package dev.kske.minesweeper;

import static dev.kske.minesweeper.BoardConfig.*;

import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.awt.event.KeyEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

import javax.swing.*;

/**
 * Project: <strong>Minesweeper</strong><br>
 * File: <strong>Minesweeper.java</strong><br>
 * Created: <strong>21.03.2019</strong><br>
 * Author: <strong>Kai S. K. Engelbart</strong>
 */
public class Minesweeper {

	private static final String VERSION = "1.1";

	private JFrame mframe;

	private Board board;
	private Timer timer;
	private int gameTime;
	private ScoreManager scoreManager;

	/**
	 * Launch the application.
	 * 
	 * @param args command line arguments are ignored
	 */
	public static void main(String[] args) {
		EventQueue.invokeLater(() -> {
			try {
				Minesweeper window = new Minesweeper();
				window.mframe.setVisible(true);
			} catch (Exception e) {
				e.printStackTrace();
			}
		});
	}

	/**
	 * Create the application.
	 * 
	 * @wbp.parser.entryPoint
	 */
	public Minesweeper() {
		initialize();
	}

	/**
	 * Initialize the contents of the frame.
	 */
	private void initialize() {
		try {
			UIManager.setLookAndFeel(UIManager.createLookAndFeel("Nimbus"));
		} catch (Exception ex) {
			ex.printStackTrace();
		}
		mframe = new JFrame();
		mframe.addWindowListener(new WindowAdapter() {

			@Override
			public void windowClosing(WindowEvent e) {
				scoreManager.saveScores();
			}
		});
		mframe.setResizable(false);
		mframe.setTitle("Minesweeper");
		mframe.setBounds(100, 100, 359, 86);
		mframe.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

		createMenuBar();

		board = new Board();
		board.init(EASY);
		mframe.getContentPane().setLayout(new BorderLayout(0, 0));
		mframe.getContentPane().add(board, BorderLayout.CENTER);

		JPanel headerPanel = new JPanel();
		mframe.getContentPane().add(headerPanel, BorderLayout.NORTH);
		headerPanel.setLayout(new BorderLayout(0, 0));

		JButton btnRestart = new JButton("Restart");
		btnRestart.setHorizontalAlignment(SwingConstants.RIGHT);
		headerPanel.add(btnRestart, BorderLayout.EAST);

		JPanel panel = new JPanel();
		headerPanel.add(panel, BorderLayout.WEST);
		panel.setLayout(new BorderLayout(0, 0));

		JLabel lblTime = new JLabel("Time:");
		panel.add(lblTime, BorderLayout.NORTH);

		timer = new Timer(1000, e -> lblTime.setText("Time: " + gameTime++ + "s"));
		timer.setRepeats(true);
		timer.setInitialDelay(0);
		timer.setCoalesce(true);

		JLabel lblRemainingMines = new JLabel("Remaining Mines: " + EASY.mines);
		panel.add(lblRemainingMines, BorderLayout.SOUTH);
		lblRemainingMines.setHorizontalAlignment(SwingConstants.LEFT);
		btnRestart.addActionListener((evt) -> {
			board.reset();
			gameTime = 0;
			timer.restart();
		});
		mframe.pack();

		board.registerGameListener(new GameListener() {

			@SuppressWarnings("incomplete-switch")
			@Override
			public void onGameOverEvent(GameOverEvent evt) {
				timer.stop();
				switch (evt.getGameState()) {
					case LOST:
						JOptionPane.showMessageDialog(mframe, "Game lost!");
						break;
					case WON:
						JOptionPane.showMessageDialog(mframe, "Game won!");
						scoreManager.addScore(evt);
				}
			}

			@Override
			public void onFlaggedTilesEvent(FlaggedTilesEvent evt) {
				lblRemainingMines
					.setText("Remaining Mines: " + (evt.getBoard().getMines() - evt.getFlagged()));
				mframe.pack();
			}
		});

		scoreManager = new ScoreManager();
		scoreManager.loadScores();
		timer.start();
	}

	private void createMenuBar() {
		var menubar = new JMenuBar();

		{
			var gameMenu = new JMenu("Game");

			var easyMenuItem = new JMenuItem("Easy");
			var mediumMenuItem = new JMenuItem("Medium");
			var hardMenuItem = new JMenuItem("Hard");
			var customMenuItem = new JMenuItem("Custom");

			gameMenu.setMnemonic(KeyEvent.VK_G);
			easyMenuItem.setMnemonic(KeyEvent.VK_E);
			mediumMenuItem.setMnemonic(KeyEvent.VK_M);
			hardMenuItem.setMnemonic(KeyEvent.VK_H);
			customMenuItem.setMnemonic(KeyEvent.VK_C);

			easyMenuItem.addActionListener((evt) -> initGame(EASY));
			mediumMenuItem.addActionListener((evt) -> initGame(MEDIUM));
			hardMenuItem.addActionListener((evt) -> initGame(HARD));
			customMenuItem.addActionListener((evt) -> {
				BoardConfig cfg = new CustomDialog(mframe).showDialog();
				if (cfg != null)
					initGame(cfg);
			});

			gameMenu.add(easyMenuItem);
			gameMenu.add(mediumMenuItem);
			gameMenu.add(hardMenuItem);
			gameMenu.addSeparator();
			gameMenu.add(customMenuItem);
			menubar.add(gameMenu);
		}
		{
			var highscoreMenu = new JMenu("Highscores");

			var easyMenuItem = new JMenuItem("Easy");
			var mediumMenuItem = new JMenuItem("Medium");
			var hardMenuItem = new JMenuItem("Hard");

			highscoreMenu.setMnemonic(KeyEvent.VK_H);
			easyMenuItem.setMnemonic(KeyEvent.VK_E);
			mediumMenuItem.setMnemonic(KeyEvent.VK_M);
			hardMenuItem.setMnemonic(KeyEvent.VK_H);

			easyMenuItem.addActionListener((evt) -> scoreManager.displayEasy());
			mediumMenuItem.addActionListener((evt) -> scoreManager.displayMedium());
			hardMenuItem.addActionListener((evt) -> scoreManager.displayHard());

			highscoreMenu.add(easyMenuItem);
			highscoreMenu.add(mediumMenuItem);
			highscoreMenu.add(hardMenuItem);
			menubar.add(highscoreMenu);
		}
		{
			var aboutMenuItem = new JMenuItem("About");

			aboutMenuItem.addActionListener(
				(evt) -> JOptionPane.showMessageDialog(board,
					"Minesweeper version " + VERSION + "\nby Kai S. K. Engelbart"
				)
			);

			menubar.add(aboutMenuItem);
		}
		mframe.setJMenuBar(menubar);
	}

	private void initGame(BoardConfig config) {
		board.init(config);
		gameTime = 0;
		timer.restart();
		mframe.pack();
	}
}