/**

  * Copyright (c) 2013-2017, jcabi.com

  * All rights reserved.

  *

  * Redistribution and use in source and binary forms, with or without

  * modification, are permitted provided that the following conditions

  * are met: 1) Redistributions of source code must retain the above

  * copyright notice, this list of conditions and the following

  * disclaimer. 2) Redistributions in binary form must reproduce the above

  * copyright notice, this list of conditions and the following

  * disclaimer in the documentation and/or other materials provided

  * with the distribution. 3) Neither the name of the jcabi.com nor

  * the names of its contributors may be used to endorse or promote

  * products derived from this software without specific prior written

  * permission.

  *

  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT

  * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND

  * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL

  * THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,

  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES

  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR

  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,

  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED

  * OF THE POSSIBILITY OF SUCH DAMAGE.

  */

 package com.jcabi.github;

 import com.jcabi.aspects.Immutable;

 import com.jcabi.aspects.Loggable;

 import com.jcabi.http.Request;

 import com.jcabi.http.response.JsonResponse;

 import com.jcabi.http.response.RestResponse;

 import java.io.IOException;

 import java.net.HttpURLConnection;

 import javax.json.Json;

 import javax.json.JsonArrayBuilder;

 import javax.json.JsonObject;

 import javax.json.JsonStructure;

 import lombok.EqualsAndHashCode;

 /**

  * Github get labels.

  *

  * @author Yegor Bugayenko (yegor@tpc2.com)

  * @version $Id: 5561b4bbf06fd23f29c01063a3d1590d2ead13ec $

  * @since 0.1

  */

 @Immutable

 @Loggable(Loggable.DEBUG)

 @EqualsAndHashCode(of = "entry")

 final class RtIssueLabels implements IssueLabels {

     /**

      * RESTful entry.

      */

     private final transient Request entry;

     /**

      * RESTful entry.

      */

     private final transient Request request;

     /**

      * Which issue we belong to.

      */

     private final transient Issue owner;

     /**

      * Public ctor.

      * @param req Request

      * @param issue Issue we're in

      */

     RtIssueLabels(final Request req, final Issue issue) {

         this.owner = issue;

         final Coordinates coords = issue.repo().coordinates();

         this.entry = req;

         this.request = req.uri()

             .path("/repos")

             .path(coords.user())

             .path(coords.repo())

             .path("/issues")

             .path(Integer.toString(issue.number()))

             .path("/labels")

             .back();

     }

     @Override

     public String toString() {

         return this.request.uri().get().toString();

     }

     @Override

     public Issue issue() {

         return this.owner;

     }

     @Override

     public void add(final Iterable<String> labels) throws IOException {

         JsonArrayBuilder builder = Json.createArrayBuilder();

         for (final String label : labels) {

             builder = builder.add(label);

         }

         final JsonStructure json = builder.build();

         this.request.method(Request.POST)

             .body().set(json).back()

             .fetch()

             .as(RestResponse.class)

             .assertStatus(HttpURLConnection.HTTP_OK)

             .as(JsonResponse.class)

             .json().readArray();

     }

     @Override

     public void replace(final Iterable<String> labels) throws IOException {

         JsonArrayBuilder builder = Json.createArrayBuilder();

         for (final String label : labels) {

             builder = builder.add(label);

         }

         final JsonStructure json = builder.build();

         this.request.method(Request.PUT)

             .body().set(json).back()

             .fetch()

             .as(RestResponse.class)

             .assertStatus(HttpURLConnection.HTTP_OK)

             .as(JsonResponse.class)

             .json().readArray();

     }

     @Override

     public void remove(final String name) throws IOException {

         this.request.method(Request.DELETE)

             .uri().path(name).back()

             .fetch()

             .as(RestResponse.class)

             .assertStatus(HttpURLConnection.HTTP_OK);

     }

     @Override

     public void clear() throws IOException {

         this.request.method(Request.DELETE)

             .fetch()

             .as(RestResponse.class)

             .assertStatus(HttpURLConnection.HTTP_NO_CONTENT);

     }

     @Override

     public Iterable<Label> iterate() {

         return new RtPagination<Label>(

             this.request,

             new RtValuePagination.Mapping<Label, JsonObject>() {

                 @Override

                 public Label map(final JsonObject object) {

                     return new RtLabel(

                         RtIssueLabels.this.entry,

                         RtIssueLabels.this.owner.repo(),

                         object.getString("name")

                     );

                 }

             }

         );

     }

 }