/*
    * 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.Files;
  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.Nonnull;
  import org.apache.maven.api.annotations.NotThreadSafe;
  import org.apache.maven.api.annotations.Nullable;
  
  import static org.apache.maven.api.services.BaseRequest.nonNull;
  
  /**
   *
   * @since 4.0.0
   */
  @Experimental
  public interface ToolchainsBuilderRequest {
      @Nonnull
      Session getSession();
  
      /**
       * Gets the installation Toolchains source.
       *
       * @return the installation Toolchains source or {@code null} if none
       */
      @Nonnull
      Optional<Source> getInstallationToolchainsSource();
  
      /**
       * Gets the user Toolchains source.
       *
       * @return the user Toolchains source or {@code null} if none
       */
      @Nonnull
      Optional<Source> getUserToolchainsSource();
  
      @Nonnull
      static ToolchainsBuilderRequest build(
              @Nonnull Session session,
              @Nullable Source installationToolchainsFile,
              @Nullable Source userToolchainsSource) {
          return builder()
                  .session(nonNull(session, "session cannot be null"))
                  .installationToolchainsSource(installationToolchainsFile)
                  .userToolchainsSource(userToolchainsSource)
                  .build();
      }
  
      @Nonnull
      static ToolchainsBuilderRequest build(
              @Nonnull Session session, @Nullable Path installationToolchainsFile, @Nullable Path userToolchainsPath) {
          return builder()
                  .session(nonNull(session, "session cannot be null"))
                  .installationToolchainsSource(
                          installationToolchainsFile != null && Files.exists(installationToolchainsFile)
                                  ? Source.fromPath(installationToolchainsFile)
                                  : null)
                  .userToolchainsSource(
                          userToolchainsPath != null && Files.exists(userToolchainsPath)
                                  ? Source.fromPath(userToolchainsPath)
                                  : null)
                  .build();
      }
  
      @Nonnull
      static ToolchainsBuilderRequestBuilder builder() {
          return new ToolchainsBuilderRequestBuilder();
      }
  
      @NotThreadSafe
      class ToolchainsBuilderRequestBuilder {
          Session session;
          Source installationToolchainsSource;
          Source userToolchainsSource;
  
          public ToolchainsBuilderRequestBuilder session(Session session) {
              this.session = session;
              return this;
         }
 
         public ToolchainsBuilderRequestBuilder installationToolchainsSource(Source installationToolchainsSource) {
             this.installationToolchainsSource = installationToolchainsSource;
             return this;
         }
 
         public ToolchainsBuilderRequestBuilder userToolchainsSource(Source userToolchainsSource) {
             this.userToolchainsSource = userToolchainsSource;
             return this;
         }
 
         public ToolchainsBuilderRequest build() {
             return new ToolchainsBuilderRequestBuilder.DefaultToolchainsBuilderRequest(
                     session, installationToolchainsSource, userToolchainsSource);
         }
 
         private static class DefaultToolchainsBuilderRequest extends BaseRequest implements ToolchainsBuilderRequest {
             private final Source installationToolchainsSource;
             private final Source userToolchainsSource;
 
             @SuppressWarnings("checkstyle:ParameterNumber")
             DefaultToolchainsBuilderRequest(
                     @Nonnull Session session,
                     @Nullable Source installationToolchainsSource,
                     @Nullable Source userToolchainsSource) {
                 super(session);
                 this.installationToolchainsSource = installationToolchainsSource;
                 this.userToolchainsSource = userToolchainsSource;
             }
 
             @Nonnull
             @Override
             public Optional<Source> getInstallationToolchainsSource() {
                 return Optional.ofNullable(installationToolchainsSource);
             }
 
             @Nonnull
             @Override
             public Optional<Source> getUserToolchainsSource() {
                 return Optional.ofNullable(userToolchainsSource);
             }
         }
     }
 }