/*
    * Copyright (C) 2013 4th Line GmbH, Switzerland
    *
    * The contents of this file are subject to the terms of either the GNU
    * Lesser General Public License Version 2 or later ("LGPL") or the
    * Common Development and Distribution License Version 1 or later
    * ("CDDL") (collectively, the "License"). You may not use this file
    * except in compliance with the License. See LICENSE.txt for more
    * information.
   *
   * This program 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.
   */
  
  package org.fourthline.cling.support.lastchange;
  
  import org.fourthline.cling.model.types.UnsignedIntegerFourBytes;
  
  import java.util.ArrayList;
  import java.util.Iterator;
  import java.util.List;
  
  /**
   * @author Christian Bauer
   */
  public class Event {
  
      protected List<InstanceID> instanceIDs = new ArrayList<>();
  
      public Event() {
      }
  
      public Event(List<InstanceID> instanceIDs) {
          this.instanceIDs = instanceIDs;
      }
  
      public List<InstanceID> getInstanceIDs() {
          return instanceIDs;
      }
  
      public InstanceID getInstanceID(UnsignedIntegerFourBytes id) {
          for (InstanceID instanceID : instanceIDs) {
              if (instanceID.getId().equals(id)) return instanceID;
          }
          return null;
      }
  
      public void clear() {
          instanceIDs = new ArrayList<>();
      }
  
      public void setEventedValue(UnsignedIntegerFourBytes id, EventedValue ev) {
          InstanceID instanceID = null;
          for (InstanceID i : getInstanceIDs()) {
              if (i.getId().equals(id)) {
                  instanceID = i;
              }
          }
          if (instanceID == null) {
              instanceID = new InstanceID(id);
              getInstanceIDs().add(instanceID);
          }
  
          Iterator<EventedValue> it = instanceID.getValues().iterator();
          while (it.hasNext()) {
              EventedValue existingEv = it.next();
              if (existingEv.getClass().equals(ev.getClass())) {
                  it.remove();
              }
          }
          instanceID.getValues().add(ev);
      }
  
      public <EV extends EventedValue> EV getEventedValue(UnsignedIntegerFourBytes id, Class<EV> type) {
          for (InstanceID instanceID : getInstanceIDs()) {
              if (instanceID.getId().equals(id)) {
                  for (EventedValue eventedValue : instanceID.getValues()) {
                      if (eventedValue.getClass().equals(type))
                          return (EV) eventedValue;
                  }
              }
          }
          return null;
      }
  
      public boolean hasChanges() {
          for (InstanceID instanceID : instanceIDs) {
              if (instanceID.getValues().size() > 0) return true;
          }
          return false;
      }
      
  }