import org.apache.commons.imaging.ImageReadException;
import org.apache.commons.imaging.Imaging;
import org.apache.commons.imaging.common.ImageMetadata;
import org.apache.commons.imaging.formats.jpeg.JpegImageMetadata;
import org.apache.commons.imaging.formats.tiff.TiffField;
import org.apache.commons.imaging.formats.tiff.TiffImageMetadata;
import org.apache.commons.imaging.formats.tiff.fieldtypes.FieldType;


public Optional<String> safeGetValue(TiffField tiffField) {
        try {
            return Optional.of(tiffField.getStringValue());
        } catch (ImageReadException e) {
            return Optional.empty();
        }
    }

    public Optional<LocalDateTime> tryigToApplyDatePattern(String dateTimeVal, List<String> datePatterns) {
        for(String datePattern : datePatterns) {
            try {
                DateTimeFormatter dateTimeFormatter = DateTimeFormatter.ofPattern(datePattern);
                LocalDateTime localDateTime = LocalDateTime.parse(dateTimeVal, dateTimeFormatter);
                return Optional.of(localDateTime);
            } catch (DateTimeParseException ex) {
                // Nothing to do
            }
        }
        return Optional.empty();
    }

    public Optional<LocalDateTime> fromFile(InputStream inputStream) {
        return fromFile(inputStream, asList("DateTime", "DateTimeOriginal", "DateTimeDigitized"), asList("yyyy:MM:dd HH:mm:ss"));
    }

    public Optional<LocalDateTime> fromFile(InputStream inputStream, List<String> exifTags, List<String> datePatterns) {
        ImageMetadata metadata;
        Optional<String> value = Optional.empty();
        try {
            metadata = Imaging.getMetadata(inputStream, null);
            if (metadata != null) {
                TiffImageMetadata items = ((JpegImageMetadata) metadata).getExif();
                if (items != null) {
                    for (TiffField field : items.getAllFields()) {
                        if (field.getFieldType() == FieldType.ASCII) {
                            String tagName = field.getTagName();
                            for(String tag : exifTags) {
                                if (tag.equals(tagName)) {
                                    value = safeGetValue(field);
                                    if (value.isPresent()) {
                                        return tryigToApplyDatePattern(value.get(), datePatterns);
                                    }
                                }
                            }
                        }
                    }
                } else {
                    logger.warn("No tiff fields detected!");
                }
            } else {
                logger.warn("No TiffImageMetadata detected!");
            }
            //JpegImageMetadata jpegMetadata = (JpegImageMetadata) metadata;
        } catch (ImageReadException e) {
            logger.error("ImageReadException", e);
        } catch (IOException e) {
            logger.error("IOException", e);
        } catch (DateTimeParseException e) {
            logger.warn("DateTimeParseException during parse " + value.get(), e);
        }
        return Optional.empty();
    }