use crate::*;
use EdnItem::*;

pub struct EdnKeymap(pub Vec<EdnItem<String>>);

impl EdnKeymap {
    pub fn command <C, D: Command<C>, E: EdnCommand<C>, I: EdnInput> (&self, state: &C, input: &I) -> Option<E> {
        for item in self.0.iter() {
            if let Exp(items) = item {
                match items.as_slice() {
                    [Sym(a), b, c @ ..] => if input.matches(a.as_str()) {
                        return Some(E::from_edn(state, &b.to_ref(), c))
                    },
                    _ => unreachable!()
                }
            } else {
                unreachable!()
            }
        }
        None
    }
}