import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.text.DecimalFormat;

// The following are javadoc comments
// These MUST be placed just before the class declaration


public class RationalTester extends JFrame
{
	private Rational rat1 = new Rational();
	private Rational rat2 = new Rational();
	private Rational ratsResult;
	private String output = "";	
	String userDigits1 = "";
	String userDigits2 = "";
	int decimalPlaces1 = 0;
	int decimalPlaces2 = 0;
	
	DecimalFormat userSpecifiedDigitFormat1 = new DecimalFormat( userDigits1 ); 
	DecimalFormat userSpecifiedDigitFormat2 = new DecimalFormat( userDigits2 );
							
	private JTextField firstNumerField, firstDenomField, 
							secondNumerField, secondDenomField, 
							decimalPoints1Field, decimalPoints2Field;
	
	JTextArea outputArea;
	
	public RationalTester()
	{
		super( "Rational Tester" );
			
		Container container = getContentPane();
		
		outputArea = new JTextArea();
		
		// create panels
		JPanel topPanel = new JPanel();
		topPanel.setLayout( new GridLayout( 4, 4, 0, 3 ) );
		topPanel.setBackground( new Color( 150, 255, 150 ) );
		
		JPanel middlePanel = new JPanel();
		middlePanel.setLayout( new GridLayout( 3, 4, 3, 3 ) );
		middlePanel.setBackground( new Color( 150, 255, 150 ) );
					
		// create components for top panel and add them to top panel
		JLabel firstRatLabel = new JLabel( "     First Rational" );
		firstRatLabel.setFont( new Font( "Monospaced", Font.BOLD, 18 ) );
		JLabel blank1Label = new JLabel( "          " );
		
		JLabel secondRatLabel = new JLabel( "     Second Rational" );
		secondRatLabel.setFont( new Font( "Monospaced", Font.BOLD, 18 ) );
		JLabel blank2Label = new JLabel( "          " ); 
		
		JLabel blank3Label = new JLabel( "          " );
		JLabel blank4Label = new JLabel( "          " );
		
		JLabel firstNumerLabel = new JLabel( "     Numerator" );
		firstNumerLabel.setFont( new Font( "Monospaced", Font.BOLD, 16 ) );
		firstNumerField = new JTextField( 10 );
		
		firstNumerField.addActionListener
		(
			new ActionListener()	// anonymous inner class
			{
				// read value from user
				public void actionPerformed(  ActionEvent event )
				{ 
					rat1.setNumer( Integer.parseInt( firstNumerField.getText() ) );
				
				}
			
			} // end anonymous inner class
		
		); // end call to addActionListener
		
		JLabel firstDenomLabel = new JLabel( "     Denominator" );
		firstDenomLabel.setFont( new Font( "Monospaced", Font.BOLD, 16 ) );
		firstDenomField = new JTextField( 10 );
		
		firstDenomField.addActionListener
		(
			new ActionListener()	// anonymous inner class
			{
				// read value from user
				public void actionPerformed( ActionEvent event )
				{ 	
					if( rat1.denomIsNotZero() == true )
					{
						rat1.setDenom( Integer.parseInt( firstDenomField.getText() ) );
					}
					
				}
			
			} // end anonymous inner class
		
		); // end call to addActionListener
		
		JLabel secondNumerLabel = new JLabel( "     Numerator" );
		secondNumerLabel.setFont( new Font( "Monospaced", Font.BOLD, 16 ) );
		secondNumerField = new JTextField( 10 );
		
		secondNumerField.addActionListener
		(
			new ActionListener()	// anonymous inner class
			{
				// read value from user
				public void actionPerformed( ActionEvent event )
				{ 
					rat2.setNumer( Integer.parseInt( secondNumerField.getText() ) );
				
				}
			
			} // end anonymous inner class
		
		); // end call to addActionListener
		
		JLabel secondDenomLabel = new JLabel( "     Denominator" );
		secondDenomLabel.setFont( new Font( "Monospaced", Font.BOLD, 16 ) );
		secondDenomField = new JTextField( 10 );
		
		secondDenomField.addActionListener
		(
			new ActionListener()	// anonymous inner class
			{
				// read value from user
				public void actionPerformed( ActionEvent event )
				{ 
					if( rat2.denomIsNotZero() == true )
					{
						rat2.setDenom( Integer.parseInt( secondDenomField.getText() ) );
					}
								
				}
			
			} // end anonymous inner class
		
		); // end call to addActionListener
		
		JLabel decimalPoints1Label = new JLabel( "     Decimal Points" );
		decimalPoints1Label.setFont( new Font( "Monospaced", Font.BOLD, 16 ) );
		decimalPoints1Field = new JTextField( 10 );
		
		decimalPoints1Field.addActionListener
		(
			new ActionListener()	// anonymous inner class
			{
				// read value from user
				public void actionPerformed( ActionEvent event )
				{ 
				
					setDecimalPlaces1( decimalPoints1Field.getText() );
					
