use raidillon_app::prelude::*;

/// renders aabb wireframes for all physics colliders
#[derive(Default)]
pub struct PhysicsDebugSystem;

impl System for PhysicsDebugSystem {
    fn frame_update(&mut self, res: &mut EngineResources, scene: &mut Scene) {
        let pctx = res.get::<PlatformContext>().expect("PlatformContext missing").clone();

        let mut debug_wireframes = pctx.debug_wireframes.borrow_mut();
        if !debug_wireframes.enabled {
            return;
        }

        let physics = match scene.resources.get::<Physics>() {
            Some(p) => p,
            None => return,
        };

        let color = [1.0, 0.0, 0.0, 1.0];

        for (_, collider) in physics.collider_set.iter() {
            let aabb = collider.compute_aabb();
            let min = aabb.mins;
            let max = aabb.maxs;

            debug_wireframes.add_box(
                [min.x, min.y, min.z],
                [max.x, max.y, max.z],
                color,
            );
        }
    }
}