/*
    * 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;
  
  import javax.inject.Inject;
  import javax.inject.Named;
  import javax.inject.Singleton;
  
  import java.io.IOException;
  import java.io.InputStream;
  import java.util.List;
  
  import org.apache.maven.api.annotations.Nonnull;
  import org.apache.maven.api.services.BuilderProblem;
  import org.apache.maven.api.services.Source;
  import org.apache.maven.api.services.ToolchainsBuilder;
  import org.apache.maven.api.services.ToolchainsBuilderException;
  import org.apache.maven.api.services.ToolchainsBuilderRequest;
  import org.apache.maven.api.services.ToolchainsBuilderResult;
  import org.apache.maven.api.toolchain.PersistedToolchains;
  import org.apache.maven.toolchain.building.DefaultToolchainsBuildingRequest;
  import org.apache.maven.toolchain.building.ToolchainsBuildingException;
  import org.apache.maven.toolchain.building.ToolchainsBuildingResult;
  
  @Named
  @Singleton
  public class DefaultToolchainsBuilder implements ToolchainsBuilder {
  
      private final org.apache.maven.toolchain.building.ToolchainsBuilder builder;
  
      @Inject
      public DefaultToolchainsBuilder(org.apache.maven.toolchain.building.ToolchainsBuilder builder) {
          this.builder = builder;
      }
  
      @Nonnull
      @Override
      public ToolchainsBuilderResult build(ToolchainsBuilderRequest request)
              throws ToolchainsBuilderException, IllegalArgumentException {
          try {
              DefaultToolchainsBuildingRequest req = new DefaultToolchainsBuildingRequest();
              if (request.getGlobalToolchainsSource().isPresent()) {
                  req.setGlobalToolchainsSource(new MappedToolchainsSource(
                          request.getGlobalToolchainsSource().get()));
              } else if (request.getGlobalToolchainsPath().isPresent()) {
                  req.setGlobalToolchainsSource(new org.apache.maven.building.FileSource(
                          request.getGlobalToolchainsPath().get().toFile()));
              }
              if (request.getUserToolchainsSource().isPresent()) {
                  req.setUserToolchainsSource(new MappedToolchainsSource(
                          request.getUserToolchainsSource().get()));
              } else if (request.getUserToolchainsPath().isPresent()) {
                  req.setUserToolchainsSource(new org.apache.maven.building.FileSource(
                          request.getUserToolchainsPath().get().toFile()));
              }
              ToolchainsBuildingResult result = builder.build(req);
              return new ToolchainsBuilderResult() {
                  @Override
                  public PersistedToolchains getEffectiveToolchains() {
                      return result.getEffectiveToolchains().getDelegate();
                  }
  
                  @Override
                  public List<BuilderProblem> getProblems() {
                      return new MappedList<>(result.getProblems(), MappedBuilderProblem::new);
                  }
              };
          } catch (ToolchainsBuildingException e) {
              throw new ToolchainsBuilderException("Unable to build Toolchains", e);
          }
      }
  
      private static class MappedToolchainsSource implements org.apache.maven.building.Source {
          private final Source source;
  
          MappedToolchainsSource(Source source) {
              this.source = source;
          }
  
          @Override
          public InputStream getInputStream() throws IOException {
              return source.openStream();
          }
 
         @Override
         public String getLocation() {
             return source.getLocation();
         }
     }
 
     private static class MappedBuilderProblem implements BuilderProblem {
         private final org.apache.maven.building.Problem problem;
 
         MappedBuilderProblem(org.apache.maven.building.Problem problem) {
             this.problem = problem;
         }
 
         @Override
         public String getSource() {
             return problem.getSource();
         }
 
         @Override
         public int getLineNumber() {
             return problem.getLineNumber();
         }
 
         @Override
         public int getColumnNumber() {
             return problem.getColumnNumber();
         }
 
         @Override
         public String getLocation() {
             return problem.getLocation();
         }
 
         @Override
         public Exception getException() {
             return problem.getException();
         }
 
         @Override
         public String getMessage() {
             return problem.getMessage();
         }
 
         @Override
         public Severity getSeverity() {
             return Severity.valueOf(problem.getSeverity().name());
         }
     }
 }