/*
    * Copyright 2016 Function1. All Rights Reserved.
    *
    * Licensed 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 tools.gsf.navigation.siteplan;
  
  import java.util.ArrayList;
  import java.util.List;
  import java.util.stream.Collectors;
  
  import com.fatwire.assetapi.data.AssetId;
  
  import tools.gsf.navigation.AssetNode;
  import tools.gsf.navigation.ConfigurableNode;
  
  /**
   * Simple node, representing an asset, that can be populated with asset data.
   *  
   * It is up to the concrete class extending this base class to decide what data to
   * expose and how.
   * 
   * This base class just deals with the annoying stuff required by most (all?)
   * AssetNode implementations.
   *  
   * @author Freddy Villalba
   * @since 2017-03-02.
   */
  public abstract class AbstractAssetNode<N extends AssetNode<N> & ConfigurableNode<N>> implements AssetNode<N>, ConfigurableNode<N> {
  
  	private static final long serialVersionUID = -7637446633778028560L;
  
  	protected AssetId id;
  	protected N parent = null;
  	protected ArrayList<N> children = new ArrayList<>();
  
  	public AbstractAssetNode(AssetId assetId) {
  		this.id = assetId;		
  	}
  
  	public AssetId getId() {
  		return this.id;
  	}
  	
  	@Override
  	public void addChild(N node) {
  		children.add(node);
  	}
  
  	@Override
      public void setParent(N parent) {
          this.parent = parent;
      }
  	
  	@Override
  	public void removeChildren() {
  		for (N child : this.children) {
  			child.setParent(null);
  		}
  		this.children.clear();
  	}
  	
  	public boolean removeChild(N child) {
  		return this.children.remove(child);
  	}
  	
  	@Override
      public N getParent() {
          return parent;
      }
  
  	@Override
      public List<N> getSiblings() {
          return parent.getChildren();
      }
  
  	@Override
      public List<N> getChildren() {
          return children.stream().filter(n -> n != null).collect(Collectors.toList());
      }
  	
      @Override
      public boolean equals(Object o) {
          if (this == o) {
              return true;
          }
          if (o == null || getClass() != o.getClass()) {
              return false;
          }
 
         AssetNode<?> that = (AssetNode<?>) o;
 
         if (! this.id.equals(that.getId())) {
             return false;
         }
         if (this.parent != null ? !this.parent.equals(that.getParent()) : that.getParent() != null) {
             return false;
         }
         return this.children.equals(that.getChildren());
 
     }
 
     @Override
     public int hashCode() {
         int result = this.id.hashCode();
         result = 31 * result + (this.parent != null ? this.parent.getId().hashCode() : 0);
         result = 31 * result + this.children.hashCode();
         return result;
     }
 
 }