/*
    * 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.tiff;
  
  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.io.IOException;
  
  import org.apache.commons.imaging.Imaging;
  import org.apache.commons.imaging.ImagingTestConstants;
  import org.junit.jupiter.api.Test;
  
  /**
   * Reads files in the BigTIFF samples folder and compares the BigTIFF files against the standard "classic" tiff image.
   */
  public class TiffBigTiffTest extends TiffBaseTest {
  
      private boolean doImagesMatch(final int w, final int h, final int[] classicRgb, final BufferedImage image) {
          final int iW = image.getWidth();
          final int iH = image.getHeight();
          if (iW != w || iH != h) {
              return false;
          }
          final int[] argb = new int[w * h];
          image.getRGB(0, 0, w, h, argb, 0, w);
          for (int i = 0; i < argb.length; i++) {
              if ((argb[i] & 0x00ffffff) != (classicRgb[i] & 0x00ffffff)) {
                  return false;
              }
          }
          return true;
      }
  
      @Test
      public void test() throws IOException {
          final File tiffFolder = new File(ImagingTestConstants.TEST_IMAGE_FOLDER, "tiff");
          final File bigTiffFolder = new File(tiffFolder, "13");
  
          final File classicFile = new File(bigTiffFolder, "Classic.tif");
          final BufferedImage classicImage = Imaging.getBufferedImage(classicFile);
          assertNotNull(classicImage);
          final int w = classicImage.getWidth();
          final int h = classicImage.getHeight();
          final int[] classicRgb = new int[w * h];
          classicImage.getRGB(0, 0, w, h, classicRgb, 0, w); // data for comparison
  
          int nTest = 0;
          final File[] files = bigTiffFolder.listFiles();
          for (final File f : files) {
              final String name = f.getName();
              if (!name.toLowerCase().startsWith("bigtiff")) {
                  continue;
              }
              final BufferedImage image = Imaging.getBufferedImage(f);
              assertNotNull(image);
              final boolean status = doImagesMatch(w, h, classicRgb, image);
              assertTrue(status, "BigTIFF content does not match test image for " + name);
              nTest++;
          }
  
          assertTrue(nTest > 0, "JUnit test failed to find sample BigTIFF files");
      }
  
  }