"""Support for simplified access to data on nodes of type omni.graph.nodes.ExtractAttribute

Copies a single attribute from an input bundle to an output attribute directly on the node if it exists in the input bundle
and matches the type of the output attribute
"""

from typing import Any

import carb
import omni.graph.core as og
import omni.graph.core._omni_graph_core as _og
import omni.graph.tools.ogn as ogn



class OgnExtractAttrDatabase(og.Database):
    """Helper class providing simplified access to data on nodes of type omni.graph.nodes.ExtractAttribute

    Class Members:
        node: Node being evaluated

    Attribute Value Properties:
        Inputs:
            inputs.attrName
            inputs.data
        Outputs:
            outputs.output
    """

    # Imprint the generator and target ABI versions in the file for JIT generation
    GENERATOR_VERSION = (1, 41, 3)
    TARGET_VERSION = (2, 139, 12)

    # This is an internal object that provides per-class storage of a per-node data dictionary
    PER_NODE_DATA = {}

    # This is an internal object that describes unchanging attributes in a generic way
    # The values in this list are in no particular order, as a per-attribute tuple
    #     Name, Type, ExtendedTypeIndex, UiName, Description, Metadata,
    #     Is_Required, DefaultValue, Is_Deprecated, DeprecationMsg
    # You should not need to access any of this data directly, use the defined database interfaces
    INTERFACE = og.Database._get_interface([
        ('inputs:attrName', 'token', 0, 'Attribute To Extract', 'Name of the attribute to look for in the bundle', {ogn.MetadataKeys.DEFAULT: '"points"'}, True, "points", False, ''),
        ('inputs:data', 'bundle', 0, 'Bundle For Extraction', 'Collection of attributes from which the named attribute is to be extracted', {}, True, None, False, ''),
        ('outputs:output', 'any', 2, 'Extracted Attribute', 'The single attribute extracted from the input bundle', {}, True, None, False, ''),
    ])

    @classmethod
    def _populate_role_data(cls):
        """Populate a role structure with the non-default roles on this node type"""
        role_data = super()._populate_role_data()
        role_data.inputs.data = og.AttributeRole.BUNDLE
        return role_data

    class ValuesForInputs(og.DynamicAttributeAccess):
        LOCAL_PROPERTY_NAMES = { }
        """Helper class that creates natural hierarchical access to input attributes"""
        def __init__(self, node: og.Node, attributes, dynamic_attributes: og.DynamicAttributeInterface):
            """Initialize simplified access for the attribute data"""
            context = node.get_graph().get_default_graph_context()
            super().__init__(context, node, attributes, dynamic_attributes)
            self.__bundles = og.BundleContainer(context, node, attributes, [], read_only=True, gpu_ptr_kinds={})
            self._batchedReadAttributes = []
            self._batchedReadValues = []

        @property
        def attrName(self):
            data_view = og.AttributeValueHelper(self._attributes.attrName)
            return data_view.get()

        @attrName.setter
        def attrName(self, value):
            if self._setting_locked:
                raise og.ReadOnlyError(self._attributes.attrName)
            data_view = og.AttributeValueHelper(self._attributes.attrName)
            data_view.set(value)

        @property
        def data(self) -> og.BundleContents:
            """Get the bundle wrapper class for the attribute inputs.data"""
            return self.__bundles.data

        def _prefetch(self):
            readAttributes = self._batchedReadAttributes
            newValues = _og._prefetch_input_attributes_data(readAttributes)
            if len(readAttributes) == len(newValues):
                self._batchedReadValues = newValues

    class ValuesForOutputs(og.DynamicAttributeAccess):
        LOCAL_PROPERTY_NAMES = { }
        """Helper class that creates natural hierarchical access to output attributes"""
        def __init__(self, node: og.Node, attributes, dynamic_attributes: og.DynamicAttributeInterface):
            """Initialize simplified access for the attribute data"""
            context = node.get_graph().get_default_graph_context()
            super().__init__(context, node, attributes, dynamic_attributes)
            self._batchedWriteValues = { }

        @property
        def output(self) -> og.RuntimeAttribute:
            """Get the runtime wrapper class for the attribute outputs.output"""
            return og.RuntimeAttribute(self._attributes.output.get_attribute_data(), self._context, False)

        @output.setter
        def output(self, value_to_set: Any):
            """Assign another attribute's value to outputs.output"""
            if isinstance(value_to_set, og.RuntimeAttribute):
                self.output.value = value_to_set.value
            else:
                self.output.value = value_to_set

        def _commit(self):
            _og._commit_output_attributes_data(self._batchedWriteValues)
            self._batchedWriteValues = { }

    class ValuesForState(og.DynamicAttributeAccess):
        """Helper class that creates natural hierarchical access to state attributes"""
        def __init__(self, node: og.Node, attributes, dynamic_attributes: og.DynamicAttributeInterface):
            """Initialize simplified access for the attribute data"""
            context = node.get_graph().get_default_graph_context()
            super().__init__(context, node, attributes, dynamic_attributes)

    def __init__(self, node):
        super().__init__(node)
        dynamic_attributes = self.dynamic_attribute_data(node, og.AttributePortType.ATTRIBUTE_PORT_TYPE_INPUT)
        self.inputs = OgnExtractAttrDatabase.ValuesForInputs(node, self.attributes.inputs, dynamic_attributes)
        dynamic_attributes = self.dynamic_attribute_data(node, og.AttributePortType.ATTRIBUTE_PORT_TYPE_OUTPUT)
        self.outputs = OgnExtractAttrDatabase.ValuesForOutputs(node, self.attributes.outputs, dynamic_attributes)
        dynamic_attributes = self.dynamic_attribute_data(node, og.AttributePortType.ATTRIBUTE_PORT_TYPE_STATE)
        self.state = OgnExtractAttrDatabase.ValuesForState(node, self.attributes.state, dynamic_attributes)