					String decimalPlaces1Array[] = new String[ decimalPlaces1 ];
					
					for( int counter = 0; counter < decimalPlaces1Array.length; counter++ )
					{
						decimalPlaces1Array[ counter ] = "0";
					}
					
					String decimalString1 = "";
					
					for( int counter = 0; counter < decimalPlaces1Array.length; counter++ )
					{
						decimalString1 += decimalPlaces1Array[ counter ];
					}
					
					userDigits1 = "." + decimalString1;
					
					setDecimalPlaces1( userDigits1 );
				}
			
			} // end anonymous inner class
		
		); // end call to addActionListener
		
		JLabel decimalPoints2Label = new JLabel( "     Decimal Points" );
		decimalPoints2Label.setFont( new Font( "Monospaced", Font.BOLD, 16 ) );
		decimalPoints2Field = new JTextField( 10 );
		
		decimalPoints2Field.addActionListener
		(
			new ActionListener()	// anonymous inner class
			{
				// read value from user
				public void actionPerformed( ActionEvent event )
				{ 
					
					setDecimalPlaces2( decimalPoints2Field.getText() );
					
					String decimalPlaces2Array[] = new String[ decimalPlaces2 ];
					
					for( int counter = 0; counter < decimalPlaces2Array.length; counter++ )
					{
						decimalPlaces2Array[ counter ] = "0";
					}
					
					String decimalString2 = "";
					
					for( int counter = 0; counter < decimalPlaces2Array.length; counter++ )
					{
						decimalString2 += decimalPlaces2Array[ counter ];
					}
					
					userDigits2 = "." + decimalString2;
								
				}
			
			} // end anonymous inner class
		
		); // end call to addActionListener
		
		topPanel.add( firstRatLabel );
		topPanel.add( blank1Label );
		topPanel.add( secondRatLabel );
		topPanel.add( blank2Label );
		
		topPanel.add( firstNumerLabel );
		topPanel.add( firstNumerField );
		topPanel.add( secondNumerLabel );
		topPanel.add( secondNumerField );
		
		topPanel.add( firstDenomLabel );
		topPanel.add( firstDenomField );
		
		topPanel.add( secondDenomLabel );
		topPanel.add( secondDenomField );
		
		topPanel.add( decimalPoints1Label );
		topPanel.add( decimalPoints1Field );
		
		topPanel.add( decimalPoints2Label );
		topPanel.add( decimalPoints2Field );		
			
		// create components for middle panel and add them to middle panel
		JButton addButton = new JButton( "Add Rationals" );
		addButton.setFont( new Font( "Monospaced", Font.BOLD, 18 ) );
		addButton.setForeground( Color.CYAN );
		addButton.setBackground( Color.BLACK );
		
		addButton.addActionListener
		(
			new ActionListener()	// anonymous inner class
			{
				// read value from user
				public void actionPerformed( ActionEvent event )
				{		
					if( ( rat1.denomIsNotZero() == true ) && ( rat2.denomIsNotZero() == true ) )
					{
									
						rat1.setNumer( Integer.parseInt( firstNumerField.getText() ) );
						rat1.setDenom( Integer.parseInt( firstDenomField.getText() ) );
						rat2.setNumer( Integer.parseInt( secondNumerField.getText() ) );
						rat2.setDenom( Integer.parseInt( secondDenomField.getText() ) );
				
						ratsResult = rat1.addRats( rat2 );
				
						displayResult( "  Sum:  " ); 
					}
					else
					{
						output += "The denominator cannot be zero.";
						displayOutput();
						reset();
					}
								   
				}
				
			} // end anonymous inner class
		
		); // end call to addActionListener
		
		JButton subtractButton = new JButton( "Subtract Rationals" );
		subtractButton.setFont( new Font( "Monospaced", Font.BOLD, 18 ) );
		subtractButton.setForeground( Color.MAGENTA );
		subtractButton.setBackground( Color.BLACK );
		
		subtractButton.addActionListener
		(
			new ActionListener()	// anonymous inner class
			{
				// read value from user
				public void actionPerformed( ActionEvent event )
				{ 
					rat1.setNumer( Integer.parseInt( firstNumerField.getText() ) );
					rat1.setDenom( Integer.parseInt( firstDenomField.getText() ) );
					rat2.setNumer( Integer.parseInt( secondNumerField.getText() ) );
					rat2.setDenom( Integer.parseInt( secondDenomField.getText() ) );
				
					ratsResult = rat1.subtractRats( rat2 );
				
					displayResult( "  Difference:  " );  
				}
			
			} // end anonymous inner class
		
		); // end call to addActionListener	
		
		JButton multiplyButton = new JButton( "Multiply Rationals" );
		multiplyButton.setFont( new Font( "Monospaced", Font.BOLD, 18 ) );
		multiplyButton.setForeground( Color.YELLOW );
		multiplyButton.setBackground( Color.BLACK );
		
