/*
    * Licensed to the Apache Software Foundation (ASF) under one
    * or more contributor license agreements.  See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership.  The ASF licenses this file
    * to you 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.apache.myfaces.tobago.internal.context;
  
  import org.apache.myfaces.tobago.context.ClientProperties;
  import org.apache.myfaces.tobago.context.Theme;
  import org.apache.myfaces.tobago.context.UserAgent;
  import org.apache.myfaces.tobago.util.VariableResolverUtils;
  
  import javax.faces.context.FacesContext;
  import java.io.Serializable;
  import java.util.Locale;
  import java.util.Map;
  
  public final class ClientPropertiesKey implements Serializable {
  
    private static final String KEY_IN_REQUEST = ClientPropertiesKey.class.getName();
    
    private final String contentType;
    private final Theme theme;
    private final UserAgent userAgent;
    private final Locale locale;
  
    private final int hashCode;
  
    public static ClientPropertiesKey get(FacesContext facesContext) {
      // todo later: refactor when having JSF 2.0: using attributes of facesContext
      Map<String, Object> requestMap = facesContext.getExternalContext().getRequestMap();
      ClientPropertiesKey key = (ClientPropertiesKey) requestMap.get(KEY_IN_REQUEST);
      if (key == null) {
        ClientProperties clientProperties = VariableResolverUtils.resolveClientProperties(facesContext);
        key = new ClientPropertiesKey(clientProperties);
        requestMap.put(KEY_IN_REQUEST, key);
      }
  
      return key;
    }
  
    public static void reset(FacesContext facesContext) {
      Map<String, Object> requestMap = facesContext.getExternalContext().getRequestMap();
      requestMap.remove(KEY_IN_REQUEST);
    }
    
    private ClientPropertiesKey(ClientProperties clientProperties) {
      contentType = clientProperties.getContentType();
      theme = clientProperties.getTheme();
      userAgent = clientProperties.getUserAgent();
      locale = clientProperties.getLocale();
      hashCode = calcHashCode();
    }
  
    @Override
    public boolean equals(Object o) {
      if (this == o) {
        return true;
      }
      if (o == null || getClass() != o.getClass()) {
        return false;
      }
  
      ClientPropertiesKey that = (ClientPropertiesKey) o;
  
      if (!contentType.equals(that.contentType)) {
        return false;
      }
      if (!locale.equals(that.locale)) {
        return false;
      }
      if (!theme.equals(that.theme)) {
        return false;
      }
      if (!userAgent.equals(that.userAgent)) {
        return false;
      }
  
      return true;
    }
  
    private int calcHashCode() {
      int result = contentType.hashCode();
      result = 31 * result + theme.hashCode();
      result = 31 * result + userAgent.hashCode();
     result = 31 * result + locale.hashCode();
     return result;
   }
 
   @Override
   public int hashCode() {
     return hashCode;
   }
 
   @Override
   public String toString() {
     return "ClientPropertiesKey(" + contentType + "," + theme + "," + userAgent + "," + locale + "," + hashCode + ')';
   }
 
   public String getContentType() {
     return contentType;
   }
 
   public Theme getTheme() {
     return theme;
   }
 
   public UserAgent getUserAgent() {
     return userAgent;
   }
 
   public Locale getLocale() {
     return locale;
   }
 }