package Calculator;

import java.awt.Button;
import java.awt.Dialog;
import java.awt.FlowLayout;
import java.awt.Frame;
import java.awt.GridBagLayout;
import java.awt.GridLayout;
import java.awt.Label;
import java.awt.Panel;
import java.awt.TextField;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

public class MyFrame extends Frame {
    public MyFrame() {
        super("Calculator");
        addWindowListener(new WindowAdapter() {
            @Override
            public void windowClosing(WindowEvent e) {
                // TODO Auto-generated method stub
                System.exit(0);
            }
        });
        setVisible(true);
        setBounds(400, 400, 300, 200);
        TextField num1 = new TextField();
        Label addKey = new Label("+");
        TextField num2 = new TextField();
        Button equal2 = new Button("=");
        TextField goal = new TextField();
        setLayout(new FlowLayout());
        setResizable(false);
        add(num1);
        add(addKey);
        add(num2);
        add(equal2);
        add(goal);
        equal2.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                try {
                    goal.setText(add(Double.valueOf(num1.getText()), Double.valueOf(num2.getText())));
                    try {
                        goal.setText(add(Integer.valueOf(num1.getText()), Integer.valueOf(num2.getText())));
                    } catch (java.lang.NumberFormatException event) {
                        // TODO: handle exception
                    }
                } catch (java.lang.NumberFormatException event) {
                    // TODO: handle exception
                    CreateWarning(num1, num2, goal);
                }
            }
        });
    }

    public void CreateWarning(TextField num1, TextField num2, TextField goal) {
        Dialog warning = new Dialog(this, "warning!");
        warning.setLayout(new GridLayout(2, 1));
        warning.setSize(400, 200);
        warning.setVisible(true);
        warning.addWindowListener(new WindowAdapter() {
            @Override
            public void windowClosing(WindowEvent e) {
                // TODO Auto-generated method stub
                warning.dispose();
                num1.setText("");
                num2.setText("");
                goal.setText("");
            }
        });

        Panel Message = new Panel(new FlowLayout());
        Panel CloseButton = new Panel(new FlowLayout());

        Button closeButton = new Button("close");
        Label message = new Label("please enter a valid number!");

        closeButton.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                // TODO Auto-generated method stub
                warning.dispose();
                num1.setText("");
                num2.setText("");
                goal.setText("");
            }
        });

        Message.add(message);
        CloseButton.add(closeButton);
        warning.add(Message);
        warning.add(CloseButton);
    }

    public String add(double num1, double num2) {
        return String.valueOf(num1 + num2);
    }

    public String add(int num1, int num2) {
        return String.valueOf(num1 + num2);
    }
}