/*
    * This file is part of ***  M y C o R e  ***
    * See http://www.mycore.de/ for details.
    *
    * MyCoRe is free software: you can redistribute it and/or modify
    * it under the terms of the GNU General Public License as published by
    * the Free Software Foundation, either version 3 of the License, or
    * (at your option) any later version.
    *
   * MyCoRe 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 General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with MyCoRe.  If not, see <http://www.gnu.org/licenses/>.
   */
  
  package org.mycore.frontend.classeditor;
  
  import static org.mycore.frontend.classeditor.json.MCRJSONCategoryHelper.PROP_CHILDREN;
  import static org.mycore.frontend.classeditor.json.MCRJSONCategoryHelper.PROP_HAS_LINK;
  import static org.mycore.frontend.classeditor.json.MCRJSONCategoryHelper.PROP_ID;
  import static org.mycore.frontend.classeditor.json.MCRJSONCategoryHelper.PROP_LABELS;
  import static org.mycore.frontend.classeditor.json.MCRJSONCategoryHelper.PROP_PARENTID;
  import static org.mycore.frontend.classeditor.json.MCRJSONCategoryHelper.PROP_POSITION;
  import static org.mycore.frontend.classeditor.json.MCRJSONCategoryHelper.PROP_URISTR;
  
  import java.lang.reflect.Type;
  import java.net.URI;
  import java.util.List;
  import java.util.Map;
  import java.util.SortedSet;
  
  import org.mycore.common.MCRJSONTypeAdapter;
  import org.mycore.common.config.MCRConfiguration2;
  import org.mycore.datamodel.classifications2.MCRCategLinkService;
  import org.mycore.datamodel.classifications2.MCRCategLinkServiceFactory;
  import org.mycore.datamodel.classifications2.MCRCategory;
  import org.mycore.datamodel.classifications2.MCRCategoryID;
  import org.mycore.datamodel.classifications2.MCRLabel;
  import org.mycore.frontend.classeditor.json.MCRJSONCategory;
  import org.mycore.frontend.classeditor.wrapper.MCRCategoryListWrapper;
  import org.mycore.frontend.classeditor.wrapper.MCRLabelSetWrapper;
  
  import com.google.gson.JsonDeserializationContext;
  import com.google.gson.JsonElement;
  import com.google.gson.JsonObject;
  import com.google.gson.JsonParseException;
  import com.google.gson.JsonSerializationContext;
  
  public class MCRCategoryTypeAdapter extends MCRJSONTypeAdapter<MCRJSONCategory> {
      private MCRCategLinkService linkService;
  
      @Override
      public MCRJSONCategory deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context)
          throws JsonParseException {
          JsonObject categJsonObject = json.getAsJsonObject();
          MCRJSONCategory deserializedCateg = new MCRJSONCategory();
  
          JsonElement idJsonElement = categJsonObject.get(PROP_ID);
          if (idJsonElement != null) {
              MCRCategoryID id = context.deserialize(idJsonElement, MCRCategoryID.class);
              deserializedCateg.setId(id);
          }
  
          JsonElement parentIdJsonElement = categJsonObject.get(PROP_PARENTID);
          if (parentIdJsonElement != null) {
              MCRCategoryID parentId = context.deserialize(parentIdJsonElement, MCRCategoryID.class);
              deserializedCateg.setParentID(parentId);
          }
  
          JsonElement positionJsonElem = categJsonObject.get(PROP_POSITION);
          if (positionJsonElem != null) {
              deserializedCateg.setPositionInParent(positionJsonElem.getAsInt());
          }
  
          JsonElement labelSetWrapperElem = categJsonObject.get(PROP_LABELS);
          if (labelSetWrapperElem != null) {
              MCRLabelSetWrapper labelSetWrapper = context.deserialize(labelSetWrapperElem, MCRLabelSetWrapper.class);
              deserializedCateg.setLabels(labelSetWrapper.getSet());
          }
  
          JsonElement uriJsonElement = categJsonObject.get(PROP_URISTR);
          if (uriJsonElement != null) {
              String uriStr = uriJsonElement.getAsString();
              deserializedCateg.setURI(URI.create(uriStr));
          }
  
          return deserializedCateg;
      }
  
      @Override
      public JsonElement serialize(MCRJSONCategory category, Type arg1, JsonSerializationContext contextSerialization) {
          JsonObject rubricJsonObject = new JsonObject();
          MCRCategoryID id = category.getId();
          if (id != null) {
              rubricJsonObject.add(PROP_ID, contextSerialization.serialize(id));
          }
 
         SortedSet<MCRLabel> labels = category.getLabels();
         rubricJsonObject.add(PROP_LABELS, contextSerialization.serialize(new MCRLabelSetWrapper(labels)));
         URI uri = category.getURI();
         if (uri != null) {
             rubricJsonObject.addProperty(PROP_URISTR, uri.toString());
         }
 
         if (category.hasChildren()) {
             List<MCRCategory> children = category.getChildren();
             Map<MCRCategoryID, Boolean> linkMap = getLinkService().hasLinks(category);
             if (linkMap.containsValue(true)) {
                 rubricJsonObject.addProperty(PROP_HAS_LINK, true);
             }
             rubricJsonObject.add(PROP_CHILDREN,
                 contextSerialization.serialize(new MCRCategoryListWrapper(children, linkMap)));
         }
 
         return rubricJsonObject;
     }
 
     private MCRCategLinkService getLinkService() {
         if (linkService == null) {
             linkService = MCRConfiguration2.<MCRCategLinkService>getInstanceOf("Category.Link.Service")
                 .orElseGet(MCRCategLinkServiceFactory::getInstance);
         }
 
         return linkService;
     }
 }