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

from bu4.encoding.codes import CODE_DLYD
from bu4.evaluation.constructs.eattachable import EAttachable
from bu4.evaluation.constructs.edelayed import EDelayed
from bu4.evaluation.constructs.evaluable import Evaluable
from bu4.indexing.constructs.indexed import Indexed
from bu4.indexing.evaluation.eivtype import eivtype
from bu4.transform.states.aftertransform import AfterTransform
from bu4.transform.states.transformfinished import TransformFinished
from bu4.transform.states.transformstart import TransformStart
from bu4.transform.states.transformstate import TransformState
from bu4.transform.targets.atlambda import ATLambda

__all__ = ('IDelayed',)


class IDelayed(Indexed):
    def __init__(self, value: Indexed):
        self.value = value

    def attach(self, ev: eivtype) -> Evaluable:
        return EDelayed(EAttachable(
            ev,
            self.value
        ))

    def __str__(self):
        return f'&{self.value}'

    def bytes(self) -> TransformState[bytes]:
        return AfterTransform(
            TransformStart(lambda: self.value.bytes()),
            ATLambda(
                lambda value: TransformFinished(bytes([CODE_DLYD, *value]))
            )
        )