/*
 * 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.web.scripts;

import java.util.List;

import org.alfresco.model.ContentModel;
import org.alfresco.repo.security.authentication.AuthenticationUtil;
import org.alfresco.repo.transaction.TransactionUtil;
import org.alfresco.service.cmr.repository.NodeRef;
import org.alfresco.service.cmr.repository.NodeService;
import org.alfresco.service.cmr.repository.StoreRef;
import org.alfresco.service.cmr.search.SearchService;
import org.alfresco.service.cmr.security.PersonService;
import org.alfresco.service.namespace.NamespaceService;
import org.alfresco.service.transaction.TransactionService;
import org.alfresco.util.AbstractLifecycleBean;
import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.context.ApplicationEvent;
import org.springframework.context.ApplicationListener;


/**
 * Provision of Repository Context
 * 
 * @author davidc
 */
public class WebScriptContext implements ApplicationContextAware, ApplicationListener
{
    private ProcessorLifecycle lifecycle = new ProcessorLifecycle();

    // dependencies
    private TransactionService transactionService;
    private NamespaceService namespaceService;
    private SearchService searchService;
    private NodeService nodeService;
    private PersonService personService;
    
    // company home
    private StoreRef companyHomeStore;
    private String companyHomePath;
    private NodeRef companyHome;
    
    
    /**
     * Sets the Company Home Store
     * 
     * @param companyHomeStore
     */
    public void setCompanyHomeStore(String companyHomeStore)
    {
        this.companyHomeStore = new StoreRef(companyHomeStore);
    }
    
    /**
     * Sets the Company Home Path
     * 
     * @param companyHomePath
     */
    public void setCompanyHomePath(String companyHomePath)
    {
        this.companyHomePath = companyHomePath;
    }

    /**
     * Sets the transaction service
     * 
     * @param transactionService
     */
    public void setTransactionService(TransactionService transactionService)
    {
        this.transactionService = transactionService;
    }

    /**
     * Sets the namespace service
     * 
     * @param namespaceService
     */
    public void setNamespaceService(NamespaceService namespaceService)
    {
        this.namespaceService = namespaceService;
    }
    
    /**
     * Sets the search service
     * 
     * @param searchService
     */
    public void setSearchService(SearchService searchService)
    {
        this.searchService = searchService;
    }
    
    /**
     * Sets the node service
     * 
     * @param nodeService
     */
    public void setNodeService(NodeService nodeService)
    {
        this.nodeService = nodeService;
    }
    
    /**
     * Sets the person service
     * 
     * @param personService
     */
    public void setPersonService(PersonService personService)
    {
        this.personService = personService;
    }

    /* (non-Javadoc)
     * @see org.springframework.context.ApplicationContextAware#setApplicationContext(org.springframework.context.ApplicationContext)
     */
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException
    {
        lifecycle.setApplicationContext(applicationContext);
    }

    /* (non-Javadoc)
     * @see org.springframework.context.ApplicationListener#onApplicationEvent(org.springframework.context.ApplicationEvent)
     */
    public void onApplicationEvent(ApplicationEvent event)
    {
        lifecycle.onApplicationEvent(event);
    }
    
    /**
     * Hooks into Spring Application Lifecycle
     */
    private class ProcessorLifecycle extends AbstractLifecycleBean
    {
        @Override
        protected void onBootstrap(ApplicationEvent event)
        {
            initContext();
        }
    
        @Override
        protected void onShutdown(ApplicationEvent event)
        {
        }
    }

    /**
     * Initialise Repository Context
     */
    protected void initContext()
    {
        TransactionUtil.executeInUserTransaction(transactionService, new TransactionUtil.TransactionWork<Object>()
        {
            @SuppressWarnings("synthetic-access")
            public Object doWork() throws Exception
            {
                List<NodeRef> refs = searchService.selectNodes(nodeService.getRootNode(companyHomeStore), companyHomePath, null, namespaceService, false);
                if (refs.size() != 1)
                {
                    throw new IllegalStateException("Invalid company home path: " + companyHomePath + " - found: " + refs.size());
                }
                companyHome = refs.get(0);
                return null;
            }
        });
    }
    
    /**
     * Gets the Company Home
     *  
     * @return  company home node ref
     */
    public NodeRef getCompanyHome()
    {
        return companyHome;
    }

    /**
     * Gets the currently authenticated person
     * 
     * @return  person node ref
     */
    public NodeRef getPerson()
    {
        NodeRef person = null;
        String currentUserName = AuthenticationUtil.getCurrentUserName();
        if (personService.personExists(currentUserName))
        {
            person = personService.getPerson(currentUserName);
        }
        return person;
    }

    /**
     * Gets the user home of the currently authenticated person
     * 
     * @param person  person
     * @return  user home of person
     */
    public NodeRef getUserHome(NodeRef person)
    {
        return (NodeRef)nodeService.getProperty(person, ContentModel.PROP_HOMEFOLDER);
    }
    
}