#include "utils.hpp"

RGB::RGB(U8 r, U8 g, U8 b)
	: Red(r)
	, Green(g)
	, Blue(b)
{
}

Color::Color()
	: hue(0.0)
	, saturation(1.0)
	, value(1.0)
{
}

Color::Color(U32 val)
	: hue(0.0)
	, saturation(0.0)
{
	value = std::min((F64) val, 255.0);
}

Color::Color(F32 hue, F32 saturation, F32 value)
	: hue(hue)
	, saturation(saturation)
	, value(value)
{
}

fn Color::to_rgb() const noexcept -> RGB
{
	let chroma = saturation * value;
	let cube_hue = hue / 60.0;
	let tmp = chroma * (1.0 - fabs(fmod(cube_hue, 2.0) - 1.0));
	let match = value - chroma;

	var components = std::make_tuple(0.0, 0.0, 0.0);
	if (cube_hue < 1.0)
		components = { fma(chroma, match, 255.0), fma(tmp, match, 255.0), match * 255.0 };
	else if (cube_hue < 2.0)
		components = { fma(tmp, match, 255.0), fma(chroma, match, 255.0), match * 255.0 };
	else if(cube_hue < 3.0)
		components = { match * 255.0, fma(chroma, match, 255.0), fma(tmp, match, 255.0) };
	else if(cube_hue < 4.0)
		components = { match * 255.0, fma(tmp, match, 255.0), fma(chroma, match, 255.0) };
	else if(cube_hue < 5.0)
		components = { fma(tmp, match, 255.0), match * 255.0, fma(chroma, match, 255.0) };
	else
		components = { fma(chroma, match, 255.0), match * 255.0, fma(tmp, match, 255.0) };

	let c = RGB(round(fst(components)), round(snd(components)), round(thr(components)));

	return c;
}

fn Color::lerp(ref<const Color> rhs, double t) const noexcept -> Color
{
	return Color(std::lerp(hue, rhs.hue, t),
		     std::lerp(saturation, rhs.saturation, t),
		     std::lerp(value, rhs.value, t)
		    );
}

Point::Point(F64 x, F64 y)
	: x(x)
	, y(y)
{
}