use carousel::{
    core::{
        Game, State,
        settings::{
            ClockSettings, DebugSettings, DrawSettings, PhysicsSettings, Settings, StageSettings,
            WindowSettings,
        },
    },
    draw::color::Color,
    stage::basic::{Position, Shape, ShapeKind},
};

struct MyGame {
    a: f32,
}

impl Game for MyGame {
    fn start(&mut self, ctxt: &mut carousel::core::ctxt::Ctxt) {
        let _ = ctxt
            .world
            .entity()
            .with(Position(360, 240))
            .with(Shape(ShapeKind::Circle(10.0), Color::GREEN))
            .spawn();
    }

    fn update(&mut self, ctxt: &mut carousel::core::ctxt::Ctxt) {
        let center_x = 360.0;
        let center_y = 240.0;
        let radius = 100.0;

        let x = center_x + self.a.cos() * radius;
        let y = center_y + self.a.sin() * radius;

        ctxt.world
            .query()
            .with::<Position>()
            .perform()
            .iter()
            .for_each(|e| {
                *ctxt.world.get_mut::<Position>(*e).unwrap() =
                    Position(x.round() as i32, y.round() as i32);
            });

        self.a += 0.05;
    }
}

fn main() {
    let game = MyGame { a: 0f32 };
    let mut state = State::new(
        game,
        Settings::new(
            ClockSettings::new(30.0),
            WindowSettings::new("Hello, world", 720, 480),
            StageSettings::new(DrawSettings::new(Color::WHITE)),
            PhysicsSettings::default(),
            DebugSettings,
        ),
    );
    state.start_game();
}