/*
    * 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.internal.impl.model.profile;
  
  import java.io.File;
  
  import org.apache.maven.api.di.Inject;
  import org.apache.maven.api.di.Named;
  import org.apache.maven.api.di.Singleton;
  import org.apache.maven.api.model.Activation;
  import org.apache.maven.api.model.ActivationFile;
  import org.apache.maven.api.model.Profile;
  import org.apache.maven.api.services.BuilderProblem;
  import org.apache.maven.api.services.InterpolatorException;
  import org.apache.maven.api.services.ModelProblem;
  import org.apache.maven.api.services.ModelProblemCollector;
  import org.apache.maven.api.services.model.ProfileActivationContext;
  import org.apache.maven.api.services.model.ProfileActivator;
  import org.apache.maven.internal.impl.model.ProfileActivationFilePathInterpolator;
  
  /**
   * Determines profile activation based on the existence/absence of some file.
   * File name interpolation support is limited to <code>${project.basedir}</code>
   * system properties and user properties.
   *
   * @see ActivationFile
   * @see org.apache.maven.internal.impl.model.DefaultModelValidator#validateRawModel
   */
  @Named("file")
  @Singleton
  public class FileProfileActivator implements ProfileActivator {
  
      private final ProfileActivationFilePathInterpolator profileActivationFilePathInterpolator;
  
      @Inject
      public FileProfileActivator(ProfileActivationFilePathInterpolator profileActivationFilePathInterpolator) {
          this.profileActivationFilePathInterpolator = profileActivationFilePathInterpolator;
      }
  
      @Override
      public boolean isActive(Profile profile, ProfileActivationContext context, ModelProblemCollector problems) {
          Activation activation = profile.getActivation();
  
          if (activation == null) {
              return false;
          }
  
          ActivationFile file = activation.getFile();
  
          if (file == null) {
              return false;
          }
  
          String path;
          boolean missing;
  
          boolean hasExists = file.getExists() != null && !file.getExists().isEmpty();
          boolean hasMissing = file.getMissing() != null && !file.getMissing().isEmpty();
          if (hasExists) {
              if (hasMissing) {
                  problems.add(
                          BuilderProblem.Severity.WARNING,
                          ModelProblem.Version.BASE,
                          String.format(
                                  "Profile '%s' file activation conflict: Both 'missing' (%s) and 'exists' assertions are defined. "
                                          + "The 'missing' assertion will be ignored. Please remove one assertion to resolve this conflict.",
                                  profile.getId(), file.getMissing()),
                          file.getLocation("missing"));
              }
              path = file.getExists();
              missing = false;
          } else if (hasMissing) {
              path = file.getMissing();
              missing = true;
          } else {
              return false;
          }
  
          try {
              path = profileActivationFilePathInterpolator.interpolate(path, context);
          } catch (InterpolatorException e) {
              problems.add(
                      BuilderProblem.Severity.ERROR,
                     ModelProblem.Version.BASE,
                     "Failed to interpolate file location " + path + " for profile " + profile.getId() + ": "
                             + e.getMessage(),
                     file.getLocation(missing ? "missing" : "exists"),
                     e);
             return false;
         }
 
         if (path == null) {
             return false;
         }
 
         File f = new File(path);
 
         if (!f.isAbsolute()) {
             return false;
         }
 
         boolean fileExists = f.exists();
 
         return missing != fileExists;
     }
 
     @Override
     public boolean presentInConfig(Profile profile, ProfileActivationContext context, ModelProblemCollector problems) {
         Activation activation = profile.getActivation();
 
         if (activation == null) {
             return false;
         }
 
         ActivationFile file = activation.getFile();
 
         return file != null;
     }
 }