/*
    * #%L
    * wcm.io
    * %%
    * Copyright (C) 2015 wcm.io
    * %%
    * 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.
   * #L%
   */
  package io.wcm.caravan.hal.docs.impl.model;
  
  import java.util.Iterator;
  import java.util.List;
  import java.util.SortedSet;
  import java.util.TreeSet;
  
  import org.apache.commons.lang3.StringUtils;
  
  import com.google.common.collect.ImmutableList;
  
  /**
   * Describes a HAL RESTful service.
   */
  public class Service {
  
    private String serviceId;
    private String name;
    private String descriptionMarkup;
    private SortedSet<LinkRelation> linkRelations = new TreeSet<>();
  
    public String getServiceId() {
      return this.serviceId;
    }
  
    public void setServiceId(String serviceId) {
      this.serviceId = serviceId;
    }
  
    public String getName() {
      return this.name;
    }
  
    public void setName(String name) {
      this.name = name;
    }
  
    public String getDescriptionMarkup() {
      return this.descriptionMarkup;
    }
  
    public void setDescriptionMarkup(String descriptionMarkup) {
      this.descriptionMarkup = descriptionMarkup;
    }
  
    public List<LinkRelation> getLinkRelations() {
      return ImmutableList.copyOf(this.linkRelations);
    }
  
    /**
     * @param linkRelation Link relation to add
     */
    public void addLinkRelation(LinkRelation linkRelation) {
      this.linkRelations.add(linkRelation);
    }
  
    /**
     * Resolves all nested link relations.
     */
    public void resolve() {
      linkRelations.stream().forEach(this::resolve);
    }
  
    /**
     * Iterates over nested link relations. If they are valid filename is set and decription inherited (if empty).
     * Invalid ones are removed.
     * @param rel Link relations
     */
    private void resolve(LinkRelation rel) {
      Iterator<LinkRelationRef> refs = rel.getLinkRelationRefs().iterator();
      while (refs.hasNext()) {
        LinkRelationRef ref = refs.next();
        LinkRelation referencedRel = linkRelations.stream()
            .filter(item -> StringUtils.equals(item.getRel(), ref.getRel()))
            .findFirst().orElse(null);
        if (referencedRel == null) {
          refs.remove();
        }
        else {
          if (StringUtils.isBlank(ref.getShortDescription())) {
           ref.setShortDescription(referencedRel.getShortDescription());
         }
       }
     }
   }
 
 }