// UserInterface.java
// Description: User Interface for Terriers and Squirrels
// Author: Chris Wilcox
// Date: 4/28/2015

package myPackage;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.GridLayout;
import java.awt.Image;
import java.util.Timer;
import java.util.TimerTask;

import javax.swing.Box;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JSplitPane;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.border.Border;
import javax.swing.border.LineBorder;

public class UserInterface extends JFrame {

	private static final long serialVersionUID = 1L;

	// User interface
	private JPanel topPanel; // Points area
	private JPanel bottomPanel; // Game area
	private Image iconTerrier, iconSquirrel, iconMunch;
	private JLabel message;
	private JButton buttons[][];
	private Font font;
	private static Timer timer;

	// Game related
	private static String filename;
	private static GameEngine game;
	private static int counter = 0;
	private static int height;
	private static int width;
	private static char board[][];
	
	public UserInterface(int height, int width) {

		// Look and feel
		try {
			UIManager.setLookAndFeel(UIManager.getCrossPlatformLookAndFeelClassName());
		} catch (Exception e) {
			e.printStackTrace();
		}

		// Setup message
		font = new Font("Arial", Font.PLAIN, 24);
		message = new JLabel("");
		message.setFont(font);
		message.setForeground(new Color(0xFFFFFF));
		
		// Top panel for message
		topPanel = new JPanel();
		topPanel.add(message);
		topPanel.setBackground(new Color(0x0076A3));

		// Bottom panel for board
		bottomPanel = new JPanel();
		bottomPanel.setLayout(new GridLayout(height, width, 0, 0));
		add(Box.createRigidArea(new Dimension(0, 5)), BorderLayout.NORTH);
		add(bottomPanel, BorderLayout.CENTER);

		// Split panel
		JSplitPane sp = new JSplitPane(JSplitPane.VERTICAL_SPLIT);
		sp.setEnabled(false);
		sp.setDividerSize(0);
		sp.add(topPanel);
		sp.add(bottomPanel);
		add(sp, BorderLayout.CENTER);

		// Load images
		ImageIcon icon0 = new ImageIcon("iconTerrier.png");
		Image image0 = icon0.getImage();
		iconTerrier = image0.getScaledInstance(480/width, 480/width, Image.SCALE_DEFAULT);
		ImageIcon icon1 = new ImageIcon("iconSquirrel.png");
		Image image1 = icon1.getImage();
		iconSquirrel = image1.getScaledInstance(480/width, 480/width, Image.SCALE_DEFAULT);
		ImageIcon icon2 = new ImageIcon("iconMunch.png");
		Image image2 = icon2.getImage();
		iconMunch = image2.getScaledInstance(480/width, 480/width, Image.SCALE_DEFAULT);

		// Build panel of buttons
		buttons = new JButton[height][width];
		for (int row = 0; row < height; row++) {
			for (int col = 0; col < width; col++) {
				// Initialize and add button
				JButton button = new JButton();
				buttons[row][col] = button;
				Border border = new LineBorder(Color.black, 1);
				button.setOpaque(true);
				button.setBackground(new Color(0x006600));
				button.setBorder(border);
				button.setName(row+","+col);
				bottomPanel.add(button);
			}
		}

		// Window setup
		setSize(530, 530);
		setTitle("Terriers and Squirrels");
		setResizable(false);
		setLocationRelativeTo(null);
		setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
		setAlwaysOnTop(true);
	}
	
	public static void main(String[] args) {
		
		filename = args[0];
		SwingUtilities.invokeLater(new Runnable() {

			public void run() {

				// Instantiate user interface
				game = new GameEngine(filename);
				board = game.data();
				height = board.length;
				width = board[0].length;
				UserInterface ui = new UserInterface(height, width);
				ui.setVisible(true);
				ui.redrawBoard();
				timer = new Timer();
				timer.schedule(ui.new RedrawTask(), 1000, 1000); // every 1.0 seconds
			}
		});
	}

	public void redrawBoard() {
		
		// Update Generation
		message.setText("Terriers and Squirrels, Move: " + counter++);

		// Redraw board
		for (int i = 0; i < board.length; i++) {
			for (int j = 0; j < board[0].length; j++) {
				switch (board[i][j]) {
				case 'T':
					buttons[i][j].setIcon(new ImageIcon(iconTerrier));
					break;
				case 'S':
					buttons[i][j].setIcon(new ImageIcon(iconSquirrel));
					break;
				case 'A':
					buttons[i][j].setIcon(new ImageIcon(iconMunch));
					board[i][j] = 'T'; // make it a terrier again
					break;
				default:
					buttons[i][j].setIcon(null);
				}
			}
		}
	}

	// Scheduled task to redraw screen
	class RedrawTask extends TimerTask {
		public void run() {

			// Advance game
			boolean done = game.next();

			// Redraw board
			redrawBoard();
			
			// Stop timer, if done
			if (done) timer.cancel();
		}
	}
}