use argh::FromArgs;
use bevy::prelude::*;

#[derive(Debug, FromArgs, Resource)]
/// Toid Watching
pub struct Config {
    /// how many Toids to spawn
    #[argh(option, short = 't', default = "100")]
    pub toids: usize,
}

pub type Point = (f32, f32, f32);

pub type Toint = rstar::primitives::GeomWithData<Point, Entity>;

pub trait Pointable {
    fn to_point(&self) -> Point;
}

impl Pointable for Vec3 {
    fn to_point(&self) -> Point {
        (self.x, self.y, self.z)
    }
}

#[derive(Resource, Deref, DerefMut)]
pub struct Index(pub rstar::RTree<Toint>);

#[derive(Component, Debug, Clone, Deref, DerefMut, Default)]
pub struct Buddies(Vec<Entity>);

#[derive(Component, Debug, Clone, Deref, DerefMut, Default)]
pub struct Velocity(Vec3);

#[derive(Component)]
pub struct Toid;

pub fn turkey_time(commands: &mut Commands, scene: &Handle<Scene>) -> Entity {
    commands
        .spawn(SpatialBundle::default())
        .insert((Velocity::default(), Buddies::default(), Toid))
        .with_children(|t| {
            t.spawn(SceneBundle {
                scene: scene.to_owned(),
                ..Default::default()
            })
            .insert(Transform::from_rotation(Quat::from_axis_angle(
                Vec3::Y,
                -std::f32::consts::FRAC_PI_2,
            )));
        })
        .id()
}

pub fn add_gizmos(mut gizmos: Gizmos, toids: Query<(&Transform, Entity), With<Toid>>) {
    let gizmos = &mut gizmos;
    for (pos, _entity) in toids.iter() {
        let nudge = pos.up() * 0.15;
        let rpos = pos.translation + nudge;
        gizmos.ray(rpos, pos.forward(), Color::RED);
    }
}