/*
    * 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 java.io.ByteArrayInputStream;
  import java.io.IOException;
  import java.nio.ByteBuffer;
  import java.nio.charset.StandardCharsets;
  import java.util.Arrays;
  import java.util.Collection;
  import java.util.HashMap;
  import java.util.Map;
  
  import org.apache.maven.api.services.ChecksumAlgorithmService;
  import org.eclipse.aether.internal.impl.checksum.*;
  import org.eclipse.aether.spi.connector.checksum.ChecksumAlgorithmFactory;
  import org.junit.jupiter.api.Test;
  
  import static org.junit.jupiter.api.Assertions.*;
  
  public class DefaultChecksumAlgorithmServiceTest {
      private static Map<String, ChecksumAlgorithmFactory> getChecksumAlgorithmFactories() {
          HashMap<String, ChecksumAlgorithmFactory> result = new HashMap<>();
          result.put(Sha512ChecksumAlgorithmFactory.NAME, new Sha512ChecksumAlgorithmFactory());
          result.put(Sha256ChecksumAlgorithmFactory.NAME, new Sha256ChecksumAlgorithmFactory());
          result.put(Sha1ChecksumAlgorithmFactory.NAME, new Sha1ChecksumAlgorithmFactory());
          result.put(Md5ChecksumAlgorithmFactory.NAME, new Md5ChecksumAlgorithmFactory());
          return result;
      }
  
      private final DefaultChecksumAlgorithmService service = new DefaultChecksumAlgorithmService(
              new DefaultChecksumAlgorithmFactorySelector(getChecksumAlgorithmFactories()));
  
      @Test
      void smokeTest() {
          Collection<String> algNames = service.getChecksumAlgorithmNames();
          assertEquals(4, algNames.size());
      }
  
      @Test
      void emptySha1Calculator() {
          ChecksumAlgorithmService.ChecksumCalculator calculator =
                  service.select("SHA-1").getCalculator();
          calculator.update(ByteBuffer.allocate(0));
          assertEquals(calculator.checksum(), "da39a3ee5e6b4b0d3255bfef95601890afd80709");
      }
  
      @Test
      void calculateByte() throws IOException {
          Map<ChecksumAlgorithmService.ChecksumAlgorithm, String> checksums = service.calculate(
                  "test".getBytes(StandardCharsets.UTF_8), service.select(Arrays.asList("SHA-1", "MD5")));
          assertNotNull(checksums);
          assertEquals(2, checksums.size());
          assertEquals("a94a8fe5ccb19ba61c4c0873d391e987982fbbd3", checksums.get(service.select("SHA-1")));
          assertEquals("098f6bcd4621d373cade4e832627b4f6", checksums.get(service.select("MD5")));
      }
  
      @Test
      void calculateByteBuffer() throws IOException {
          Map<ChecksumAlgorithmService.ChecksumAlgorithm, String> checksums = service.calculate(
                  ByteBuffer.wrap("test".getBytes(StandardCharsets.UTF_8)),
                  service.select(Arrays.asList("SHA-1", "MD5")));
          assertNotNull(checksums);
          assertEquals(2, checksums.size());
          assertEquals("a94a8fe5ccb19ba61c4c0873d391e987982fbbd3", checksums.get(service.select("SHA-1")));
          assertEquals("098f6bcd4621d373cade4e832627b4f6", checksums.get(service.select("MD5")));
      }
  
      @Test
      void calculateStream() throws IOException {
          Map<ChecksumAlgorithmService.ChecksumAlgorithm, String> checksums = service.calculate(
                  new ByteArrayInputStream("test".getBytes(StandardCharsets.UTF_8)),
                  service.select(Arrays.asList("SHA-1", "MD5")));
          assertNotNull(checksums);
          assertEquals(2, checksums.size());
          assertEquals("a94a8fe5ccb19ba61c4c0873d391e987982fbbd3", checksums.get(service.select("SHA-1")));
          assertEquals("098f6bcd4621d373cade4e832627b4f6", checksums.get(service.select("MD5")));
      }
  }