import java.awt.*;
import java.awt.image.BufferedImage;
import java.awt.event.*;
import java.util.Calendar;
import java.text.*;
import java.util.Random;
import ij.*;
import ij.gui.*;
import ij.process.*;
import ij.plugin.filter.PlugInFilter;
import ij.text.*;

/*
 *  Phase Ratio analyzer performs following tasks
 *	1, get 250 (or a user set number) random points from a picture,
 *	2, each time, display a pop up window with magnified (x4, 16x16 pixels) picture around the selected point and ask if the user think the center of the picture is low or high
 *	3, remember low or high selection from the user
 *	4, give the ratio between low and high after all points
 */

public class Phase_Ratio_Analyzer implements PlugInFilter {
	ImagePlus imp;
	static int num = 250;
	static int cropSize = 16;
	
	String name = "Phase Ratio Analyzer";

	public int setup(String args, ImagePlus imp) {
		if(args.equals("about")) {
			IJ.showMessage(name);
			return DONE;
		}
		if (IJ.versionLessThan("1.41l")) return DONE;
		if(imp != null) this.imp = imp;
		GenericDialog param = new GenericDialog(name, IJ.getInstance());
		param.addNumericField("Number of Points:", num, 0);
		param.addNumericField("Crop size (less than 50):", cropSize, 0 );
		param.showDialog();
		if(!param.wasCanceled()) {
			num = (int)param.getNextNumber();
			cropSize = (int)param.getNextNumber();
			if( cropSize > 50 ){
				IJ.showMessage("Crop size is too big,\nreset to 50pixel.");
				cropSize = 50;
			}
		}
		return DOES_ALL;
	}

	public void run(ImageProcessor ip) {
		RatioAnalyzerWindow raWindow = new RatioAnalyzerWindow( imp, num, cropSize);
        raWindow.makeChoice();
  	}
}

class RatioAnalyzerWindow extends Frame implements ActionListener{
	BufferedImage oi;
	Button buttonA;
	Button buttonB;
	Button buttonStop;
	Panel southContainer;
	String fileName;
	static TextWindow rWindow = new TextWindow("Phase","", 400, 300);
	static TextPanel tp = rWindow.getTextPanel();
	static{
		tp.setColumnHeadings("Name\tBright cliks\tDark clicks\tTotal clicks\tBright Percentage\tDark Percentge");
	}
	
	double A = 0f, B = 0f;
	int n = 0;
	int nsteps = 0;
	int cropSize = 0;
	
	Random gen = new Random( Calendar.getInstance().getTimeInMillis() % 100000l );
	
	public RatioAnalyzerWindow(ImagePlus _ip, int _nsteps, int _cropSize){
		super( "Analyer Window");
		
		oi = _ip.getBufferedImage();
		nsteps = _nsteps;
		cropSize = _cropSize;
		fileName = _ip.getOriginalFileInfo().fileName;

		
		buttonA = new Button( "Bright" );
		buttonB = new Button( "Dark" );
		buttonStop = new Button( "Stop" );
		
		buttonA.addActionListener( this);
		buttonB.addActionListener( this );
		buttonStop.addActionListener( this );
		
		this.setSize( 300, 300 );
		southContainer = new Panel();
		southContainer.setLayout( new FlowLayout() );
		southContainer.add( buttonA );
		southContainer.add( buttonB );
		southContainer.add( buttonStop );
		
		this.setLayout( new BorderLayout() );
		this.add("South", southContainer );
	}
	
	public void paint( Graphics g ){
		int x = gen.nextInt( oi.getWidth() - cropSize - 1 );
		int y = gen.nextInt( oi.getHeight() - cropSize - 1 );
		
		int posA = 150 - ( cropSize << 1 );
		int crop4 = cropSize << 2;
		
		BufferedImage clip = oi.getSubimage( x, y, cropSize, cropSize );
		g.drawImage( clip, posA, posA, crop4, crop4, this );
		g.setColor( Color.red );
		g.drawLine( 10, 150, 148, 150 );
		g.drawLine( 152, 150, 290, 150 );
		g.drawLine( 150, 10, 150, 148 );
		g.drawLine( 150, 152, 150, 250 );
	}
	
	public void makeChoice(){
		ij.gui.GUI.center( this );
		this.setVisible( true );
	}
	
	public void choiceEnd(){
		this.setVisible( false );
		
		tp.appendLine( fileName+"\t"
						+ A + "\t"
						+ B + "\t"
						+ ( A + B )+"\t" 
						+ (100d * A / ( A + B ) ) + "\t" 
						+  ( 100d * B / ( A + B ) ) );
	}
	
	public void actionPerformed(ActionEvent evt) {
		
		if( evt.getSource() == buttonA ){
			A += 1f;
			repaint();
		}else if( evt.getSource() == buttonB ){
			B += 1f;
			repaint();
		}else if( evt.getSource() == buttonStop ){
			this.choiceEnd();
		}
		n ++;
		if( n == nsteps ){
			this.choiceEnd();
		}
	} 
}