/*
    * 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.api.services;
  
  import java.nio.file.Path;
  import java.util.Optional;
  
  import org.apache.maven.api.Session;
  import org.apache.maven.api.annotations.Experimental;
  import org.apache.maven.api.annotations.Immutable;
  import org.apache.maven.api.annotations.Nonnull;
  import org.apache.maven.api.annotations.NotThreadSafe;
  import org.apache.maven.api.annotations.Nullable;
  
  import static org.apache.maven.api.services.BaseRequest.nonNull;
  
  /**
   * Collects settings that control the building of effective settings.
   */
  @Experimental
  @Immutable
  public interface SettingsBuilderRequest {
  
      @Nonnull
      Session getSession();
  
      /**
       * Gets the global settings path.
       *
       * @return the global settings path or {@code null} if none
       */
      @Nonnull
      Optional<Path> getGlobalSettingsPath();
  
      /**
       * Gets the global settings source.
       *
       * @return the global settings source or {@code null} if none
       */
      @Nonnull
      Optional<Source> getGlobalSettingsSource();
  
      /**
       * Gets the user settings path.
       *
       * @return the user settings path or {@code null} if none
       */
      @Nonnull
      Optional<Path> getUserSettingsPath();
  
      /**
       * Gets the user settings source.
       *
       * @return the user settings source or {@code null} if none
       */
      @Nonnull
      Optional<Source> getUserSettingsSource();
  
      @Nonnull
      static SettingsBuilderRequest build(
              @Nonnull Session session, @Nonnull Source globalSettingsSource, @Nonnull Source userSettingsSource) {
          return builder()
                  .session(nonNull(session, "session cannot be null"))
                  .globalSettingsSource(nonNull(globalSettingsSource, "globalSettingsSource cannot be null"))
                  .userSettingsSource(nonNull(userSettingsSource, "userSettingsSource cannot be null"))
                  .build();
      }
  
      @Nonnull
      static SettingsBuilderRequest build(
              @Nonnull Session session, @Nonnull Path globalSettingsPath, @Nonnull Path userSettingsPath) {
          return builder()
                  .session(nonNull(session, "session cannot be null"))
                  .globalSettingsPath(nonNull(globalSettingsPath, "globalSettingsPath cannot be null"))
                  .userSettingsPath(nonNull(userSettingsPath, "userSettingsPath cannot be null"))
                  .build();
      }
  
      @Nonnull
      static SettingsBuilderRequestBuilder builder() {
          return new SettingsBuilderRequestBuilder();
      }
  
     @NotThreadSafe
     class SettingsBuilderRequestBuilder {
         Session session;
         Path globalSettingsPath;
         Source globalSettingsSource;
         Path userSettingsPath;
         Source userSettingsSource;
 
         public SettingsBuilderRequestBuilder session(Session session) {
             this.session = session;
             return this;
         }
 
         public SettingsBuilderRequestBuilder globalSettingsPath(Path globalSettingsPath) {
             this.globalSettingsPath = globalSettingsPath;
             return this;
         }
 
         public SettingsBuilderRequestBuilder globalSettingsSource(Source globalSettingsSource) {
             this.globalSettingsSource = globalSettingsSource;
             return this;
         }
 
         public SettingsBuilderRequestBuilder userSettingsPath(Path userSettingsPath) {
             this.userSettingsPath = userSettingsPath;
             return this;
         }
 
         public SettingsBuilderRequestBuilder userSettingsSource(Source userSettingsSource) {
             this.userSettingsSource = userSettingsSource;
             return this;
         }
 
         public SettingsBuilderRequest build() {
             return new DefaultSettingsBuilderRequest(
                     session, globalSettingsPath, globalSettingsSource, userSettingsPath, userSettingsSource);
         }
 
         private static class DefaultSettingsBuilderRequest extends BaseRequest implements SettingsBuilderRequest {
             private final Path globalSettingsPath;
             private final Source globalSettingsSource;
             private final Path userSettingsPath;
             private final Source userSettingsSource;
 
             @SuppressWarnings("checkstyle:ParameterNumber")
             DefaultSettingsBuilderRequest(
                     @Nonnull Session session,
                     @Nullable Path globalSettingsPath,
                     @Nullable Source globalSettingsSource,
                     @Nullable Path userSettingsPath,
                     @Nullable Source userSettingsSource) {
                 super(session);
                 this.globalSettingsPath = globalSettingsPath;
                 this.globalSettingsSource = globalSettingsSource;
                 this.userSettingsPath = userSettingsPath;
                 this.userSettingsSource = userSettingsSource;
             }
 
             @Nonnull
             @Override
             public Optional<Path> getGlobalSettingsPath() {
                 return Optional.ofNullable(globalSettingsPath);
             }
 
             @Nonnull
             @Override
             public Optional<Source> getGlobalSettingsSource() {
                 return Optional.ofNullable(globalSettingsSource);
             }
 
             @Nonnull
             @Override
             public Optional<Path> getUserSettingsPath() {
                 return Optional.ofNullable(userSettingsPath);
             }
 
             @Nonnull
             @Override
             public Optional<Source> getUserSettingsSource() {
                 return Optional.ofNullable(userSettingsSource);
             }
         }
     }
 }