/*
    *  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.commons.compress.archivers.zip;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertThrows;
  
  import java.io.File;
  import java.io.IOException;
  import java.io.InputStream;
  import java.nio.ByteBuffer;
  import java.nio.file.Files;
  
  import org.apache.commons.compress.AbstractTest;
  import org.junit.jupiter.api.Test;
  
  public class ZipSplitOutputStreamTest extends AbstractTest {
  
      @Test
      public void testCreateSplittedFiles() throws IOException {
          final File testOutputFile = newTempFile("testCreateSplittedFiles.zip");
          final int splitSize = 100 * 1024; /* 100 KB */
          final File fileToTest = getFile("COMPRESS-477/split_zip_created_by_zip/zip_to_compare_created_by_zip.zip");
          try (ZipSplitOutputStream zipSplitOutputStream = new ZipSplitOutputStream(testOutputFile, splitSize)) {
              try (InputStream inputStream = Files.newInputStream(fileToTest.toPath())) {
                  final byte[] buffer = new byte[4096];
                  int readLen;
                  while ((readLen = inputStream.read(buffer)) > 0) {
                      zipSplitOutputStream.write(buffer, 0, readLen);
                  }
              }
          }
  
          File zipFile = new File(getTempDirFile().getPath(), "testCreateSplittedFiles.z01");
          assertEquals(zipFile.length(), splitSize);
  
          zipFile = new File(getTempDirFile().getPath(), "testCreateSplittedFiles.z02");
          assertEquals(zipFile.length(), splitSize);
  
          zipFile = new File(getTempDirFile().getPath(), "testCreateSplittedFiles.z03");
          assertEquals(zipFile.length(), splitSize);
  
          zipFile = new File(getTempDirFile().getPath(), "testCreateSplittedFiles.z04");
          assertEquals(zipFile.length(), splitSize);
  
          zipFile = new File(getTempDirFile().getPath(), "testCreateSplittedFiles.z05");
          assertEquals(zipFile.length(), splitSize);
  
          zipFile = new File(getTempDirFile().getPath(), "testCreateSplittedFiles.zip");
          assertEquals(zipFile.length(), fileToTest.length() + 4 - splitSize * 5);
      }
  
      @Test
      public void testSplitZipBeginsWithZipSplitSignature() throws IOException {
          final File tempFile = createTempFile("temp", "zip");
          try (ZipSplitOutputStream is = new ZipSplitOutputStream(tempFile, 100 * 1024L);
                  InputStream inputStream = Files.newInputStream(tempFile.toPath())) {
              final byte[] buffer = new byte[4];
              inputStream.read(buffer);
              assertEquals(ByteBuffer.wrap(ZipArchiveOutputStream.DD_SIG).getInt(), ByteBuffer.wrap(buffer).getInt());
          }
      }
  
      @Test
      public void testThrowsExceptionIfSplitSizeIsTooLarge() {
          assertThrows(IllegalArgumentException.class, () -> new ZipSplitOutputStream(createTempFile("temp", "zip"), 4 * 1024 * 1024 * 1024L));
      }
  
      @Test
      public void testThrowsExceptionIfSplitSizeIsTooSmall() {
          assertThrows(IllegalArgumentException.class, () -> new ZipSplitOutputStream(createTempFile("temp", "zip"), 64 * 1024 - 1));
      }
  
      @Test
      public void testThrowsIfUnsplittableSizeLargerThanSplitSize() throws IOException {
          final long splitSize = 100 * 1024;
          final ZipSplitOutputStream output = new ZipSplitOutputStream(createTempFile("temp", "zip"), splitSize);
          assertThrows(IllegalArgumentException.class, () -> output.prepareToWriteUnsplittableContent(splitSize + 1));
      }
  }