import java.applet.Applet;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Point;
import java.awt.Polygon;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.image.BufferedImage;

import javax.swing.JFrame;

public class HelicopterGame extends Applet implements MouseListener {

    private static final long serialVersionUID = 1L;

    int screen;
    double direction;
    boolean goingUp;
    double heliHeight;
    int distance;
    Polygon playArea;
    int maxchange;

    BufferedImage canvas;
    Graphics2D g2;

    public static void main(String[] args) {
        JFrame frame = new JFrame("Helicopter Game");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        Applet game = new HelicopterGame();
        game.setSize(600, 500);
        game.setPreferredSize(new Dimension(600, 500));
        frame.add(game);
        frame.pack();
        game.init();
        game.start();
        frame.setVisible(true);
    }

    public void init() {
        setSize(600, 500);
        setPreferredSize(new Dimension(600, 500));
        screen = 0;
        heliHeight = 250;
        distance = 0;
        goingUp = false;
        direction = 0;
        int[] areax = new int[62];
        int[] areay = new int[62];
        for (int i = 0; i <= 30; i++) {
            areax[i] = i * 20;
            areax[61 - i] = i * 20;
            areay[i] = 100;
            areay[61 - i] = 400;
        }
        playArea = new Polygon(areax, areay, 62);
        addMouseListener(this);
    }

    public void start() {
        canvas = new BufferedImage(600, 500, BufferedImage.TYPE_INT_ARGB);
        g2 = canvas.createGraphics();
        new Engine(this);
    }

    public void update(Graphics g) {
        paint(g);
    }

    public void paint(Graphics g) {
        if (g2 != null) {
            g2.setColor(Color.GRAY);
            g2.fillRect(0, 0, 600, 500);
            g2.setColor(Color.BLACK);
            g2.fillPolygon(playArea);
            g2.setColor(Color.WHITE);
            g2.setFont(new Font("Arial", Font.BOLD, 12));
            g2.drawString("Distance: " + (distance / 5), 10, 20);
            g2.drawString("By: XThexder (zackwiny)", 450, 20);
            g2.setColor(new Color(0, 100, 0));
            g2.fillRect(275, (int) heliHeight - 25, 50, 50);
            g2.setColor(new Color(100, 100, 100));
            if (!playArea.contains(new Point(275, (int) heliHeight - 25))) g2.fillRect(275, (int) heliHeight - 25, 25, 25);
            if (!playArea.contains(new Point(325, (int) heliHeight - 25))) g2.fillRect(300, (int) heliHeight - 25, 25, 25);
            if (!playArea.contains(new Point(275, (int) heliHeight + 25))) g2.fillRect(275, (int) heliHeight, 25, 25);
            if (!playArea.contains(new Point(325, (int) heliHeight + 25))) g2.fillRect(300, (int) heliHeight, 25, 25);
            g2.setFont(new Font("Arial Black", Font.BOLD, 48));
            if (screen == 0) {
                g2.setColor(Color.WHITE);
                g2.drawString("Click to start", 110, 150);
            } else if (screen == 2) {
                g2.setColor(Color.RED);
                g2.drawString("Game over", 140, 150);
                g2.setFont(new Font("Arial", Font.BOLD, 24));
                g2.drawString("Your score: " + (distance / 5), 160, 200);
                g2.drawString("Your time: " + (distance / 100.0) + " seconds", 160, 225);
            } else if (screen == 3) {
                g2.setColor(Color.RED);
                g2.drawString("Click to restart", 85, 150);
                g2.setFont(new Font("Arial", Font.BOLD, 24));
                g2.drawString("Your score: " + (distance / 5), 160, 200);
                g2.drawString("Your time: " + (distance / 100.0) + " seconds", 160, 225);
            }
            g.drawImage(canvas, 0, 0, null);
        }
    }

    public void mouseClicked(MouseEvent e) {}
    public void mouseEntered(MouseEvent e) {}
    public void mouseExited(MouseEvent e) {}

    public void mousePressed(MouseEvent e) {
        if (screen == 0 || screen == 3) {
            heliHeight = 250;
            distance = 0;
            maxchange = 5;
            direction = 0;
            for (int i = 0; i <= 30; i++) {
                playArea.ypoints[i] = 100;
                playArea.ypoints[61 - i] = 400;
            }
            playArea.invalidate();
            screen = 1;
        }
        goingUp = true;
    }

    public void mouseReleased(MouseEvent e) {
        goingUp = false;
    }

}

class Engine implements Runnable {

    HelicopterGame theApplet;
    boolean direction;
    long timer;

    public Engine(HelicopterGame applet) {
        theApplet = applet;
        direction = false;
        timer = 0;
        new Thread(this).start();
    }

    public void run() {
        while (true) {
            theApplet.repaint();
            if (theApplet.screen == 1) {
                if (theApplet.goingUp) theApplet.direction -= 1.4;
                else theApplet.direction += 1;
                theApplet.direction = Math.max(Math.min(theApplet.direction, 40), -35);
                theApplet.heliHeight += theApplet.direction / 10.0;
                theApplet.distance++;
                if (!theApplet.playArea.contains(new Point(275, (int) theApplet.heliHeight - 25)) ||
                        !theApplet.playArea.contains(new Point(325, (int) theApplet.heliHeight - 25)) ||
                        !theApplet.playArea.contains(new Point(275, (int) theApplet.heliHeight + 25)) ||
                        !theApplet.playArea.contains(new Point(325, (int) theApplet.heliHeight + 25))) {
                    theApplet.screen = 2;
                    timer = System.currentTimeMillis() + 2000;
                } else if (theApplet.distance % 3 == 0) {
                    for (int i = 0; i < 30; i++) {
                        theApplet.playArea.ypoints[i] = theApplet.playArea.ypoints[i + 1];
                        theApplet.playArea.ypoints[61 - i] = theApplet.playArea.ypoints[60 - i];
                    }
                    int change = direction ? random(-theApplet.maxchange, 0) : random(0, theApplet.maxchange);
                    if (theApplet.distance % 200 == 0) theApplet.maxchange++;
                    theApplet.playArea.ypoints[30] = theApplet.playArea.ypoints[29] + change;
                    theApplet.playArea.ypoints[31] = theApplet.playArea.ypoints[32] + change;
                    if (theApplet.playArea.ypoints[30] <= 0) {
                        direction = !direction;
                        theApplet.playArea.ypoints[30] = 1;
                    } else if (theApplet.playArea.ypoints[31] >= 500) {
                        direction = !direction;
                        theApplet.playArea.ypoints[31] = 499;
                    } else if (random(0, 50) == 1) {
                        direction = !direction;
                    }
                    theApplet.playArea.invalidate();
                    //theApplet.heliHeight = (theApplet.playArea.ypoints[14] + theApplet.playArea.ypoints[46]) / 2;
                }
            } else if (theApplet.screen == 2 && timer - System.currentTimeMillis() <= 0) theApplet.screen = 3;
            try {
                Thread.sleep(10);
            } catch (InterruptedException e) {
                return;
            }
        }
    }

    private int random(int a, int b) {
        return (int) (Math.random() * (b - a + 1)) + a;
    }

}