package class7_3_RemoteControl_start2;

import java.awt.Color;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.FlowLayout;

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextField;

/**
 * The remote control unit which controls the world
 * @author hornick
 *
 */
public class ControlPanelUI extends JFrame {
	private ControlPanelListener eventListener; // UI event listener
	private Robot robot;
	private Car car;
	
	private JTextField result;
	
	public ControlPanelUI( Car car, Robot robot ) {
		this.robot = robot;
		this.car = car;

		// create the containing window and set its size etc
		setTitle("X10 Controller");
		setSize(200, 300);
		setLocation(400, 400);
		setResizable(false);
		setVisible(true);
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		eventListener = new ControlPanelListener();

		// Retrieves the window's contentPane and sets the background color
		Container contentPane = getContentPane();
		contentPane.setBackground(Color.BLACK);
		JPanel jp = new JPanel();
		FlowLayout fl = new FlowLayout();
		jp.setLayout(fl);
		contentPane.add(jp);

		// create the command buttons
		String[] commands = {"Clean", "Scrub", "Start", "Stop", "Undo"};
		for( String action: commands ) {
			JButton cb = new JButton(action);
			cb.setPreferredSize(new Dimension(150, 25));
			cb.setActionCommand(action);
			jp.add(cb);
			cb.addActionListener(eventListener);
		}
		
		result = new JTextField("");
		result.setPreferredSize(new Dimension(200, 25));
		jp.add(result);

		contentPane.validate();
		contentPane.repaint();
	}

	/**
	 * handle the invocation of various commands
	 * @param action String saying which action was performed.
	 */
	private void handleCommand( String action ) {
		boolean status = true;
		
		// determine what to do
		if( action.equals("Clean") ) {
			robot.tidy();
		}
		else if( action.equals("Scrub") ) {
			robot.scrub();
		}
		else if( action.equals("Start") ) {
			car.startEngine();
		}
		else if( action.equals("Stop") ) {
			car.stopEngine();
		}
		else { // undo button was pressed
			status = false;
		}
		if( status ) { // update the status of executing the commands
			result.setText("command OK");
		} else {
			result.setText("command failed");
		}
	}

	/**
	 * This is a nested inner class that handles events
	 * for the ControlPanel  
	 * @author hornick
	 */
	private class ControlPanelListener implements ActionListener {

		/**
		 * Constructor; does nothing useful
		 */ 
		private ControlPanelListener() {
		}

		/**
		 * ActionListener event handler for this class
		 * @param event - the ActionEvent object that caused the event
		 */
		public void actionPerformed(ActionEvent event) {

			String action = event.getActionCommand();
			handleCommand(action);
		}
	}	// end of ControlPanel inner class

}