import java.io.File;

import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;

public class ImageWindow extends JFrame {

    private ImageIcon[] images; 
    private int cursor;

    private JLabel label; 
    
    public ImageWindow() {
        this.setSize(1024, 1024);
        this.setLocationRelativeTo(null);
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        File resourcesDirectory = new File("../resources/");

        if(resourcesDirectory.exists() && resourcesDirectory.isDirectory()) {
            File[] files = resourcesDirectory.listFiles();

            if(files != null) {
                this.images = new ImageIcon[files.length];
                this.cursor = 0;

                for(File file : files) {
                    this.images[this.cursor] = new ImageIcon(file.getPath());
                    this.cursor++;
                }
            }
        }

        this.addMouseListener(new ClickSwapImageEvent(this));

        this.cursor = 0;

        this.nextImage();
    }

    public void nextImage() {
        if(this.images.length == 0) return;

        if(this.label != null) {
            this.remove(this.label);
        }

        this.label = new JLabel(this.images[cursor]);
        this.label.setVerticalAlignment(JLabel.CENTER);
        this.label.setHorizontalAlignment(JLabel.CENTER);

        if(this.cursor + 1 >= this.images.length) {
            this.cursor = 0;
        } else {
            this.cursor++;
        }

        System.out.println(this.cursor);

        this.add(label);
        this.revalidate();
    }

    public void lastImage() {
        if(this.images.length == 0) return;

        if(this.label != null) {
            this.remove(this.label);
        }

        this.label = new JLabel(this.images[cursor]);
        this.label.setVerticalAlignment(JLabel.CENTER);
        this.label.setHorizontalAlignment(JLabel.CENTER);

        if(this.cursor - 1 < 0) {
            this.cursor = this.images.length - 1;
        } else {
            this.cursor--;
        }

        System.out.println(this.cursor);

        this.add(label);
        this.revalidate();
    }
}