use rapier2d_f64::prelude::{RigidBodyHandle, RigidBodySet, ColliderBuilder, RigidBodyBuilder, ColliderSet};

use crate::SCALE;

pub struct Planet {
    pub body_handle: RigidBodyHandle,
    pub position: (f64, f64),
    pub radius: f64,
    pub mass: f64
}

pub struct Planets {
    pub planets: Vec<Planet>,
}

impl Planets {
    pub fn make_planet(planets: &mut Vec<Planet>, mass: f64, radius: f64, position: (f64, f64), rigid_body_set: &mut RigidBodySet, collider_set: &mut ColliderSet) {
        let collider = ColliderBuilder::ball(1000.0 / SCALE)
            .build();
        let body = RigidBodyBuilder::fixed()
            .additional_mass(0.0);
        let body_handle = rigid_body_set.insert(body);

        collider_set.insert_with_parent(collider, body_handle, rigid_body_set);

        planets.push(Planet {
            body_handle,
            position,
            radius,
            mass,
        });
    }

    pub fn new(rigid_body_set: &mut RigidBodySet, collider_set: &mut ColliderSet) -> Planets {
        let mut planets = Vec::new();
        
        let _earth = Planets::make_planet(
            &mut planets,
            2000.0,
            1000.0,
            (0.0, 0.0),
            rigid_body_set,
            collider_set,
        );

        Planets { planets }
    }
}