package V17;

import java.awt.*;
import java.awt.event.*;

public class Tank {
	public static final int XSPEED = 5;
	public static final int YSPEED = 5;

	public static final int WIDTH = 30;
	public static final int HEIGHT = 30;

	//����TankClient�����ã��������ʹ�����еij�Ա����
	TankClient tc = null;

	private int x, y;

	private boolean good;

	private boolean live = true;

	//�Ƿ�����4�����������Ӽ�¼����״̬�IJ�����
	private boolean bL = false, bU = false, bR = false, bD = false;
	//��Ա����������
	enum Direction {L, LU, U, RU, R, RD, D, LD, STOP};

	private Direction dir = Direction.STOP;

	//ptDir������Ͳ�ķ���Ĭ�Ϸ�������
	private Direction ptDir = Direction.D;

	public boolean isLive() {
		return live;
	}

	public void setLive(boolean live) {
		this.live = live;
	}

	public int getX() {
		return x;
	}

	public int getY() {
		return y;
	}

	public Tank(int x, int y, boolean good) {//x��y ֵ��С��������Ͻǵ�
		this.x = x;
		this.y = y;
		this.good = good;
	}

	public Tank(int x, int y, boolean good, TankClient tc) {//���������Ĺ��췽��
		this(x, y, good);
		this.tc = tc;
	}

	public void draw(Graphics g) {
		if(!live) return;
		Color c = g.getColor();
		//�Բ�ͬ����ɫ����ʾ��ͬ��̹��
		if(good) {
			g.setColor(Color.RED);
		}
		else {
			g.setColor(Color.BLUE);
		}
		g.fillOval(x, y, WIDTH, HEIGHT);
		g.setColor(c);
		move();
		
		//�жϳ���Ͳ�ķ��򣬲�ģ�ⷽ����������Ͳ
		switch(ptDir) {
			case L:
				g.drawLine(x + Tank.WIDTH/2, y + Tank.HEIGHT/2, x, y + Tank.HEIGHT/2);
				break;
			case LU:
				g.drawLine(x + Tank.WIDTH/2, y + Tank.HEIGHT/2, x, y);
				break;
			case U:
				g.drawLine(x + Tank.WIDTH/2, y + Tank.HEIGHT/2, x + Tank.WIDTH/2, y);
				break;
			case RU:
				g.drawLine(x + Tank.WIDTH/2, y + Tank.HEIGHT/2, x + Tank.WIDTH, y);
				break;
			case R:
				g.drawLine(x + Tank.WIDTH/2, y + Tank.HEIGHT/2, x + Tank.WIDTH, y + Tank.HEIGHT/2);
				break;
			case RD:
				g.drawLine(x + Tank.WIDTH/2, y + Tank.HEIGHT/2, x + Tank.WIDTH, y + Tank.HEIGHT);
				break;
			case D:
				g.drawLine(x + Tank.WIDTH/2, y + Tank.HEIGHT/2, x + Tank.WIDTH/2, y + Tank.HEIGHT);
				break;
			case LD:
				g.drawLine(x + Tank.WIDTH/2, y + Tank.HEIGHT/2, x, y + Tank.HEIGHT);
				break;
			case STOP:
				break;
		}
	}

	//���ݷ��������һ�����ƶ�
	void move() {
		switch(dir) {
			case L:
				x -= XSPEED;
				break;
			case LU:
				x -= XSPEED;
				y -= YSPEED;
				break;
			case U:
				y -= YSPEED;
				break;
			case RU:
				x += XSPEED;
				y -= YSPEED;
				break;
			case R:
				x += XSPEED;
				break;
			case RD:
				x += XSPEED;
				y += YSPEED;
				break;
			case D:
				y += YSPEED;
				break;
			case LD:
				x -= XSPEED;
				y += YSPEED;
				break;
			case STOP:
				break;
		}

		//��̹�˵ķ��򴫸���Ͳ��ʹ��Ͳ��̹�˷���һ��
		if(this.dir != Direction.STOP) {
			this.ptDir = this.dir;
		}

		if(x < 0) x = 0;
		if(y < 25) y = 25;
		if(x + Tank.WIDTH > TankClient.GAME_WIDTH) x = TankClient.GAME_WIDTH - Tank.WIDTH;
		if(y + Tank.HEIGHT > TankClient.GAME_HEIGHT) y = TankClient.GAME_HEIGHT - Tank.HEIGHT;

	}

	public void keyPressed(KeyEvent e) {
		int key = e.getKeyCode();
		switch(key) {
			case KeyEvent.VK_LEFT:
				bL = true;
				break;
			case KeyEvent.VK_UP:
				bU = true;
				break;
			case KeyEvent.VK_RIGHT:
				bR = true;
				break;
			case KeyEvent.VK_DOWN:
				bD = true;
				break;
		}
		locateDirection();
	}

	public void keyReleased(KeyEvent e) {
		int key = e.getKeyCode();
		switch(key) {
			//����Ctrlʱ��������
			//ֻ�е�����̧����ʱ����ö�ڵ��ű�����ȥ
			//������һֱ����Ctrl��ʹ���ӵ����������
			case KeyEvent.VK_CONTROL:
				fire();
				break;
			case KeyEvent.VK_LEFT:
				bL = false;
				break;
			case KeyEvent.VK_UP:
				bU = false;
				break;
			case KeyEvent.VK_RIGHT:
				bR = false;
				break;
			case KeyEvent.VK_DOWN:
				bD = false;
				break;
		}
		locateDirection();
	}

	//���ݰ���״̬ȷ�� Tank ����
	void locateDirection() {
		if(bL && !bU && !bR && !bD) dir = Direction.L;
		else if(bL && bU && !bR && !bD) dir = Direction.LU;
		else if(!bL && bU && !bR && !bD) dir = Direction.U;
		else if(!bL && bU && bR && !bD) dir = Direction.RU;
		else if(!bL && !bU && bR && !bD) dir = Direction.R;
		else if(!bL && !bU && bR && bD) dir = Direction.RD;
		else if(!bL && !bU && !bR && bD) dir = Direction.D;
		else if(bL && !bU && !bR && bD) dir = Direction.LD;
		else if(!bL && !bU && !bR && !bD) dir =Direction.STOP;
	}

	public Missile fire() {
		//��֤�ӵ���Tank���м����
		int x = this.x + Tank.WIDTH / 2 - Missile.WIDTH / 2;
		int y = this.y + Tank.HEIGHT / 2 - Missile.WIDTH / 2;
		//��Tank���ڵ�λ�úͷ��򴫵ݸ��ӵ�
		//���������ӵ��ij�ʼ����������̹�˾�������������Ͳ����
		Missile missile = new Missile(x, y, ptDir, this.tc);
		//�����ｫmissile���뵽������
		tc.missiles.add(missile);
		return missile;
	}

	public Rectangle getRect() {
		return new Rectangle(x, y, WIDTH, HEIGHT);
	}

}