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

from bu4.evaluation.av.evtype import evtype
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.parsing.codes import CODE_DLYD
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: evtype) -> 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]))
            )
        )