#[derive(Debug, Eq, PartialEq)]
pub struct Colour {
    pub red: u8,
    pub green: u8,
    pub blue: u8,
}

impl From<String> for Colour {
    #[inline]
    fn from(string: String) -> Colour {
        let values: Vec<&str> = string.split(',').collect();

        let red: u8 = values[0].parse().unwrap_or(0);
        let green: u8 = values[1].parse().unwrap_or(0);
        let blue: u8 = values[2].parse().unwrap_or(0);

        Colour { red, green, blue }
    }
}

impl ToString for Colour {
    #[inline]
    fn to_string(&self) -> String {
        format!("{},{},{}", self.red, self.green, self.blue)
    }
}

#[cfg(test)]
mod test {
    use crate::colour::Colour;

    #[test]
    fn test_colour_from_string() {
        assert_eq!(
            Colour::from("0,255,0".to_string()),
            Colour { red: 0, green: 255, blue: 0 }
        );
    }

    #[test]
    fn test_colour_to_string() {
        assert_eq!(Colour { red: 22, green: 33, blue: 44, }.to_string(), "22,33,44".to_string());
    }
}