/**
    * Copyright (c) 2012-2014, 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.beanstalk.maven.plugin;
  
  import com.amazonaws.services.elasticbeanstalk.AWSElasticBeanstalk;
  import com.amazonaws.services.elasticbeanstalk.model.ApplicationVersionDescription;
  import com.amazonaws.services.elasticbeanstalk.model.CreateApplicationVersionRequest;
  import com.amazonaws.services.elasticbeanstalk.model.CreateApplicationVersionResult;
  import com.amazonaws.services.elasticbeanstalk.model.DeleteApplicationVersionRequest;
  import com.amazonaws.services.elasticbeanstalk.model.DescribeApplicationVersionsRequest;
  import com.amazonaws.services.elasticbeanstalk.model.DescribeApplicationVersionsResult;
  import com.jcabi.aspects.Loggable;
  import com.jcabi.log.Logger;
  import javax.validation.constraints.NotNull;
  import lombok.EqualsAndHashCode;
  
  /**
   * EBT application version.
   *
   * @author Yegor Bugayenko (yegor@tpc2.com)
   * @version $Id$
   * @since 0.3
   */
  @EqualsAndHashCode(of = { "client", "application", "bundle" })
  @Loggable(Loggable.DEBUG)
  final class OverridingVersion implements Version {
  
      /**
       * AWS beanstalk client.
       */
      private final transient AWSElasticBeanstalk client;
  
      /**
       * Application name.
       */
      private final transient String application;
  
      /**
       * Bundle with a file.
       */
      private final transient Bundle bundle;
  
      /**
       * Public ctor.
       * @param clnt Client
       * @param app Application name
       * @param bndl Bundle
       */
      protected OverridingVersion(@NotNull final AWSElasticBeanstalk clnt,
          @NotNull final String app, @NotNull final Bundle bndl) {
          this.client = clnt;
          this.application = app;
          this.bundle = bndl;
      }
  
      /**
       * {@inheritDoc}
       */
      @Override
      public String toString() {
          return this.bundle.name();
      }
  
      /**
       * {@inheritDoc}
       */
      @Override
      public String label() {
          if (this.exists()) {
              Logger.info(
                  this,
                  "Version '%s' already exists for '%s'",
                 this.bundle.name(),
                 this.application
             );
         } else {
             final CreateApplicationVersionResult res =
                 this.client.createApplicationVersion(
                     new CreateApplicationVersionRequest()
                         .withApplicationName(this.application)
                         .withVersionLabel(this.bundle.name())
                         .withSourceBundle(this.bundle.location())
                         .withDescription(this.bundle.etag())
                 );
             final ApplicationVersionDescription desc =
                 res.getApplicationVersion();
             Logger.info(
                 this,
                 "Version '%s' created for '%s' (%s): '%s'",
                 desc.getVersionLabel(),
                 desc.getApplicationName(),
                 this.bundle.location(),
                 desc.getDescription()
             );
             if (!desc.getVersionLabel().equals(this.bundle.name())) {
                 throw new DeploymentException(
                     String.format(
                         "version label is '%s' while '%s' expected",
                         desc.getVersionLabel(),
                         this.bundle.name()
                     )
                 );
             }
         }
         return this.bundle.name();
     }
 
     /**
      * This label exists already?
      * @return Yes or no
      */
     private boolean exists() {
         final DescribeApplicationVersionsResult res =
             this.client.describeApplicationVersions(
                 new DescribeApplicationVersionsRequest()
                     .withApplicationName(this.application)
                     .withVersionLabels(this.bundle.name())
             );
         boolean exists = false;
         if (res.getApplicationVersions().isEmpty()) {
             Logger.info(
                 this,
                 "Version '%s' is absent in '%s'",
                 this.bundle.name(),
                 this.application
             );
         } else {
             final ApplicationVersionDescription ver =
                 res.getApplicationVersions().get(0);
             if (ver.getSourceBundle().equals(this.bundle.location())
                 && ver.getDescription().equals(this.bundle.etag())) {
                 Logger.info(
                     this,
                     "Version '%s' already exists for '%s', etag='%s'",
                     ver.getVersionLabel(),
                     ver.getApplicationName(),
                     ver.getDescription()
                 );
                 exists = true;
             } else {
                 this.client.deleteApplicationVersion(
                     new DeleteApplicationVersionRequest()
                         .withApplicationName(this.application)
                         .withVersionLabel(this.bundle.name())
                 );
                 Logger.info(
                     this,
                     // @checkstyle LineLength (1 line)
                     "Version '%s' deleted in '%s' because of its outdated S3 location",
                     this.bundle.name(),
                     this.application
                 );
             }
         }
         return exists;
     }
 
 }