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package niewiemco1;
import javax.swing.*;
import java.util.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.Timer;
import javax.swing.event.*;

public class NieWiemCo1 {


    public static void main(String[] args) {
        // TODO code application logic here
        Okno o = new Okno("Test", 200, 100, 800, 800, Color.gray);
    }

}

 class Okno extends JFrame
{
    private Container tlo;

    public Okno(String tyt, int x, int y, int szer, int wys, Color t)
    {
      //budujemy okno
      super(tyt);
      setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      setBounds(x,y,szer,wys);
      tlo = getContentPane();
      tlo.setBackground(t);
      BudujUI(); //buduje user interface
      setVisible(true);
    }


private void BudujUI()
    {
        //tworzymy panel
        final MojPanel mp = new MojPanel(Color.yellow, Color.black);
        tlo.setLayout(new BorderLayout());
        JPanel gorny = new JPanel();
        gorny.setBackground(Color.blue);

        //robimy przyciski i dodajemy listenery
        JButton Start = new JButton("Start");
        Start.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e)
            {
                mp.zegarOn();
            }
        });

        JButton Stop = new JButton("Stop");
        Stop.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e)
            {
                mp.zegarOff();
            }
        });

        JButton Koniec = new JButton("Koniec");
        Koniec.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e)
            {
                mp.zegarOff();
                dispose();
            }
        });

        JButton Dodaj = new JButton("Dodaj");
        Dodaj.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e)
            {
                mp.addBall();
            }
        });

        JButton Usun = new JButton("Usun");
        Usun.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e)
            {
                mp.deleteBall();
            }
        });

        JButton disco = new JButton("disco");
        disco.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e)
            {
                mp.discoSwitch();
            }
        });



        class SliderPanel extends JComponent {
            JSlider slider;
            JLabel label;

            SliderPanel() {
                setLayout(new BorderLayout());

                slider = new JSlider(0,70,25);
                slider.addChangeListener(new ChangeListener() {
                    @Override
                    public void stateChanged(ChangeEvent e)
                    {
                        mp.changeDelay(slider.getValue());
                    }
                });

                label = new JLabel("Prędkość");

                add(label,BorderLayout.CENTER);
                add(slider,BorderLayout.SOUTH);

            }
        }

        SliderPanel sliderPanel = new SliderPanel();

        gorny.add(sliderPanel);
        gorny.add(disco);
        gorny.add(Start);
        gorny.add(Stop);
        gorny.add(Koniec);
        gorny.add(Dodaj);
        gorny.add(Usun);
        //gorny.add(slider);

       tlo.add(gorny,BorderLayout.NORTH);
       tlo.add(mp,BorderLayout.CENTER);

    }
}

class MojPanel extends JPanel
{
    class Ball
    {
        public int x,  y,  vx,  vy,  r;
        Ball(int ax, int ay, int avx, int avy, int ar)
        {
            x = ax;
            y = ay;
            vx = avx;
            vy = avy;
            r = ar;
        }

    }

    ArrayList<Ball> ball = new ArrayList<Ball>();
    Color[] col = {Color.black, Color.blue, Color.cyan, Color.red, Color.magenta, Color.green, Color.orange, Color.gray};
    int ballSize;
    protected int red,  blue,   green,  count;
    Random rand = new Random();
    boolean disco = false;

    private Timer tim;
    int wid, hei;
    private Color k_tlo, k_ramka;
    public MojPanel(Color ak_tlo, Color ak_ramka)
    {
        super();
        wid=200;
        hei=200;
        addStartingBalls();

        k_tlo = ak_tlo;
        k_ramka = ak_ramka;
        setBackground(k_tlo);
        Random rand = new Random();
        int r = rand.nextInt(12);
        //Timer z akcją co sek
        tim = new Timer(10,new ActionListener()
        {
            @Override
            public void actionPerformed(ActionEvent e)
            {
                //sprawdzenie czy nie ma sciany ani innych obiektow
                checkMove();
                checkObjects();

                //rysowanie w innym miejscu
                repaint();
            }
        });

