fn main() {
    let root = "D:\\P\\RealityWorld\\app_data";

    // there should be a process or operation let user to select one or more Dna to start
    // here we start a special Dna
    let dna_root = "D:\\P\\RealityWorld\\app_data\\dna\\dna1.json".to_owned();
    let dna = load_dna(&dna_root.to_string()).unwrap();

    let (user_sender, app_receiver) = mpsc::channel::<Message>();
    let (app_sender, user_receiver) = mpsc::channel::<Message>();

    let mut app = Box::<RealityApp>::default();
    app.init(
        root.to_string(),
        &dna.agents,
        move || {
            let mut message: Option<Message> = None;
            match user_receiver.try_recv() {
                Ok(msg) => {
                    println!("{}: {}", msg.sender, msg.content.to_string());
                    message = Some(msg);
                }
                Err(e) => {}
            }

            message
        },
        move |msg| {
            user_sender.send(msg).unwrap();
        },
    );

    // game thread
    thread::spawn(move || loop {
        App::new(root).start_dna(&dna.clone()).run(
            || {
                let mut message: Option<Message> = None;
                match app_receiver.try_recv() {
                    Ok(msg) => {
                        println!("{}: {}", msg.sender, msg.content.to_string());
                        message = Some(msg);
                    }
                    Err(e) => {}
                }

                message
            },
            |msg| {
                app_sender.send(msg).unwrap();
            },
        );
    });

    let options = eframe::NativeOptions {
        initial_window_size: Some(egui::vec2(900.0, 600.0)),
        ..Default::default()
    };
    eframe::run_native("Reality World", options, Box::new(|_cc| app))
        .expect("Failed to run native example");
}