import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.Rectangle;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;

import javax.swing.ImageIcon;
import javax.swing.JFrame;

public class Display extends JFrame implements Runnable {
    private static final long serialVersionUID = 1L;
    public static String TITLE = "The Box Alpha 0.05";
    public static int WIDTH = 600;
    public static int HEIGHT = 400;

    public int moveSpeed = 5;
    int xChar;
    int yChar;
    int xMouse;
    int yMouse;
    int xLaser;
    int yLaser;
    int xDirection;
    int yDirection;
    int xZombie = 50;
    int yZombie = 50;
    int zSpeed = 1;
    ZombieClass zom = new ZombieClass();
    FPSCounter FPS = new FPSCounter();

    public String Controls = "Movement - ArrowKeys, Shooting - LMB, Sprint - Shift";
    public Image dbImage;
    public Graphics dbg;
    Font font = new Font("Arial", 1, 20);
    Font font2 = new Font("Arial", 1, 15);
    Image charImage;
    Image backImage;
    Image zombieImage;

    public void collide() {
        Rectangle playerRect = new Rectangle(xChar, yChar, 32, 32);
        Rectangle zombieRect = new Rectangle(xZombie, yZombie, 32, 32);

        if (playerRect.intersects(zombieRect)) {
            Graphics g = getGraphics();

            Font font3 = new Font("Arial", 1, 15);

            g.setFont(font3);
            g.setColor(Color.YELLOW);
            g.drawString("Collision!", 200, 150);

            zSpeed = 0;
        } else {
            zSpeed = 1;
        }
    }

    public void run() {

        try {
            while (true) {
                this.FPS.tick();
                move();
                zom.FindCharacter();
                Thread.sleep(10L);

                collide();
            }
        } catch (Exception e) {
            System.out.println("Error in your Run method");
        }
    }

    public void move() {
        xChar += xDirection;
        yChar += yDirection;

        if (xChar <= 0) {
            xChar = 0;
        }
        if (xChar >= WIDTH - 32) {
            xChar = (WIDTH - 32);
        }
        if (yChar <= 24) {
            yChar = 24;
        }
        if (yChar >= HEIGHT - 32)
            yChar = (HEIGHT - 32);
    }

    public void setXDirection(int xdir) {
        xDirection = xdir;
    }

    public void setYDirection(int ydir) {
        yDirection = ydir;
    }

    public Display() {
        backImage = new ImageIcon("res/Textures/Background.png").getImage();
        charImage = new ImageIcon("res/Characters/Character.png").getImage();

        addKeyListener(new Display.AL());
        addMouseListener(new Display.Mouse());

        setTitle(TITLE);
        setSize(WIDTH, HEIGHT);
        setResizable(false);
        setVisible(true);
        setDefaultCloseOperation(3);
        setLocationRelativeTo(null);

        this.xChar = 125;
        this.yChar = 125;

        this.xMouse = (this.xChar + 16);
        this.yMouse = (this.yChar + 16);

        this.xLaser = (this.xChar + 16);
        this.yLaser = (this.yChar + 16);
    }

    public void paint(Graphics g) {
        this.dbImage = createImage(getWidth(), getHeight());
        this.dbg = this.dbImage.getGraphics();
        paintComponent(this.dbg);
        g.drawImage(this.dbImage, 0, 0, this);
    }

    public void paintComponent(Graphics g) {
        g.drawImage(this.backImage, 0, 0, this);
        g.drawImage(this.charImage, this.xChar, this.yChar, this);
        g.drawImage(this.zombieImage, xZombie, yZombie, this);

        g.setColor(Color.YELLOW);
        g.setFont(this.font2);
        g.drawString(this.Controls, 90, 40);

        g.drawString("MoveSpeed: " + this.moveSpeed, 480, 40);

        g.setColor(Color.YELLOW);
        g.setFont(this.font);
        g.drawString("FPS: " + this.FPS.FPS, 5, 40);

        this.xLaser = (this.xChar + 16);
        this.yLaser = (this.yChar + 16);

        g.setColor(Color.YELLOW);
        g.drawLine(this.xChar + 16, this.yChar + 16, this.xLaser, this.yLaser);

        repaint();
    }

    public static void main(String[] args) {
        Display dis = new Display();

        Thread t1 = new Thread(dis);
        t1.start();
    }

    public class AL extends KeyAdapter {
        public AL() {
        }

        public void keyPressed(KeyEvent e) {
            int keyCode = e.getKeyCode();

            if (keyCode == 16) {
                Display.this.moveSpeed = 8;
            }

            if (keyCode == 37) {
                Display.this.setXDirection(-Display.this.moveSpeed);
            }

            if (keyCode == 39) {
                Display.this.setXDirection(Display.this.moveSpeed);
            }

            if (keyCode == 38) {
                Display.this.setYDirection(-Display.this.moveSpeed);
            }

            if (keyCode == 40) {
                Display.this.setYDirection(Display.this.moveSpeed);
            }
            e.consume();
        }

        public void keyReleased(KeyEvent e) {
            int keyCode = e.getKeyCode();

            if (keyCode == 16) {
                Display.this.moveSpeed = 5;
            }

            if (keyCode == 37) {
                Display.this.setXDirection(0);
            }

            if (keyCode == 39) {
                Display.this.setXDirection(0);
            }

            if (keyCode == 38) {
                Display.this.setYDirection(0);
            }

            if (keyCode == 40) {
                Display.this.setYDirection(0);
            }
            e.consume();
        }
    }

    public class FPSCounter {
        public int currentFPS = 0;
        public int FPS = 0;
        public long start = 0L;

        public FPSCounter() {
        }

        public void tick() {
            this.currentFPS += 1;
            if (System.currentTimeMillis() - this.start >= 1000L) {
                this.FPS = this.currentFPS;
                this.currentFPS = 0;
                this.start = System.currentTimeMillis();
            }
        }

        public int getFPS() {
            return this.FPS;
        }
    }

    class Mouse extends MouseAdapter {
        Mouse() {
        }

        public void mousePressed(MouseEvent e) {
            int xCoordinate = e.getX();
            int yCoordinate = e.getY();
            Display.this.xMouse = xCoordinate;
            Display.this.yMouse = yCoordinate;

            Display.this.xLaser = Display.this.xMouse;
            Display.this.yLaser = Display.this.yMouse;
        }

        public void mouseReleased(MouseEvent e) {
            Display.this.xLaser = (Display.this.xChar + 16);
            Display.this.yLaser = (Display.this.yChar + 16);
        }
    }

    public class ZombieClass {

        public ZombieClass() {
            zombieImage = new ImageIcon("res/Characters/Zombie.png").getImage();
        }

        public void FindCharacter() {
            if (xZombie < Display.this.xChar) {
                xZombie += zSpeed;
            }
            if (xZombie > Display.this.xChar) {
                xZombie -= zSpeed;
            }
            if (yZombie < Display.this.yChar) {
                yZombie += zSpeed;
            }
            if (yZombie > Display.this.yChar) {
                yZombie -= zSpeed;
            }

        }
    }
}