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extern crate glutin;
extern crate gl;



#[cfg(test)]
mod tests {
    #[test]
    fn it_works() {
        super::test_fn();
        assert_eq!(2 + 2, 4);
    }
}

pub fn info() {
    glutin::EventsLoop::new();
    println!("rug2d: test version sucessfully executed.")
}

pub fn test_fn() {
    use glutin::GlContext;
    let mut events_loop = glutin::EventsLoop::new();
    let window = glutin::WindowBuilder::new()
        .with_title("Hello, world!")
        .with_dimensions(1024, 768);
    let context = glutin::ContextBuilder::new()
        .with_vsync(true);
    let gl_window = glutin::GlWindow::new(window, context, &events_loop).unwrap();

    unsafe {
        gl_window.make_current().unwrap();
    }

    unsafe {
        gl::load_with(|symbol| gl_window.get_proc_address(symbol) as *const _);
        gl::ClearColor(0.0, 1.0, 0.0, 1.0);
    }

    let mut running = true;
    while running {
        events_loop.poll_events(|event| {
            match event {
                glutin::Event::WindowEvent{ event, .. } => match event {
                    glutin::WindowEvent::Closed => running = false,
                    glutin::WindowEvent::Resized(w, h) => gl_window.resize(w, h),
                    _ => ()
                },
                _ => ()
            }
        });

        unsafe {
            gl::Clear(gl::COLOR_BUFFER_BIT);
        }

        gl_window.swap_buffers().unwrap();
    }
}