package de.craftix.game;

import javax.swing.*;
import java.awt.*;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.util.Random;

public class Minesweeper extends JFrame {
    public static boolean showMines = false;
    public static int percentage = 20;
    public static int spacing = 5;
    public static boolean loose = false;
    public static boolean win = false;

    public static Random rand = new Random();
    public static Board board = new Board();

    public static int[][] neighbours = new int[16][9];
    public static boolean[][] mines = new boolean[16][9];
    public static boolean[][] revealed = new boolean[16][9];
    public static boolean[][] flagged = new boolean[16][9];

    public static void main(String[] args) {
        new Minesweeper(1280, 800);
    }

    public Minesweeper(int width, int height) {
        for (int x = 0; x < 16; x++) for (int y = 0; y < 9; y++) mines[x][y] = (rand.nextInt(100) < percentage);

        for (int x = 0; x < 16; x++) {
            for (int y = 0; y < 9; y++) {
                revealed[x][y] = true;
                flagged[x][y] = false;
                neighbours[x][y] = getNeighbours(x, y);
            }
        }
        revealed[0][0] = false;
        revealed[1][0] = false;
        mines[0][0] = true;

        setTitle("Minesweeper");
        setSize(width + 17, height + 40);
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        setResizable(false);
        setLocationRelativeTo(null);
        setVisible(true);
        setContentPane(board);
    }

    private static class Board extends JPanel {
        public Board() { addMouseListener(new Click()); }

        @Override
        protected void paintComponent(Graphics g) {
            super.paintComponent(g);
            ((Graphics2D)g).setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_OFF);
            g.setColor(Color.DARK_GRAY);
            g.fillRect(0, 0, getWidth(), getHeight());

            for (int x = 0; x < 16; x++) {
                for (int y = 0; y < 9; y++) {
                    g.setColor(Color.GRAY);
                    if (showMines && mines[x][y]) g.setColor(Color.YELLOW);
                    if (getScreenPos(x, y).contains(mousePos())) g.setColor(Color.LIGHT_GRAY);
                    if (revealed[x][y]) {
                        ((Graphics2D) g).draw(getScreenPos(x, y));
                        if (mines[x][y]) {
                            g.setColor(Color.RED);
                            ((Graphics2D) g).fill(getScreenPos(x, y));
                            loose = true;
                        }else {
                            g.setColor(Color.WHITE);
                            g.setFont(new Font("Tahoma", Font.BOLD, 40));
                            g.drawString(Integer.toString(neighbours[x][y]), x * 80 + 27, y * 80 + 135);
                        }
                    }
                    else ((Graphics2D) g).fill(getScreenPos(x, y));
                }
            }

            repaint();
        }
    }

    private static class Click implements MouseListener {

        @Override
        public void mouseClicked(MouseEvent e) {
            System.out.println(checkWinning());
            if (loose || win) return;
            if (checkWinning()) return;
            Point box = inBox(e.getX(), e.getY());
            if (box == null) return;
            revealed[box.x][box.y] = true;
        }

        @Override
        public void mousePressed(MouseEvent e) {

        }

        @Override
        public void mouseReleased(MouseEvent e) {

        }

        @Override
        public void mouseEntered(MouseEvent e) {

        }

        @Override
        public void mouseExited(MouseEvent e) {

        }
    }

    private static boolean checkWinning() {
        int open = 0, bombs = 0;
        for (int x = 0; x < 16; x++) for (int y = 0; y < 9; y++) {
            if (revealed[x][y] && !mines[x][y]) open++;
            if (mines[x][y]) bombs++;
        }
        return (open + bombs - 1) == (16 * 9);
    }

    private static Point inBox(int mx, int my) {
        for (int x = 0; x < 16; x++) {
            for (int y = 0; y < 9; y++) {
                if (getScreenPos(x, y).contains(mx, my)) return new Point(x, y);
            }
        }
        return null;
    }

    private static int getNeighbours(int x, int y) {
        int n = 0;
        if (isBomb(x - 1, y - 1)) n++;
        if (isBomb(x - 1, y)) n++;
        if (isBomb(x - 1, y + 1)) n++;
        if (isBomb(x + 1, y - 1)) n++;
        if (isBomb(x + 1, y)) n++;
        if (isBomb(x + 1, y + 1)) n++;
        if (isBomb(x, y + 1)) n++;
        if (isBomb(x, y - 1)) n++;
        return n;
    }

    private static boolean isBomb(int x, int y) { try { return mines[x][y]; } catch (Exception ignored) { return false; } }

    private static Point mousePos() {
        Point p = MouseInfo.getPointerInfo().getLocation();
        SwingUtilities.convertPointFromScreen(p, board);
        return p;
    }

    private static Rectangle getScreenPos(int x, int y) { return new Rectangle(spacing + x * 80, spacing + y * 80 + 80, 80 - spacing * 2, 80 - spacing * 2); }

}