/*
    * 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.scm.provider.git.jgit.command.checkout;
  
  import java.io.File;
  import java.io.IOException;
  import java.io.InputStream;
  import java.net.InetSocketAddress;
  import java.nio.charset.StandardCharsets;
  import java.nio.file.Files;
  import java.nio.file.Path;
  import java.nio.file.StandardCopyOption;
  import java.security.GeneralSecurityException;
  import java.security.PublicKey;
  import java.util.function.Consumer;
  
  import org.apache.commons.io.IOUtils;
  import org.apache.maven.scm.provider.ScmProviderRepositoryWithHost;
  import org.apache.maven.scm.provider.git.command.checkout.GitSshCheckOutCommandTckTest;
  import org.apache.maven.scm.provider.git.jgit.JGitTestScmProvider;
  import org.apache.maven.scm.provider.git.jgit.command.ScmProviderAwareSshdSessionFactory;
  import org.apache.maven.scm.provider.git.repository.GitScmProviderRepository;
  import org.apache.maven.scm.repository.ScmRepository;
  import org.apache.sshd.common.config.keys.PublicKeyEntry;
  import org.eclipse.jgit.annotations.NonNull;
  import org.eclipse.jgit.internal.transport.sshd.OpenSshServerKeyDatabase;
  import org.eclipse.jgit.transport.CredentialsProvider;
  import org.eclipse.jgit.transport.sshd.ServerKeyDatabase;
  import org.eclipse.jgit.util.FileUtils;
  import org.junit.Test;
  import org.slf4j.Logger;
  
  /** @author <a href="mailto:struberg@yahoo.de">Mark Struberg</a> */
  public class JGitSshCheckOutCommandTckTest extends GitSshCheckOutCommandTckTest {
  
      public JGitSshCheckOutCommandTckTest() throws GeneralSecurityException, IOException {
          super();
      }
  
      @Override
      protected String getScmProvider() {
          return "jgit";
      }
  
      @Override
      public void initRepo() throws Exception {
          super.initRepo();
          JGitTestScmProvider provider =
                  (JGitTestScmProvider) getScmManager().getProviderByRepository(getScmRepository());
          // accept all hosts
          provider.registerCheckOutCommandCallback(new Consumer<JGitCheckOutCommand>() {
              @Override
              public void accept(JGitCheckOutCommand command) {
                  command.setSshSessionFactorySupplier(AcceptAllHostsSshdSessionFactory::new);
              }
          });
      }
  
      private static final class AcceptAllHostsSshdSessionFactory extends ScmProviderAwareSshdSessionFactory {
          public AcceptAllHostsSshdSessionFactory(GitScmProviderRepository repo, Logger logger) {
              super(repo, logger);
          }
  
          @Override
          protected ServerKeyDatabase createServerKeyDatabase(File homeDir, File sshDir) {
              return new OpenSshServerKeyDatabase(false, null) {
                  @Override
                  public boolean accept(
                          @NonNull String connectAddress,
                          @NonNull InetSocketAddress remoteAddress,
                          @NonNull PublicKey serverKey,
                          @NonNull Configuration config,
                          CredentialsProvider provider) {
                      return true;
                  }
              };
          }
      }
  
      @Override
      protected void deleteDirectory(File directory) throws IOException {
          if (directory.exists()) {
              FileUtils.delete(directory, FileUtils.RECURSIVE | FileUtils.RETRY);
         }
     }
 
     @Test
     public void testCheckOutCommandWithPregeneratedKeysTest() throws Exception {
         // test key pairs being generated with ssh-keygen (they have a slighly different format than the ones tested
         // in testCheckOutCommandWithPassphraseTest and testCheckOutCommandTest)
         configureKeypairFromClasspathResource(getScmRepository(), "sample_rsa", "mySecret");
         super.testCheckOutCommandTest();
     }
 
     private void configureKeypairFromClasspathResource(ScmRepository repository, String resourceName, String passphrase)
             throws IOException, GeneralSecurityException {
         // accept public key
         try (InputStream publicKeyInputStream =
                 this.getClass().getResourceAsStream("/ssh-keypairs/" + resourceName + ".pub")) {
             PublicKey publicKey = PublicKeyEntry.parsePublicKeyEntry(
                             IOUtils.toString(publicKeyInputStream, StandardCharsets.US_ASCII))
                     .resolvePublicKey(null, null, null);
             acceptedPublicKeys.add(publicKey);
         }
         Path privateKeyFile = Files.createTempFile("privateKey", null);
         // private key into tmp file
         try (InputStream privateKeyInputStream = this.getClass().getResourceAsStream("/ssh-keypairs/" + resourceName)) {
             Files.copy(privateKeyInputStream, privateKeyFile, StandardCopyOption.REPLACE_EXISTING);
         }
         // configure provider repository with private key details
         ScmProviderRepositoryWithHost providerRepository =
                 ScmProviderRepositoryWithHost.class.cast(repository.getProviderRepository());
         providerRepository.setPassphrase(passphrase); // may be null
         providerRepository.setPrivateKey(privateKeyFile.toString());
     }
 }