/**

  * 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.mock;

 import com.google.common.base.Optional;

 import com.jcabi.aspects.Immutable;

 import com.jcabi.aspects.Loggable;

 import com.jcabi.github.Comments;

 import com.jcabi.github.Coordinates;

 import com.jcabi.github.Event;

 import com.jcabi.github.Issue;

 import com.jcabi.github.IssueLabels;

 import com.jcabi.github.Label;

 import com.jcabi.github.Repo;

 import com.jcabi.xml.XML;

 import java.io.IOException;

 import java.util.Map;

 import javax.json.Json;

 import javax.json.JsonArrayBuilder;

 import javax.json.JsonObject;

 import javax.json.JsonObjectBuilder;

 import javax.json.JsonValue;

 import lombok.EqualsAndHashCode;

 /**

  * Mock Github issue.

  *

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

  * @version $Id: a27946c55d6f51aa6f93db3d2b27427be192a443 $

  * @since 0.5

  * @checkstyle ClassDataAbstractionCoupling (500 lines)

  */

 @Immutable

 @Loggable(Loggable.DEBUG)

 @EqualsAndHashCode(of = { "storage", "self", "coords", "num" })

 @SuppressWarnings("PMD.TooManyMethods")

 final class MkIssue implements Issue {

     /**

      * Storage.

      */

     private final transient MkStorage storage;

     /**

      * Login of the user logged in.

      */

     private final transient String self;

     /**

      * Repo name.

      */

     private final transient Coordinates coords;

     /**

      * Issue number.

      */

     private final transient int num;

     /**

      * Public ctor.

      * @param stg Storage

      * @param login User to login

      * @param rep Repo

      * @param number Issue number

      * @checkstyle ParameterNumber (5 lines)

      */

     MkIssue(

         final MkStorage stg,

         final String login,

         final Coordinates rep,

         final int number

     ) {

         this.storage = stg;

         this.self = login;

         this.coords = rep;

         this.num = number;

     }

     @Override

     public String toString() {

         return Integer.toString(this.num);

     }

     @Override

     public Repo repo() {

         return new MkRepo(this.storage, this.self, this.coords);

     }

     @Override

     public int number() {

         return this.num;

     }

     @Override

     public Comments comments() {

         try {

             return new MkComments(

                 this.storage, this.self, this.coords, this.num

             );

         } catch (final IOException ex) {

             throw new IllegalStateException(ex);

         }

     }

     @Override

     public IssueLabels labels() {

         try {

             return new MkIssueLabels(

                 this.storage, this.self, this.coords, this.num

             );

         } catch (final IOException ex) {

             throw new IllegalStateException(ex);

         }

     }

     @Override

     public Iterable<Event> events() throws IOException {

         return new MkIterable<Event>(

             this.storage,

             String.format(

                 // @checkstyle LineLength (1 line)

                 "/github/repos/repo[@coords='%s']/issue-events/issue-event[issue='%s']",

                 this.coords,

                 this.num

             ),

             new MkIssueEventMapping(this)

         );

     }

     @Override

     public boolean exists() throws IOException {

         return this.storage.xml().xpath(

             String.format("%s/number/text()", this.xpath())

         ).size() == 1;

     }

     @Override

     public int compareTo(

         final Issue issue

     ) {

         return this.number() - issue.number();

     }

     @Override

     public void patch(

         final JsonObject json

     ) throws IOException {

         final Issue.Smart smart = new Issue.Smart(this);

         final boolean was = smart.isOpen();

         new JsonPatch(this.storage).patch(this.xpath(), json);

         final boolean now = smart.isOpen();

         if (now != was) {

             final String type;

             if (now) {

                 type = Event.REOPENED;

             } else {

                 type = Event.CLOSED;

             }

             new MkIssueEvents(this.storage, this.self, this.coords)

                 .create(type, this.num, this.self, Optional.<String>absent());

         }

     }

     @Override

     public JsonObject json() throws IOException {

         final XML xml = this.storage.xml();

         final JsonObject obj = new JsonNode(

             xml.nodes(this.xpath()).get(0)

         ).json();

         final JsonObjectBuilder json = Json.createObjectBuilder();

         for (final Map.Entry<String, JsonValue> val: obj.entrySet()) {

             json.add(val.getKey(), val.getValue());

         }

         final JsonArrayBuilder array = Json.createArrayBuilder();

         for (final Label label : this.labels().iterate()) {

             array.add(

                 Json.createObjectBuilder().add("name", label.name()).build()

             );

         }

         final JsonObjectBuilder res = json

             .add("labels", array)

             .add(

                 // @checkstyle MultipleStringLiteralsCheck (1 line)

                 "assignee",

                 Json.createObjectBuilder().add(

                     "login", obj.getString("assignee", "")

                 ).build()

             );

         final JsonObjectBuilder pull = Json.createObjectBuilder();

         final String html = "html_url";

         if (xml.nodes(

                 String.format(

                     // @checkstyle LineLengthCheck (1 line)

                     "/github/repos/repo[@coords='%s']/pulls/pull/number[text() = '%d']",

                     this.coords,

                     this.num

                 )

             ).isEmpty()) {

             pull.addNull(html);

         } else {

             pull.add(

                 html,

                 String.format(

                     "https://%s/pulls/%d",

                     this.coords,

                     this.num

                 )

             );

         }

         return res.add("pull_request", pull.build()).build();

     }

     /**

      * XPath of this element in XML tree.

      * @return XPath

      */

     private String xpath() {

         return String.format(

             "/github/repos/repo[@coords='%s']/issues/issue[number='%d']",

             this.coords, this.num

         );

     }

     private static class MkIssueEventMapping

         implements MkIterable.Mapping<Event> {

         /**

          * Issue events.

          */

         private final transient MkIssueEvents evts;

         /**

          * Constructor.

          * @param issue Mock issue to get events from

          * @throws IOException If there is any I/O problem

          */

         public MkIssueEventMapping(

             final MkIssue issue

         ) throws IOException {

             this.evts = new MkIssueEvents(

                 issue.storage,

                 issue.self,

                 issue.coords

             );

         }

         @Override

         public Event map(

             final XML xml

         ) {

             return this.evts.get(

                 Integer.parseInt(xml.xpath("number/text()").get(0))

             );

         }

     }

 }