fn main() -> Result<()> {
    // Window prefs allow the size and position of the window to be saved and restored
    let window_prefs = WindowPreferences::new("com", "example", "app", 1)?;
    // Options contains scaling, UPS, etc
    let options = Options::default();
    // The switcher is how new scenes are created
    let switcher: SceneSwitcher<SceneResult, SceneName> =
        |style, scene_stack, new_scene| match new_scene {
            SceneName::Example => scene_stack.push(ExampleScene::new()),
        };
    let first_scene = ExampleScene::new();
    run_scenes(
        300,
        300,
        "Scenes Example",
        Some(window_prefs),
        switcher,
        first_scene,
        options,
        empty_pre_post()
    )?;
    Ok(())
}

// The scene name is the id used so the switcher knows which one to create
#[derive(Clone, Debug, PartialEq)]
enum SceneName {
    Example,
}

// After a scene is finished it can return values to it's parent using scene result
#[derive(Clone, Debug, PartialEq)]
enum SceneResult {}

struct ExampleScene {}

impl ExampleScene {
    pub fn new() -> Box<Self> {
        Box::new(Self {})
    }
}

impl Scene<SceneResult, SceneName> for ExampleScene {
    fn render(
        &mut self,
        graphics: &mut Graphics,
        mouse_xy: Coord,
        held_keys: &[KeyCode]) {
        todo!()
    }

    fn update(
        &mut self,
        timing: &Timing,
        mouse_xy: Coord,
        held_keys: &[KeyCode],
    ) -> SceneUpdateResult<SceneResult, SceneName> {
        todo!()
    }
}

struct Example {}

fn main() -> Result<()> {
    let system = Box::new(Example {});
    run(240, 160, "Example", Box::new(system), Options::default())?;
    Ok(())
}

//Check `src/scenes.rs` for examples of implementing held keys, etc
impl System for Example {
    fn update(&mut self, timing: &Timing) {}
    fn render(&mut self, graphics: &mut Graphics) {}
}