use winit::event::{Event, WindowEvent};
use winit::event_loop::EventLoop;
use winit::window::Window;

fn main2(evl: EventLoop<()>) {
    let mut window = None;

    evl.run(move |event, elwt, flow| {
        match event {
            Event::Resumed => {
                // Application is active; create a window.
                window = Some(Window::new(elwt).unwrap());
            },

            Event::Suspended => {
                // Application is inactive; destroy the window.
                window = None;
            },

            Event::WindowEvent { event, .. } => match event {
                WindowEvent::CloseRequested => {
                    // Window is closed; exit the application.
                    flow.set_exit();
                },

                WindowEvent::Resized(size) => {
                    println!("{:?}", size);
                }

                _ => {},
            },

            _ => {},
        }
    });
}

fn main() {
#   return;
    let evl = EventLoop::new();
    main2(evl);
}

use async_winit::event_loop::EventLoop;
use async_winit::window::Window;
use futures_lite::prelude::*;

fn main2(evl: EventLoop) {
    let window_target = evl.window_target().clone();

    evl.block_on(async move {
        loop {
            // Wait for the application to be active.
            window_target.resumed().await;

            // Create a window.
            let window = Window::new().await.unwrap();

            // Print the size of the window when it is resized.
            let print_size = async {
                window
                    .resized()
                    .wait_many()
                    .for_each(|size| {
                        println!("{:?}", size);
                    })
                    .await;

                true
            };

            // Wait until the window is closed.
            let close = async {
                window.close_requested().wait_once().await;
                println!("Close");
                true
            };

            // Wait until the application is suspended.
            let suspend = async {
                window_target.suspended().wait_once().await;
                false
            };

            // Run all of these at once.
            let needs_exit = print_size.or(close).or(suspend).await;

            // If we need to exit, exit. Otherwise, loop again, destroying the window.
            if needs_exit {
                window_target.exit().await;
            } else {
                drop(window);
            }
        }
    });
}

fn main() {
#   return;
    let evl = EventLoop::new();
    main2(evl);
}