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use super::*;

// HSL -> RGB
impl From<HslColor> for RgbColor {
    fn from(hsl: HslColor) -> RgbColor {
        match Result::<RgbColor, ColorError>::from(hsl) {
            Ok(rgb) => rgb,
            Err(err) => panic!("Converting HslColor to RgbColor failed: {}", err),
        }
    }
}
impl From<HslColor> for Result<RgbColor, ColorError> {
    fn from(hsl: HslColor) -> Result<RgbColor, ColorError> {
        let HslColor {
            hue,
            saturation,
            lightness,
        } = hsl;
        let c = (1. - ((2. * (lightness as f64 / 100.)) - 1.).abs()) * (saturation as f64 / 100.);
        let x = c * (1. - ((((hue as f64) / 60.) % 2.) - 1.).abs());
        let m = (lightness as f64 / 100.) - (c / 2.);

        let (r_prime, g_prime, b_prime) = {
            if (0. ..60.).contains(&hue) {
                (c, x, 0.)
            } else if (60. ..120.).contains(&hue) {
                (x, c, 0.)
            } else if (120. ..180.).contains(&hue) {
                (0., c, x)
            } else if (180. ..240.).contains(&hue) {
                (0., x, c)
            } else if (240. ..300.).contains(&hue) {
                (x, 0., c)
            } else if (300. ..360.).contains(&hue) {
                (c, 0., x)
            } else {
                return Err(ColorError::DegreeOverflow);
            }
        };
        Ok(RgbColor {
            red: ((r_prime + m) * 255.).round() as u8,
            green: ((g_prime + m) * 255.).round() as u8,
            blue: ((b_prime + m) * 255.).round() as u8,
        })
    }
}

//noinspection DuplicatedCode
#[cfg(test)]
mod test {
    use super::*;
    //use math::round;

    #[test]
    fn to_rgb() {
        test_utils::test_to_rgb_conversion(test_utils::RGB_HSL.iter())
    }
}