#     Copyright 2024, Kay Hayen, mailto:kay.hayen@gmail.com find license text at end of file


""" Attribute lookup nodes, generic one and base for generated ones.

See AttributeNodes otherwise.
"""

from .ChildrenHavingMixins import ChildHavingExpressionMixin
from .ExpressionBases import ExpressionBase
from .ExpressionBasesGenerated import ExpressionAttributeLookupBase


class ExpressionAttributeLookup(ExpressionAttributeLookupBase):
    """Looking up an attribute of an object.

    Typically code like: source.attribute_name
    """

    kind = "EXPRESSION_ATTRIBUTE_LOOKUP"

    named_children = ("expression",)
    node_attributes = ("attribute_name",)

    def getAttributeName(self):
        return self.attribute_name

    def computeExpression(self, trace_collection):
        return self.subnode_expression.computeExpressionAttribute(
            lookup_node=self,
            attribute_name=self.attribute_name,
            trace_collection=trace_collection,
        )

    def mayRaiseException(self, exception_type):
        return self.subnode_expression.mayRaiseException(
            exception_type
        ) or self.subnode_expression.mayRaiseExceptionAttributeLookup(
            exception_type=exception_type, attribute_name=self.attribute_name
        )

    @staticmethod
    def isKnownToBeIterable(count):
        # TODO: Could be known. We would need for computeExpressionAttribute to
        # either return a new node, or a decision maker.
        return None


class ExpressionAttributeLookupSpecial(ExpressionAttributeLookup):
    """Special lookup up an attribute of an object.

    Typically from code like this: with source: pass

    These directly go to slots, and are performed for with statements
    of Python2.7 or higher.
    """

    kind = "EXPRESSION_ATTRIBUTE_LOOKUP_SPECIAL"

    def computeExpression(self, trace_collection):
        return self.subnode_expression.computeExpressionAttributeSpecial(
            lookup_node=self,
            attribute_name=self.attribute_name,
            trace_collection=trace_collection,
        )


class ExpressionAttributeLookupFixedBase(ChildHavingExpressionMixin, ExpressionBase):
    """Looking up an attribute of an object.

    Typically code like: source.attribute_name
    """

    attribute_name = None

    named_children = ("expression",)

    def __init__(self, expression, source_ref):
        ChildHavingExpressionMixin.__init__(self, expression=expression)

        ExpressionBase.__init__(self, source_ref)

    def getAttributeName(self):
        return self.attribute_name

    @staticmethod
    def getDetails():
        return {}

    def computeExpression(self, trace_collection):
        return self.subnode_expression.computeExpressionAttribute(
            lookup_node=self,
            attribute_name=self.attribute_name,
            trace_collection=trace_collection,
        )

    def mayRaiseException(self, exception_type):
        return self.subnode_expression.mayRaiseException(
            exception_type
        ) or self.subnode_expression.mayRaiseExceptionAttributeLookup(
            exception_type=exception_type, attribute_name=self.attribute_name
        )

    @staticmethod
    def isKnownToBeIterable(count):
        # TODO: Could be known. We would need for computeExpressionAttribute to
        # either return a new node, or a decision maker.
        return None


#     Part of "Nuitka", an optimizing Python compiler that is compatible and
#     integrates with CPython, but also works on its own.
#
#     Licensed under the Apache License, Version 2.0 (the "License");
#     you may not use this file except in compliance with the License.
#     You may obtain a copy of the License at
#
#        http://www.apache.org/licenses/LICENSE-2.0
#
#     Unless required by applicable law or agreed to in writing, software
#     distributed under the License is distributed on an "AS IS" BASIS,
#     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#     See the License for the specific language governing permissions and
#     limitations under the License.
