package salesman_2;

import java.awt.Graphics;
import java.util.Random;

public class Salesman extends Thread {

    //koordinate
    int x, y;
    //pomeraji po x i y osi
    double dx, dy;

    //velicina koraka
    int step;
    
    int epsilon;

    boolean full;

    MarketPanel panel;

    //kapacitet trgovca
    //trgovac je uvek ili prazan ili pun, tj. iskoriscava
    //svoj kapacitet do maksimuma, nikad nije poluprazan
    int capacity;

    public Salesman(MarketPanel panel) {
	this.panel = panel;
	Random r = new Random();
	dx = r.nextDouble() - 0.5;
	dy = r.nextDouble() - 0.5;
	boolean isInside = true;
	while (isInside) {
	    x = r.nextInt(panel.getWidth());
	    y = r.nextInt(panel.getHeight());
	    isInside = false;
	    for (Market m : panel.markets) {
		if (m.contains(x, y))
		    isInside = true;
	    }
	}
	capacity = r.nextInt(50);
	step = 5;
	epsilon=5;
	start();
    }

    void drawSelf(Graphics g) {
	if (full)
	    g.fillOval(x, y, 10, 10);
	else
	    g.drawOval(x, y, 10, 10);
    }

    void move() {

	//imamo nekoliko situacija
	Market m = panel.getMarket(this);
	//1. kada je trgovac naleteo na trziste
	if (m != null) {
	    //izvrsavamo prodaju
	    m.doSale(this);
	    //i nakon toga menjamo pravac kretnja
	    if ((x -m.x)<epsilon || (m.x + m.w-x)<epsilon)
		dx = -dx;
	    if ((y -m.y)<epsilon || (m.y + m.h-y)<epsilon)
		dy = -dy;
	} else {
	    //inace proveravamo da li smo naisli na zid
	    if (x >= panel.getWidth() || x <= 0)
		dx = -dx;
	    if (y >= panel.getHeight() || y <= 0)
		dy = -dy;

	}
	//u svakom slucaju se pomeramo u pravcu x i y ose
	x += (int) (dx * step);
	y += (int) (dy * step);
    }

    @Override
    public void run() {

	while (true) {
	    move();
	    panel.repaint();

	    try {
		Thread.sleep(20);
	    } catch (InterruptedException e) {
		// TODO Auto-generated catch block
		e.printStackTrace();
	    }

	}
    }
}