/*
    * Licensed to the Apache Software Foundation (ASF) under one
    * or more contributor license agreements.  See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership.  The ASF licenses this file
    * to you under the Apache License, Version 2.0 (the
    * "License"); you may not use this file except in compliance
    * with the License.  You may obtain a copy of the License at
    *
   *   http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing,
   * software distributed under the License is distributed on an
   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
   * KIND, either express or implied.  See the License for the
   * specific language governing permissions and limitations
   * under the License.
   */
  package org.apache.maven.cling.extensions;
  
  import java.util.function.Function;
  
  import com.google.inject.Binder;
  import com.google.inject.Module;
  import com.google.inject.name.Names;
  import org.apache.maven.api.services.Interpolator;
  import org.apache.maven.api.xml.XmlNode;
  import org.apache.maven.extension.internal.CoreExtensionEntry;
  import org.apache.maven.internal.impl.model.DefaultInterpolator;
  import org.apache.maven.internal.xml.XmlNodeImpl;
  import org.apache.maven.internal.xml.XmlPlexusConfiguration;
  import org.apache.maven.model.v4.MavenTransformer;
  import org.codehaus.plexus.configuration.PlexusConfiguration;
  
  public class ExtensionConfigurationModule implements Module {
  
      private final CoreExtensionEntry extension;
      private final Function<String, String> callback;
      private final DefaultInterpolator interpolator = new DefaultInterpolator();
  
      public ExtensionConfigurationModule(CoreExtensionEntry extension, Function<String, String> callback) {
          this.extension = extension;
          this.callback = callback;
      }
  
      @Override
      public void configure(Binder binder) {
          if (extension.getKey() != null) {
              XmlNode configuration = extension.getConfiguration();
              if (configuration == null) {
                  configuration = new XmlNodeImpl("configuration");
              }
              Function<String, String> cb = Interpolator.memoize(callback);
              Function<String, String> it = s -> interpolator.interpolate(s, cb);
              configuration = new ExtensionInterpolator(it).transform(configuration);
  
              binder.bind(XmlNode.class)
                      .annotatedWith(Names.named(extension.getKey()))
                      .toInstance(configuration);
              binder.bind(PlexusConfiguration.class)
                      .annotatedWith(Names.named(extension.getKey()))
                      .toInstance(XmlPlexusConfiguration.toPlexusConfiguration(configuration));
          }
      }
  
      static class ExtensionInterpolator extends MavenTransformer {
          ExtensionInterpolator(Function<String, String> transformer) {
              super(transformer);
          }
  
          public XmlNode transform(XmlNode node) {
              return super.transform(node);
          }
      }
  }