use super::Hittable;
use super::Ray;
use super::HitRecord;

pub struct HittableList {
    objects: Vec<Box<dyn Hittable>>,
}

impl HittableList {
    pub fn new()-> Self {
        HittableList {
            objects: Vec::<Box<dyn Hittable>>::new()
        }
    }

    pub fn clear(&mut self) {
        self.objects.clear();
    }

    pub fn add(&mut self, obj: Box<dyn Hittable>) {
        self.objects.push(obj);
    }

    pub fn hit(&self, r: &Ray, t_min: f64, t_max: f64, rec: &mut HitRecord) -> bool {
        
        let mut hit_anything = false;
        let mut closest_so_far = t_max;

        for obj in &self.objects {
            let mut temp_rec = HitRecord::empty();
            if obj.hit(&r, t_min, closest_so_far, &mut temp_rec) {
                hit_anything = true;
                closest_so_far = temp_rec.t;
                *rec = temp_rec;
            }
        }

        return hit_anything;
    }
}