/*
Research Project:   Graphical Database for Category Theory
                    J. Bradbury, Dr. R. Rosebrugh, I. Rutherford
                    Mount Allison University 2001
																				Updated: May 8th, 2003 (J. Tweedle)
File:               SumFrame.java
Description:        This class implements a frame which allows the user to run
                    the category tool "Sum" on the current category.  The
                    algorithms used to test the category for sums were
                    removed and put into the file Sum.java
*/

//import statements
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.beans.*;

public class SumFrame extends JInternalFrame
{
	private CategoryInternalFrame categoryInternalFrame_;
	private Category cat = new Category();
	private Sum sum;
	private int obj;
	private String objchr;

//Objects in the Graphical User Interface(GUI)
	private JLabel objectLabel = new JLabel();
	private JLabel alphaLabel = new JLabel();
	private JLabel betaLabel = new JLabel();
	private JButton okButton = new JButton();
	private JButton sumButton = new JButton();
	//private JTextArea viewbox = new JTextArea("", 10, 15);
	private JComboBox objectChoice = new JComboBox();
	private JTextField alphaField = new JTextField(13);
	private JTextField betaField = new JTextField(13);
	//private JScrollPane areaScrollPane;

	public SumFrame(CategoryInternalFrame categoryInternalFrame)
	//Default Constructor with the parent frame as a parameter
	{
		super(categoryInternalFrame.getTitle() + ": Sum", true, true, false, false);
		categoryInternalFrame_ = categoryInternalFrame;
		cat.copyCategory(categoryInternalFrame_.getCategory());
		sum = new Sum(cat, "sum");

		okButton.setText("Close");
		objectLabel.setText("Object of Sum:");
		alphaLabel.setText("First injection:");
		betaLabel.setText("Second injection:");
		objectChoice.setBackground(Color.white);

/*		viewbox.setEditable(false);
		viewbox.setBackground(Color.white);
		viewbox.setLineWrap(true);
		viewbox.setWrapStyleWord(true);*/
		sumButton.setText("Sum?");
		alphaField.setBackground(Color.white);
		betaField.setBackground(Color.white);

		sumButton.addActionListener(new java.awt.event.ActionListener() {
			public void actionPerformed(ActionEvent e) {
				sumButton_actionPerformed(e);
			}
		});

		objectChoice.addItemListener(new java.awt.event.ItemListener() {
			public void itemStateChanged(ItemEvent e) {
				objectChoice_itemStateChanged(e);
			}
		});

		okButton.addActionListener(new java.awt.event.ActionListener() {
			public void actionPerformed(ActionEvent e) {
				okButton_actionPerformed(e);
			}
		});

/*		areaScrollPane = new JScrollPane(viewbox);
		areaScrollPane.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
		areaScrollPane.setBorder(BorderFactory.createEtchedBorder());*/

		Container contentPane = getContentPane();
		contentPane.setLayout(new GridBagLayout());
		contentPane.add(sumButton,	new GridBagConstraints(0, 3, 1, 1, 1.0, 1.0
		,GridBagConstraints.CENTER, GridBagConstraints.BOTH, new Insets(3, 3, 3, 3), 0, 0));
		contentPane.add(okButton,	new GridBagConstraints(1, 3, 1, 1, 1.0, 1.0
		,GridBagConstraints.CENTER, GridBagConstraints.BOTH, new Insets(3, 3, 3, 3), 0, 0));
		contentPane.add(alphaLabel,	new GridBagConstraints(0, 1, 1, 1, 1.0, 1.0
		,GridBagConstraints.CENTER, GridBagConstraints.BOTH, new Insets(3, 3, 3, 3), 0, 0));
		contentPane.add(betaLabel,	new GridBagConstraints(0, 2, 1, 1, 1.0, 1.0
		,GridBagConstraints.CENTER, GridBagConstraints.BOTH, new Insets(3, 3, 3, 3), 0, 0));
		contentPane.add(objectLabel,	new GridBagConstraints(0, 0, 1, 1, 1.0, 1.0
		,GridBagConstraints.CENTER, GridBagConstraints.BOTH, new Insets(3, 3, 3, 3), 0, 0));
		contentPane.add(objectChoice,	new GridBagConstraints(1, 0, 1, 1, 1.0, 1.0
		,GridBagConstraints.CENTER, GridBagConstraints.HORIZONTAL, new Insets(3, 3, 3, 3), 0, 0));
		contentPane.add(alphaField,	new GridBagConstraints(1, 1, 1, 1, 1.0, 1.0
		,GridBagConstraints.CENTER, GridBagConstraints.HORIZONTAL, new Insets(3, 3, 3, 3), 0, 0));
		contentPane.add(betaField,	new GridBagConstraints(1, 2, 1, 1, 1.0, 1.0
		,GridBagConstraints.CENTER, GridBagConstraints.HORIZONTAL, new Insets(3, 3, 3, 3), 0, 0));
		
