use crate::GameState;
use bevy::prelude::*;

pub fn plugin(app: &mut App) {
    app.init_resource::<GameTick>();

    app.add_systems(
        FixedLast,
        (|mut tick: ResMut<GameTick>| {
            tick.0 += 1;
        })
        .run_if(in_state(GameState::Playing)),
    );
}

#[derive(Default, Resource)]
pub struct GameTick(pub u64);