#pragma once

#include "math.hpp"

namespace
Nimbin
{
struct Light {
    Vec3  sun_direction    { 0.3, -0.9, 0.2 };
    Vec3  sun_color        { 1.00, 0.95, 0.85 };
    Vec3  flashlight_pos   { 0.0, 0.0, 0.0 };
    Vec3  flashlight_dir   { 0.0, 0.0, -1.0 };
    Vec3  flashlight_color { 1.00, 0.95, 0.80 };
    Vec3  ambient          { 0.25, 0.27, 0.30 };

    float sun_intensity        { 0.0f }; // off for now
    float flashlight_range     { 40.0f };
    float flashlight_inner_cos { 0.85f };  // ≈ 32° full cone
    float flashlight_outer_cos { 0.50f };  // ≈ 60° cutoff
    float flashlight_intensity { 1.5f };

    Light() { normalize(); }

    void normalize() {
        double len = SDL_sqrt(sun_direction.x*sun_direction.x +
                              sun_direction.y*sun_direction.y +
                              sun_direction.z*sun_direction.z);
        if (len > 1e-6) sun_direction = sun_direction / len;

        len = SDL_sqrt(flashlight_dir.x*flashlight_dir.x +
                       flashlight_dir.y*flashlight_dir.y +
                       flashlight_dir.z*flashlight_dir.z);
        if (len > 1e-6) flashlight_dir = flashlight_dir / len;
    }
};

} // namespace Nimbin