/**
    *
    * 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.azure.storage.handlers;
  
  import static org.jclouds.http.HttpUtils.releasePayload;
  
  import java.io.IOException;
  import java.util.regex.Pattern;
  
  import javax.annotation.Resource;
  import javax.inject.Inject;
  
  import org.jclouds.azure.storage.AzureStorageResponseException;
  import org.jclouds.azure.storage.domain.AzureStorageError;
  import org.jclouds.azure.storage.util.AzureStorageUtils;
  import org.jclouds.http.HttpCommand;
  import org.jclouds.http.HttpErrorHandler;
  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;
  
  /**
   * This will parse and set an appropriate exception on the command object.
   * 
   * @see AzureStorageError
   * @author Adrian Cole
   * 
   */
  public class ParseAzureStorageErrorFromXmlContent implements HttpErrorHandler {
     @Resource
     protected Logger logger = Logger.NULL;
  
     private final AzureStorageUtils utils;
  
     @Inject
     public ParseAzureStorageErrorFromXmlContent(AzureStorageUtils utils) {
        this.utils = utils;
     }
  
     public static final Pattern CONTAINER_PATH = Pattern.compile("^[/]?([^/]+)$");
     public static final Pattern CONTAINER_KEY_PATH = Pattern.compile("^[/]?([^/]+)/(.*)$");
  
     public void handleError(HttpCommand command, HttpResponse response) {
        Exception exception = new HttpResponseException(command, response);
        String message = null;
        AzureStorageError error = null;
        try {
           if (response.getPayload() != null) {
              String contentType = response.getPayload().getContentMetadata().getContentType();
              if (contentType != null && (contentType.indexOf("xml") != -1 || contentType.indexOf("unknown") != -1)
                       && !new Long(0).equals(response.getPayload().getContentMetadata().getContentLength())) {
                 try {
                    error = utils.parseAzureStorageErrorFromContent(command, response, response.getPayload().getInput());
                    if (error != null) {
                       message = error.getMessage();
                       exception = new AzureStorageResponseException(command, response, error);
                    }
                 } catch (RuntimeException e) {
                    try {
                       message = Strings2.toStringAndClose(response.getPayload().getInput());
                       exception = new HttpResponseException(command, response, message);
                    } catch (IOException e1) {
                    }
                 }
              } else {
                 try {
                    message = Strings2.toStringAndClose(response.getPayload().getInput());
                    exception = new HttpResponseException(command, response, message);
                 } catch (IOException e) {
                 }
              }
           }
           message = message != null ? message : String.format("%s -> %s", command.getCurrentRequest().getRequestLine(),
                    response.getStatusLine());
           exception = refineException(command, response, exception, error, message);
        } finally {
           releasePayload(response);
           command.setException(exception);
        }
     }
 
    protected Exception refineException(HttpCommand command, HttpResponse response, Exception exception,
             AzureStorageError error, String message) {
       switch (response.getStatusCode()) {
          case 401:
             exception = new AuthorizationException(message, exception);
             break;
          case 404:
             if (!command.getCurrentRequest().getMethod().equals("DELETE")) {
                exception = new ResourceNotFoundException(message, exception);
             }
             break;
          case 411:
             exception = new IllegalArgumentException(message);
             break;
       }
       return exception;
    }
 
 }