import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
 
 
/**
 * @author Jenielle Gabriel
 *
 */
public class FFGen extends JFrame{
 
	private String FlipflopType = "";
	private boolean isOneFlipflop = true;
	private boolean isInput = false;
	private boolean isOutput = false;
 
	String JAEquation = "";
	String KAEquation = "";
	String JBEquation = "";
	String KBEquation = "";
	String OutputEquation = "";
 
	public void First(){
 
		/**
		 * @param args
		 */
		JLabel pleaseChooseFFType;
		String[] FlipflopTypes = {"JK", "RS", "D", "T"};; 
		JComboBox FlipflopList;
 
		JLabel pleaseChooseFFNum;
		ButtonGroup FlipflopNumberGroup;
		JRadioButtonMenuItem oneFlipflop;
		JRadioButtonMenuItem twoFlipflop;
 
		JLabel pleaseCheck;
		JCheckBox oneInput;
		JCheckBox oneOutput;
 
		JButton next;
 
		JFrame first;
		JPanel firstConLeft;
		JPanel firstConRight;
 
		FlipflopList = new JComboBox(FlipflopTypes);
		FlipflopList.addActionListener(
				new ActionListener(){
					public void actionPerformed(ActionEvent e){
						JComboBox cb = (JComboBox)e.getSource();
				        FlipflopType = (String)cb.getSelectedItem();
					}
				}
		);
 
		pleaseChooseFFType = new JLabel("Type of Flipflop:");
		oneFlipflop = new JRadioButtonMenuItem ("1");
		oneFlipflop.addActionListener(
				new ActionListener(){
					public void  actionPerformed(ActionEvent e){
						isOneFlipflop = true;
					}
				}
		);
		twoFlipflop = new JRadioButtonMenuItem ("2");
		twoFlipflop.addActionListener(
				new ActionListener(){
					public void  actionPerformed(ActionEvent e){
						isOneFlipflop = false;
					}
				}
		);
 
		pleaseChooseFFNum = new JLabel("Number of Flipflops:");
		FlipflopNumberGroup = new ButtonGroup();
		FlipflopNumberGroup.add(oneFlipflop);
		FlipflopNumberGroup.add(twoFlipflop);
 
		pleaseCheck = new JLabel("There is an:");
		oneInput = new JCheckBox ("Input");
		oneInput.addItemListener(
				new ItemListener(){
					public void itemStateChanged(ItemEvent e) {
						if (e.getStateChange() == ItemEvent.SELECTED)
							isInput = true;
						else if (e.getStateChange() == ItemEvent.DESELECTED)
					    	isInput = false;
					}
				}
		);
 
		oneOutput = new JCheckBox ("Output");
		oneOutput.addItemListener(
				new ItemListener(){
					public void itemStateChanged(ItemEvent e) {
						if (e.getStateChange() == ItemEvent.SELECTED)
							isOutput = true;
						else if (e.getStateChange() == ItemEvent.DESELECTED)
					    	isOutput = false;
					}
				}
		);
 
		next = new JButton ("Next");
		next.addActionListener(
				new ActionListener(){
					public void actionPerformed(ActionEvent e){
						if(FlipflopType == "JK")
							JK();
					}
				}
		);
 
		first =  new JFrame();
 
		firstConLeft = new JPanel();
		firstConRight = new JPanel();
		firstConRight.setLayout(new GridLayout(9,1,0,0));
		firstConRight.add(pleaseChooseFFType);
		firstConRight.add(FlipflopList);
		firstConRight.add(pleaseChooseFFNum);
		firstConRight.add(oneFlipflop);
		firstConRight.add(twoFlipflop);
		firstConRight.add(pleaseCheck);
		firstConRight.add(oneInput);
		firstConRight.add(oneOutput);
		firstConRight.add(next);
 
		JPanel Empty = new JPanel();
		Empty.setLayout(new GridLayout(1,2));
		Empty.add(firstConLeft);
		Empty.add(firstConRight);
		first.add(Empty);
 
		first.setSize(250,235);
		first.setVisible(true);
		//first.validate();
 
	}
 
	public void JK(){
 
		JFrame JKFrame = new JFrame();
 
		JButton A = new JButton("A");
		JButton B = new JButton("B");
		JButton x = new JButton("x");
		JButton open = new JButton ("(");
		JButton close = new JButton (")");
		JButton and = new JButton("*");
		JButton or =  new JButton("+");
 
		final JTextField JAEq = new JTextField();
		final JTextField KAEq = new JTextField();
		final JTextField JBEq = new JTextField();
		final JTextField KBEq = new JTextField();
		final JTextField OutputEq = new JTextField();
 
		JPanel JKLeftPanel = new JPanel();
		JPanel JKRightPanel = new JPanel();
		JKRightPanel.setLayout(new GridLayout(7,2));
		JKRightPanel.add(new JLabel("Enter the equations. "));
		JKRightPanel.add(new JLabel("Observe Proper Syntax."));
		JKRightPanel.add(new JLabel("JA = "));
		JKRightPanel.add(JAEq);
 
