/*
    * 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
    *
   *   https://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.apache.commons.io.IOUtils;
  import org.junit.jupiter.api.Test;
  
  class ZipSplitOutputStreamTest extends AbstractTest {
  
      @Test
      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);
                  InputStream inputStream = Files.newInputStream(fileToTest.toPath())) {
              IOUtils.copy(inputStream, zipSplitOutputStream);
          }
          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
      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
      void testThrowsExceptionIfSplitSizeIsTooLarge() {
          assertThrows(IllegalArgumentException.class, () -> new ZipSplitOutputStream(createTempFile("temp", "zip"), 4 * 1024 * 1024 * 1024L));
      }
  
      @Test
      void testThrowsExceptionIfSplitSizeIsTooSmall() {
          assertThrows(IllegalArgumentException.class, () -> new ZipSplitOutputStream(createTempFile("temp", "zip"), 64 * 1024 - 1));
      }
  
      @Test
      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));
      }
  }