use orchid_extension::gen_expr::new_atom;
use orchid_extension::tree::{GenMember, fun, prefix};
use orchid_extension::{TAtom, exec};
use substack::Substack;

use crate::macros::lower::lower;
use crate::macros::mactree::MacTree;
use crate::macros::resolve::resolve;
use crate::macros::utils::{build_macro, mactree, mactreev};
use crate::{HomoTpl, UntypedTuple};

pub async fn gen_macro_lib() -> Vec<GenMember> {
	prefix("macros", [
		fun(true, "resolve", async |tpl: TAtom<MacTree>| {
			exec(async move |mut h| new_atom(resolve(&mut h, tpl.own().await).await)).await
		}),
		fun(true, "lower", async |mt: TAtom<MacTree>| lower(&mt.own().await, Substack::Bottom).await),
		prefix("common", [
			build_macro(None, ["..", "_", "="]).finish(),
			build_macro(Some(30), ["+"])
				.rule(
					mactreev!("...$" lhs 1 "macros::common::+" "...$" rhs 0),
					async |mut cx, [lhs, rhs]| {
						Ok(mactree!("std::ops::add::resolve"
              "push" cx.recur(lhs).await;
              "push" cx.recur(rhs).await;))
					},
				)
				.finish(),
			build_macro(Some(30), ["-"])
				.rule(
					mactreev!("...$" lhs 1 "macros::common::-" "...$" rhs 0),
					async |mut cx, [lhs, rhs]| {
						Ok(mactree!("std::ops::sub::resolve"
              "push" cx.recur(lhs).await;
              "push" cx.recur(rhs).await;))
					},
				)
				.finish(),
			build_macro(Some(20), ["*"])
				.rule(
					mactreev!("...$" lhs 1 "macros::common::*" "...$" rhs 0),
					async |mut cx, [lhs, rhs]| {
						Ok(mactree!("std::ops::mul::resolve"
              "push" cx.recur(lhs).await;
              "push" cx.recur(rhs).await;))
					},
				)
				.finish(),
			build_macro(Some(20), ["/"])
				.rule(
					mactreev!("...$" lhs 1 "macros::common::/" "...$" rhs 0),
					async |mut cx, [lhs, rhs]| {
						Ok(mactree!("std::ops::div::resolve"
              "push" cx.recur(lhs).await;
              "push" cx.recur(rhs).await;))
					},
				)
				.finish(),
			build_macro(Some(20), ["%"])
				.rule(
					mactreev!("...$" lhs 1 "macros::common::%" "...$" rhs 0),
					async |mut cx, [lhs, rhs]| {
						Ok(mactree!("std::ops::mod::resolve"
              "push" cx.recur(lhs).await;
              "push" cx.recur(rhs).await;))
					},
				)
				.finish(),
			build_macro(Some(10), ["."])
				.rule(
					mactreev!("...$" lhs 1 "macros::common::." "...$" rhs 0),
					async |mut cx, [lhs, rhs]| {
						Ok(mactree!("std::ops::get::resolve"
              "push" cx.recur(lhs).await;
              "push" cx.recur(rhs).await;))
					},
				)
				.finish(),
			build_macro(None, ["comma_list", ","])
				.rule(
					mactreev!("macros::common::comma_list" (
						"...$" head 0  "macros::common::," "...$" tail 1
					)),
					async |mut cx, [head, tail]| {
						let mut tail: HomoTpl<TAtom<MacTree>> =
							cx.recur_call(mactree!("macros::common::comma_list" "push" tail ;)).await?;
						tail.0.insert(0, cx.exec(new_atom(head)).await?);
						Ok(mactree!("Val" tail;))
					},
				)
				.rule(
					mactreev!("macros::common::comma_list" ( "...$" final_tail 0 )),
					async |_cx, [tail]| Ok(mactree!("Val" HomoTpl(vec![new_atom(tail)]);)),
				)
				.rule(mactreev!("macros::common::comma_list"()), async |_cx, []| {
					Ok(mactree!("Val" UntypedTuple(Vec::new());))
				})
				.finish(),
			build_macro(None, ["semi_list", ";"])
				.rule(
					mactreev!("macros::common::semi_list" (
						"...$" head 0  "macros::common::;" "...$" tail 1
					)),
					async |mut cx, [head, tail]| {
						let mut tail: HomoTpl<TAtom<MacTree>> =
							cx.recur_call(mactree!("macros::common::semi_list" "push" tail ;)).await?;
						tail.0.insert(0, cx.exec(new_atom(head)).await?);
						Ok(mactree!("Val" tail))
					},
				)
				.rule(
					mactreev!("macros::common::semi_list" ( "...$" final_tail 0 )),
					async |_cx, [tail]| Ok(mactree!("Val" HomoTpl(vec![new_atom(tail)]))),
				)
				.rule(mactreev!("macros::common::semi_list"()), async |_cx, []| {
					Ok(mactree!("Val" UntypedTuple(Vec::new())))
				})
				.finish(),
		]),
	])
}