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# Copyright 2021-2023 H2020 TeraFlow (https://www.teraflow-h2020.eu/)
#
# 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 copy
from typing import Dict, List, Optional, Tuple

def get_descriptors_add_contexts(contexts : List[Dict]) -> List[Dict]:
    contexts_add = copy.deepcopy(contexts)
    for context in contexts_add:
        context['topology_ids'] = []
        context['service_ids'] = []
    return contexts_add

def get_descriptors_add_topologies(topologies : List[Dict]) -> List[Dict]:
    topologies_add = copy.deepcopy(topologies)
    for topology in topologies_add:
        topology['device_ids'] = []
        topology['link_ids'] = []
    return topologies_add

def get_descriptors_add_services(services : List[Dict]) -> List[Dict]:
    services_add = []
    for service in services:
        service_copy = copy.deepcopy(service)
        service_copy['service_endpoint_ids'] = []
        service_copy['service_constraints'] = []
        service_copy['service_config'] = {'config_rules': []}
        services_add.append(service_copy)
    return services_add

def get_descriptors_add_slices(slices : List[Dict]) -> List[Dict]:
    slices_add = []
    for slice in slices:
        slice_copy = copy.deepcopy(slice)
        slice_copy['slice_endpoint_ids'] = []
        slice_copy['slice_constraints'] = []
        slice_copy['slice_config'] = {'config_rules': []}
        slices_add.append(slice_copy)
    return slices_add

def split_devices_by_rules(devices : List[Dict]) -> Tuple[List[Dict], List[Dict]]:
    devices_add = []
    devices_config = []
    for device in devices:
        connect_rules = []
        config_rules = []
        for config_rule in device.get('device_config', {}).get('config_rules', []):
            custom_resource_key : Optional[str] = config_rule.get('custom', {}).get('resource_key')
            if custom_resource_key is not None and custom_resource_key.startswith('_connect/'):
                connect_rules.append(config_rule)
            else:
                config_rules.append(config_rule)

        if len(connect_rules) > 0:
            device_add = copy.deepcopy(device)
            device_add['device_endpoints'] = []
            device_add['device_config'] = {'config_rules': connect_rules}
            devices_add.append(device_add)

        if len(config_rules) > 0:
            device['device_config'] = {'config_rules': config_rules}
            devices_config.append(device)

    return devices_add, devices_config