/**

  * 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.RequestURI;

 import com.jcabi.http.response.RestResponse;

 import java.io.IOException;

 import java.net.HttpURLConnection;

 import java.util.Map;

 import javax.json.JsonObject;

 import javax.ws.rs.core.HttpHeaders;

 import lombok.EqualsAndHashCode;

 /**

  * Commits of a Github repository.

  * @author Alexander Sinyagin (sinyagin.alexander@gmail.com)

  * @version $Id: c84c6d90fcad87207ab70cbe69b2aaa3a79629ba $

  * @checkstyle MultipleStringLiteralsCheck (200 lines)

  */

 @Immutable

 @Loggable(Loggable.DEBUG)

 @EqualsAndHashCode(of = { "request", "owner", "entry" })

 final class RtRepoCommits implements RepoCommits {

     /**

      * RESTful API entry point.

      */

     private final transient Request entry;

     /**

      * RESTful request for the commits.

      */

     private final transient Request request;

     /**

      * RESTful request for the comparison.

      */

     private final transient Request comp;

     /**

      * Parent repository.

      */

     private final transient Repo owner;

     /**

      * Public ctor.

      * @param req Entry point of API

      * @param repo Repository

      */

     RtRepoCommits(final Request req, final Repo repo) {

         this.entry = req;

         this.owner = repo;

         final RequestURI rep = req.uri()

             .path("/repos")

             .path(repo.coordinates().user())

             .path(repo.coordinates().repo());

         this.request = rep

             .path("/commits")

             .back();

         this.comp = rep

             .path("/compare")

             .back();

     }

     @Override

     public  Iterable<RepoCommit> iterate(

         final Map<String, String> params

     ) {

         return new RtPagination<RepoCommit>(

             this.request.uri().queryParams(params).back(),

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

                 @Override

                 public RepoCommit map(final JsonObject value) {

                     return RtRepoCommits.this.get(value.getString("sha"));

                 }

             }

         );

     }

     @Override

     public RepoCommit get(

         final String sha

     ) {

         return new RtRepoCommit(this.entry, this.owner, sha);

     }

     @Override

     public CommitsComparison compare(

         final String base,

         final String head) {

         return new RtCommitsComparison(this.entry, this.owner, base, head);

     }

     @Override

     public String diff(

         final String base,

         final String head)

         throws IOException {

         return this.comp.reset(HttpHeaders.ACCEPT)

             .header(HttpHeaders.ACCEPT, "application/vnd.github.v3.diff")

             .uri()

             .path(String.format("%s...%s", base, head))

             .back()

             .fetch().as(RestResponse.class)

             .assertStatus(HttpURLConnection.HTTP_OK)

             .body();

     }

     @Override

     public String patch(

         final String base,

         final String head)

         throws IOException {

         return this.comp.reset(HttpHeaders.ACCEPT)

             .header(HttpHeaders.ACCEPT, "application/vnd.github.v3.patch")

             .uri()

             .path(String.format("%s...%s", base, head))

             .back()

             .fetch().as(RestResponse.class)

             .assertStatus(HttpURLConnection.HTTP_OK)

             .body();

     }

     @Override

     public String toString() {

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

     }

     @Override

     public JsonObject json() throws IOException {

         return new RtJson(this.request).fetch();

     }

 }