from .gzippacked import GzipPacked
from ..types import RpcError


class RpcResult:
    CONSTRUCTOR_ID = 0xf35c6d01

    def __init__(self, req_msg_id, body, error):
        self.req_msg_id = req_msg_id
        self.body = body
        self.error = error

    @classmethod
    def from_reader(cls, reader):
        msg_id = reader.read_long()
        inner_code = reader.read_int(signed=False)
        if inner_code == RpcError.CONSTRUCTOR_ID:
            return RpcResult(msg_id, None, RpcError.from_reader(reader))
        if inner_code == GzipPacked.CONSTRUCTOR_ID:
            return RpcResult(msg_id, GzipPacked.from_reader(reader).data, None)

        reader.seek(-4)
        return RpcResult(msg_id, reader.read(), None)