use crate::material::Material;
use crate::ray::*;
use crate::vec3::*;

#[derive(Clone)]
pub struct HitRecord<'a> {
    pub p: Point3,
    pub normal: Vec3,
    pub mat_ptr: &'a dyn Material,
    pub t: f64,
    pub front_face: bool,
}

impl HitRecord<'_> {
    pub fn new_empty<T: Material>(material: &'static T) -> Self {
        HitRecord { p: Point3::new(0.0, 0.0, 0.0), normal: Vec3::new(0.0, 0.0, 0.0), t: 0.0, front_face: false, mat_ptr: material  }
    }

    pub fn set_face_normal(&mut self, r: &Ray, outward_normal: Vec3) {
        self.front_face = r.direction().dot(&outward_normal) < 0.0;
        self.normal = if self.front_face {
            outward_normal
        } else {
            outward_normal * -1.0
        }
    }
}

pub trait Hittable {
    fn hit(&mut self, r: &Ray, t_min: f64, t_max: f64) -> Option<HitRecord>;
}