/**
    * This file Copyright (c) 2016 Magnolia International
    * Ltd.  (http://www.magnolia-cms.com). All rights reserved.
    *
    *
    * This file is dual-licensed under both the Magnolia
    * Network Agreement and the GNU General Public License.
    * You may elect to use one or the other of these licenses.
    *
   * This file is distributed in the hope that it will be
   * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the
   * implied warranty of MERCHANTABILITY or FITNESS FOR A
   * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT.
   * Redistribution, except as permitted by whichever of the GPL
   * or MNA you select, is prohibited.
   *
   * 1. For the GPL license (GPL), you can redistribute and/or
   * modify this file under the terms of the GNU General
   * Public License, Version 3, as published by the Free Software
   * Foundation.  You should have received a copy of the GNU
   * General Public License, Version 3 along with this program;
   * if not, write to the Free Software Foundation, Inc., 51
   * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
   *
   * 2. For the Magnolia Network Agreement (MNA), this file
   * and the accompanying materials are made available under the
   * terms of the MNA which accompanies this distribution, and
   * is available at http://www.magnolia-cms.com/mna.html
   *
   * Any modifications to this file must keep this entire header
   * intact.
   *
   */
  package info.magnolia.module.site.renderer;
  
  import info.magnolia.beanmerger.BeanMergerUtil;
  import info.magnolia.config.registry.Registry;
  import info.magnolia.jcr.util.NodeTypes;
  import info.magnolia.jcr.util.NodeUtil;
  import info.magnolia.module.site.Site;
  import info.magnolia.module.site.SiteManager;
  import info.magnolia.module.site.templates.FallbackTemplateDefinition;
  import info.magnolia.rendering.context.RenderingContext;
  import info.magnolia.rendering.engine.RenderException;
  import info.magnolia.rendering.renderer.Renderer;
  import info.magnolia.rendering.renderer.registry.RendererRegistry;
  import info.magnolia.rendering.template.RenderableDefinition;
  
  import java.util.Map;
  
  import javax.inject.Inject;
  import javax.jcr.Node;
  import javax.jcr.RepositoryException;
  
  import org.apache.jackrabbit.commons.JcrUtils;
  
  /**
   * {@link Site}-aware wrapper for a {@link Renderer}.
   */
  public class SiteAwareRendererWrapper implements Renderer {
  
      private final SiteManager siteManager;
      private final FallbackTemplateDefinition fallbackTemplateDefinition;
      private final RendererRegistry rendererRegistry;
  
      private String wrappedRendererType;
  
      @Inject
      public SiteAwareRendererWrapper(SiteManager siteManager, FallbackTemplateDefinition fallbackTemplateDefinition, RendererRegistry rendererRegistry) {
          this.siteManager = siteManager;
          this.fallbackTemplateDefinition = fallbackTemplateDefinition;
          this.rendererRegistry = rendererRegistry;
      }
  
      @Override
      public void render(final RenderingContext renderingCtx, Map<String, Object> contextObjects) throws RenderException {
          Node content = renderingCtx.getCurrentContent();
  
          try {
              RenderableDefinition renderableDefinition = renderingCtx.getRenderableDefinition();
  
              // Merge in case of a page
              if (content != null && NodeUtil.isNodeType(content, NodeTypes.Page.NAME)) {
                  final Site site = getSite(content);
  
                  renderableDefinition = BeanMergerUtil.merge(renderableDefinition, site.getTemplates().getPrototype(), fallbackTemplateDefinition.getFallbackTemplateDefinition());
              }
  
              renderingCtx.push(content, renderableDefinition);
  
              try {
                  rendererRegistry.getProvider(wrappedRendererType).get().render(renderingCtx, contextObjects);
              } catch (Registry.NoSuchDefinitionException e) {
                  throw new RenderException("Render type '" + wrappedRendererType + "' does not exist.", e);
              } finally {
                  renderingCtx.pop();
              }
          } catch (RepositoryException e) {
              throw new RenderException(String.format("Could not determine node type of node [%s]", content), e);
         }
     }
 
     protected Site getSite(Node node) {
         final Site site = siteManager.getAssignedSite(node);
         if (site == null) {
             throw new IllegalStateException("No site configuration found for [" + JcrUtils.toString(node) + "]");
         }
         return site;
     }
 
     public String getWrappedRendererType() {
         return wrappedRendererType;
     }
 
     public void setWrappedRendererType(String wrappedRendererType) {
         this.wrappedRendererType = wrappedRendererType;
     }
 }