/**
    * This file Copyright (c) 2009-2012 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.templatingkit.style;
  
  import info.magnolia.cms.core.MgnlNodeType;
  import info.magnolia.jcr.util.NodeUtil;
  import info.magnolia.module.templatingkit.templates.AbstractSTKTemplateModel;
  import info.magnolia.module.templatingkit.templates.pages.STKPage;
  import info.magnolia.module.templatingkit.templates.pages.STKPageModel;
  import info.magnolia.rendering.model.RenderingModel;
  import info.magnolia.rendering.template.TemplateDefinition;
  
  import java.util.ArrayList;
  import java.util.Collections;
  import java.util.List;
  
  import javax.jcr.Node;
  import javax.jcr.RepositoryException;
  
  import org.apache.commons.lang.StringUtils;
  
  
  /**
   * Define the Css to use.
   * @author pbracher
   * @version $Id$
   *
   */
  public class CssSelectorBuilder {
  
  
      /**
       * Define the correct CssSelector to use.
       * @param model
       * @return
       */
      @SuppressWarnings("rawtypes")
      public String createCssSelector(AbstractSTKTemplateModel<? extends TemplateDefinition>  model){
          final StringBuffer cssSelector = new StringBuffer();
          RenderingModel<?> rootModelObj = model.getRoot();
          if((rootModelObj instanceof STKPageModel<?>)){
              final STKPageModel<?> rootModel = (STKPageModel<?>) rootModelObj;
              final STKPage rootDef = rootModel.getDefinition();
  
              // body id
              final String bodyId = rootDef.getBodyID();
              if(StringUtils.isNotEmpty(bodyId)){
                  cssSelector.append("#").append(bodyId);
              }
  
              // body class
              final String bodyClass = rootModel.getBodyClass();
              if(StringUtils.isNotEmpty(bodyClass)){
                  cssSelector.append(".").append(bodyClass);
              }
          }
  
          // area div id --> under the assumption that the collection has the same name as the div
  
          // find page node --> model.root.content does not work as the current paragraph might be inherited
          Node page = model.getNode();
          try {
              while(!NodeUtil.isNodeType(page, MgnlNodeType.NT_PAGE)){
                  page = page.getParent();
              }
          }
          catch (RepositoryException e) {
              throw new RuntimeException(e);
         }
         final String pathToPage = NodeUtil.getPathIfPossible(page);
         final String pathInPage = NodeUtil.getPathIfPossible(model.getNode()).substring(pathToPage.length());
         final String areaDivId = pathInPageToAreaId(pathInPage);
         if(StringUtils.isNotEmpty(areaDivId)){
             if(cssSelector.length()>0) {
                 cssSelector.append(" ");
             }
             cssSelector.append("#").append(areaDivId);
         }
 
         List<RenderingModel> models = new ArrayList<RenderingModel>();
         for (RenderingModel current = model; current != rootModelObj; current = current.getParent()) {
             models.add(current);
         }
         Collections.reverse(models);
 
         // now add all div classes to the top model
         for (RenderingModel currentModel : models) {
             final String cssClass;
             if (currentModel instanceof CssSelectorSupportRenderingModel) {
                 cssClass = ((CssSelectorSupportRenderingModel) currentModel).getCssClass();
             }
             else{
                 final info.magnolia.rendering.template.RenderableDefinition definition = currentModel.getDefinition();
                 cssClass = (String) definition.getParameters().get("divClass");
             }
             if(StringUtils.isNotEmpty(cssClass)){
                 if(cssSelector.length()>0) {
                     cssSelector.append(" ");
                 }
                 cssSelector.append(".").append(cssClass.replace(" ", "."));
             }
         }
         return cssSelector.toString();
     }
 
     protected String pathInPageToAreaId(final String pathInPage) {
         final String areaDivId = StringUtils.substringBefore(StringUtils.removeStart(pathInPage, "/"), "/");
         if(areaDivId.equals("opener")){
             return "main";
         }
         // the area containing the main components is named content but the div is named main
         // we should add a div id parameter to the area to make that configurable
         else if(areaDivId.equals("content")){
             return "main";
         }
         return areaDivId;
     }
 
 }