import asyncio
import logging

from google.protobuf.message import DecodeError

from im360.contracts.message_pb2 import SendInfo
from defence360agent.utils.buffer import SizeBuffer

logger = logging.getLogger(__name__)


class Protobuf(asyncio.Protocol):
    def __init__(self, name, loop, sink):
        self._buf = SizeBuffer()
        self._loop = loop
        self._name = name
        self._sink = sink

    def data_received(self, data):
        self._buf.append(data)
        for data in self._buf:
            parcel = SendInfo()
            try:
                parcel.ParseFromString(data)
            except DecodeError:
                logger.debug("Invalid protobuf message: %s", data)
                logger.exception(
                    "Failed to parse protobuf message from %s", self._name
                )
            else:
                logger.debug("Received protobuf message: %s", parcel)
                self.process_protobuf(parcel)

    def process_protobuf(self, parcel):
        pass