package osm.jp.gpx;

import static org.hamcrest.CoreMatchers.*;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertThat;
import static org.junit.Assert.fail;

import java.io.File;
import java.util.List;

import org.apache.commons.imaging.Imaging;
import org.apache.commons.imaging.common.ImageMetadata;
import org.apache.commons.imaging.common.ImageMetadata.ImageMetadataItem;
import org.apache.commons.imaging.common.RationalNumber;
import org.apache.commons.imaging.formats.jpeg.JpegImageMetadata;
import org.apache.commons.imaging.formats.tiff.TiffImageMetadata;
import org.apache.commons.imaging.formats.tiff.TiffImageMetadata.GPSInfo;
import org.apache.commons.imaging.formats.tiff.constants.ExifTagConstants;
import org.apache.commons.imaging.formats.tiff.constants.GpsTagConstants;
import org.apache.commons.imaging.formats.tiff.taginfos.TagInfoRational;
import org.apache.commons.imaging.formats.tiff.write.TiffOutputDirectory;
import org.apache.commons.imaging.formats.tiff.write.TiffOutputField;
import org.apache.commons.imaging.formats.tiff.write.TiffOutputSet;

public class Expecter {
    String value;
    boolean expect;
    String timeStr;
    double latD;
    double lonD;
    boolean magvar;

    public Expecter(String value, boolean expect, String timeStr, double latD, double lonD, boolean magvar) {
        this.value = value;
        this.expect = expect;
        this.timeStr = timeStr;
        this.latD = latD;
        this.lonD = lonD;
        this.magvar = magvar;
    }

    public static String comparePosition(double b) {
        return String.format("%.4f", b);
    }

    public static void check(Fixture dataset) {
    	Expecter[] es = dataset.expecters;
        AppParameters params;
		try {
			params = new AppParameters(dataset.iniFilePath);
	        File outDir = new File(params.getProperty(AppParameters.IMG_OUTPUT_FOLDER));
	        for (Expecter e : es) {
	            File file = new File(outDir, e.value);
	            System.out.println("[JUnit.debug] assert file='"+ file.getAbsolutePath() +"'");
	            assertThat(file.exists(), is(e.expect));
	            if (e.timeStr != null) {
	            	
	                // JPEG メタデータが存在すること
	                ImageMetadata meta = Imaging.getMetadata(file);

	                // メタデータは インスタンスJpegImageMetadata であること
	                assertThat((meta instanceof JpegImageMetadata), is(true));
	                JpegImageMetadata jpegMetadata = (JpegImageMetadata)meta;
	                assertNotNull(jpegMetadata);
	                
	                // EXIFデータが存在すること
	                TiffImageMetadata exif = jpegMetadata.getExif();
	                assertNotNull(exif);
	                
	                // EXIF-TIME が正しく設定されていること
	                String exifTime = ImportPicture.toEXIFString(ImportPicture.toEXIFDate(exif.getFieldValue(ExifTagConstants.EXIF_TAG_DATE_TIME_ORIGINAL)[0]));
	                System.out.println("[debug] exifTime = '"+ exifTime +"' <--> '" + e.timeStr + "'");
	                assertThat(exifTime, is(e.timeStr));
	                
	                // LAT,LON
	                GPSInfo gpsInfo = exif.getGPS();
	                if (e.latD != 90.0D) {
	                    assertThat(Expecter.comparePosition(gpsInfo.getLatitudeAsDegreesNorth()), is(Expecter.comparePosition(e.latD)));
	                }
	                if (e.lonD != 180.0D) {
	                    assertThat(Expecter.comparePosition(gpsInfo.getLongitudeAsDegreesEast()), is(Expecter.comparePosition(e.lonD)));
	                }
	                
	                // ELE
	                //RationalNumber[] ele = (RationalNumber[]) exif.getFieldValue(GpsTagConstants.GPS_TAG_GPS_ALTITUDE);
	                
	                // MAGVAR
	                if (e.magvar) {
	                	boolean ismagvar = false;
	                	List<? extends ImageMetadataItem> dirs = exif.getDirectories();
	                	for (ImageMetadataItem dir : dirs) {
	                		if (dir instanceof TiffImageMetadata.Directory) {
	                			List<? extends ImageMetadataItem> items = ((TiffImageMetadata.Directory)dir).getItems();
	                			for (ImageMetadataItem item : items) {
		                			if (item instanceof TiffImageMetadata.TiffMetadataItem) {
		                				String str = item.toString();
		                				assertNotNull(str);
		                				TiffImageMetadata.TiffMetadataItem tiffitem = (TiffImageMetadata.TiffMetadataItem)item;
		                				String name = GpsTagConstants.GPS_TAG_GPS_IMG_DIRECTION.name;
		                				if (tiffitem.getKeyword() == name) {
		                					str = tiffitem.getText();
			                				assertNotNull(str);
			                				ismagvar = true;	// MAGVARが設定されている
		                				}
		                			}
	                			}
	                		}
	                	}
	                	if (!ismagvar) {
	                		fail("MAGVARが設定されていない");
	                	}
	                }
	                
	                // SPEED
	                
	            }
	        }
		} catch (Exception e1) {
			fail("予期しない例外: "+ e1.toString());
		}
    }
}