// Dit is een Swing applicatie met een ingebouwde filereader. Althans, dat is het idee.

import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
//import java.nio.file.FileSystem;
//import java.nio.file.FileSystems;
//import java.nio.file.Path;
//import java.nio.file.Paths;
import javax.swing.*;

public class GCApplet extends JFrame {
    private JPanel panel;
    private JButton browse_button;     private JButton read_button;
    private JTextField path_field; private JTextField info_field;    private JTextField polar_field;    private JTextField apolar_field;
    private JLabel title;    private JLabel file_label;    private JLabel info_label;    private JLabel percentage_label;

    public static void main(String[] args) {
        SwingUtilities.invokeLater(GCApplet::new);          //Schijnbaar volgens "PEP8"
//        SwingUtilities.invokeLater(new Runnable() {       //Verkeerd volgens "PEP8"
//            @Override
//            public void run() { new GCApplet(); }
//        });
    }

    public static class Polarity {
        final String[] POLAR = {"R", "N", "D", "C", "Q", "E", "H", "k", "S", "T", "Y" };
        final String[] APOLAR = {"A", "G", "I", "L", "M", "F", "P", "W", "V"};
    }

    private GCApplet() {
        JPanel panel = new JPanel();
        panel.setLayout(new GridBagLayout());
        GridBagConstraints gbc = new GridBagConstraints();
        gbc.fill = GridBagConstraints.HORIZONTAL;
        gbc.weightx = 1;
        gbc.insets = new Insets(5, 5, 5, 5);

        // laag 0: title
        gbc.gridx = 0; gbc.gridy = 0;
        JLabel title = new JLabel("this is an amino-acid ");
        panel.add(title, gbc);


        // laag 1: path + file buttons
        gbc.gridx = 0; gbc.gridy = 1;
        JLabel file_label = new JLabel("chosen file path:"); panel.add(file_label, gbc);
        gbc.gridx = 1; gbc.gridy = 1;
        path_field = new JTextField(); path_field.setPreferredSize(new Dimension(240, 24)); panel.add(path_field, gbc);
        gbc.gridx = 2; gbc.gridy = 1;
        JButton browse_button = new JButton("browse files");
        browse_button.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                System.out.println("let's browse!");
                path_field.setText("");
                selectFile();
            }
        });
        panel.add(browse_button, gbc);
        gbc.gridx = 3; gbc.gridy = 1;
        JButton analyse_button = new JButton("analyse file");
        panel.add(analyse_button, gbc);

        // laag 2: info + summary textfield
        gbc.gridx = 0; gbc.gridy = 2;
        JLabel info_label = new JLabel("total file info:"); panel.add(info_label, gbc);
        gbc.gridx = 1; gbc.gridy = 2; gbc.gridwidth = 3;
        JTextArea info_field = new JTextArea();
        info_field.setPreferredSize(new Dimension(180, 100));
        info_field.setLineWrap(true); info_field.setWrapStyleWord(true);
        panel.add(info_field, gbc);

        // laag 3 + 4: percentage uitdrukkingen
        gbc.gridx = 0; gbc.gridy = 3;
        JLabel perc_label = new JLabel("percentages:"); panel.add(perc_label, gbc);
        gbc.gridx = 1; gbc.gridy = 3; gbc.gridwidth = 2;
        JTextField polar_field = new JTextField(); polar_field.setPreferredSize(new Dimension(180, 24)); panel.add(polar_field, gbc);
        gbc.gridx = 1; gbc.gridy = 4; gbc.gridwidth = 2;
        JTextField apolar_field = new JTextField(); apolar_field.setPreferredSize(new Dimension(180, 24)); panel.add(apolar_field, gbc);

        // Frame aanmaken en panel met applicaties toevoegen aan frame.
        JFrame frame = new JFrame();
        frame.setTitle("Amino-acid analysis app");
        frame.add(panel); frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
        frame.pack(); frame.setVisible(true);

        System.out.println(" I just made this! proud :)");
    }

    private String selectFile() {
        System.out.println("Laat ik een file gaan openen");

        // Selecting file and getting filePath
        String filePath = "";
        JFileChooser fileChooser = new JFileChooser();
        int returnValue = fileChooser.showOpenDialog(null);
        if (returnValue == JFileChooser.APPROVE_OPTION) {
            File selectedFile = fileChooser.getSelectedFile();
            filePath = selectedFile.getPath();
            System.out.println(filePath);
            path_field.setText(selectedFile.getPath());
            path_field.setVisible(true);
        } else {
            System.out.println("nope, shit happened");}
        return filePath;
    }

    private String analyze_file() {
        String file_to_analyse = filePath;
        return "asdf";
    }

}