use ecs::{Component, Sole};

use crate::color::Color;
use crate::util::builder;

builder! {
#[builder(name = PointLightBuilder, derives = (Debug, Clone))]
#[derive(Debug, Clone, Component)]
#[non_exhaustive]
pub struct PointLight
{
    pub diffuse: Color<f32>,
    pub specular: Color<f32>,
    pub attenuation_params: AttenuationParams,
}
}

impl PointLight
{
    pub fn builder() -> PointLightBuilder
    {
        PointLightBuilder::default()
    }
}

impl Default for PointLight
{
    fn default() -> Self
    {
        Self {
            diffuse: Color { red: 0.5, green: 0.5, blue: 0.5 },
            specular: Color { red: 1.0, green: 1.0, blue: 1.0 },
            attenuation_params: AttenuationParams::default(),
        }
    }
}

impl Default for PointLightBuilder
{
    fn default() -> Self
    {
        PointLight::default().into()
    }
}

/// Parameters for light [attenuation](https://en.wikipedia.org/wiki/Attenuation).
#[derive(Debug, Clone)]
pub struct AttenuationParams
{
    pub constant: f32,
    pub linear: f32,
    pub quadratic: f32,
}

impl Default for AttenuationParams
{
    fn default() -> Self
    {
        Self {
            constant: 1.0,
            linear: 0.0,
            quadratic: 0.0,
        }
    }
}

builder! {
/// Global light properties.
#[builder(name = GlobalLightBuilder, derives = (Debug, Clone, Default))]
#[derive(Debug, Clone, Default, Sole)]
#[non_exhaustive]
pub struct GlobalLight
{
    pub ambient: Color<f32>,
}
}

impl GlobalLight
{
    #[must_use]
    pub fn builder() -> GlobalLightBuilder
    {
        GlobalLightBuilder::default()
    }
}