		objectChoice.addItem("Check all objects");
		for (int i = 0; i < cat.num_objects; i++)
			objectChoice.addItem(cat.obj[i]);
		objectChoice.setSelectedIndex(1);
	}

	private void sumButton_actionPerformed(ActionEvent e)
	//Determine the sum of the current object given
	//an alpha and beta value
	{
		sum.setNumSums(0);
		sum.setOutput("");
		String viewbox = "";
		//viewbox.setText("");
		sum.setEndoPassed(false);
		objchr = (String)objectChoice.getSelectedItem();
		if (objchr.equals("Check all objects"))
		{
			if (!cat.check_obj(alphaField.getText()))
			{
				JOptionPane.showInternalMessageDialog(this, alphaField.getText() + " is not an object of " + cat.name + ".\n", "Error", JOptionPane.ERROR_MESSAGE);
				return;
			}
			else if (!cat.check_obj(betaField.getText()))
			{
				JOptionPane.showInternalMessageDialog(this, betaField.getText() + " is not an object of " + cat.name + ".\n", "Error", JOptionPane.ERROR_MESSAGE);
				return;
			}
			else
			{
				for (int i=0; i<cat.num_objects; i++)
				{
					objchr = (String)objectChoice.getItemAt(i+1);
					sum.sumAllObjects(alphaField.getText(), betaField.getText(), objchr);
				}
				if (sum.getNumSums() == 0)
				{
					JOptionPane.showInternalMessageDialog(this, "There is no sum of objects " + alphaField.getText() + " and " + betaField.getText() + ".", "No Sums Found", JOptionPane.ERROR_MESSAGE);
					return;
				}
				else if (sum.getNumSums() == 1)
					viewbox += sum.getOutput() + "1 sum was found.\n";
				else
					viewbox += sum.getOutput() + Integer.toString(sum.getNumSums()) + " sums were found.\n";
			}
		}
		else
		{
			int test = sum.sumOneObject(alphaField.getText(), betaField.getText(), objchr);
			int message_type = JOptionPane.PLAIN_MESSAGE;
			if (test == Sum.NOT_AN_OBJECT || test == Sum.INVALID_FIRST_DOMAIN
				|| test == Sum.INVALID_FIRST_PATH || test == Sum.INVALID_SECOND_DOMAIN
				|| test == Sum.INVALID_SECOND_PATH)
			{
				message_type = JOptionPane.ERROR_MESSAGE;
			}
			JOptionPane.showInternalMessageDialog(this, sum.getOutput(), "Sums", message_type);
			return;
		}
		
		if (sum.getEndoPassed())
			viewbox += "WARNING: Endomorpmism limit reached! Results may be inaccurate!\n";
//		else
//			viewbox += "\n";
//		viewbox.setCaretPosition(0);
		JOptionPane.showInternalMessageDialog(this, viewbox, "Sums", JOptionPane.PLAIN_MESSAGE);
	}

	private void okButton_actionPerformed(ActionEvent e)
	//Exit sum frame and return to main frame
	{
		try {this.setClosed(true);}
		catch (PropertyVetoException PVE) {}
	}

	private void objectChoice_itemStateChanged (ItemEvent e)
	{
		if (objectChoice.getSelectedItem().equals("Check all objects"))
		{
			alphaLabel.setText("First object:");
			betaLabel.setText("Second object:");
		}
		else
		{
			alphaLabel.setText("First injection:");
			betaLabel.setText("Second injection:");
		}
	}

}