package code.kalter.longflight.space;

import code.kalter.longflight.Loader;
import code.kalter.longflight.LongFlight;
import java.io.IOException;
import java.util.Random;
import javax.microedition.lcdui.Graphics;
import javax.microedition.lcdui.Image;

/**
 * Генерация случайных планет
 *
 * @author KalterFive
 */
class Planet {

    private final int screenW;
    private final int screenH;
    private final int COUNT = 5;

    private final Random random;
    private final Image[] planetGraphics; // все планеты
    //=======================
    private long lastTime; // для засекания времени
    private long delay;    // задержка для генерации планеты
    //=======================
    private int positionX;
    private int positionY;
    private int index;

    public Planet(int screenW, int screenH) throws IOException {
        this.screenW = screenW;
        this.screenH = screenH;
        random = new Random();
        positionX = random.nextInt(screenW - 60);
        positionY = -100;
        index = random.nextInt(COUNT);
        planetGraphics = new Image[COUNT];
        Loader iml = Loader.getInstance();
        for (int i = 0; i < COUNT; i++) {
            planetGraphics[i] = iml.getImage("/gfx/space/planet/" + i + ".png");
        }
        delay = random.nextInt(25000) + 10000;
        lastTime = System.currentTimeMillis();
    }

    public void paint(Graphics graph) {
        long delta = System.currentTimeMillis() - lastTime;
        if (delta < delay) {
            return;
        }
        graph.drawImage(planetGraphics[index], positionX, positionY, 0);
    }

    public void upd() {
        long delta = System.currentTimeMillis() - lastTime;
        if (delta < delay) {
            return;
        }
        if (positionY++ > screenH) {
            newPlanet();
        }
    }

    private void newPlanet() {
        for (int i = index; i == index; index = random.nextInt(COUNT));
        delay = random.nextInt(25000) + 10000;
        lastTime = System.currentTimeMillis();
        positionX = random.nextInt(screenW - 60);
        positionY = -planetGraphics[index].getHeight();
    }
}