use std::collections::{BTreeMap, HashMap};

use indexmap::IndexMap;

use super::Spanned;

#[derive(Debug, PartialEq, Eq)]
pub struct File<'src> {
    pub decls: IndexMap<Spanned<&'src str>, Spanned<Expr<'src>>>,
}

#[derive(Debug, PartialEq, Eq)]
pub enum Expr<'src> {
    Node(
        Spanned<&'src str>,
        Option<Spanned<IndexMap<Spanned<&'src str>, Expr<'src>>>>,
    ),
    SimplePipe(Box<Expr<'src>>, Box<Expr<'src>>),
    NamingPipe(
        Box<Expr<'src>>,
        (Vec<Spanned<&'src str>>, Vec<Spanned<&'src str>>),
        Box<Expr<'src>>,
    ),
    MappingPipe(Box<Expr<'src>>, Box<Expr<'src>>),
    NullPipe(Box<Expr<'src>>, Box<Expr<'src>>),
    MultiPipe(IndexMap<Spanned<&'src str>, Expr<'src>>),
    LetIn(
        IndexMap<Spanned<&'src str>, Box<Expr<'src>>>,
        Box<Expr<'src>>,
    ),
    // $
    Var(Spanned<&'src str>),
    // @
    InputVar(Spanned<&'src str>),
    AttrSet(Spanned<IndexMap<Spanned<&'src str>, Expr<'src>>>),
}