//------------------------------------------------------------------
// biorhythm - BioRhythm.
// Copyright 1997, All rights reserved
// Version: 1.1
// Authors: Tsuyoshi Furumizo
// Created: 1/28/97
// Modified: 5/19/98
//-------------------------------------------------------------------

import java.applet.Applet;
import java.awt.*;
import java.util.Date;
import java.lang.Math;

public class biorhythm extends Applet

{
    InputControls controls;

    public void init() {
	setLayout(new BorderLayout());
	BioCanvas c = new BioCanvas();
	add("Center", c);
	add("South", controls = new InputControls(c));
    }

    public void start() {
	controls.enable();
    }

    public void stop() {
	controls.disable();
    }

    public boolean handleEvent(Event e) {
	if (e.id == Event.WINDOW_DESTROY) {
	    System.exit(0);
	}
	return false;
    }

    public static void main(String args[]) {
	Frame f = new Frame("biorhythm");
	biorhythm bioRhythm = new biorhythm();

	bioRhythm.init();
	bioRhythm.start();

	f.add("Center", bioRhythm);
	f.resize(300, 300);
	f.show();
    }
} // end class biorhythm

class BioCanvas extends Canvas {
    int year = 0, mon = 0, day = 0;

    public void paint(Graphics g) {
	Rectangle r = bounds();
	int h = r.height;
	int w = r.width;
        int i, dday;
        Date date = new Date();

        g.setColor(Color.black);
	g.drawLine(0, h/2, w, h/2);
	g.drawLine(10, 0, 10, h);
        g.setFont(new Font("TimesRoman", Font.PLAIN, 10));
        for(i = 1; i <= (w - 10) / 20; i++) {
            Date dt = new Date(date.getYear(), date.getMonth(),
            		       date.getDate() + i - 1);
            g.drawLine(10 + i * 20, h / 2 - 5,
            	       10 + i * 20, h / 2 + 5);
            g.drawString(Integer.toString(dt.getMonth() + 1),
                         10 + i * 20 - 4,
                         h / 2 + 20);
            g.drawString("/",
                         10 + i * 20 - 4,
                         h / 2 + 30);
            g.drawString(Integer.toString(dt.getDate()),
                         10 + i * 20 - 4,
                         h / 2 + 40);
        }

        if(mon == 0 || day == 0) {
            return;
        }
        dday = dDay(date.getYear() + 1900, date.getMonth() + 1, date.getDate())
        	- dDay(year, mon, day);

        int x[] = new int[(w - 10) / 2];
        int y[] = new int[(w - 10) / 2];

        // 身体
        g.setColor(Color.black);
        for(i = 0; i < (w - 10) / 2; i++) {
            x[i] = i * 2 + 10;
            y[i] = (int)(Math.sin(2 * Math.PI * ((float)(i-10 + dday * 10)
           		 / 10.0) / -23.0) * h / 3.0 + h / 2.0);
            if(y[i] >= h / 2 - 1 && y[i] <= h / 2 + 1) {
                g.drawOval(x[i] - 4, y[i] - 4, 8, 8);
            }
        }
        g.setColor(Color.blue);
//        g.drawPolygon(x, y, (w - 10) / 2);
        for(i = 0; i < (w - 10) / 2 - 1; i++)
	    g.drawLine(x[i], y[i], x[i+1], y[i+1]);


        // 知性
        g.setColor(Color.black);
        for(i = 0; i < (w - 10) / 2; i++) {
            x[i] = i * 2 + 10;
            y[i] = (int)(Math.sin(2 * Math.PI * ((float)(i-10 + dday * 10)
           		 / 10.0) / -33.0) * h / 3.0 + h / 2.0);
            if(y[i] >= h / 2 - 1 && y[i] <= h / 2 + 1) {
                g.drawOval(x[i] - 4, y[i] - 4, 8, 8);
            }
        }
        g.setColor(Color.red);
//        g.drawPolygon(x, y, (w - 10) / 2);
        for(i = 0; i < (w - 10) / 2 - 1; i++)
	    g.drawLine(x[i], y[i], x[i+1], y[i+1]);

        // 感情
        g.setColor(Color.black);
        for(i = 0; i < (w - 10) / 2; i++) {
            x[i] = i * 2 + 10;
            y[i] = (int)(Math.sin(2 * Math.PI * ((float)(i-10 + dday * 10)
           		 / 10.0) / -28.0) * h / 3.0 + h / 2.0);
            if(y[i] >= h / 2 - 1 && y[i] <= h / 2 + 1) {
                g.drawOval(x[i] - 4, y[i] - 4, 8, 8);
            }
        }
        g.setColor(new Color(0,0x80,0));
//        g.drawPolygon(x, y, (w - 10) / 2);
        for(i = 0; i < (w - 10) / 2 - 1; i++)
	    g.drawLine(x[i], y[i], x[i+1], y[i+1]);
    }
    public void redraw(int y, int m, int d) {
    	this.year = y;
        this.mon = m;
        this.day = d;
	repaint();
    }
    int dDay(int y, int m, int d) {
        int i, md[] = new int[12];
        int dday;

        md[0] = 31; md[1] = 28; md[2] = 31; md[3] = 30; md[4] = 31;
        md[5] = 30; md[6] = 31; md[7] = 31; md[8] = 30; md[9] = 31;
        md[10] = 30; md[11] = 31;
        dday = (y - 1) * 365;
        dday = dday + ((y - 1) / 4) - ((y - 1) / 100) + ((y - 1) / 400);
        for(i = 0; i < m - 1; i++) {
            dday += md[i];
            if((i == 1) && (y % 4 == 0) && ((y % 100 != 0) || (y % 400 == 0)))
                dday++;
        }
        dday += d;
        return dday;
    }

} // end class BioCanvas

class InputControls extends Panel
{
    TextField sy, sm, sd;
    BioCanvas canvas;

    public InputControls(BioCanvas canvas) {
	this.canvas = canvas;
	add(new Label("Year"));
	add(sy = new TextField("", 4));
	add(new Label("Month"));
	add(sm = new TextField("", 2));
	add(new Label("Day"));
	add(sd = new TextField("", 2));
	add(new Label(" "));
	add(new Button("Start"));
    }
    public boolean action(Event ev, Object arg) {
	if (ev.target instanceof Button) {
	    canvas.redraw(Integer.parseInt(sy.getText().trim()),
                          Integer.parseInt(sm.getText().trim()),
                          Integer.parseInt(sd.getText().trim()));

	    return true;
	}
	return false;
    }
} // end class InputControls