/*
	Terabite.java

1	a. Why does ControlPanel require the parameter?
	b. What do the setLayout methods do, and why are the
		new GridLayout() calls different?
	c. Write a doc-comment, /** ... , above each class
		explaining its purpose.

2	Compile, run, and critique all the problems you see.
	List the top four problems below:
	i.
	ii.
	iii.
	iv.

3	Fix each of the four errors you identified in Q2.

4	Creating a local JPanel, put the "Place order" button
	inside of it, and add the panel to the ControlPanel.
	I.e., the button is in a panel is in a panel.
*/

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.util.TreeMap;

public class Terabite
{
	public static void main(String args[])
	{
		BusinessLogic bl = new BusinessLogic();
		ControlPanel gb = new ControlPanel(bl);	// Q1a

		JFrame jf = new JFrame("Tera-Bite Order Entry");
		jf.add(gb);
		jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		jf.setSize(400,400);
		jf.setVisible(true);
	}
}

//---------------------------------------------------------

class BusinessLogic
{
	String sandwichNames[] = {"Hamburg", "Cheeseburg", "1/4-pound", "1/2-pound","Side O' Beef"};
	double sandwichPrice[] = { 0.99,		1.09, 		1.19, 			1.49, 	2.99 };
	String sideNames[] = {"Fries", "Chips", "Gummy Bears"};
	double sidePrice[] = {  0.59,   0.89,	0.49 };
	String drinkNames[] = {"Cola", "Root Beer", "Coffee", "Milk", "Water"};
	double drinkPrice[] = { 0.99,	0.99,		1.29,		1.99,	0.49 };

	double computePrice(int sandwichIdx, int sideIdx,int drinkIdx, boolean superSz)
	{
		double p = (sandwichIdx<0? 0.00: sandwichPrice[sandwichIdx]);
		p += (sideIdx<0? 0.00: sidePrice[sideIdx]);
		p += (drinkIdx<0? 0.00: drinkPrice[drinkIdx]);
		return (superSz? 2*p: p);
	}
}


//---------------------------------------------------------

class ControlPanel extends JPanel
{
	JTextArea jta;
	ChoicesPanel choices;
	BusinessLogic bl;

	public ControlPanel(BusinessLogic bl)	// Q1a
	{
		this.bl =  bl;
		setBackground(Color.black);
		setLayout(new GridLayout(4,1, 3, 2)); // Q1b

		add( new LabelPanel() );
		choices = new ChoicesPanel(bl);
		add( choices );

		JButton order = new JButton("Place order");
		order.addActionListener( new OrderListener() );
		add(order);

		jta = new JTextArea(3,20); // row, col
		jta.setFont(new Font("Helvetica",Font.BOLD,16));
		jta.setText("Your total today is:");
		add( jta );
	}
	class OrderListener implements ActionListener
	{
		// Place order button has been pressed
		public void actionPerformed(ActionEvent e)
		{
			double total = bl.computePrice(
							choices.getSandwichChoice(),
							choices.getSideChoice(),
							choices.getDrinkChoice(),
							choices.getSuper() );
			jta.append("\n$ " + total );
		}
	}
}

//---------------------------------------------------------

class LabelPanel extends JPanel
{
	public LabelPanel()
	{
		JLabel title = new JLabel("Joe's Gigo BITES");
		title.setFont( new Font("Helvetica",Font.BOLD,36) );
		title.setForeground( Color.MAGENTA );
		add(title);
	}
}

//---------------------------------------------------------

class ChoicesPanel extends JPanel
{
 	JComboBox sandwiches, sides, drinks;
	JCheckBox superSize = new JCheckBox("Super Size?");
	String labelNames[] = {"Sandwiches","Drinks","Side Orders"};
	JLabel labels[];
  	Font myFont =	new Font("Helvetica",Font.BOLD,16);

	public ChoicesPanel(BusinessLogic bl)
	{
		sandwiches =	new JComboBox(bl.sandwichNames);
		sides = 		new JComboBox(bl.sideNames);
		drinks = 		new JComboBox(bl.drinkNames);

		labels = new JLabel[ labelNames.length ];
		for(int i=0; i<labels.length; i++)
		{
			labels[i] = new JLabel( labelNames[i] );
			labels[i].setFont(myFont);
			labels[i].setHorizontalAlignment(SwingConstants.RIGHT);
		}

		setLayout(new GridLayout(4,2) );	// Q1b

		// first row
		add(labels[0]);
		add(sandwiches);

		// second row
		add(labels[1]);
		add(drinks);

		// third row
		add(labels[2]);
		add(sides);

		// fourth row
		add(superSize);
	}
	// @return index of selected sandwich, -1 if none selected
	int getSandwichChoice() { return sandwiches.getSelectedIndex(); }
	int getSideChoice() { return sides.getSelectedIndex(); }
	int getDrinkChoice() { return drinks.getSelectedIndex(); }
	boolean getSuper() { return false; }
}