    }

    @Override
    public void paintComponent(Graphics g)
    {
        super.paintComponent(g);
        wid = getWidth();
        hei = getHeight();
        ballSize = ball.size();
        int j;
        //g.setColor(Color.black);
       // g.drawString(""+ballSize,100,100);
        if (disco) {
            count++;
            for(int i = 0; i< ballSize; i++) {
                j=(i+(count/7))%col.length;
                g.setColor(col[j]);
                g.fillOval(ball.get(i).x-ball.get(i).r,ball.get(i).y-ball.get(i).r,2*ball.get(i).r,2*ball.get(i).r);
                //setBackground(col[j]);
           }
        }
        else {
            for(int i = 0; i< ballSize; i++) {
             j=(i+(count/7))%col.length;
             g.setColor(col[j]);
             g.fillOval(ball.get(i).x-ball.get(i).r,ball.get(i).y-ball.get(i).r,2*ball.get(i).r,2*ball.get(i).r);}
        }


    }

     public void addStartingBalls()
    {
        addBall(150, 150, 1, 1, 30);
        addBall(250, 250, 2, 1, 40);
        addBall(350, 150, 1, 2, 30);
        addBall(150, 350, 2, 2, 50);
        addBall(200, 200, 1, 1, 20);
        addBall(300, 200, 1, 1, 25);
        addBall();
        addBall();
        addBall();
    }

    public void addBall(int x, int y, int vx, int vy, int r) {
            ball.add(new Ball(x, y, vx, vy, r));
    }

    public void addBall() {
        if(ball.size()<20){
        Random rand = new Random();
        int r = rand.nextInt(31)+20;
        int x = rand.nextInt(wid-r)+r;
        int y = rand.nextInt(hei-r)+r;
        int vx = rand.nextInt(2)+1;
        int yx = rand.nextInt(2)+1;


        addBall(x,y,vx,yx,r);
        int lastBall = ball.size()-1;
        if (checkCollision(lastBall)||checkBorderXCollision(lastBall)||checkBorderYCollision(lastBall)) {
            deleteBall();
            addBall();
            }
        }
        else
            JOptionPane.showMessageDialog(null,"Ograniczenie do 20 kulek","Ogranieczenie",JOptionPane.ERROR_MESSAGE);
    }

    public void deleteBall() {
       if(ball.size()==0)
        JOptionPane.showMessageDialog(null,"Nie ma kulek do usuniecia","Brak kul",JOptionPane.ERROR_MESSAGE);
       else
           ball.remove(ball.size()-1);
    }

    public void checkMove()
        {
        //sprawdzanie kolizjii i zmiana wektorow ze scianami
        for(int i = 0; i < ball.size(); i++)
           {
               if(checkBorderXCollision(i))
               {
                    ball.get(i).vx = -ball.get(i).vx;

               }

               if(checkBorderYCollision(i))
               {
                    ball.get(i).vy = -ball.get(i).vy;
               }
               moveBalls(i);
           }
        }

    private boolean checkBorderXCollision (int i) {
        if ( ball.get(i).x >= (wid - ball.get(i).r) || ball.get(i).x <= ball.get(i).r) return true;
        else return false;
    }

    private boolean checkBorderYCollision (int i) {
        if( ball.get(i).y >= (hei - ball.get(i).r) || ball.get(i).y <= ball.get(i).r  ) return true;
        else return false;
    }

    public void checkObjects()
    {
    //sprawdza kolizje z innymi objektami
    for(int j = 0; j < ball.size(); j++)
        {
            if (checkCollision(j)) {
                ball.get(j).vx = -ball.get(j).vx;
                ball.get(j).vy = -ball.get(j).vy;
            }
        }
    }

    public boolean checkCollision(int j) {
            for(int k = 0; k <  ball.size(); k++)
                {
                    if (k==j) continue;

                    if(pythagoras(ball.get(j).x, ball.get(j).y, ball.get(k).x, ball.get(k).y, ball.get(k).r, ball.get(j).r))
                    {
                        return true;
                    }
                }
        return false;
    }

    public boolean pythagoras(int ax, int ay, int bx, int by, int ar, int br)
    {
    //z pitagorasa
    if(Math.sqrt((bx-ax)*(bx-ax)+(by-ay)*(by-ay)) <= ar+ br)
    {return true;}
    else
    {return false;}
    }

     private void moveBalls(int i) {
        ball.get(i).x += ball.get(i).vx;
        ball.get(i).y += ball.get(i).vy;
    }

    public void zegarOn()
    {
        tim.start();
    }
    public void zegarOff()
    {
        tim.stop();
    }

    public void changeDelay(int speed)
    {
        int delay = 70;
        tim.setDelay(delay-speed);
    }


    public void discoSwitch() {
        disco = !disco;
    }


}