/*
 * 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.openstack.nova.v2_0.extensions;

import javax.inject.Named;
import javax.ws.rs.Consumes;
import javax.ws.rs.DELETE;
import javax.ws.rs.GET;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;

import org.jclouds.Fallbacks.EmptyFluentIterableOnNotFoundOr404;
import org.jclouds.Fallbacks.FalseOnNotFoundOr404;
import org.jclouds.Fallbacks.NullOnNotFoundOr404;
import org.jclouds.javax.annotation.Nullable;
import org.jclouds.openstack.keystone.auth.filters.AuthenticateRequest;
import org.jclouds.openstack.nova.v2_0.binders.BindKeyPairToJsonPayload;
import org.jclouds.openstack.nova.v2_0.domain.KeyPair;
import org.jclouds.openstack.nova.v2_0.functions.internal.ParseKeyPairs;
import org.jclouds.openstack.v2_0.ServiceType;
import org.jclouds.openstack.v2_0.services.Extension;
import org.jclouds.rest.annotations.Fallback;
import org.jclouds.rest.annotations.MapBinder;
import org.jclouds.rest.annotations.Payload;
import org.jclouds.rest.annotations.PayloadParam;
import org.jclouds.rest.annotations.RequestFilters;
import org.jclouds.rest.annotations.ResponseParser;
import org.jclouds.rest.annotations.SelectJson;

import com.google.common.annotations.Beta;
import com.google.common.collect.FluentIterable;

/**
 * Provides access to the OpenStack Compute (Nova) Key Pair Extension API.
 */
@Beta
@Extension(of = ServiceType.COMPUTE, namespace = ExtensionNamespaces.KEYPAIRS,
      name = ExtensionNames.KEYPAIRS, alias = ExtensionAliases.KEYPAIRS)
@RequestFilters(AuthenticateRequest.class)
@Consumes(MediaType.APPLICATION_JSON)
@Path("/os-keypairs")
public interface KeyPairApi {
   /**
    * Lists all Key Pairs.
    *
    * @return all Key Pairs
    */
   @Named("keypair:list")
   @GET
   @ResponseParser(ParseKeyPairs.class)
   @Fallback(EmptyFluentIterableOnNotFoundOr404.class)
   FluentIterable<KeyPair> list();

   /**
    * Creates a {@link KeyPair}.
    *
    * @return the created {@link KeyPair}.
    */
   @Named("keypair:create")
   @POST
   @SelectJson("keypair")
   @Produces(MediaType.APPLICATION_JSON)
   @Payload("%7B\"keypair\":%7B\"name\":\"{name}\"%7D%7D")
   KeyPair create(@PayloadParam("name") String name);


   /**
    * Creates a {@link KeyPair} with a public key.
    *
    * @return the created {@link KeyPair}.
    */
   @Named("keypair:create")
   @POST
   @SelectJson("keypair")
   @Produces(MediaType.APPLICATION_JSON)
   @MapBinder(BindKeyPairToJsonPayload.class)
   KeyPair createWithPublicKey(@PayloadParam("name") String name,
         @PayloadParam("public_key") String publicKey);

   /**
    * Gets a specific {@link KeyPair} by name.
    *
    * @param name
    *           the name of the {@link KeyPair}
    *
    * @return the specified {@link KeyPair}, otherwise null.
    */
   @Named("keypair:get")
   @GET
   @Path("/{name}")
   @SelectJson("keypair")
   @Consumes(MediaType.APPLICATION_JSON)
   @Fallback(NullOnNotFoundOr404.class)
   @Nullable
   KeyPair get(@PathParam("name") String name);

   /**
    * Deletes a {@link KeyPair}.
    *
    * @param name
    *           the name of the {@link KeyPair}
    *
    * @return {@code true} if the {@link KeyPair} was deleted, otherwise {@code false}.
    */
   @Named("keypair:delete")
   @DELETE
   @Path("/{name}")
   @Fallback(FalseOnNotFoundOr404.class)
   boolean delete(@PathParam("name") String name);
}