/**

  * 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.Charsets;

 import com.jcabi.aspects.Immutable;

 import com.jcabi.aspects.Loggable;

 import com.jcabi.github.Coordinates;

 import com.jcabi.github.Release;

 import com.jcabi.github.ReleaseAsset;

 import java.io.ByteArrayInputStream;

 import java.io.IOException;

 import java.io.InputStream;

 import javax.json.JsonObject;

 import lombok.EqualsAndHashCode;

 import lombok.ToString;

 import org.xembly.Directives;

 /**

  * Mock Github release asset.

  * @author Carlos Miranda (miranda.cma@gmail.com)

  * @version $Id: ad33e92a4ee59769d6dcefdd6d938fdf3b6e6ba9 $

  * @since 0.8

  */

 @Immutable

 @Loggable(Loggable.DEBUG)

 @ToString

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

 final class MkReleaseAsset implements ReleaseAsset {

     /**

      * Storage.

      */

     private final transient MkStorage storage;

     /**

      * Login of the user logged in.

      */

     private final transient String self;

     /**

      * Repository coordinates.

      */

     private final transient Coordinates coords;

     /**

      * Release id.

      */

     private final transient int rel;

     /**

      * The asset id.

      */

     private final transient int num;

     /**

      * Public ctor.

      * @param stg Storage

      * @param login User to login

      * @param rep Repo

      * @param release Release ID

      * @param asset Asset ID

      * @checkstyle ParameterNumber (7 lines)

      */

     MkReleaseAsset(

         final MkStorage stg,

         final String login,

         final Coordinates rep,

         final int release,

         final int asset

     ) {

         this.storage = stg;

         this.self = login;

         this.coords = rep;

         this.rel = release;

         this.num = asset;

     }

     @Override

     public JsonObject json() throws IOException {

         return new JsonNode(

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

         ).json();

     }

     @Override

     public void patch(

         final JsonObject json

     ) throws IOException {

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

     }

     @Override

     public Release release() {

         return new MkRelease(

             this.storage,

             this.self,

             this.coords,

             this.rel

         );

     }

     @Override

     public int number() {

         return this.num;

     }

     /**

      * Remove asset.

      *

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

      */

     @Override

     public void remove() throws IOException {

         this.storage.apply(

             new Directives().xpath(this.xpath()).strict(1).remove()

         );

     }

     /**

      * Get raw release asset content.

      *

      * @see <a href="http://developer.github.com/v3/repos/releases/">Releases API</a>

      * @return Stream with content

      * @throws IOException If some problem inside.

      */

     @Override

     public InputStream raw() throws IOException {

         return new ByteArrayInputStream(

             this.storage.xml().xpath(

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

             ).get(0).getBytes(Charsets.UTF_8)

         );

     }

     /**

      * XPath of this element in XML tree.

      * @return XPath

      */

     private String xpath() {

         return String.format(

             // @checkstyle LineLength (1 line)

             "/github/repos/repo[@coords='%s']/releases/release[id='%d']/assets/asset[id='%d']",

             this.coords, this.rel, this.num

         );

     }

 }