import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ItemListener;
import java.awt.event.ItemEvent;
import java.awt.event.*;
import javax.swing.JOptionPane;
import javax.swing.*;

/**
 * The class <b>GameController</b> is the controller of the game. It is a
 * listener of the view, and has a method <b>play</b> which computes the next
 * step of the game, and updates model and view.
 *
 * @author Simon Paquette
 */
public class GameController implements ActionListener, ItemListener {

    /**
     * the board model that represent the actual game
     */
    private GameModel model;

    /**
     * the graphical view that represent the actual game
     */
    private GameView view;

    /**
     * Constructor used for initializing the controller. It creates the game's view
     * and the game's model instances
     *
     * @param width  the width of the board on which the game will be played
     * @param height the height of the board on which the game will be played
     */
    public GameController(int width, int height) {
        model = new GameModel(width, height);
        view = new GameView(model, this);
        update();
    }

    /**
     * Callback used when the user clicks a button (reset, random or quit)
     *
     * @param e the ActionEvent
     */
    public void actionPerformed(ActionEvent e) {

        String action = e.getActionCommand();

        if (action.equals("click")) {
            GridButton button = (GridButton) e.getSource();
            model.click(button.getColumn(), button.getRow());
        }
        if (action.equals("Reset")) {
            view.setShowSolution(false);
            model.reset();
        }
        if (action.equals("Random")) {
            view.setShowSolution(false);
            model.randomize();
        }
        if (action.equals("Quit")) {
            System.exit(0);
        }
        if (action.equals("Play Again")) {
            JOptionPane.getRootFrame().dispose();
            view.setShowSolution(false);
            model.reset();
        }
        update();

        if (model.isFinished()) {
            JButton quit = new JButton("Quit");
            quit.addActionListener(this);
            JButton playAgain = new JButton("Play Again");
            playAgain.addActionListener(this);
            Object[] options = { quit, playAgain };

            JOptionPane.showOptionDialog(null,
                    "Congratulations, you won in " + model.getNumberOfSteps()
                            + " steps!\nWould you like to play again?",
                    "Won", JOptionPane.DEFAULT_OPTION, JOptionPane.INFORMATION_MESSAGE, null, options, options[1]);
        }
    }

    /**
     * Callback used when the user select/unselects a checkbox
     *
     * @param e the ItemEvent
     */
    public void itemStateChanged(ItemEvent e) {

        if (e.getStateChange() == ItemEvent.SELECTED) {
            view.setShowSolution(true);
        }
        if (e.getStateChange() == ItemEvent.DESELECTED) {
            view.setShowSolution(false);
        }
        update();
    }

    /**
     * updates the status of the board's instances based on the current game model,
     * then redraws the view
     */
    public void update() {
        view.update();
    }

}