/*
    * 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.profile.activation;
  
  import javax.inject.Named;
  import javax.inject.Singleton;
  
  import org.apache.maven.model.Activation;
  import org.apache.maven.model.ActivationProperty;
  import org.apache.maven.model.Profile;
  import org.apache.maven.model.building.ModelProblem.Severity;
  import org.apache.maven.model.building.ModelProblem.Version;
  import org.apache.maven.model.building.ModelProblemCollector;
  import org.apache.maven.model.building.ModelProblemCollectorRequest;
  import org.apache.maven.model.profile.ProfileActivationContext;
  import org.codehaus.plexus.util.StringUtils;
  
  /**
   * Determines profile activation based on the existence or value of some execution property.
   *
   * @author Benjamin Bentmann
   * @see ActivationProperty
   */
  @Named("property")
  @Singleton
  public class PropertyProfileActivator implements ProfileActivator {
  
      @Override
      public boolean isActive(Profile profile, ProfileActivationContext context, ModelProblemCollector problems) {
          Activation activation = profile.getActivation();
  
          if (activation == null) {
              return false;
          }
  
          ActivationProperty property = activation.getProperty();
  
          if (property == null) {
              return false;
          }
  
          String name = property.getName();
          boolean reverseName = false;
  
          if (name != null && name.startsWith("!")) {
              reverseName = true;
              name = name.substring(1);
          }
  
          if (name == null || name.length() <= 0) {
              problems.add(new ModelProblemCollectorRequest(Severity.ERROR, Version.BASE)
                      .setMessage("The property name is required to activate the profile " + profile.getId())
                      .setLocation(property.getLocation("")));
              return false;
          }
  
          // Lookup order: user (-D) → system (java.version, os.name, …).
          // In external model builds the caller provides a sandboxed context
          // (see DefaultModelBuilder.externalActivationContext()) that suppresses user properties
          // and merges model properties into system properties, so consumer -D flags cannot
          // activate dependency profiles while POM-declared properties still drive activation.
          String sysValue = context.getUserProperties().get(name);
          if (sysValue == null) {
              sysValue = context.getSystemProperties().get(name);
          }
  
          String propValue = property.getValue();
          if (StringUtils.isNotEmpty(propValue)) {
              boolean reverseValue = false;
              if (propValue.startsWith("!")) {
                  reverseValue = true;
                  propValue = propValue.substring(1);
              }
  
              // we have a value, so it has to match the system value...
              boolean result = propValue.equals(sysValue);
  
              return reverseValue ? !result : result;
          } else {
              boolean result = StringUtils.isNotEmpty(sysValue);
  
              return reverseName ? !result : result;
          }
     }
 
     @Override
     public boolean presentInConfig(Profile profile, ProfileActivationContext context, ModelProblemCollector problems) {
         Activation activation = profile.getActivation();
 
         if (activation == null) {
             return false;
         }
 
         ActivationProperty property = activation.getProperty();
 
         if (property == null) {
             return false;
         }
         return true;
     }
 }