use std::fmt::{Display, Formatter, Result};
use std::ops::{Add, Sub, AddAssign, SubAssign, Div, Mul, DivAssign, MulAssign};

use crate::metric::Unit;
use crate::metric::Primitive;

use crate::declare_unit_basics;

#[derive(Copy, Clone, PartialOrd, PartialEq)]
pub enum Volume {
    Base(f64, fn(f64) -> f64, &'static str),
    Canonical(f64),
    CubicMeter(f64),
    CubicMetre(f64),
    Litre(f64),
    Liter(f64)
}

impl Unit<Volume> for Volume {
    fn to_si_unit(&self) -> Volume {
        match self {
            Volume::Base(_, _, _) => self.clone(),
            Volume::Canonical(value) => Volume::Base(value.clone(), |x| x, "m³"),
            Volume::CubicMeter(value) => Volume::Base(value.clone(), |x| x, "m³"),
            Volume::CubicMetre(value) => Volume::Base(value.clone(), |x| x, "m³"),
            Volume::Litre(value) => Volume::Base(value / 1000.0, |x| x * 1000.0, "l"),
            Volume::Liter(value) => Volume::Base(value / 1000.0, |x| x * 1000.0, "l"),
        }
    }
}

declare_unit_basics!(Volume);