from .. import TypeEnum, Environment, Arg, Builtin, evaluate, InterpretPanic, TypeWrap, MultiFunction
from ..structs import *

BOOLEAN = Environment()

def interpretEq(symbol, args, env, ns):
    # TODO this is a bit hacky
    if (isinstance(args[0], Type) or isinstance(args[0], TypeWrap)) and \
        (isinstance(args[1], Type) or isinstance(args[1], TypeWrap)):
        if f"{args[0]}" == f"{args[1]}":
            return Bool(True)
        else:
            return Bool(False)
    elif type(args[0]) != type(args[1]):
        return Bool(False)
    elif isinstance(args[0], Literal):
        if args[0].value == args[1].value:
            return Bool(True)
        else:
            return Bool(False)
    else:
        raise InterpretPanic(symbol, "unknown comparison type", args[0])

eq_arg = Arg("value", TypeEnum.ANY)
eq_func = Builtin("eq?", interpretEq, [eq_arg, eq_arg], return_type=Type(":bool"))
eq_multi = MultiFunction("eq?")
eq_multi.register(eq_func)
BOOLEAN.register("eq?", eq_multi)


def interpretNot(symbol, args, env, ns):
    return Bool(not args[0].value)

not_arg = Arg("not", TypeEnum.BOOL)
not_func = Builtin("not", interpretNot, [not_arg], return_type=Type(":bool"))
not_multi = MultiFunction("not")
not_multi.register(not_func)
BOOLEAN.register("not", not_multi)