use never::Never;
use orchid_base::interner::Interner;
use orchid_base::name::Sym;
use orchid_base::reqnot::Receipt;
use orchid_extension::atom::{AtomDynfo, AtomicFeatures};
use orchid_extension::entrypoint::ExtReq;
use orchid_extension::lexer::LexerObj;
use orchid_extension::other_system::SystemHandle;
use orchid_extension::parser::ParserObj;
use orchid_extension::system::{System, SystemCard};
use orchid_extension::system_ctor::SystemCtor;
use orchid_extension::tree::GenMember;

use crate::macros::instantiate_tpl::InstantiateTplCall;
use crate::macros::let_line::LetLine;
use crate::macros::macro_lib::gen_macro_lib;
use crate::macros::macro_line::{Macro, MacroLine};
use crate::macros::mactree_lexer::MacTreeLexer;
use crate::macros::recur_state::RecurState;
use crate::{MacTree, StdSystem};

#[derive(Default)]
pub struct MacroSystem;
impl SystemCtor for MacroSystem {
	type Deps = StdSystem;
	type Instance = Self;
	const NAME: &'static str = "macros";
	const VERSION: f64 = 0.00_01;
	fn inst(_: SystemHandle<StdSystem>) -> Self::Instance { Self }
}
impl SystemCard for MacroSystem {
	type Ctor = Self;
	type Req = Never;
	fn atoms() -> impl IntoIterator<Item = Option<Box<dyn AtomDynfo>>> {
		[
			Some(InstantiateTplCall::dynfo()),
			Some(MacTree::dynfo()),
			Some(RecurState::dynfo()),
			Some(Macro::dynfo()),
		]
	}
}
impl System for MacroSystem {
	async fn request(_: ExtReq<'_>, req: Self::Req) -> Receipt<'_> { match req {} }
	async fn prelude(_: &Interner) -> Vec<Sym> { vec![] }
	fn lexers() -> Vec<LexerObj> { vec![&MacTreeLexer] }
	fn parsers() -> Vec<ParserObj> { vec![&LetLine, &MacroLine] }
	fn env() -> Vec<GenMember> { gen_macro_lib() }
}