/*
 * Copyright 1998-2014 University Corporation for Atmospheric Research/Unidata
 *
 *   Portions of this software were developed by the Unidata Program at the
 *   University Corporation for Atmospheric Research.
 *
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 *   any fee or cost, to use, copy, modify, alter, enhance and distribute
 *   this software, and any derivative works thereof, and its supporting
 *   documentation for any purpose whatsoever, provided that this entire
 *   notice appears in all copies of the software, derivative works and
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 */

package ucar.nc2.geotiff;

import org.junit.Test;
import org.junit.experimental.categories.Category;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import ucar.unidata.util.test.category.NeedsCdmUnitTest;
import ucar.unidata.util.test.TestDir;

import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.List;

/**
 * reading geotiff
 *
 * @author caron
 * @since 7/22/2014
 */
@RunWith(Parameterized.class)
public class TestGeotiffRead {
  static public File topdir = new File(TestDir.cdmUnitTestDir + "/formats/geotiff/");

  // Even if this class is being excluded due to the NeedsCdmUnitTest annotation, JUnit still calls this method.
  // So, it mustn't throw an exception. Instead, when cdmUnitTest/ isn't available, it'll return an empty list.
  @Parameterized.Parameters(name="{0}")
  public static List<Object[]> getTestParameters() {
    List<Object[]> result = new ArrayList<>();

    result.addAll(TestDir.getAllFilesInDirectory(topdir, null));

    return result;
  }

  // If cdmUnitTest/ is available, we should not be getting an empty list of files.
  @Category(NeedsCdmUnitTest.class)
  public static class GetAllFilesTest {
    @Test
    public void notEmpty() {
      assert !getTestParameters().isEmpty() : "No test datasets found in " + topdir;
    }
  }

  String filename;

  public TestGeotiffRead(String filename) {
    this.filename = filename;
  }

  // Will not run when we have an empty list of parameters, and thus cannot be used to indicate failure to find the
  // expected datasets. That's why we need GetAllFilesTest.
  @Test
  public void testRead() throws IOException {
    try (GeoTiff geotiff = new GeoTiff(filename)) {
      geotiff.read();
      geotiff.showInfo(new PrintWriter(System.out));

      IFDEntry tileOffsetTag = geotiff.findTag(Tag.TileOffsets);
      if (tileOffsetTag != null) {
        int tileOffset = tileOffsetTag.value[0];
        IFDEntry tileSizeTag = geotiff.findTag(Tag.TileByteCounts);
        int tileSize = tileSizeTag.value[0];
        System.out.println("tileOffset =" + tileOffset + " tileSize=" + tileSize);
        ByteBuffer buffer = geotiff.testReadData(tileOffset, tileSize);

       // for (int i = 0; i < tileSize / 4; i++) {
       //   System.out.println(i + ": " + buffer.getFloat());
       // }

      } else {
        IFDEntry stripOffsetTag = geotiff.findTag(Tag.StripOffsets);
        if (stripOffsetTag != null) {
          int stripOffset = stripOffsetTag.value[0];
          IFDEntry stripSizeTag = geotiff.findTag(Tag.StripByteCounts);
          if (stripSizeTag == null) throw new IllegalStateException();
          int stripSize = stripSizeTag.value[0];
          System.out.println("stripOffset =" + stripOffset + " stripSize=" + stripSize);
          ByteBuffer buffer = geotiff.testReadData(stripOffset, stripSize);

          //for (int i = 0; i < stripSize / 4; i++) {
          //  System.out.println(i + ": " + buffer.getFloat());
          //}
        }
      }
    }
  }

}