package code.kalter.longflight.game;

import code.kalter.longflight.Loader;
import code.kalter.longflight.game.bullet.Collisionable;
import code.kalter.longflight.game.bullet.Gun;
import java.io.IOException;
import javax.microedition.lcdui.Graphics;
import javax.microedition.lcdui.Image;

/**
 * Пули!
 *
 * @author KalterFive
 */
public class Bullet implements Gun {

    private final int SIZE = 128;
    private final int screenH;

    private final Image[] gfx;

    private final int[] positionX;
    private final int[] positionY;
    private final int[] type;

    private Collisionable[] object;

    public Bullet(int screenH) throws IOException {
        this.screenH = screenH;
        positionX = new int[SIZE];
        positionY = new int[SIZE];
        type = new int[SIZE];
        Loader imageLoader = Loader.getInstance();
        gfx = new Image[]{
            imageLoader.getImage("/gfx/bullet/0.png"),
            imageLoader.getImage("/gfx/bullet/1.png")
        };
    }

    // магия - все пули исчезают
    public void setNull() {
        for (int i = 0; i < SIZE; i++) {
            type[i] = NULL;
        }
    }

    public void setCollisionable(Collisionable[] object) {
        this.object = object;
    }

    public void update() {
        for (int i = 0; i < SIZE; i++) {
            if (type[i] == NULL) {
                continue;
            }
            collision(i);
            positionY[i] += (type[i] * 2 - 1) * 5;
            if ((positionY[i] < -10) || (positionY[i] > screenH)) {
                type[i] = NULL;
            }
        }
    }

    public void paint(Graphics graphics) {
        for (int i = 0; i < SIZE; i++) {
            if (type[i] == NULL) {
                continue;
            }
            graphics.drawImage(gfx[type[i]], positionX[i], positionY[i], 0);
        }
    }

    // override
    public void fire(int type, int positionX, int positionY) {
        for (int i = 0; i < SIZE; i++) {
            if (this.type[i] != NULL) {
                continue;
            }
            this.type[i] = type;
            this.positionX[i] = positionX;
            this.positionY[i] = positionY;
            break;
        }
    }

    private void collision(int i) {
        for (int j = 0; j < object.length; j++) {
            if (type[i] == object[j].getType()) {
                continue;
            }
            if (object[j].isCollisionOfBullet(positionX[i], positionY[i])) {
                object[j].boomOfBullet();
                type[i] = NULL;
                break;
            }
        }
    }
}