/*
    * 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.imaging.formats.png;
  
  import static org.junit.jupiter.api.Assertions.assertNotNull;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  import java.awt.image.BufferedImage;
  import java.io.File;
  import java.nio.file.Files;
  
  import org.apache.commons.imaging.ImageFormats;
  import org.apache.commons.imaging.Imaging;
  import org.apache.commons.imaging.ImagingTestConstants;
  import org.apache.commons.imaging.internal.Debug;
  import org.apache.commons.io.FilenameUtils;
  import org.junit.jupiter.api.Test;
  
  public class PngMultipleRoundtripTest extends AbstractPngTest {
  
      @Test
      public void test() throws Exception {
          final String imagesFolderPath = FilenameUtils.separatorsToSystem(ImagingTestConstants.TEST_DATA_SOURCE_FOLDER + "/images/png/3");
          final File imagesFolder = new File(imagesFolderPath);
          assertTrue(imagesFolder.exists() && imagesFolder.isDirectory());
  
          final File[] files = imagesFolder.listFiles();
          for (final File file : files) {
              final File imageFile = file;
              if (!imageFile.isFile()) {
                  continue;
              }
              if (!imageFile.getName().toLowerCase().endsWith(".png")) {
                  continue;
              }
  
              Debug.debug();
              Debug.debug("imageFile", imageFile);
  
              File lastFile = imageFile;
              for (int j = 0; j < 10; j++) {
                  final BufferedImage image = Imaging.getBufferedImage(lastFile);
                  assertNotNull(image);
  
                  final File tempFile = Files.createTempFile(imageFile.getName() + "." + j + ".", ".png").toFile();
                  Debug.debug("tempFile", tempFile);
  
                  Imaging.writeImage(image, tempFile, ImageFormats.PNG);
  
                  lastFile = tempFile;
              }
          }
      }
  
  }