/*
    * 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.assertFalse;
  import static org.junit.jupiter.api.Assertions.assertThrows;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  import java.awt.image.BufferedImage;
  import java.io.ByteArrayOutputStream;
  import java.io.IOException;
  
  import org.apache.commons.imaging.ImageInfo;
  import org.apache.commons.imaging.common.AllocationRequestException;
  import org.junit.jupiter.api.Test;
  
  public class PngImageParserTest extends AbstractPngTest {
  
      private static byte[] getPngImageBytes(final BufferedImage image, final PngImagingParameters params) throws IOException {
          try (ByteArrayOutputStream os = new ByteArrayOutputStream()) {
              new PngWriter().writeImage(image, os, params, null);
              return os.toByteArray();
          }
      }
  
      @Test
      public void testGetImageSize() {
          final byte[] bytes = {
                  // Header
                  (byte) 0x89, 'P', 'N', 'G', '\r', '\n', 0x1A, '\n',
                  // (Too large) Length
                  (byte) 0b0111_1111, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF - 10,
                  // Chunk type
                  'I', 'H', 'D', 'R', };
          assertThrows(AllocationRequestException.class, () -> new PngImageParser().getImageSize(bytes));
      }
  
      @Test
      public void testNoPalette() throws IOException {
          final BufferedImage image = new BufferedImage(100, 100, BufferedImage.TYPE_INT_RGB);
          image.setRGB(1, 1, 0x00FFffFF);
          final PngImagingParameters params = new PngImagingParameters();
  
          final byte[] bytes = getPngImageBytes(image, params);
          final ImageInfo imageInfo = new PngImageParser().getImageInfo(bytes, null);
          assertFalse(imageInfo.usesPalette());
      }
  
      @Test
      public void testPalette() throws IOException {
          final BufferedImage image = new BufferedImage(100, 100, BufferedImage.TYPE_INT_RGB);
          image.setRGB(1, 1, 0x00FFffFF);
          final PngImagingParameters params = new PngImagingParameters();
          params.setForceIndexedColor(true);
  
          final byte[] bytes = getPngImageBytes(image, params);
          final ImageInfo imageInfo = new PngImageParser().getImageInfo(bytes, null);
          assertTrue(imageInfo.usesPalette());
      }
  }