use gtk::prelude::*;
use gtk::{Application, ApplicationWindow, Box, Button, Label};

fn main() {
    let app = Application::new(Some("com.example.gtk-app"), Default::default()) ;

    app.connect_activate(|app| {
        let window = ApplicationWindow::new(app);
        window.set_title("Counter App");
        window.set_default_size(400, 300);

        let vbox = Box::new(gtk::Orientation::Vertical, 10);
        window.add(&vbox);

        let label = Label::new(Some("0"));
        vbox.add(&label);

        let hbox = Box::new(gtk::Orientation::Horizontal, 10);
        vbox.add(&hbox);

        let decrement_button = Button::with_label("-");
        let label_clone = label.clone();
        decrement_button.connect_clicked(move |_| {
            let value: i32 = label_clone.text().parse().unwrap_or(0);
            label_clone.set_text(&(value - 1).to_string());
        });
        hbox.add(&decrement_button);

        let increment_button = Button::with_label("+");
        let label_clone = label.clone();
        increment_button.connect_clicked(move |_| {
            let value: i32 = label_clone.text().parse().unwrap_or(0);
            label_clone.set_text(&(value + 1).to_string());
        });
        hbox.add(&increment_button);

        window.show_all();
    });

    app.run();
}