/*
 * 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.jclouds.cloudstack.handlers;

import java.io.IOException;

import javax.annotation.Resource;
import javax.inject.Singleton;

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.InsufficientResourcesException;
import org.jclouds.rest.ResourceNotFoundException;
import org.jclouds.util.Closeables2;
import org.jclouds.util.Strings2;

import com.google.common.base.Throwables;

@Singleton
public class CloudStackErrorHandler implements HttpErrorHandler {
   @Resource
   protected Logger logger = Logger.NULL;

   public void handleError(HttpCommand command, HttpResponse response) {
      // it is important to always read fully and close streams
      String message = parseMessage(response);
      Exception exception = message != null ? new HttpResponseException(command, response, message)
            : new HttpResponseException(command, response);
      try {
         message = message != null ? message : String.format("%s -> %s", command.getCurrentRequest().getRequestLine(),
               response.getStatusLine());
         switch (response.getStatusCode()) {
         case 400:
            exception = new IllegalArgumentException(message, exception);
            break;
         case 531:
         case 401:
            exception = new AuthorizationException(message, exception);
            break;
         case 404:
            if (!command.getCurrentRequest().getMethod().equals("DELETE")) {
               exception = new ResourceNotFoundException(message, exception);
            }
            break;
         case 405:
            exception = new IllegalArgumentException(message, exception);
            break;
         case 409:
         case 431:
            if (message.contains("does not exist")) {
               exception = new ResourceNotFoundException(message, exception);
            } else {
               exception = new IllegalStateException(message, exception);
            }
            break;
         case 534:
            if (message.contains("Maximum number of resources of type")) {
               exception = new InsufficientResourcesException(message, exception);
            }
            break;
         case 537:
            exception = new IllegalStateException(message, exception);
            break;
         }
      } finally {
         Closeables2.closeQuietly(response.getPayload());
         command.setException(exception);
      }
   }

   public String parseMessage(HttpResponse response) {
      if (response.getPayload() == null)
         return null;
      try {
         return Strings2.toStringAndClose(response.getPayload().openStream());
      } catch (IOException e) {
         throw new RuntimeException(e);
      } finally {
         try {
            response.getPayload().getInput().close();
         } catch (IOException e) {
            Throwables.propagate(e);
         }
      }
   }
}
