/**
    * This file Copyright (c) 2009-2015 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.module.templatingkit.templates.ExtrasArea;
  import info.magnolia.module.templatingkit.templates.Floating;
  import info.magnolia.module.templatingkit.templates.SectionMainArea;
  import info.magnolia.module.templatingkit.templates.pages.STKPage;
  import info.magnolia.module.templatingkit.templates.pages.STKPageModel;
  import info.magnolia.rendering.template.AreaDefinition;
  
  import org.apache.commons.lang3.ArrayUtils;
  import org.apache.commons.lang3.StringUtils;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  
  /**
   * Default BodyClassResolver.
   * The body class attributes are used to control the number of columns and the column width.
   * It provides for instance information about whether we have vertical navigation or not.
   */
  public class BodyClassResolver {
  
      private static Logger log = LoggerFactory.getLogger(BodyClassResolver.class);
  
      private String[] allowedBodyClasses = {
              "col",
              "nav-col",
              "col-subcol",
              "col-subcol-equal",
              "col-float3",
              "col-float2",
              "nav-col-float2",
              "col-float2-subcol",
              "col-subcol-subcol"
      };
  
      public void setAllowedBodyClasses(String[] allowedBodyClasses) {
          this.allowedBodyClasses = allowedBodyClasses;
      }
  
      public String[] getAllowedBodyClasses() {
          return allowedBodyClasses;
      }
  
      public String resolveBodyClass(STKPageModel<? extends STKPage> model) {
          final STKPage def = model.getDefinition();
          if (StringUtils.isNotEmpty(def.getBodyClass())) {
              return def.getBodyClass();
          } else {
              boolean nav;
              nav = model.getNavigation().isShowVerticalNavigation();
  
              StringBuffer bodyClass = new StringBuffer();
              if (nav) {
                  bodyClass.append("-nav");
              }
  
              bodyClass.append("-col");
  
              final AreaDefinition mainArea = def.getArea("main");
              if (mainArea instanceof SectionMainArea) {
                  final Floating floating = ((SectionMainArea) mainArea).getFloating();
                  if (floating.isEnabled() && floating.getColumns() > 1) {
                      bodyClass.append("-float" + floating.getColumns());
                  }
              }
 
             AreaDefinition extrasAsSimpleArea = def.getAreas().get("extras");
             boolean extras = extrasAsSimpleArea.getEnabled() != null && extrasAsSimpleArea.getEnabled();
             if (extras) {
                 ExtrasArea extrasArea = (ExtrasArea) extrasAsSimpleArea;
                 int extrasColumns = extrasArea.getColumns();
                 for (int i = 1; i <= extrasColumns; i++) {
                     bodyClass.append("-subcol");
                 }
 
                 boolean extrasSmall = extrasArea.getSmall();
                 if (!extrasSmall) {
                     bodyClass.append("-equal");
                 }
             }
 
             // delete leading -
             bodyClass.deleteCharAt(0);
             String result = bodyClass.toString();
 
             if (result.equals("nav-col-subcol")) {
                 return "";
             }
 
             if (!ArrayUtils.contains(allowedBodyClasses, result)) {
                 log.error("Is not an allowed body class: " + result);
                 return "";
             }
 
             return result;
         }
     }
 
 }