/*
    * Copyright 2009 the original author or authors.
    * 
    * 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 org.openehealth.ipf.commons.ihe.xds.core.ebxml.ebxml30;
  
  import org.openehealth.ipf.commons.ihe.xds.core.ebxml.EbXMLSlot;
  import org.openehealth.ipf.commons.ihe.xds.core.ebxml.EbXMLSlotList;
  import org.openehealth.ipf.commons.ihe.xds.core.stub.ebrs30.rim.SlotType1;
  import org.openehealth.ipf.commons.ihe.xds.core.stub.ebrs30.rim.ValueListType;
  
  import java.util.Collections;
  import java.util.List;
  import java.util.stream.Collectors;
  
  import static org.apache.commons.lang3.Validate.notNull;
  
  /**
   * Represents a list of slots.
   * @author Jens Riemschneider
   */
  public class EbXMLSlotList30 implements EbXMLSlotList {
      private final List<SlotType1> slotListObj;
      
      /**
       * Constructs the slot list by wrapping the given ebXML 3.0 object.
       * @param slotListObj
       *          the object to wrap.
       */
      public EbXMLSlotList30(List<SlotType1> slotListObj) {
          notNull(slotListObj, "slotListObj cannot be null");
          this.slotListObj = slotListObj;
      }
      
      @Override
      public void addSlot(String slotName, String... slotValues) {
          if (slotValues == null || slotValues.length == 0) {
              return;
          }
  
          ValueListType valueList = EbXMLFactory30.RIM_FACTORY.createValueListType();
          List<String> values = valueList.getValue();
          for (String slotValue : slotValues) {
              if (slotValue != null) {
                  values.add(slotValue);
              }
          }
          
          SlotType1 slotEbXML = EbXMLFactory30.RIM_FACTORY.createSlotType1();
          slotEbXML.setName(slotName);
          slotEbXML.setValueList(valueList);        
          EbXMLSlot30 slot = new EbXMLSlot30(slotEbXML);
          
          if (!slot.getValueList().isEmpty()) {
              slotListObj.add(slotEbXML);
          }
      }
  
      @Override
      public List<String> getSlotValues(String slotName) {
          notNull(slotName, "slotName cannot be null");
          for (SlotType1 slot30 : slotListObj) {
              if (slotName.equals(slot30.getName())) {
                  return slot30.getValueList().getValue();
              }
          }
          
          return Collections.emptyList();
      }
  
      @Override
      public String getSingleSlotValue(String slotName) {
          List<String> slotValues = getSlotValues(slotName);
          return slotValues.size() > 0 ? slotValues.get(0) : null;
      }
  
      @Override
      public List<EbXMLSlot> getSlots() {
          return slotListObj.stream()
                  .map(EbXMLSlot30::new)
                  .collect(Collectors.toList());
      }
  
      @Override
      public List<EbXMLSlot> getSlots(String slotName) {
          notNull(slotName, "slotName cannot be null");
          return slotListObj.stream()
                  .filter(slot30 -> slotName.equals(slot30.getName()))
                 .map(EbXMLSlot30::new)
                 .collect(Collectors.toList());
     }
 }