		multiplyButton.addActionListener
		(
			new ActionListener()	// anonymous inner class
			{
				// read value from user
				public void actionPerformed( ActionEvent event )
				{ 
					rat1.setNumer( Integer.parseInt( firstNumerField.getText() ) );
					rat1.setDenom( Integer.parseInt( firstDenomField.getText() ) );
					rat2.setNumer( Integer.parseInt( secondNumerField.getText() ) );
					rat2.setDenom( Integer.parseInt( secondDenomField.getText() ) );
				
					ratsResult = rat1.multiplyRats( rat2 );
				
					displayResult( "  Product:  " );  
				}
			
			} // end anonymous inner class
		
		); // end call to addActionListener
		
		JButton divideButton = new JButton( "Divide Rationals" );
		divideButton.setFont( new Font( "Monospaced", Font.BOLD, 18 ) );
		divideButton.setForeground( Color.ORANGE );
		divideButton.setBackground( Color.BLACK );
		
		divideButton.addActionListener
		(
			new ActionListener()	// anonymous inner class
			{
				// read value from user
				public void actionPerformed( ActionEvent event )
				{ 
					rat1.setNumer( Integer.parseInt( firstNumerField.getText() ) );
					rat1.setDenom( Integer.parseInt( firstDenomField.getText() ) );
					rat2.setNumer( Integer.parseInt( secondNumerField.getText() ) );
					rat2.setDenom( Integer.parseInt( secondDenomField.getText() ) );
				
					ratsResult = rat1.divideRats( rat2 );
				
					displayResult( "  Quotient:  " ); 
				}
			
			} // end anonymous inner class
		
		); // end call to addActionListener	
		
		JButton clearButton = new JButton( "Clear" );
		clearButton.setFont( new Font( "Monospaced", Font.BOLD, 18 ) );
		clearButton.setForeground( Color.WHITE );
		clearButton.setBackground( Color.BLACK );
		clearButton.addActionListener
		(
			new ActionListener()	// anonymous inner class
			{
				// read value from user
				public void actionPerformed( ActionEvent event )
				{ 
					reset();
								
				}
			
			} // end anonymous inner class
		
		); // end call to addActionListener
		
		middlePanel.add( addButton );
		middlePanel.add( subtractButton );
		middlePanel.add( multiplyButton );
		middlePanel.add( divideButton );		
		middlePanel.add( outputArea );
		middlePanel.add( clearButton );
				
		Container myContainer = getContentPane();
		myContainer.setLayout( new BorderLayout() );
		myContainer.add( topPanel, BorderLayout.NORTH );
		myContainer.add( middlePanel, BorderLayout.CENTER );
		
		setSize( 900, 750 );
		setVisible( true );
		
		rat1 = new Rational();
		rat2 = new Rational();
		
		displayResult( "" );  
		
	}
	
	private void reset()
	{
		displayClear();
		rat1 = new Rational();
		rat2 = new Rational();
		displayResult( "" );
				
	}
	
	public void setDecimalPlaces1( String decimalValue1 )
	{
		userDigits1 = decimalValue1;
	}	
	
	public void setDecimalPlaces2( String decimalValue2 )
	{
		userDigits2 = decimalValue2;
	}
			
		
	private void displayResult( String operation )
	{	
		int numer1 = rat1.getNumer();
		int denom1 = rat1.getDenom();
		int numer2 = rat2.getNumer();
		int denom2 = rat2.getDenom();
		
		output += "\n  First Rational Fraction:  " + numer1 + " / " + denom1 + "     Decimal:  " + userSpecifiedDigitFormat1.format( rat1.toDouble() ) + "\n";
		
		output += "  Second Rational Fraction:  " + numer2 + " / " + denom2 + "     Decimal:  " + userSpecifiedDigitFormat2.format( rat2.toDouble() ) + "\n";
	
		if( operation.equals( "  Sum:  " ) || operation.equals( "  Difference:  " ) || 
						operation.equals( "  Product:  " ) || operation.equals( "  Quotient:  " ) )
		{
			output += operation +  ratsResult.toString() + "     Decimal:  " + ratsResult.toDouble() + "\n";
			
			/////////////////
			output += "uD1 " + userDigits1 + " " + "uD2 " + userDigits2; // to test for the values of decimal format
			/////////////////
		}	
		
		displayOutput();		
		
	}
	
	private void displayOutput()
	{
	
		outputArea.setText( output );
		
	}
	
	private void displayClear()
	{
	
		output = "";
		outputArea.setText( output );
		
	}	
			
	public static void main( String args[] )
	{
	
		RationalTester rt = new RationalTester();  
		
		rt.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
	
	}
}