package ztp08;

import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Point;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.util.Iterator;
import javax.swing.JFrame;
import javax.swing.JPanel;

// pojedynczy kafelek
class Tile {

    // schowek na wartość logiczną
    private boolean value = false;
    // kolory
    private static final Color on = new Color(0xffd700),
            off = new Color(0x1e90ff);

    // odczyt koloru
    public Color getColor() {
        return value ? on : off;
    }

    //zmiana koloru
    public void flip() {
        value = !value;
    }
}

//macierz kafelków
class Kafelki extends JPanel {

    private Tile[][] matrix;
    private int tilesize;
    // kafelek podświetlony (myszką)
    private int hx = -1, hy = -1;

    // inicjalizacja macierzy
    public Kafelki(int cols, int rows, int tilesize) {
        this.setPreferredSize(new Dimension(cols * tilesize, rows * tilesize));
        this.tilesize = tilesize;
        matrix = new Tile[rows][cols];
        for (int i = 0; i < matrix.length; ++i) {
            for (int j = 0; j < matrix[i].length; ++j) {
                matrix[i][j] = new Tile();
            }
        }
    }

    // rysowanie macierzy (oraz jednego podświetlonego)
    @Override
    public void paintComponent(Graphics g) {
        super.paintComponent(g);
        for (int i = 0; i < matrix.length; ++i) {
            for (int j = 0; j < matrix[i].length; ++j) {
                if (i == hy && j == hx) {
                    g.setColor(matrix[i][j].getColor().brighter());
                } else {
                    g.setColor(matrix[i][j].getColor());
                }
                g.fillRect(j * tilesize, i * tilesize + 1, tilesize - 1, tilesize - 1);
            }
        }
    }

    // podświetl
    public void highlight(int x, int y) {
        hx = x;
        hy = y;
        repaint();
    }

    public Tile[][] getMatrix()
    {
        return matrix;
    }
    // trzy poniższe metody znikną w finalnej wersji
//    public int getRows() {
//        return matrix.length;
//    }
//
//    public int getCols() {
//        return matrix[0].length;
//    }
//
//    public Tile getAt(int row, int col) {
//        return matrix[row][col];
//    }

    // za to pojawi się metoda pobierająca iterator
    // public Iterator<Tile> iterator( ...
}


abstract class IteratorKafeleki implements Iterator
{
    private Kafelki kafelki;
    private Point currentItem;

    public void setCurrentItem(int x, int y)
    {
        this.currentItem.x = x;
        this.currentItem.y = y;
    }

    @Override
    public boolean hasNext() {
        Tile[][] matrix = kafelki.getMatrix();
        int x = matrix.length;
        int y = matrix[0].length;
        if (currentItem.x == x && currentItem.y == y)
            return false;
        else
            return true;
    }

    @Override
    public Object next() {
        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
    }

    @Override
    public void remove() {
        throw new UnsupportedOperationException("Not supported yet.");
    }
}

class IteratorLine extends IteratorKafeleki
{
    private Kafelki kafelki;
    private Point currentItem;

    public IteratorLine (Kafelki kafelki)
    {
        this.kafelki = kafelki;
        setCurrentItem(0,0);
    }

    @Override
    public Tile next()
    {
        if (this.hasNext())
        {
            Tile[][] matrix = kafelki.getMatrix();
            int x = matrix.length;
            int y = matrix[0].length;
            if (currentItem.x < x)
            {
                currentItem.x++;
                return matrix[currentItem.x][currentItem.y];
            }
            else if (currentItem.y < y)
            {
                currentItem.x = 0;
                currentItem.y++;
                return matrix[currentItem.x][currentItem.y];
            }
            else
                throw new UnsupportedOperationException("Not supported yet.");
        }
        else
            throw new UnsupportedOperationException("Not supported yet.");
    }

//    @Override
//    public boolean hasNext() {
//        Tile[][] matrix = kafelki.getMatrix();
//        int x = matrix.length;
//        int y = matrix[0].length;
//        if (currentItem.x == x && currentItem.y == y)
//            return false;
//        else
//            return true;
////        bool has = false;
////        Tile[][] matrix = kafelki.getMatrix();
////        try {
////            Tile t = matrix[currentItem.x][currentItem.y];
////            has = true;
////        }
////        catch(Exception ex)
////        {
////            has = false;
////        }
////        finally {
////            return has;
////        }
//    }
}

// ten wątek nie wykorzystuje iteratora
class Watek implements Runnable {
    private Kafelki p;
    private Iterator iterator;
    private int x, y;

    // x, y to początkowa pozycja do iteracji
    public Watek(Iterator iter, int x, int y) {
        this.iterator = iter;
        //this.p = k;
        this.x = x;
        this.y = y;
    }

    public void run() {
        // klasyczna podwójna pętla do iteracji
        // tutaj kontrolujemy kolejność odwiedzin
        // zostanie to zastąpione pętlą z użyciem iteratora
        while(iterator.hasNext())
        {

                p.repaint();
                try {
                    Thread.currentThread().sleep(100);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
        }

    }
}

public class Ztp08 {

    static final int TILESIZE = 40;

    public static void main(String[] args) {

        // konstruowanie okna
        JFrame frame = new JFrame("Iterator");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        final Kafelki kafelki = new Kafelki(16, 9, TILESIZE);
        frame.getContentPane().add(kafelki);
        frame.pack();
        frame.setVisible(true);

        // reakcja na kliknięcie uruchomienie wątku z iteracją
        kafelki.addMouseListener(new MouseAdapter() {

            @Override
            public void mouseClicked(MouseEvent e) {
                int x = e.getX() / TILESIZE;
                int y = e.getY() / TILESIZE;
                new Thread(new Watek(new IteratorLine(kafelki), x, y)).start();
            }
        });
        // reakcja na ruch - podświetlenie wskazanego kafelka
        kafelki.addMouseMotionListener(new MouseAdapter() {

            @Override
            public void mouseMoved(MouseEvent e) {
                int x = e.getX() / TILESIZE;
                int y = e.getY() / TILESIZE;
                kafelki.highlight(x, y);
            }
        });
    }
}