/*
 * Copyright (C) 2005-2009 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.wcm.preview;

import java.util.List;
import java.util.Map;
import java.util.Set;

import org.alfresco.repo.security.authentication.AuthenticationUtil;
import org.alfresco.util.ParameterCheck;
import org.alfresco.wcm.util.WCMUtil;
import org.alfresco.wcm.webproject.WebProjectService;


/**
 * Preview URI Service fundamental API.
 * <p>
 * This service API is designed to support the Preview URI API
 * 
 * @author janv
 * 
 * @since 3.2
 */
public class PreviewURIServiceImpl implements PreviewURIService
{
    private PreviewURIServiceRegistry previewURIProviderRegistry;
    private WebProjectService wpService;
    
    public void setPreviewURIServiceRegistry(PreviewURIServiceRegistry previewURIProviderRegistry)
    {
        this.previewURIProviderRegistry = previewURIProviderRegistry;
    }
    
    public void setWebProjectService(WebProjectService wpService)
    {
        this.wpService = wpService;
    }
    
    /* (non-Javadoc)
     * @see org.alfresco.wcm.preview.PreviewURIService#getPreviewURI(java.lang.String, java.lang.String)
     */
    public String getPreviewURI(String sbStoreId, String pathToAsset)
    {
        ParameterCheck.mandatoryString("sbStoreId", sbStoreId);
        
        String wpStoreId = WCMUtil.getWebProjectStoreId(sbStoreId);
        String authenticatedUser = AuthenticationUtil.getFullyAuthenticatedUser();
        
        String webApp = null;
        if (pathToAsset != null)
        {
            webApp = WCMUtil.getWebapp(WCMUtil.buildPath(sbStoreId, pathToAsset));
        }
        
        PreviewContext prevCtx = new PreviewContext(wpStoreId, webApp, authenticatedUser);
        
        return getProvider(wpStoreId).getPreviewURI(sbStoreId, pathToAsset, prevCtx);
    }
    
    /* (non-Javadoc)
     * @see org.alfresco.wcm.preview.PreviewURIService#getPreviewURIs(java.lang.String, java.util.List)
     */
    public List<String> getPreviewURIs(String sbStoreId, List<String> pathsToAssets)
    {
        ParameterCheck.mandatoryString("sbStoreId", sbStoreId);
        ParameterCheck.mandatory("pathsToAssets", pathsToAssets);
        
        String wpStoreId = WCMUtil.getWebProjectStoreId(sbStoreId);
        String authenticatedUser = AuthenticationUtil.getFullyAuthenticatedUser();
        
        String webApp = WCMUtil.getCommonWebApp(sbStoreId, pathsToAssets);
        
        PreviewContext prevCtx = new PreviewContext(wpStoreId, webApp, authenticatedUser);
        
        return getProvider(wpStoreId).getPreviewURIs(sbStoreId, pathsToAssets, prevCtx);
    }
    
    /* (non-Javadoc)
     * @see org.alfresco.wcm.preview.PreviewURIService#getProviderNames()
     */
    public Set<String> getProviderNames()
    {
        Map<String, PreviewURIServiceProvider> previewProviders = previewURIProviderRegistry.getPreviewURIServiceProviders();
        return previewProviders.keySet();
    }
    
    /* (non-Javadoc)
     * @see org.alfresco.wcm.preview.PreviewURIService#getDefaultProviderName()
     */
    public String getDefaultProviderName()
    {
        // delegate
        return previewURIProviderRegistry.getDefaultProviderName();
    }
    
    /* (non-Javadoc)
     * @see org.alfresco.wcm.preview.PreviewURIService#getProviderName(java.lang.String)
     */
    public String getProviderName(String wpStoreId)
    {
        // delegate
        return wpService.getPreviewProvider(wpStoreId);
    }
    
    private PreviewURIServiceProvider getProvider(String wpStoreId)
    {
        PreviewURIServiceProvider previewProvider = previewURIProviderRegistry.getPreviewURIServiceProviders().get(getProviderName(wpStoreId));
        if (previewProvider == null)
        {
            previewProvider = previewURIProviderRegistry.getPreviewURIServiceProviders().get(previewURIProviderRegistry.getDefaultProviderName());
        }
        return previewProvider;
    }
}