package HandGUI;

import java.awt.*; // older GUI library, has layout stuff for components
import java.awt.event.*; // events
import javax.swing.*; // swing is a library of GUI components

// example GUI 
// class extends JFrame, so it is its own window
public class BunnyGUI extends JFrame {

    // the bunny
    private Bunny mrBun;
    // input
    private JButton feedbutton;
    // output
    private JLabel display;

    // constructor does all setup of window and buttons
    public BunnyGUI() {
        // set up the window
        super("Your pet bunny");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setLayout(new FlowLayout());

        // make Bunny that shows messages to user with JOptionPanes
        mrBun = new Bunny();        
        mrBun.setGooey(true); // my Bunny class knows it might talk to a GUI

        // output text box
        display = new JLabel();
        
        // call our own method for updating the display
        updateDisplayBox(); // this is my method I made, not part of Java


        // button to feed the bunny
        feedbutton = new JButton("feed the bunny");
        // give it an actionListener that calls a method
        feedbutton.addActionListener(
                new ActionListener() {
                    public void actionPerformed(ActionEvent e) {
                    	bunnyFeed(); // call method from outer class
                    }
                }
        );

        // put the widgets in the window
        add(new JLabel("BUNNY ENRICHMENT:")); // only makes sense if I will never change this label
                                              // otherwise label should live in an instance variable
        add(feedbutton);
        add(display);

        // make the window visible
        pack();
        setVisible(true);
    }


    // feed the bunny
    // called by actionListener
    public void bunnyFeed() {
         // this also causes output by the bunny... it is annoying
         mrBun.feed((int) (Math.random() * 5) + 1);
         updateDisplayBox();
    }


    // need to update display in several places, so stick it in its own method
    public void updateDisplayBox() {
        display.setText(mrBun.getName() + " ate "
                + mrBun.getCarrotCount() + " carrots total.");
         // since this can change the width, re-pack to resize the window
         pack();
    }


    // main to launch the GUI
    public static void main(String[] args) {
        JOptionPane.showMessageDialog(
                                    null, // window to center over
                                    "Welcome to the Bunny Enrichment Center!", // output to show
                                    "Bunny Time!", // message box title
                                    JOptionPane.INFORMATION_MESSAGE);	// message box style
        BunnyGUI gui = new BunnyGUI();
    }
}