# Copyright 2022-2024 ETSI SDG TeraFlowSDN (TFS) (https://tfs.etsi.org/)
#
# 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.

import logging, time
from common.proto.context_pb2 import DeviceOperationalStatusEnum, Empty
from common.tools.descriptor.Loader import DescriptorLoader, \
    check_descriptor_load_results, validate_empty_scenario
from context.client.ContextClient import ContextClient
from device.client.DeviceClient import DeviceClient
from tests.Fixtures import context_client, device_client # pylint: disable=unused-import
from test_common import *

LOGGER = logging.getLogger(__name__)
LOGGER.setLevel(logging.DEBUG)

def test_scenario_bootstrap(
    context_client : ContextClient, # pylint: disable=redefined-outer-name
    device_client : DeviceClient    # pylint: disable=redefined-outer-name
) -> None:
    """
    This test assumes that the environment is in a clean state (empty)
    before bootstrapping the P4 topology.
    It loads the topology descriptor and verifies that no other services
    or slices are created.
    """
    validate_empty_scenario(context_client)

    descriptor_loader = DescriptorLoader(
        descriptors_file=DESC_TOPO, context_client=context_client, device_client=device_client)
    results = descriptor_loader.process()
    check_descriptor_load_results(results, descriptor_loader)
    descriptor_loader.validate()

    # Verify the scenario has no services/slices
    response = context_client.GetContext(ADMIN_CONTEXT_ID)
    assert len(response.service_ids) == 0
    assert len(response.slice_ids) == 0

def test_scenario_devices_enabled(
    context_client : ContextClient  # pylint: disable=redefined-outer-name
) -> None:
    """
    This test validates that the devices are enabled.
    """
    DEVICE_OP_STATUS_ENABLED = DeviceOperationalStatusEnum.DEVICEOPERATIONALSTATUS_ENABLED

    num_devices = -1
    num_devices_enabled, num_retry = 0, 0
    while (num_devices != num_devices_enabled) and (num_retry < 10):
        time.sleep(1.0)
        response = context_client.ListDevices(Empty())
        num_devices = len(response.devices)
        num_devices_enabled = 0
        for device in response.devices:
            if device.device_operational_status != DEVICE_OP_STATUS_ENABLED: continue
            num_devices_enabled += 1
        LOGGER.info('Num Devices enabled: {:d}/{:d}'.format(num_devices_enabled, num_devices))
        num_retry += 1
    assert num_devices_enabled == num_devices