/**
    *
    * Copyright (C) 2011 Cloud Conscious, LLC. <info@cloudconscious.com>
    *
    * ====================================================================
    * 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.jclouds.vcloud.handlers;
  
  import static org.jclouds.http.HttpUtils.releasePayload;
  
  import java.io.IOException;
  import java.util.regex.Matcher;
  import java.util.regex.Pattern;
  
  import javax.annotation.Resource;
  import javax.inject.Inject;
  import javax.inject.Singleton;
  
  import org.jclouds.http.HttpCommand;
  import org.jclouds.http.HttpErrorHandler;
  import org.jclouds.http.HttpRequest;
  import org.jclouds.http.HttpResponse;
  import org.jclouds.http.HttpResponseException;
  import org.jclouds.logging.Logger;
  import org.jclouds.rest.AuthorizationException;
  import org.jclouds.rest.ResourceNotFoundException;
  import org.jclouds.util.Strings2;
  import org.jclouds.vcloud.VCloudMediaType;
  import org.jclouds.vcloud.VCloudResponseException;
  import org.jclouds.vcloud.domain.VCloudError;
  import org.jclouds.vcloud.domain.VCloudError.MinorCode;
  import org.jclouds.vcloud.util.VCloudUtils;
  
  /**
   * This will parse and set an appropriate exception on the command object.
   * 
   * @author Adrian Cole
   * 
   */
  @Singleton
  public class ParseVCloudErrorFromHttpResponse implements HttpErrorHandler {
     @Resource
     protected Logger logger = Logger.NULL;
     public static final Pattern RESOURCE_PATTERN = Pattern.compile(".*/v[^/]+/([^/]+)/([0-9]+)");
     private final VCloudUtils utils;
  
     @Inject
     public ParseVCloudErrorFromHttpResponse(VCloudUtils utils) {
        this.utils = utils;
     }
  
     public void handleError(HttpCommand command, HttpResponse response) {
        HttpRequest request = command.getCurrentRequest();
        Exception exception = new HttpResponseException(command, response);
        try {
           VCloudError error = null;
           String message = null;
           if (response.getPayload() != null) {
              String contentType = response.getPayload().getContentMetadata().getContentType();
              if (VCloudMediaType.ERROR_XML.equals(contentType)) {
                 error = utils.parseErrorFromContent(request, response);
                 if (error != null) {
                    message = error.getMessage();
                    exception = new VCloudResponseException(command, response, error);
                 }
              } else {
                 try {
                    message = Strings2.toStringAndClose(response.getPayload().getInput());
                    exception = message != null ? new HttpResponseException(command, response, message) : exception;
                 } catch (IOException e) {
                 }
              }
           }
           message = message != null ? message : String.format("%s -> %s", request.getRequestLine(), response
                    .getStatusLine());
  
           switch (response.getStatusCode()) {
              case 400:
                 if (error != null
                          && (error.getMinorErrorCode() != null && error.getMinorErrorCode() == MinorCode.BUSY_ENTITY)
                          || (error.getMessage() != null && error.getMessage().indexOf("is not running") != -1))
                    exception = new IllegalStateException(message, exception);
                 else
                    exception = new IllegalArgumentException(message, exception);
                 break;
              case 401:
              case 403:
                exception = new AuthorizationException(exception.getMessage(), exception);
                break;
             case 404:
                if (!command.getCurrentRequest().getMethod().equals("DELETE")) {
                   String path = command.getCurrentRequest().getEndpoint().getPath();
                   Matcher matcher = RESOURCE_PATTERN.matcher(path);
                   if (matcher.find()) {
                      message = String.format("%s %s not found", matcher.group(1), matcher.group(2));
                   } else {
                      message = path;
                   }
                   exception = new ResourceNotFoundException(message);
                }
                break;
          }
       } finally {
          releasePayload(response);
          command.setException(exception);
       }
    }
 }