Tanks.java

package lesson3;

import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.WindowConstants;

/**
 * @version 3.0
 */
public class Tanks extends JPanel {

	final boolean COLORDED_MODE = false;
	
	final int BF_WIDTH = 576;
	final int BF_HEIGHT = 576;
	
	// 1 - top, 2 - bottom, 3 - left, 4 - right
	int tankDirection = 1;

	int tankX = 128;
	int tankY = 512;
	
	int bulletX = -100;
	int bulletY = -100;
	
	int speed = 10;
	int bulletSpeed = 5;

	String[][] battleField = {
			{"B", " ", "B", "B", "B", " ", "B", "B", "B"},
			{"B", " ", " ", " ", " ", " ", " ", " ", "B"},
			{"B", "B", " ", " ", "B", " ", " ", "B", " "},
			{"B", " ", "B", " ", " ", " ", "B", " ", "B"},
			{"B", " ", "B", " ", " ", "B", " ", " ", "B"},
			{" ", " ", " ", "B", " ", "B", " ", "B", "B"},
			{"B", "B", " ", " ", " ", " ", " ", "B", "B"},
			{" ", " ", " ", "B", "B", "B", " ", " ", "B"},
			{"B", " ", "B", "B", " ", " ", " ", " ", "B"}};
	
	/**
	 * Write your code here.
	 */
	void runTheGame() throws Exception {
		
		fire();
	}
	
	void initTanks() {
		
		int[] randomQuadrant = getRandomQuadrant();
		while (battleField[randomQuadrant[1]][randomQuadrant[0]].equals("B")) {
			randomQuadrant = getRandomQuadrant();
		}
		tankX = randomQuadrant[0] * 64;
		tankY = randomQuadrant[1] * 64;
	}
	
	int[] getRandomQuadrant() {
		
		int[] randomNumbers = getRandomNumbers();
		for (int i = 0; i < randomNumbers.length; i++) {
			
			if (randomNumbers[i] > 8) {
				randomNumbers[i] = randomNumbers[i] - 1;
			}
		}
		return randomNumbers;
	}
	
	boolean processInterception() {
		
		if (isOnTheField()) {
			
			if (removeBrick(false)) {
				bulletX = -100; 
				bulletY = -100;
			}
			return false;
		}
		return true;
	}
	
	boolean isOnTheField() {
		
		if ((bulletX > 0 &&  bulletX < 575) && (bulletY > 0 &&  bulletY < 575)) {
			return true;
		}
		return false;
	}
	
	boolean removeBrick(boolean removeType) {
		
		String quadrant;
		
		if (removeType) {
			quadrant = getQuadrant(tankX, tankY);
		}
		else quadrant = getQuadrant(bulletX, bulletY);
		
		int i = Integer.parseInt(quadrant.substring(0, quadrant.indexOf("_")));
		int j = Integer.parseInt(quadrant.substring(quadrant.indexOf("_") + 1, quadrant.length()));
		
		if (battleField[i][j] == "B") {
			battleField[i][j] = " ";
			repaint();
			return true;
		}
		return false;
	}
		
	String getQuadrant(int v, int h) {
		
		int x = v / 64;
		int	y = h / 64;
			
		return y + "_" + x;
	}
	
	void fire() throws InterruptedException {
		
		bulletX = tankX + 25;
		bulletY = tankY + 25;
		
		while (isOnTheField()) {
			runBullet();
		}
	}
	
	void runBullet() throws InterruptedException {
		
		for (int i = 0; i < 64; ) {
			
			if (tankDirection == 1) {
				bulletY -= 1;
			}
			else if (tankDirection == 2) {
				bulletY += 1;
			}
			else if (tankDirection == 3) {
				bulletX -= 1;
			}
			else if (tankDirection == 4) {
				bulletX += 1;
			}
			processInterception();
			repaint();
			Thread.sleep(bulletSpeed);
			break;	
		}
	}