		JKRightPanel.add(new JLabel("JB = "));
		JKRightPanel.add(JBEq);
		JKRightPanel.add(new JLabel("KA = "));
		JKRightPanel.add(KAEq);
		JKRightPanel.add(new JLabel("KB = "));
		JKRightPanel.add(KBEq);
		JKRightPanel.add(new JLabel("x = "));
		JKRightPanel.add(OutputEq);
		JKRightPanel.add(new JLabel("Generate: "));
		JButton next = new JButton("next");
		JKRightPanel.add(next);
		next.addActionListener(
				new ActionListener(){
					public void actionPerformed(ActionEvent e)
					{
						JAEquation = JAEq.getText();
						JBEquation = JAEq.getText();
						KAEquation = KAEq.getText();
						KBEquation = KAEq.getText();
						OutputEquation = OutputEq.getText();
						genarateJK();
					}
				}
		);
 
		JKFrame.add(JKRightPanel);
		JKFrame.setSize(250,235);
		JKFrame.setVisible(true);
	}
 
	public void genarateJK(){
 
		JFrame JKTableFrame = new JFrame();
 
		int c = 0;
		int nextA[] = {0,0};  //Storage for next state A (has default values)
		int nextB[]= {0,0};  //Storage for next state B (has default values)
 
		int JA[] = {0,0}; //Storage for JA Values
		int JB[] = {0,0}; //Storage for JB Values
		int KA[] = {0,0}; //Storage for KA Values
		int KB[] = {0,0}; //Storage for KB Values
 
 
		if(isOneFlipflop && !isInput){ // one flipflop, no input, no output
			String[] A = {"1","0"}; 
			c = 2;
 
			for(int j=0; j<c; j++){
 
				//Complement of A
				String AComp = "";
				if(A[j] == "0")
					AComp = "1";
				else
					AComp = "0";
 
				//replace JA Formula with current value of A'
				String subsJA = replace(JAEquation,"A'",AComp);
				while(!subsJA.equals(replace(JAEquation,"A'",AComp))){
					subsJA = replace(JAEquation,"A",A[j]);
				}
 
				//replace JA Formula with current value of A
				subsJA = replace(JAEquation,"A",A[j]);
				while(!subsJA.equals(replace(JAEquation,"A",A[j]))){
					subsJA = replace(JAEquation,"A",A[j]);
				}
 
 
				//replace KA Formula with current value of A'
				String subsKA = replace(KAEquation,"A'",AComp);
				while(!subsKA.equals(replace(KAEquation,"A",AComp))){
					subsKA = replace(KAEquation,"A",A[j]);
				}
 
 
				//replace KA Formula with current value of A
				 subsKA = replace(KAEquation,"A",A[j]);
				while(!subsKA.equals(replace(KAEquation,"A",A[j]))){
					subsKA = replace(KAEquation,"A",A[j]);
				}
 
 
				try{
 
				Parser parser =  new Parser();
				//compute the value of JA
				int computedJAValue = (int)parser.evaluate(subsJA);
				JA[j] = computedJAValue;
 
				//compute the value of KA
				int computedKAValue = (int)parser.evaluate(subsKA);
				KA[j] = computedKAValue;
 
				}catch(Exception e){
					//testlang.setText(e.getMessage());
				}
 
				if(JA[j] == 0 && KA[j] == 0){
					nextA[j] = Integer.parseInt(A[j]);
				}
				else  if(JA[j] == 0 && KA[j] == 1){
					nextA[j] = 0;
				}
				else  if(JA[j] == 1 && KA[j] == 0){
					nextA[j] = 1;
				}
				else  if(JA[j] == 1 && KA[j] == 1){
					if(A[j] == "0")
						nextA[j] = 1;
					else if(A[j] == "1")
						nextA[j] = 0;
				}
 
			}//End for loop
 
 
 
 
 
			JKTableFrame.setLayout(new GridLayout(1,4));
			JKTableFrame.add(new JLabel("<html>Present<br>States<br>"+A[0]+"<br>"+A[1]));
			JKTableFrame.add(new JLabel("<html>JA<br><br>"+JA[0]+"<br>"+JA[1]));
			JKTableFrame.add(new JLabel(JAEquation));
			//JKTableFrame.add(new JLabel("<html>KA<br><br>"+KA[0]+"<br>"+KA[1]));
			JKTableFrame.add(new JLabel("<html>Next<br>States<br>"+nextA[0]+"<br>"+nextA[1]));
 
		}//End one flipflop, no input, no output
 
 
		JKTableFrame.setSize(250,235);
		JKTableFrame.setVisible(true);
 
	}
 
	static String replace(String str, String pattern, String replace) {
        int s = 0;
        int e = 0;
        StringBuffer result = new StringBuffer();
 
        while ((e = str.indexOf(pattern, s)) >= 0) {
            result.append(str.substring(s, e));
            result.append(replace);
            s = e+pattern.length();
        }
        result.append(str.substring(s));
        return result.toString();
    }
 
 
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		FFGen gui = new FFGen();
		gui.First();
		gui.repaint();
	}
 
}