/*
    * Copyright (C) 2003-2014 eXo Platform SAS.
    *
    * This program is free software: you can redistribute it and/or modify
    * it under the terms of the GNU Affero General Public License as published by
    * the Free Software Foundation, either version 3 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 Affero General Public License for more details.
   *
   * You should have received a copy of the GNU Affero General Public License
   * along with this program. If not, see <http://www.gnu.org/licenses/>.
   */
  package org.exoplatform.services.wcm.skin;
  
  import java.util.ArrayList;
  import java.util.Collection;
  import java.util.Collections;
  import java.util.Comparator;
  import java.util.LinkedList;
  import java.util.List;
  import java.util.Map;
  import java.util.Map.Entry;
  
  import org.exoplatform.portal.resource.SkinConfig;
  import org.exoplatform.portal.resource.SkinKey;
  import org.exoplatform.portal.resource.SkinVisitor;
  import org.exoplatform.services.wcm.utils.WCMCoreUtils;
  
  /**
   * Created by The eXo Platform SAS
   * Author : eXoPlatform
   *          exo@exoplatform.com
   * Jun 16, 2014
   */
  public class WCMSkinVisitor implements SkinVisitor{
  
      private List<SkinConfig> wcmSiteSkins = new ArrayList<SkinConfig>();
      private List<SkinConfig> wcmSharedSkins = new ArrayList<SkinConfig>();
      
      private String skinName;
      private String moduleName;
  
      public WCMSkinVisitor(String siteName,String skinName){
        this.skinName = skinName;
        this.moduleName = XSkinService.createModuleName(siteName);
      }
  
      @Override
      public void visitPortalSkin(Entry<SkinKey, SkinConfig> entry) {
        String name = entry.getKey().getName();
        if (name.equals(this.skinName))
          visit(wcmSharedSkins, entry);
      }
  
      @Override
      public void visitSkin(Entry<SkinKey, SkinConfig> entry) {
        String module = entry.getKey().getModule();
        String name = entry.getKey().getName();
        if (name.equals(this.skinName) && module.equals(moduleName))
            visit(wcmSiteSkins,entry);
      }
  
      @Override
      public Collection<SkinConfig> getSkins() {
        List<SkinConfig> skins = new LinkedList<SkinConfig>();
        Comparator<SkinConfig> skinComparator = new Comparator<SkinConfig>(){
          @Override
          public int compare(SkinConfig o1, SkinConfig o2) {
            return o1.getCSSPriority() - o2.getCSSPriority();
          }}; 
              
        Collections.sort(wcmSharedSkins, skinComparator);
        skins.addAll(wcmSharedSkins);
        
        Collections.sort(wcmSiteSkins, skinComparator);
        skins.addAll(wcmSiteSkins);
        
        return skins;
      }
  
      private void visit(Collection<SkinConfig> skins, Entry<SkinKey, SkinConfig> entry){
        String currentContext = WCMCoreUtils.getRepository().getConfiguration().getName();
        String cssPath = entry.getValue().getCSSPath();
        Map<String,String> params = XSkinService.getSkinParams(cssPath);
        if (cssPath.matches(XSkinService.SKIN_PATH_REGEXP)){
          if (!params.get(XSkinService.CONTEXT_PARAM).equals(currentContext))
            return;
        }
        skins.add(entry.getValue());
      }
  }