/**
    * This file Copyright (c) 2015-2018 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.config.source.raw;
  
  import info.magnolia.config.registry.DefinitionRawView;
  
  import java.util.Collection;
  import java.util.List;
  import java.util.Map;
  import java.util.Set;
  
  import com.google.common.collect.Collections2;
  import com.google.common.collect.Lists;
  
  /**
   * This is a read-only view on the "raw" data of a configured definition.
   */
  public class DefinitionRawViewMapWrapper implements DefinitionRawView {
  
      private final Map map;
  
      public DefinitionRawViewMapWrapper(Map map) {
          this.map = map;
      }
  
      @Override
      public List<Property> properties() {
          final Set<Map.Entry<?, ?>> entrySet = map.entrySet();
          for (Map.Entry entry : entrySet) {
              if (!(entry.getKey() instanceof String)) {
                  throw new IllegalStateException("Only support maps with String keys " + entry.getKey() + " in " + map);
              }
          }
  
          return Lists.newArrayList(Collections2.<Map.Entry, Property>transform(map.entrySet(), new ToValue()));
      }
  
      private static Property deriveValue(String name, Object o) {
          if (o instanceof Map) {
              return Property.subBean(name, new DefinitionRawViewMapWrapper((Map) o));
          } else if (o instanceof Map.Entry) {
              final Map.Entry e = (Map.Entry) o;
              return deriveValue((String) e.getKey(), e.getValue());
          } else if (o instanceof Collection) {
              return Property.collection(name, Collections2.transform((Collection) o, new ToValue()));
          } else if (o instanceof String || o instanceof Boolean || o instanceof Number) {
              return Property.simple(name, o);
          } else {
              throw new IllegalStateException("Unsupported property type in map !? " + o + "(" + o.getClass() + ")");
          }
      }
  
      private static class ToValue implements com.google.common.base.Function<Object, Property> {
          @Override
          public Property apply(Object input) {
              if (input instanceof Map) {
                  // FIXME seems similar to changes in YamlReader - separate ticket.
                  final Map map = (Map) input;
                  return deriveValue((String) map.get("name"), input);
              }
              return deriveValue(null, input);
          }
      }
  }