	String getQuadrantXY(int v, int h) {
		
		return (v - 1) * 64 + "_" + (h - 1) * 64;
	}

	void move(int direction) throws Exception {
		
		repaint();
		Thread.sleep(speed);
		turn(direction);
		moveTank();
	}
	
	void moveTank() throws InterruptedException {
		
		for (int i = 0; i < 64; i++) {
			
			if (tankDirection == 1) {
				
				if (tankY !=0) {
					tankY -= 1;
				}
				else System.out.println("Wrong direction");
			}
			else if (tankDirection == 2) {
				
				if (tankY != 512) {
					tankY += 1;
				}
				else System.out.println("Wrong direction");
			}
			else if (tankDirection == 3) {
				
				if (tankX != 0) {
					tankX -= 1;
				}
				else System.out.println("Wrong direction");
			}
			else if (tankDirection == 4) {
				
				if (tankX != 512) {
					tankX += 1;
				}
				else System.out.println("Wrong direction");
			}
			repaint();
			Thread.sleep(speed);
		}
		removeBrick(true);
		System.out.println(tankY + "_" + tankX);
	}
	
	void turn(int direction) {
			
		tankDirection = direction;
	}
	
	void moveRandom() throws InterruptedException {
		
		 while (true) {
			int direction = getRandomDirection();
			repaint();
			Thread.sleep(speed);
			
			if (direction == 1) {
				
				if (tankY !=0) {
					tankY -= 64;
					repaint();
					System.out.println("Up: " + tankX + "_" + tankY);
					Thread.sleep(speed * 2);
				}
				else System.out.println("Wrong direction");
			}
				
			else if (direction == 2) {
				
				if (tankY != 512) {
					tankY += 64;
					repaint();
					System.out.println("Down: " + tankX + "_" + tankY);
					Thread.sleep(speed * 2);
				}
				else System.out.println("Wrong direction");
			}
			
			else if (direction == 3) {
				
				if (tankX != 0) {
					tankX -= 64;
					repaint();
					System.out.println("Left: " + tankX + "_" + tankY);
					Thread.sleep(speed * 2);
				}
				else System.out.println("Wrong direction");
			}
			
			else if (direction == 4) {
				
				if (tankX != 512) {
					tankX += 64;
					repaint();
					System.out.println("Right: " + tankX + "_" + tankY);
					Thread.sleep(speed * 2);
				}
				else System.out.println("Wrong direction");
			}
		}
	}
	
	int getRandomDirection(){
		
		int direction = 0;
		int[] randomNumbers = getRandomNumbers();
		int randNumInt1 = randomNumbers[0];
		int randNumInt2 = randomNumbers[1];
		
		if (randNumInt1 > randNumInt2) {
			
			if (randNumInt1 % 2 == 0) {
				direction = 1;
			}
			else {
				direction = 2;
			}
		}
		else {
			
			if (randNumInt2 % 2 == 0) {
				direction = 3;
			}
			else {
				direction = 4;
			}
		}
		return direction;
	}
	
	int[] getRandomNumbers() {
		
		String randNum = String.valueOf(System.currentTimeMillis());
		String randNum1 = randNum.substring(randNum.length()-1);
		String randNum2 = randNum.substring(randNum.length()-2, randNum.length()-1);
		int randNumInt1 = Integer.parseInt(randNum1);
		int randNumInt2 = Integer.parseInt(randNum2);
		int[] randomNumbers = {randNumInt1, randNumInt2};
		return randomNumbers;
	}
	
	void moveToQuadrant(int v, int h) throws Exception {
		
		repaint();
		Thread.sleep(speed);
		String quadrant = getQuadrant(v, h);
		int lineIndex = quadrant.indexOf("_");
		int tankXNew = 64 * Integer.parseInt(quadrant.substring(0, lineIndex));
		int tankYNew = 64 * Integer.parseInt(quadrant.substring(lineIndex+1));
		
		if ((tankXNew - tankX) > 0) {
			int steps = (tankXNew - tankX) / 64;
			for (int step = 0; step < steps; step++) {
				move(4);
			}
		}
		else if ((tankXNew - tankX) < 0) {
			int steps = Math.abs((tankXNew - tankX) / 64);
			for (int step = 0; step < steps; step ++) {
				move(3);
			}
		}
		if ((tankYNew - tankY) > 0) {
			int steps = (tankYNew - tankY) / 64;
			for (int step = 0; step < steps; step++) {
				move(2);
			}
		}
		else if ((tankYNew - tankY) < 0) {
			int steps = Math.abs((tankY - tankYNew) / 64);
			for (int step = 0; step < steps; step ++) {
				move(1);
			}
		}
	}
	
