import ij.plugin.*;
import java.awt.*;
import java.io.*;
import ij.*;
import ij.io.*;
import ij.process.*;
import ij.gui.*;
import javax.swing.*;

public class Batch_Reducer implements PlugIn {

	private static String[] choices = {"Tiff","Jpeg", "Zip", "Raw"};
	private static String format = "Tiff";
        private File f;

	public void run(String arg) {
		OpenDialog od = new OpenDialog("Select a file in source folder...", "");
		if (od.getFileName()==null) return;
		String dir1 = od.getDirectory();

		GenericDialog gd = new GenericDialog("Batch Converter", IJ.getInstance());
		gd.addChoice("Convert to: ", choices, format);
		gd.showDialog();
		if (gd.wasCanceled())
			return;
		format = gd.getNextChoice();

		SaveDialog sd = new SaveDialog("Open destination folder...", "dummy name (required)", "");
		if (sd.getFileName()==null) return;
		String dir2 = sd.getDirectory();

		convert(dir1, dir2, format);
	}

	public void convert(String dir1, String dir2, String format) {
		IJ.write("");
		IJ.write("Converting to "+format);
		IJ.write("dir1: "+dir1);
		IJ.write("dir2: "+dir2);
		String[] list = new File(dir1).list();
		if (list==null) return;
		for (int i=0; i<list.length; i++) {
			IJ.write((i+1)+": "+list[i]);
			IJ.showStatus(i+"/"+list.length);
			f = new File(dir1+list[i]);
			if (!f.isDirectory()) {
				ImagePlus img = new Opener().openImage(dir1, list[i]);
				if (img!=null) {
					img = process(img);
					if (img!=null)
						save(img, dir2, format);
				}
			}
		}
		IJ.showProgress(1.0);
		IJ.showStatus("");
	}

	/** This is the place to add code to process each image. The image
		is not written if this method returns null. */
	public ImagePlus process(ImagePlus img) {

                IJ.write("processing image " + f.getName());
		double xscale = 1024.0/(double)img.getWidth();
		double yscale = xscale;
		int width = img.getWidth();
		int height = img.getHeight();
		ImageProcessor ip = img.getProcessor();
		ip.setInterpolate(true);
		ip = ip.resize((int)(width*xscale), (int)(height*yscale));
		img.setProcessor(null, ip);

		return img;
	}

	public void save(ImagePlus img, String dir, String format) {
		String name = img.getTitle();
		int type = img.getType();
		int dotIndex = name.lastIndexOf(".");
		if (dotIndex>=0)
			name = name.substring(0, dotIndex);
		String path = dir + name;
		if (format.equals("Tiff"))
			new FileSaver(img).saveAsTiff(path+".tif");
		else if (format.equals("Zip"))
			new FileSaver(img).saveAsZip(path+".zip");
		else if (format.equals("Raw"))
			new FileSaver(img).saveAsRaw(path+".raw");
		else if (format.equals("Jpeg")) {
			if (type==ImagePlus.GRAY16 || type==ImagePlus.GRAY32)
				new ImageConverter(img).convertToGray8();
			new FileSaver(img).saveAsJpeg(path+".jpg");
		}
	}

	/**	Run Batch_Converter using a command something like
			"java -cp ij.jar;. Batch_Converter c:\dir1\ c:\dir2\"
	*/
	public static void main(String args[]) {
		if (args.length<2)
			IJ.write("usage: java Batch_Converter srcdir dstdir");
		else
			new Batch_Reducer().convert(args[0], args[1], "Jpeg");
	}

}