/**
 *
 * @Sam Amirtahmasebi
 * @v0.3
 *
 */

import java.io.File;
import java.io.FileNotFoundException;
import java.io.PrintStream;
import java.util.Scanner;
import static javax.swing.JOptionPane.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public class Valutakalkulator extends JFrame implements ActionListener
{
    private JTextField txtNOK, txtAnnen;
    private JLabel label;

    public Valutakalkulator()
    {
        super("VALUTAKALKULATOR");
        JPanel pnlTop = new JPanel();
        pnlTop.setLayout(new GridLayout(1, 4));

        pnlTop.add(new JLabel("NOK"));
        txtNOK = new JTextField();
        pnlTop.add(txtNOK);

        label = new JLabel("Annen valuta");
        pnlTop.add(label);
        txtAnnen = new JTextField();
        pnlTop.add(txtAnnen);

        JPanel pnlCenter = new JPanel();
        pnlCenter.setLayout(new GridLayout(2, 2));

        JPanel pnlBottom = new JPanel();
        pnlBottom.setLayout(new GridLayout(1, 4));

        JButton btnRemoveNOK = new JButton("Fjern NOK");
        JButton btnRemoveCurrency = new JButton("Fjern annen valuta");
        JButton btnRemoveBoth = new JButton("Fjern begge");
        JButton btnExit = new JButton("Avslutt");

        JButton btnGBP = new JButton("GBP");
        JButton btnEUR = new JButton("EUR");
        JButton btnUSD = new JButton("USD");
        JButton btnSEK = new JButton("SEK");

        pnlCenter.add(btnGBP);
        pnlCenter.add(btnEUR);
        pnlCenter.add(btnUSD);
        pnlCenter.add(btnSEK);

        pnlBottom.add(btnRemoveNOK);
        pnlBottom.add(btnRemoveCurrency);
        pnlBottom.add(btnRemoveBoth);
        pnlBottom.add(btnExit);

        btnRemoveNOK.addActionListener(new ActionListener()
            {
                public void actionPerformed(ActionEvent e)
                {
                    txtNOK.setText("");
                }
            });

        btnRemoveCurrency.addActionListener(new ActionListener()
            {
                public void actionPerformed(ActionEvent e)
                {
                    txtAnnen.setText("");
                    label.setText("Annen valuta");
                }
            });

        btnRemoveBoth.addActionListener(new ActionListener()
            {
                public void actionPerformed(ActionEvent e)
                {
                    txtNOK.setText("");
                    txtAnnen.setText("");
                }
            });

        btnExit.addActionListener(new ActionListener()
            {
                public void actionPerformed(ActionEvent e)
                {
                    System.exit(0);
                }
            });

        btnGBP.addActionListener(this);
        btnEUR.addActionListener(this);
        btnUSD.addActionListener(this);
        btnSEK.addActionListener(this);

        add(pnlTop, BorderLayout.NORTH);
        add(pnlBottom, BorderLayout.SOUTH);
        add(pnlCenter, BorderLayout.CENTER);

        setSize(600, 135);
        setVisible(true);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }

    public void actionPerformed(ActionEvent event)
    {
        JButton clicked = (JButton) event.getSource();

        String strNOK = txtNOK.getText();
        String strAnnen = txtAnnen.getText();
        double result;

        if (txtNOK.getText().length() == 0 && txtAnnen.getText().length() == 0)
        {
            showMessageDialog(this, "Du må skrive ett beløp!");
        }
        else if (txtNOK.getText().length() > 0 && txtAnnen.getText().length() > 0)
        {
            showMessageDialog(this, "Du må skrive bare ett beløp!");
        }
        else if (txtNOK.getText().length() > 0 && txtAnnen.getText().length() <= 0)
        {
            double norsk = Double.parseDouble(strNOK);

            if (event.getActionCommand().equals("GBP"))
            {
                result = norsk / 10.96;
                txtAnnen.setText("" + result);
                label.setText("GBP");
            }
            else if (event.getActionCommand().equals("EUR"))
            {
                result = norsk / 9.31;
                txtAnnen.setText("" + result);
                label.setText("EUR");
            }
            else if (event.getActionCommand().equals("USD"))
            {
                result = norsk / 8.55;
                txtAnnen.setText("" + result);
                label.setText("USD");
            }
            else if (event.getActionCommand().equals("SEK"))
            {
                result = norsk / 0.97;
                txtAnnen.setText("" + result);
                label.setText("SEK");
            }
        }
        else if (txtNOK.getText().length() <= 0 && txtAnnen.getText().length() > 0)
        {
            double valuta = Double.parseDouble(strAnnen);

            if (event.getActionCommand().equals("GBP"))
            {
                result = valuta * 10.96;
                txtNOK.setText("" + result);
                label.setText("GBP");
            }
            else if (event.getActionCommand().equals("EUR"))
            {
                result = valuta * 9.31;
                txtNOK.setText("" + result);
                label.setText("EUR");
            }
            else if (event.getActionCommand().equals("USD"))
            {
                result = valuta * 8.55;
                txtNOK.setText("" + result);
                label.setText("USD");
            }
            else if (event.getActionCommand().equals("SEK"))
            {
                result = valuta * 0.97;
                txtNOK.setText("" + result);
                label.setText("SEK");
            }
        }
    }
}