	void clean() throws Exception {
		
		turn(3);
		while (isEmptyX()) {
			fire();
		}
		
		moveToQuadrant(tankY, 0);
		turn(1);
		while (isEmptyY()) {
			fire();
		}
		
		moveToQuadrant(0, 0);
		turn(4);
		while (isEmptyX()) {
			fire();
		}
		
		for (int i = 0; i < battleField.length; i++) {
			moveToQuadrant(0, i * 64);
			turn(2);
			while (isEmptyY()) {
				fire();
			}
		}
	}
	
	boolean isEmptyY() {
		
		int index = tankX / 64;
		int firstPoint = 0;
		int endPoint = tankY / 64;
		
		if (tankDirection == 2) {
			firstPoint = tankY / 64;
			endPoint = battleField[index].length;
		}
		
		for (int i = firstPoint; i < endPoint; i++) {
			
			 if (battleField[i][index] == "B") {
				 return true;
			 } 
		}
		return false;
	}
	
	boolean isEmptyX() {
		
		int index = tankY / 64;
		int firstPoint = 0;
		int endPoint = tankX / 64;
		
		if (tankDirection == 4) {
			firstPoint = tankX / 64;
			endPoint = battleField[index].length;
		}
		
		for (int i = firstPoint; i < endPoint; i++) {
			
			 if (battleField[index][i] == "B") {
				 return true;
			 } 
		}
		return false;
	}
	// Magic bellow. Do not worry about this now, you will understand everything in this course.
	// Please concentrate on your tasks only.
	
	
	public static void main(String[] args) throws Exception {
		
		Tanks bf = new Tanks();
		bf.initTanks();
		bf.clean();
	}

	public Tanks() throws Exception {
		JFrame frame = new JFrame("BATTLE FIELD, DAY 2");
		frame.setLocation(750, 150);
		frame.setMinimumSize(new Dimension(BF_WIDTH, BF_HEIGHT + 22));
		frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
		frame.getContentPane().add(this);
		frame.pack();
		frame.setVisible(true);
	}

	@Override
	protected void paintComponent(Graphics g) {
		super.paintComponent(g);
		
		int i = 0;
		Color cc;
		for (int v = 0; v < 9; v++) {
			for (int h = 0; h < 9; h++) {
				if (COLORDED_MODE) {
					if (i % 2 == 0) {
						cc = new Color(252, 241, 177);
					} else {
						cc = new Color(233, 243, 255);
					}
				} else {
					cc = new Color(180, 180, 180);
				}
				i++;
				g.setColor(cc);
				g.fillRect(h * 64, v * 64, 64, 64);
			}
		}
		
		for (int j = 0; j < battleField.length; j++) {
			for (int k = 0; k < battleField.length; k++) {
				if (battleField[j][k].equals("B")) {
					String coordinates = getQuadrantXY(j + 1, k + 1);
					int separator = coordinates.indexOf("_");
					int y = Integer.parseInt(coordinates.substring(0, separator));
					int x = Integer.parseInt(coordinates.substring(separator + 1));
					g.setColor(new Color(0, 0, 255));
					g.fillRect(x, y, 64, 64);
				}
			}
		}
		
		g.setColor(new Color(255, 0, 0));
		g.fillRect(tankX, tankY, 64, 64);
		
		g.setColor(new Color(0, 255, 0));
		if (tankDirection == 1) {
			g.fillRect(tankX + 20, tankY, 24, 34);
		} else if (tankDirection == 2) {
			g.fillRect(tankX + 20, tankY + 30, 24, 34);
		} else if (tankDirection == 3) {
			g.fillRect(tankX, tankY + 20, 34, 24);
		} else {
			g.fillRect(tankX + 30, tankY + 20, 34, 24);
		}
		
		g.setColor(new Color(255, 255, 0));
		g.fillRect(bulletX, bulletY, 14, 14);
	}
}