from ingestor.proto import opc_gateway_pb2, opc_gateway_pb2_grpc


def test_read_tag_request_roundtrip():
    req = opc_gateway_pb2.ReadTagRequest(server_id='s1', addr='ns=2;s=Tag1', data_type='Float')

    data = req.SerializeToString()
    parsed = opc_gateway_pb2.ReadTagRequest()
    parsed.ParseFromString(data)

    assert parsed.server_id == 's1'
    assert parsed.addr == 'ns=2;s=Tag1'
    assert parsed.data_type == 'Float'


def test_read_tag_response_roundtrip():
    resp = opc_gateway_pb2.ReadTagResponse(
        value='42.0',
        opc_status_code='Good',
        source_timestamp='2026-07-14T00:00:00Z',
        server_timestamp='2026-07-14T00:00:01Z',
        persisted=True,
    )

    data = resp.SerializeToString()
    parsed = opc_gateway_pb2.ReadTagResponse()
    parsed.ParseFromString(data)

    assert parsed.value == '42.0'
    assert parsed.opc_status_code == 'Good'
    assert parsed.persisted is True


def test_grpc_stub_module_loads():
    assert hasattr(opc_gateway_pb2_grpc, 'OpcGatewayStub')
    assert hasattr(opc_gateway_pb2_grpc, 'OpcGatewayServicer')