from .proto.graph_pb2 import GraphDef
from .proto.node_def_pb2 import NodeDef
from .proto.versions_pb2 import VersionDef
from .proto.attr_value_pb2 import AttrValue
from .proto.tensor_shape_pb2 import TensorShapeProto


def attr_value_proto(dtype, shape, s):
    """Creates a dict of objects matching
    https://github.com/tensorflow/tensorboard/blob/master/tensorboard/compat/proto/attr_value.proto
    specifically designed for a NodeDef. The values have been
    reverse engineered from standard TensorBoard logged data.
    """
    attr = {}
    if s is not None:
        attr['attr'] = AttrValue(s=s.encode(encoding='utf_8'))
    if shape is not None:
        shapeproto = tensor_shape_proto(shape)
        attr['_output_shapes'] = AttrValue(list=AttrValue.ListValue(shape=[shapeproto]))
    return attr


def tensor_shape_proto(outputsize):
    """Creates an object matching
    https://github.com/tensorflow/tensorboard/blob/master/tensorboard/compat/proto/tensor_shape.proto
    """
    return TensorShapeProto(dim=[TensorShapeProto.Dim(size=d) for d in outputsize])


def node_proto(name,
               op='UnSpecified',
               input=None,
               dtype=None,
               shape=None,  # type: tuple
               outputsize=None,
               attributes=''
               ):
    """Creates an object matching
    https://github.com/tensorflow/tensorboard/blob/master/tensorboard/compat/proto/node_def.proto
    """
    if input is None:
        input = []
    if not isinstance(input, list):
        input = [input]
    return NodeDef(
        name=name.encode(encoding='utf_8'),
        op=op,
        input=input,
        attr=attr_value_proto(dtype, outputsize, attributes)
    )
