/*
    * 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.model.path;
  
  import javax.inject.Inject;
  import javax.inject.Named;
  import javax.inject.Singleton;
  
  import java.io.File;
  
  import org.apache.maven.api.model.ActivationFile;
  import org.apache.maven.model.profile.ProfileActivationContext;
  import org.codehaus.plexus.interpolation.AbstractValueSource;
  import org.codehaus.plexus.interpolation.InterpolationException;
  import org.codehaus.plexus.interpolation.MapBasedValueSource;
  import org.codehaus.plexus.interpolation.RegexBasedInterpolator;
  
  /**
   * Finds an absolute path for {@link ActivationFile#getExists()} or {@link ActivationFile#getMissing()}
   *
   * @author Ravil Galeyev
   */
  @Named
  @Singleton
  public class ProfileActivationFilePathInterpolator {
  
      private final PathTranslator pathTranslator;
  
      @Inject
      public ProfileActivationFilePathInterpolator(PathTranslator pathTranslator) {
          this.pathTranslator = pathTranslator;
      }
  
      /**
       * Interpolates given {@code path}.
       *
       * @return absolute path or {@code null} if the input was {@code null}
       */
      public String interpolate(String path, ProfileActivationContext context) throws InterpolationException {
          if (path == null) {
              return null;
          }
  
          RegexBasedInterpolator interpolator = new RegexBasedInterpolator();
  
          final File basedir = context.getProjectDirectory();
  
          if (basedir != null) {
              interpolator.addValueSource(new AbstractValueSource(false) {
                  @Override
                  public Object getValue(String expression) {
                      /*
                       * We intentionally only support ${basedir} and not ${project.basedir} as the latter form
                       * would suggest that other project.* expressions can be used which is beyond the design.
                       */
                      if ("basedir".equals(expression)) {
                          return basedir.getAbsolutePath();
                      }
                      return null;
                  }
              });
          } else if (path.contains("${basedir}")) {
              return null;
          }
  
          interpolator.addValueSource(new MapBasedValueSource(context.getProjectProperties()));
  
          interpolator.addValueSource(new MapBasedValueSource(context.getUserProperties()));
  
          interpolator.addValueSource(new MapBasedValueSource(context.getSystemProperties()));
  
          String absolutePath = interpolator.interpolate(path, "");
  
          return pathTranslator.alignToBaseDirectory(absolutePath, basedir);
      }
  }