#  Copyright (c) PARRRATE T&V 2021. All rights reserved.

__all__ = ('PLambda',)

from bu4.linking.constructs.llambda import LLambda
from bu4.linking.states.afterlinking import AfterLinking
from bu4.linking.states.linkingfinished import LinkingFinished
from bu4.linking.states.linkingparsed import LinkingParsed
from bu4.linking.states.linkingstate import LinkingState
from bu4.linking.targets.allambda import ALLambda
from bu4.parsing.constructs.parsed import Parsed


class PLambda(Parsed):
    def __init__(self, name: bytes, value: Parsed):
        self.name = name
        self.value = value

    def link(self, promise: set[bytes]) -> LinkingState:
        assert self.name not in promise, f'overloaded: {self.name}'
        return AfterLinking(
            LinkingParsed(
                promise | {self.name},
                self.value
            ),
            ALLambda(
                lambda value: LinkingFinished(LLambda(
                    self.name,
                    value
                ))
            )
        )