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/*
 * Sonatype Nexus (TM) Open Source Version
 * Copyright (c) 2008-present Sonatype, Inc.
 * All rights reserved. Includes the third-party code listed at http://links.sonatype.com/products/nexus/oss/attributions.
 *
 * This program and the accompanying materials are made available under the terms of the Eclipse Public License Version 1.0,
 * which accompanies this distribution and is available at http://www.eclipse.org/legal/epl-v10.html.
 *
 * Sonatype Nexus (TM) Professional Version is available from Sonatype, Inc. "Sonatype" and "Sonatype Nexus" are trademarks
 * of Sonatype, Inc. Apache Maven is a trademark of the Apache Software Foundation. M2eclipse is a trademark of the
 * Eclipse Foundation. All other trademarks are the property of their respective owners.
 */
package org.torquebox.mojo.rubygems;

import java.io.InputStream;

import org.jruby.embed.ScriptingContainer;

public class DefaultRubygemsGateway
    implements RubygemsGateway
{
  private final ScriptingContainer container;
  private Object dependencyHelperImplClass;
  private Object gemspecHelperImplClass;
  private Object specsHelperImplClass;
  private Object mergeSpecsHelperImplClass;
  private Object dependencyDataImplClass;

  /**
   * Ctor that accepts prepared non-null scripting container.
   */
  public DefaultRubygemsGateway(final ScriptingContainer container) {
    this.container = container;
    dependencyHelperImplClass = container.runScriptlet("require 'nexus/dependency_helper_impl';"
        + "Nexus::DependencyHelperImpl");
    gemspecHelperImplClass = container.runScriptlet("require 'nexus/gemspec_helper_impl';"
        + "Nexus::GemspecHelperImpl");
    specsHelperImplClass = container.runScriptlet("require 'nexus/specs_helper_impl';"
        + "Nexus::SpecsHelperImpl");
    mergeSpecsHelperImplClass = container.runScriptlet("require 'nexus/merge_specs_helper_impl';"
        + "Nexus::MergeSpecsHelperImpl");
    dependencyDataImplClass = container.runScriptlet("require 'nexus/dependency_data_impl';"
        + "Nexus::DependencyDataImpl");
  }

  @Override
  public void terminate() {
    dependencyHelperImplClass = null;
    gemspecHelperImplClass = null;
    specsHelperImplClass = null;
    mergeSpecsHelperImplClass = null;
    dependencyDataImplClass = null;
    container.terminate();
  }

  @Override
  public SpecsHelper newSpecsHelper() {
    return container.callMethod(specsHelperImplClass, "new", SpecsHelper.class);
  }

  @Override
  public MergeSpecsHelper newMergeSpecsHelper() {
    return container.callMethod(mergeSpecsHelperImplClass, "new", MergeSpecsHelper.class);
  }

  @Override
  public DependencyHelper newDependencyHelper() {
    return container.callMethod(dependencyHelperImplClass, "new", DependencyHelper.class);
  }

  @Override
  public GemspecHelper newGemspecHelper(InputStream gemspec) {
    return container.callMethod(gemspecHelperImplClass, "from_gemspec_rz", gemspec, GemspecHelper.class);
  }

  @Override
  public GemspecHelper newGemspecHelperFromGem(InputStream gem) {
    return container.callMethod(gemspecHelperImplClass, "from_gem", gem, GemspecHelper.class);
  }

  @Override
  public DependencyData newDependencyData(InputStream dependency, String name, long modified) {
    return container.callMethod(dependencyDataImplClass, "new", new Object[]{dependency, name, modified},
        DependencyData.class);
  }
}