/*
    * Copyright (C) 2012 Atlassian
    *
    * 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 com.atlassian.jira.rest.client.internal.async;
  
  import com.atlassian.httpclient.api.HttpClient;
  import com.atlassian.jira.rest.client.api.ProjectRolesRestClient;
  import com.atlassian.jira.rest.client.api.domain.BasicProjectRole;
  import com.atlassian.jira.rest.client.api.domain.ProjectRole;
  import com.atlassian.jira.rest.client.internal.json.BasicProjectRoleJsonParser;
  import com.atlassian.jira.rest.client.internal.json.ProjectRoleJsonParser;
  import com.atlassian.util.concurrent.Promise;
  import com.atlassian.util.concurrent.Promises;
  import com.google.common.base.Function;
  import com.google.common.collect.Iterables;
  
  import javax.ws.rs.core.UriBuilder;
  import java.net.URI;
  import java.util.Collection;
  
  /**
   * Asynchronous implementation of ProjectRolesRestClient.
   *
   * @since v2.0
   */
  public class AsynchronousProjectRolesRestClient extends AbstractAsynchronousRestClient implements ProjectRolesRestClient {
  
      private final ProjectRoleJsonParser projectRoleJsonParser;
      private final BasicProjectRoleJsonParser basicRoleJsonParser;
  
      public AsynchronousProjectRolesRestClient(final URI serverUri, final HttpClient client) {
          super(client);
          this.projectRoleJsonParser = new ProjectRoleJsonParser(serverUri);
          this.basicRoleJsonParser = new BasicProjectRoleJsonParser();
      }
  
      @Override
      public Promise<ProjectRole> getRole(URI uri) {
          return getAndParse(uri, projectRoleJsonParser);
      }
  
      @Override
      public Promise<ProjectRole> getRole(final URI projectUri, final Long roleId) {
          final URI roleUri = UriBuilder
                  .fromUri(projectUri)
                  .path("role")
                  .path(String.valueOf(roleId))
                  .build();
          return getAndParse(roleUri, projectRoleJsonParser);
      }
  
      @Override
      public Promise<Iterable<ProjectRole>> getRoles(final URI projectUri) {
          final URI rolesUris = UriBuilder
                  .fromUri(projectUri)
                  .path("role")
                  .build();
          final Promise<Collection<BasicProjectRole>> basicProjectRoles = getAndParse(rolesUris, basicRoleJsonParser);
  
          return Promises.promise(Iterables.transform(basicProjectRoles.claim(), new Function<BasicProjectRole, ProjectRole>() {
              @Override
              public ProjectRole apply(final BasicProjectRole basicProjectRole) {
                  return getRole(basicProjectRole.getSelf()).claim();
              }
          }));
      }
  }