/**
    * Copyright 2005-2015 The Kuali Foundation
    *
    * Licensed under the Educational Community 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.opensource.org/licenses/ecl2.php
    *
   * 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.kuali.rice.ksb.impl.bus;
  
  import org.apache.commons.codec.binary.Base64;
  import org.apache.commons.lang.StringUtils;
  import org.kuali.rice.core.api.exception.RiceRuntimeException;
  import org.kuali.rice.core.api.util.ChecksumUtils;
  import org.kuali.rice.core.api.util.RiceUtilities;
  import org.kuali.rice.ksb.api.bus.Endpoint;
  import org.kuali.rice.ksb.api.bus.ServiceConfiguration;
  import org.kuali.rice.ksb.api.bus.ServiceDefinition;
  import org.kuali.rice.ksb.api.registry.ServiceDescriptor;
  import org.kuali.rice.ksb.api.registry.ServiceEndpoint;
  import org.kuali.rice.ksb.api.registry.ServiceEndpointStatus;
  import org.kuali.rice.ksb.api.registry.ServiceInfo;
  
  import javax.xml.namespace.QName;
  import java.io.ByteArrayOutputStream;
  import java.io.IOException;
  import java.io.ObjectOutput;
  import java.io.ObjectOutputStream;
  import java.io.UnsupportedEncodingException;
  import java.security.GeneralSecurityException;
  import java.security.MessageDigest;
  
  public final class LocalService {
  	
  	private final ServiceDefinition serviceDefinition;
  	private final Endpoint endpoint;
  	private final ServiceEndpoint serviceEndpoint;
  	
  	LocalService(String instanceId, ServiceDefinition serviceDefinition) {
  		this(instanceId, serviceDefinition, null);
  	}
  	
  	LocalService(String instanceId, ServiceDefinition serviceDefinition, ServiceEndpoint serviceEndpoint) {
  		if (StringUtils.isBlank(instanceId)) {
  			throw new IllegalArgumentException("instanceId was blank or null");
  		}
  		if (serviceDefinition == null) {
  			throw new IllegalArgumentException("serviceDefinition was null");
  		}
  		this.serviceDefinition = serviceDefinition;
  		this.endpoint = serviceDefinition.establishEndpoint();
  		if (serviceEndpoint != null) {
  			this.serviceEndpoint = serviceEndpoint;
  		} else {
  			this.serviceEndpoint = constructServiceEndpoint(instanceId, this.endpoint);
  		}
  	}
  	
  	LocalService(LocalService currentLocalService, ServiceEndpoint newServiceEndpoint) {
  		this(newServiceEndpoint.getInfo().getInstanceId(), currentLocalService.getServiceDefinition(), newServiceEndpoint);
  	}
  	
  	public QName getServiceName() {
  		return endpoint.getServiceConfiguration().getServiceName();
  	}
  		
  	public ServiceDefinition getServiceDefinition() {
  		return serviceDefinition;
  	}
  	
  	public Endpoint getEndpoint() {
  		return endpoint;
  	}
  	
  	public ServiceEndpoint getServiceEndpoint() {
  		return this.serviceEndpoint;
  	}
  		
  	static ServiceEndpoint constructServiceEndpoint(String instanceId, Endpoint endpoint) {
  		ServiceInfo.Builder serviceInfo = constructServiceInfo(instanceId, endpoint.getServiceConfiguration());
  		ServiceDescriptor.Builder serviceDescriptor = constructDescriptor(endpoint.getServiceConfiguration());
  		ServiceEndpoint.Builder builder = ServiceEndpoint.Builder.create(serviceInfo, serviceDescriptor);
  		return builder.build();
  	}
  	
  	static ServiceInfo.Builder constructServiceInfo(String instanceId, ServiceConfiguration serviceConfiguration) {
  		ServiceInfo.Builder builder = ServiceInfo.Builder.create();
  		builder.setInstanceId(instanceId);
  		builder.setApplicationId(serviceConfiguration.getApplicationId());
  		builder.setChecksum(ChecksumUtils.calculateChecksum(serviceConfiguration));
  		builder.setEndpointUrl(serviceConfiguration.getEndpointUrl().toExternalForm());
  		builder.setServerIpAddress(RiceUtilities.getIpNumber());
 		builder.setServiceName(serviceConfiguration.getServiceName());
 		builder.setServiceVersion(serviceConfiguration.getServiceVersion());
 		builder.setStatus(ServiceEndpointStatus.ONLINE);
 		builder.setType(serviceConfiguration.getType());
 		return builder;
 	}
 	
 	static ServiceDescriptor.Builder constructDescriptor(ServiceConfiguration serviceConfiguration) {
 		ServiceDescriptor.Builder builder = ServiceDescriptor.Builder.create();
 		builder.setDescriptor(ServiceConfigurationSerializationHandler.marshallToXml(serviceConfiguration));
 		return builder;
 	}
 	
 }