use bevy::prelude::*;

#[derive(Component)]
struct Rotator;

fn main() {
    App::new()
        .add_plugins(DefaultPlugins)
        .add_systems(Startup, setup)
        .add_systems(Update, rotate)
        .run();
}

fn setup(mut commands: Commands, asset_server: Res<AssetServer>) {
    commands.spawn(Camera3dBundle {
        transform: Transform::from_xyz(-2.5, 4.5, 9.0).looking_at(Vec3::ZERO, Vec3::Y),
        ..default()
    });

    commands.spawn(PointLightBundle {
        point_light: PointLight {
            shadows_enabled: true,
            ..default()
        },
        transform: Transform::from_xyz(4.0, 8.0, 4.0),
        ..default()
    });

    for x in -1..2 {
        for y in -1..2 {
            commands.spawn((
                SceneBundle {
                    scene: asset_server.load("test-cube.glb#Scene0"),
                    transform: Transform::from_xyz((x * 3) as f32, 0.0, (y * 3) as f32),
                    ..default()
                },
                Rotator,
            ));
        }
    }
}

fn rotate(mut query: Query<&mut Transform, With<Rotator>>, time: Res<Time>) {
    for mut transform in &mut query {
        transform.rotate_y(time.delta_seconds() / 2.);
    }
}