/*
    * Licensed to the Apache Software Foundation (ASF) under one
    * or more contributor license agreements.  See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership.  The ASF licenses this file
    * to you under the Apache License, Version 2.0 (the
    * "License"); you may not use this file except in compliance
    * with the License.  You may obtain a copy of the License at
    *
   *   http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing,
   * software distributed under the License is distributed on an
   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
   * KIND, either express or implied.  See the License for the
   * specific language governing permissions and limitations
   * under the License.
   */
  package org.devacfr.maven.skins.reflow.model;
  
  import static java.util.Objects.requireNonNull;
  
  import java.util.List;
  
  import javax.annotation.Nonnull;
  
  import org.apache.maven.doxia.site.SiteModel;
  import org.codehaus.plexus.util.xml.Xpp3Dom;
  import org.devacfr.maven.skins.reflow.ISkinConfig;
  
  import com.google.common.base.Strings;
  import com.google.common.collect.Lists;
  
  /**
   * Represents the footer component.
   *
   * @author devacfr
   * @since 2.0
   */
  public class Footer extends BsComponent {
  
      /** */
      private static final String COMPONENT = "footer";
  
      /** */
      private final List<Column> columns = Lists.newArrayList();
  
      /**
       * Default constructor.
       *
       * @param config
       *            a config (can not be {@code null}).
       */
      public Footer(@Nonnull final ISkinConfig config) {
          super(COMPONENT);
          requireNonNull(config);
          this.setTheme(config.getAttributeValue(COMPONENT, "theme", String.class, "light"));
          this.setBackground(config.getAttributeValue(COMPONENT, "background", String.class, "light"));
          this.setCssClass(config.getAttributeValue(COMPONENT, "cssClass", String.class, null));
  
          final Xpp3Dom bottomNav = config.get("bottomNav");
          final SiteModel model = config.getSiteModel();
  
          if (model.getBody() != null && model.getBody().getMenus() != null) {
              final List<org.apache.maven.doxia.site.Menu> menus = model.getBody().getMenus();
              if (bottomNav != null && bottomNav.getChildren().length > 0) {
                  // foreach columns
                  for (final Xpp3Dom col : bottomNav.getChildren()) {
                      final String regex = col.getValue();
                      if (Strings.isNullOrEmpty(regex)) {
                          continue;
                      }
                      final List<Menu> amenus = Lists.newArrayList();
                      for (final org.apache.maven.doxia.site.Menu menu : menus) {
                          // add in column, if matches with regex
                          if (Menu.matches(regex, menu)) {
                              amenus.add(new Menu(config, menu));
                          }
                      }
                      this.columns.add(new Column(config, amenus));
                  }
              } else {
                  final List<Menu> amenus = Lists.newArrayList();
                  for (final org.apache.maven.doxia.site.Menu menu : menus) {
                      amenus.add(new Menu(config, menu));
                  }
                  this.columns.add(new Column(config, amenus));
              }
          }
      }
  
      /**
       * @return Returns a list of {@link Column}.
       */
      public List<Column> getColumns() {
          return columns;
      }
  
      /**
      * @author Christophe Friederich
      * @since 2.0
      */
     public static class Column {
 
         /** */
         private final List<Menu> menus;
 
         /**
          * @param config
          *            a config (can not be {@code null}).
          * @param menus
          *            list of menu.
          */
         public Column(@Nonnull final ISkinConfig config, @Nonnull final List<Menu> menus) {
             requireNonNull(config);
             requireNonNull(menus);
             this.menus = menus;
         }
 
         /**
          * @return Returns a list of {@link Menu}.
          */
         public List<Menu> getMenus() {
             return menus;
         }
     }
 }