use crate::prelude::*;

pub(crate) struct Display3dPlugin;

impl Plugin for Display3dPlugin {
    fn build(&self, app: &mut App) {
        app.add_systems(
            Startup,
            (initialize_camera, load_models).run_if(in_state(GameState::Loading)),
        )
        .add_systems(
            Update,
            (
                initialize_board.run_if(resource_added::<ModelMap>()),
                menu::exit_to_menu.run_if(in_state(GameState::Display3d)),
            ),
        )
        .add_systems(OnEnter(GameState::Display3d), activate);
    }
}

#[derive(Debug, Component)]
struct Board3d;

#[derive(Debug, Resource)]
struct ModelMap;

fn initialize_camera(mut commands: Commands) {
    commands.spawn((
        Camera3dBundle {
            camera: Camera {
                is_active: false,
                ..default()
            },
            ..default()
        },
        UiCameraConfig { show_ui: true },
    ));
}

fn load_models(server: Res<AssetServer>, mut commands: Commands) {
    warn!("TODO: Load models");

    commands.insert_resource(ModelMap);
}

fn initialize_board(mut commands: Commands, model_map: Option<Res<ModelMap>>) {
    if let Some(models) = model_map {
        warn!("TODO: Intialize 3D Board!");

        commands.spawn((
            SpatialBundle {
                visibility: Visibility::Hidden,
                ..default()
            },
            Board3d,
        ));
    }
}

fn activate(
    mut cameras: Query<&mut Camera, With<Camera3d>>,
    mut boards: Query<&mut Visibility, With<Board3d>>,
) {
    cameras.iter_mut().for_each(|mut camera| {
        camera.is_active = true;
    });
    boards.iter_mut().for_each(|mut visibility| {
        *visibility = Visibility::Visible;
    });
}