsync.AVMSyncService;
import org.alfresco.service.cmr.repository.NodeRef;
import org.alfresco.service.namespace.QName;
import org.alfresco.util.Pair;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
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;

    private static final Log logger = LogFactory.getLog(AVMSubmitPackageHandler.class);

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

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

    /** The AVMLockingService instance. */
    private AVMLockingService fAVMLockingService;

    /**
     * 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(final BeanFactory factory)
    {
        fAVMService = (AVMService) factory.getBean(ServiceRegistry.AVM_SERVICE.getLocalName());
        fAVMSyncService = (AVMSyncService) factory.getBean(ServiceRegistry.AVM_SYNC_SERVICE.getLocalName());
        fAVMLockingService = (AVMLockingService) factory.getBean(ServiceRegistry.AVM_LOCKING_SERVICE.getLocalName());
        fAVMSubmitTransactionListener = (AVMSubmitTransactionListener) factory.getBean("AVMSubmitTransactionListener");

        AlfrescoTransactionSupport.bindListener(fAVMSubmitTransactionListener);
    }

    /**
     * Do the actual work.
     * 
     * @param executionContext
     *            The context to get stuff from.
     */
    public void execute(final ExecutionContext executionContext) throws Exception
    {
        // TODO: Allow submit parameters to be passed into this action handler
        // rather than pulling directly from execution context
        final NodeRef pkg = ((JBPMNode) executionContext.getContextInstance().getVariable("bpm_package")).getNodeRef();
        final Pair<Integer, String> pkgPath = AVMNodeConverter.ToAVMVersionPath(pkg);
        final AVMNodeDescriptor pkgDesc = fAVMService.lookup(pkgPath.getFirst(), pkgPath.getSecond());
        final String from = (String) executionContext.getContextInstance().getVariable("wcmwf_fromPath");
        final String targetPath = pkgDesc.getIndirection();
        if (logger.isDebugEnabled())
            logger.debug("handling submit of " + pkgPath.getSecond() + " from " + from + " to " + targetPath);

        // submit the package changes
        final String description = (String) executionContext.getContextInstance().getVariable("bpm_workflowDescription");
        final String tag = (String) executionContext.getContextInstance().getVariable("wcmwf_label");

        final Map<QName, PropertyValue> dnsProperties = this.fAVMService.queryStorePropertyKey(targetPath.split(":")[0], QName.createQName(null, ".dns%"));
        String webProject = dnsProperties.keySet().iterator().next().getLocalName();
        webProject = webProject.substring(webProject.lastIndexOf('.') + 1, webProject.length());
        final List<AVMDifference> stagingDiffs = fAVMSyncService.compare(pkgPath.getFirst(), pkgPath.getSecond(), -1, targetPath, null);
        for (final AVMDifference diff : stagingDiffs)
        {
            String p = diff.getSourcePath();
            if (from != null && from.length() != 0)
            {
                p = from + p.substring(pkgPath.getSecond().length());
            }
            this.recursivelyRemoveLocks(webProject, -1, p);
        }

        // 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);

        // Workflow does this as system as the staging area has restricted access and reviewers
        // may not have permission to flatten the store the workflow was submitted from
        AuthenticationUtil.runAs(new AuthenticationUtil.RunAsWork<Object>()
        {

            public Object doWork() throws Exception
            {
                fAVMSyncService.update(stagingDiffs, null, false, false, true, true, tag, description);
                AVMDAOs.Instance().fAVMNodeDAO.flush();
                fAVMSyncService.flatten(pkgPath.getSecond(), targetPath);
                
                // flatten source folder where changes were submitted from
                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
                    final 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);
                }
                
                return null;
            }
        }, AuthenticationUtil.getSystemUserName());
    }

    /**
     * Recursively remove locks from a path. Walking child folders looking for files to remove locks from.
     */
    private void recursivelyRemoveLocks(final String webProject, final int version, final String path)
    {
        if (logger.isDebugEnabled())
            logger.debug("removing lock on " + path);
        AVMNodeDescriptor desc = fAVMService.lookup(version, path, true);
        if (desc.isFile() || desc.isDeletedFile())
        {
            fAVMLockingService.removeLock(webProject, path.substring(path.indexOf(":") + 1));
        }
        else
        {
            if (desc.isDeletedDirectory() == false)
            {
                Map<String, AVMNodeDescriptor> list = fAVMService.getDirectoryListing(desc, true);
                for (AVMNodeDescriptor child : list.values())
                {
                    recursivelyRemoveLocks(webProject, version, child.getPath());
                }
            }
        }
    }
}