import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Rectangle;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.util.ArrayList;
import java.util.Random;

import javax.swing.JFrame;
import javax.swing.Timer;

public class FlappyBird implements ActionListener, MouseListener, KeyListener
{

    public static FlappyBird flappyBird;

    public final int WIDTH = 800, HEIGHT = 800;

    public Renderer renderer;

    public Rectangle bird;

    public ArrayList<Rectangle> columns;

    public int ticks, yMotion, score;

    public boolean gameOver, started;

    public Random rand;

    public FlappyBird()
    {
        JFrame jframe = new JFrame();
        Timer timer = new Timer(20, this);

        renderer = new Renderer();
        rand = new Random();

        jframe.add(renderer);
        jframe.setTitle("Flappy Bird");
        jframe.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        jframe.setSize(WIDTH, HEIGHT);
        jframe.addMouseListener(this);
        jframe.addKeyListener(this);
        jframe.setResizable(false);
        jframe.setVisible(true);

        bird = new Rectangle(WIDTH / 2 - 10, HEIGHT / 2 - 10, 20, 20);
        columns = new ArrayList<Rectangle>();

        addColumn(true);
        addColumn(true);
        addColumn(true);
        addColumn(true);

        timer.start();
    }

    public void addColumn(boolean start)
    {
        int space = 300;
        int width = 100;
        int height = 50 + rand.nextInt(300);

        if (start)
        {
            columns.add(new Rectangle(WIDTH + width + columns.size() * 300, HEIGHT - height - 120, width, height));
            columns.add(new Rectangle(WIDTH + width + (columns.size() - 1) * 300, 0, width, HEIGHT - height - space));
        }
        else
        {
            columns.add(new Rectangle(columns.get(columns.size() - 1).x + 600, HEIGHT - height - 120, width, height));
            columns.add(new Rectangle(columns.get(columns.size() - 1).x, 0, width, HEIGHT - height - space));
        }
    }

    public void paintColumn(Graphics g, Rectangle column)
    {
        g.setColor(Color.green.darker());
        g.fillRect(column.x, column.y, column.width, column.height);
    }

    public void jump()
    {
        if (gameOver)
        {
            bird = new Rectangle(WIDTH / 2 - 10, HEIGHT / 2 - 10, 20, 20);
            columns.clear();
            yMotion = 0;
            score = 0;

            addColumn(true);
            addColumn(true);
            addColumn(true);
            addColumn(true);

            gameOver = false;
        }

        if (!started)
        {
            started = true;
        }
        else if (!gameOver)
        {
            if (yMotion > 0)
            {
                yMotion = 0;
            }

            yMotion -= 10;
        }
    }

    @Override
    public void actionPerformed(ActionEvent e)
    {
        int speed = 10;

        ticks++;

        if (started)
        {
            for (int i = 0; i < columns.size(); i++)
            {
                Rectangle column = columns.get(i);

                column.x -= speed;
            }

            if (ticks % 2 == 0 && yMotion < 15)
            {
                yMotion += 2;
            }

            for (int i = 0; i < columns.size(); i++)
            {
                Rectangle column = columns.get(i);

                if (column.x + column.width < 0)
                {
                    columns.remove(column);

                    if (column.y == 0)
                    {
                        addColumn(false);
                    }
                }
            }

            bird.y += yMotion;

            for (Rectangle column : columns)
            {
                if (column.y == 0 && bird.x + bird.width / 2 > column.x + column.width / 2 - 10 && bird.x + bird.width / 2 < column.x + column.width / 2 + 10)
                {
                    score++;
                }

                if (column.intersects(bird))
                {
                    gameOver = true;

                    if (bird.x <= column.x)
                    {
                        bird.x = column.x - bird.width;

                    }
                    else
                    {
                        if (column.y != 0)
                        {
                            bird.y = column.y - bird.height;
                        }
                        else if (bird.y < column.height)
                        {
                            bird.y = column.height;
                        }
                    }
                }
            }

            if (bird.y > HEIGHT - 120 || bird.y < 0)
            {
                gameOver = true;
            }

            if (bird.y + yMotion >= HEIGHT - 120)
            {
                bird.y = HEIGHT - 120 - bird.height;
                gameOver = true;
            }
        }

        renderer.repaint();
    }

    public void repaint(Graphics g)
    {
        g.setColor(Color.cyan);
        g.fillRect(0, 0, WIDTH, HEIGHT);

        g.setColor(Color.orange);
        g.fillRect(0, HEIGHT - 120, WIDTH, 120);

        g.setColor(Color.green);
        g.fillRect(0, HEIGHT - 120, WIDTH, 20);

        g.setColor(Color.red);
        g.fillRect(bird.x, bird.y, bird.width, bird.height);

        for (Rectangle column : columns)
        {
            paintColumn(g, column);
        }

        g.setColor(Color.white);
        g.setFont(new Font("Arial", 1, 100));

        if (!started)
        {
            g.drawString("Click to start!", 75, HEIGHT / 2 - 50);
        }

        if (gameOver)
        {
            g.drawString("Game Over!", 100, HEIGHT / 2 - 50);
        }

        if (!gameOver && started)
        {
            g.drawString(String.valueOf(score), WIDTH / 2 - 25, 100);
        }
    }

    public static void main(String[] args)
    {
        flappyBird = new FlappyBird();
    }

    @Override
    public void mouseClicked(MouseEvent e)
    {
        jump();
    }

    @Override
    public void keyReleased(KeyEvent e)
    {
        if (e.getKeyCode() == KeyEvent.VK_SPACE)
        {
            jump();
        }
    }

    @Override
    public void mousePressed(MouseEvent e)
    {
    }

    @Override
    public void mouseReleased(MouseEvent e)
    {
    }

    @Override
    public void mouseEntered(MouseEvent e)
    {
    }

    @Override
    public void mouseExited(MouseEvent e)
    {
    }

    @Override
    public void keyTyped(KeyEvent e)
    {

    }

    @Override
    public void keyPressed(KeyEvent e)
    {

    }

}