/**
 *
 * Copyright
 * 2009-2015 Jayway Products AB
 * 2016-2017 Föreningen Sambruk
 *
 * Licensed under AGPL, Version 3.0 (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.gnu.org/licenses/agpl.txt
 *
 * 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 se.streamsource.dci.restlet.client.responsereader;

import org.json.JSONException;
import org.json.JSONObject;
import org.qi4j.api.injection.scope.Structure;
import org.qi4j.api.structure.Module;
import org.qi4j.api.util.Iterables;
import org.qi4j.api.value.ValueComposite;
import org.restlet.Response;
import org.restlet.data.Form;
import org.restlet.data.MediaType;
import org.restlet.resource.ResourceException;
import se.streamsource.dci.restlet.client.ResponseReader;

import java.util.Iterator;

/**
 * JAVADOC
 */
public class JSONResponseReader
   implements ResponseReader
{
   @Structure
   Module module;

   public Object readResponse( Response response, Class<?> resultType )
   {
      if (response.getEntity().getMediaType().equals( MediaType.APPLICATION_JSON))
      {
         if (ValueComposite.class.isAssignableFrom( resultType ))
         {
            String jsonValue = response.getEntityAsText();
            return module.valueBuilderFactory().newValueFromJSON(resultType, jsonValue);
         } else if (resultType.equals(Form.class))
         {
            try
            {
               String jsonValue = response.getEntityAsText();
               JSONObject jsonObject = new JSONObject(jsonValue);
               Iterator keys = jsonObject.keys();
               Form form = new Form();
               while (keys.hasNext())
               {
                  Object key = keys.next();
                  form.set(key.toString(), jsonObject.get(key.toString()).toString());
               }
               return form;
            } catch (JSONException e)
            {
               throw new ResourceException(e);
            }
         }
      }

      return null;
   }
}