package homework3;

import javax.swing.*;

import java.awt.*;

import java.awt.event.ActionListener;

import java.awt.event.ActionEvent;

import static java.lang.Integer.parseInt;

public class MathTutorGUI extends JFrame implements ActionListener {

private JTextField text; //where the user enters their answer

private JLabel label; //the label to display the math problem

private JLabel identifier; //"identifies" if correct or incorrect

private JButton mBtn; //button to check answer

private JPanel answerPanel; //container for identifier. Changes colors based on actions.

private MathRandomizer rand = new MathRandomizer(); //class for making random numbers

private static int counter = 0; //counter for keeping track of how many tries the user takes

public MathTutorGUI() {

super("Math Tutor");

setSize(300, 400);

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

text = new JTextField();

mBtn = new JButton("Click to start");

mBtn.addActionListener(this); //this is referring to the actionPerformed object of the class

label = new JLabel("Solve: ");

JPanel labelPanel = new JPanel();

labelPanel.setBackground(Color.GRAY);

answerPanel = new JPanel();

identifier = new JLabel("");

setLocationRelativeTo(null);

setLayout(new GridLayout(4, 1)); //grid of 4 rows and 1 cols

add(labelPanel);

add(text);

add(mBtn);

add(answerPanel);

answerPanel.add(identifier);

labelPanel.add(label);

}

public void actionPerformed(ActionEvent e) {

String actionCommand = e.getActionCommand();

if (actionCommand.equals("Click to start")) { //first operation will be plus when user clicks to start

rand.setfNum(rand.makeRandomNum());

rand.setsNum(rand.makeRandomNum());

mBtn.setText("Check Answer");

label.setText("Solve: " + rand.getfNum() + rand.operationChoice() + rand.getsNum());

} else if (actionCommand.equals("Check Answer")) { //TODO exception handle parseInt when sending empty string

try {

if (parseInt(text.getText()) == (rand.getsNum() + rand.getfNum()) && rand.getOperation().equals(" plus ")) {

identifier.setText("Correct! Tries: " + MathTutorGUI.counter);

rand.setfNum(rand.makeRandomNum());

rand.setsNum(rand.makeRandomNum());

label.setText("Solve: " + rand.getfNum() + rand.operationChoice() + rand.getsNum());

answerPanel.setBackground(Color.green);

text.setText("");

MathTutorGUI.counter = 0;

} else if (parseInt(text.getText()) == (rand.getfNum() - rand.getsNum())) {

identifier.setText("Correct! Tries: " + MathTutorGUI.counter);

rand.setfNum(rand.makeRandomNum());

rand.setsNum(rand.makeRandomNum());

label.setText("Solve: " + rand.getfNum() + rand.operationChoice() + rand.getsNum());

answerPanel.setBackground(Color.green);

text.setText("");

MathTutorGUI.counter = 0;

} else if (parseInt(text.getText()) == (rand.getfNum() * rand.getsNum())) {

identifier.setText("Correct! Tries: " + MathTutorGUI.counter);

rand.setfNum(rand.makeRandomNum());

rand.setsNum(rand.makeRandomNum());

label.setText("Solve: " + rand.getfNum() + rand.operationChoice() + rand.getsNum());

answerPanel.setBackground(Color.green);

text.setText("");

MathTutorGUI.counter = 0;

} else {

identifier.setText("Nope! Keep Trying! :)");

text.setText("");

answerPanel.setBackground(Color.red);

MathTutorGUI.counter++;

}

}

catch(NumberFormatException e1) //if user sends empty string, catch exception and tell them to try again

{

identifier.setText("Please type in your answer :)");

text.setText("");

answerPanel.setBackground(Color.magenta);

}

}

}

}