/*
 * 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.azurecompute.arm.exceptions;

import org.jclouds.http.HttpResponse;
import org.jclouds.rest.RateLimitExceededException;

import com.google.common.annotations.Beta;
import com.google.common.base.Predicate;
import com.google.common.collect.Multimap;
import com.google.common.collect.Multimaps;

/**
 * Provides detailed information for rate limit exceptions.
 */
@Beta
public class AzureComputeRateLimitExceededException extends RateLimitExceededException {
   private static final long serialVersionUID = 1L;
   private static final String RATE_LIMIT_HEADER_PREFIX = "x-ms-ratelimit-remaining-";

   public AzureComputeRateLimitExceededException(HttpResponse response) {
      super(response.getStatusLine() + "\n" + rateLimitHeaders(response));
   }

   public AzureComputeRateLimitExceededException(HttpResponse response, Throwable cause) {
      super(response.getStatusLine() + "\n" + rateLimitHeaders(response), cause);
   }

   private static Multimap<String, String> rateLimitHeaders(HttpResponse response) {
      return Multimaps.filterKeys(response.getHeaders(), new Predicate<String>() {
         @Override
         public boolean apply(String input) {
            return input.startsWith(RATE_LIMIT_HEADER_PREFIX);
         }
      });
   }
}
