use futures::FutureExt;
use itertools::Itertools;
use orchid_base::{NameLike, VPath, fmt};
use orchid_host::tree::{MemKind, Mod, RootData};

pub async fn print_mod(module: &Mod, path: VPath, root: &RootData) {
	let indent = "  ".repeat(path.len());
	for (key, tgt) in &module.imports {
		match tgt {
			Ok(tgt) => println!("{indent}import {key} => {}", tgt.target),
			Err(opts) => println!(
				"{indent}import {key} conflicts between {}",
				opts.iter().map(|i| &i.target).join(" ")
			),
		}
	}
	for (key, mem) in &module.members {
		let new_path = path.clone().name_with_suffix(key.clone()).to_sym().await;
		match mem.kind(root.ctx.clone(), &root.consts).await {
			MemKind::Module(module) => {
				println!("{indent}module {key} {{");
				print_mod(module, VPath::new(new_path.segs()), root).boxed_local().await;
				println!("{indent}}}")
			},
			MemKind::Const => {
				let value = root.consts.get(&new_path).expect("Missing const!");
				println!("{indent}const {key} = {}", fmt(value).await)
			},
		}
	}
}