use std::fmt;

use crate::{map::Map, symbol::Symbol};

pub enum Val {
    Number(f64),
    Function {
        inputs: Vec<Symbol>,
        outputs: Vec<Symbol>,
        run: Box<dyn FnMut(Map<Val>) -> Val>,
    },
    Map(Map<Val>),
}

impl fmt::Debug for Val {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        match self {
            Self::Number(n) => write!(f, "{n:?}"),
            Self::Function {
                inputs, outputs, ..
            } => write!(f, "fn([{}], [{}]", inputs.join(" "), outputs.join(" ")),
            Self::Map(map) => write!(f, "{map:?}"),
        }
    }
}