use bevy::prelude::*;
use bevy_dolly::prelude::*;
use bevy_inspector_egui::quick::WorldInspectorPlugin;

fn main() {
    App::new()
        .add_plugins((DefaultPlugins, DollyPosCtrl))
        .add_plugins(WorldInspectorPlugin::new())
        .add_systems(Startup, setup)
        .add_systems(Update, (Dolly::<MainCamera>::update_active, update_camera))
        .run();
}

#[derive(Component)]
struct MainCamera;

fn setup(
    mut commands: Commands,
    mut meshes: ResMut<Assets<Mesh>>,
    mut materials: ResMut<Assets<StandardMaterial>>,
) {
    // plane
    commands.spawn(PbrBundle {
        mesh: meshes.add(Plane3d::default().mesh().size(20., 20.)),
        material: materials.add(Color::srgb(0.3, 0.5, 0.3)),
        ..default()
    });

    Transform::from_translation(Vec3::new(0., 0., 2.));

    commands.spawn((
        MainCamera,
        Rig::builder()
            .with(Position::new(Vec3::Y * 3.0))
            .with(LookAt::new(Vec3::new(0., -2., 2.)))
            .build(),
        Camera3dBundle {
            transform: Transform::from_xyz(-2.0, 2., 5.0)
                .looking_at(Vec3::new(0., 0., 0.), Vec3::Y),
            ..default()
        },
    ));

    info!("Use W, A, S, D for movement");
    info!("Use Space and Shift for going up and down");
    info!("Use , (Comma) and . (Period) to rotate Left or Right");
    // light
    commands.spawn(PointLightBundle {
        transform: Transform::from_xyz(4.0, 8.0, 4.0),
        ..default()
    });
}

#[allow(clippy::type_complexity)]
fn update_camera(
    mut query: ParamSet<(
        Query<&mut Transform, With<DollyPosCtrlMove>>,
        Query<&mut Rig>,
    )>,
) {
    let mut p0 = query.p0();
    let player = p0.single_mut();
    query.p1().single_mut().driver_mut::<LookAt>().target = player.translation;
}