# Copyright (c) Meta Platforms, Inc. and affiliates.
#
# 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.

# pyre-unsafe

from __future__ import absolute_import, division, print_function, unicode_literals

from typing import Any, AnyStr, TypeVar

from thrift.protocol import THeaderProtocol
from thrift.transport import TTransport


# pyre-fixme[34]: `Variable[AnyStr <: [str, bytes]]` isn't present in the function's
#  parameters.
def serialize(protocol_factory: Any, thr: Any) -> AnyStr:
    """Convenience method for serializing objects using the given
    protocol factory and a TMemoryBuffer."""
    transport = TTransport.TMemoryBuffer()
    protocol = protocol_factory.getProtocol(transport)
    thr.write(protocol)
    if isinstance(protocol, THeaderProtocol.THeaderProtocol):
        protocol.trans.flush()
    return transport.getvalue()


T = TypeVar("T")


def deserialize(protocol_factory: Any, data: AnyStr, thr_out: T) -> T:
    """Convenience method for deserializing objects using the given
    protocol factory and a TMemoryBuffer.  returns its thr_out
    argument."""
    transport = TTransport.TMemoryBuffer(data)
    try:
        protocol = protocol_factory.getProtocol(
            transport,
            # pyre-fixme[16]: `T` has no attribute `thrift_spec`.
            thr_out.thrift_spec,
        )  # noqa: T484
    except TypeError:
        protocol = protocol_factory.getProtocol(transport)
    if isinstance(protocol, THeaderProtocol.THeaderProtocol):
        # this reads the THeader headers to detect what the underlying
        # protocol is, as well as looking at transforms, etc.
        protocol.trans.readFrame(0)
        protocol.reset_protocol()
    # pyre-fixme[16]: `T` has no attribute `read`.
    thr_out.read(protocol)  # noqa: T484
    return thr_out