from typing import *
from agast import *

class TypecheckResult:
	def __init__(self, pd: str):
		self.parser_data = pd


def typecheck(program: List[Decl]) -> TypecheckResult:
	i = 0
	def gen(name: str = "") -> str:
		return f"__ag{i:03}{name}"

	# collect a list of name -> iface declarations
	ifaces: Dict[str, Decl] = dict(
		map(lambda c: (c.name, c),
		filter(lambda c: isinstance(c, Iface),
			program)))
	print(ifaces)

	# a high-level dictionary of productions; this has sub-productions
	# that should be further expanded at a later step before converting
	# into lark code
	productions_hi: Dict[str, Union[str, List[str]]] = dict()

	for node in filter(lambda c: isinstance(c, Node), program):
		print(node)

	return TypecheckResult("")