package org.argeo.eclipse.ui.fs;
   
   import java.io.IOException;
   import java.nio.file.Files;
   import java.nio.file.Path;
   import java.nio.file.attribute.FileTime;
   import java.text.DateFormat;
   import java.text.SimpleDateFormat;
   import java.util.Date;
  
  import org.argeo.eclipse.ui.EclipseUiUtils;
  import org.eclipse.jface.viewers.ColumnLabelProvider;
  
  /** Expect a {@link Path} as input element */
  public class NioFileLabelProvider extends ColumnLabelProvider {
  	private final static FileTime EPOCH = FileTime.fromMillis(0);
  	private static final long serialVersionUID = 2160026425187796930L;
  	private final String propName;
  	private DateFormat dateFormat = new SimpleDateFormat("YYYY-MM-dd HH:mm");
  
  	// TODO use new formatting
  	// DateTimeFormatter formatter =
  	// DateTimeFormatter.ofLocalizedDateTime( FormatStyle.SHORT )
  	// .withLocale( Locale.UK )
  	// .withZone( ZoneId.systemDefault() );
  	public NioFileLabelProvider(String propName) {
  		this.propName = propName;
  	}
  
  	@Override
  	public String getText(Object element) {
  		try {
  			Path path;
  			if (element instanceof ParentDir) {
  //				switch (propName) {
  //				case FsUiConstants.PROPERTY_SIZE:
  //					return "-";
  //				case FsUiConstants.PROPERTY_LAST_MODIFIED:
  //					return "-";
  //				// return Files.getLastModifiedTime(((ParentDir) element).getPath()).toString();
  //				case FsUiConstants.PROPERTY_TYPE:
  //					return "Folder";
  //				}
  				path = ((ParentDir) element).getPath();
  			} else
  				path = (Path) element;
  			switch (propName) {
  			case FsUiConstants.PROPERTY_SIZE:
  				if (Files.isDirectory(path))
  					return "-";
  				else
  					return FsUiUtils.humanReadableByteCount(Files.size(path), false);
  			case FsUiConstants.PROPERTY_LAST_MODIFIED:
  				if (Files.isDirectory(path))
  					return "-";
  				FileTime time = Files.getLastModifiedTime(path);
  				if (time.equals(EPOCH))
  					return "-";
  				else
  					return dateFormat.format(new Date(time.toMillis()));
  			case FsUiConstants.PROPERTY_TYPE:
  				if (Files.isDirectory(path))
  					return "Folder";
  				else {
  					String mimeType = Files.probeContentType(path);
  					if (EclipseUiUtils.isEmpty(mimeType))
  						return "Unknown";
  					else
  						return mimeType;
  				}
  			default:
  				throw new IllegalArgumentException("Unsupported property " + propName);
  			}
  		} catch (IOException ioe) {
  			throw new FsUiException("Cannot get property " + propName + " on " + element);
  		}
  	}
  }