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/*
 * 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.gogrid.binders;

import static shaded.com.google.common.base.Preconditions.checkArgument;
import static shaded.com.google.common.base.Preconditions.checkNotNull;
import static shaded.com.google.common.base.Preconditions.checkState;
import static org.jclouds.gogrid.reference.GoGridQueryParams.REAL_IP_LIST_KEY;

import java.util.List;

import org.jclouds.gogrid.domain.IpPortPair;
import org.jclouds.http.HttpRequest;
import org.jclouds.rest.Binder;

import shaded.com.google.common.collect.ImmutableMultimap;

/**
 * Binds a list of real IPs to the request.
 * 
 * The {@link IpPortPair pairs} must have a {@link IpPortPair#ip} set with a valid IP address.
 */
public class BindRealIpPortPairsToQueryParams implements Binder {

   @SuppressWarnings({ "unchecked" })
   @Override
   public  R bindToRequest(R request, Object input) {
      checkArgument(checkNotNull(input, "input is null") instanceof List,
               "this binder is only valid for a List argument");

      List ipPortPairs = (List) input;
      ImmutableMultimap.Builder builder = ImmutableMultimap. builder();

      int i = 0;
      for (IpPortPair ipPortPair : ipPortPairs) {
         checkNotNull(ipPortPair.getIp(), "There must be an IP address defined");
         checkNotNull(ipPortPair.getIp().getIp(), "There must be an IP address defined in Ip object");
         checkState(ipPortPair.getPort() > 0, "The port number must be a positive integer");

         builder.put(REAL_IP_LIST_KEY + i + ".ip", ipPortPair.getIp().getIp());
         builder.put(REAL_IP_LIST_KEY + i + ".port", String.valueOf(ipPortPair.getPort()));
         i++;
      }
      return (R) request.toBuilder().replaceQueryParams(builder.build()).build();
   }
}