# -------------------------------------------------------------------------
#   Copyright (c) 2020 Huawei Intellectual Property
#
#   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 json
from osdf.logging.osdf_logging import MH, audit_log
"""
This application generates NST SELECTION API calls using the information received from SO
"""

def buildSolution(request_json):
    return {
        "NSTsolution" : getNSTSolution(request_json)
    }

def getNSTSolution(request_json):
# the file is in the same folder for now will move it to the conf folder o fthe has once its integrated there...
    with open('./conf/configIinputs.json', 'r') as openfile:
        serviceProfile = request_json["serviceProfile"]
        resourceName = "NST"
        serviceProfileParameters = serviceProfile["serviceProfileParameters"]
        nst_object = json.load(openfile)
        foundNst = False
        for nst in nst_object[resourceName]:
            [(nstName, nstList)] = nst.items()
            matchall = False
            for constraint_name in serviceProfileParameters:
                value = serviceProfileParameters[constraint_name]
                constraint_value= nstList[constraint_name]
                if constraint_value != value:
                    matchall = False
                    break
                else:
                    matchall = True
            if matchall:
                foundNst = True
                NSTName = nstList["name"]
                matchlevel = 1
    if not(foundNst):
        NSTName = None
        matchlevel = 0
    return {
        "invariantUUID" : "INvariant UUID",
        "UUID" : "uuid",
        "NSTName" : NSTName,
        "matchLevel" : matchlevel
    }


def process_nst_selection( request_json, osdf_config):
    """
    Process a PCI request from a Client (build config-db, policy and  API call, make the call, return result)
    :param req_object: Request parameters from the client
    :param osdf_config: Configuration specific to OSDF application (core + deployment)
    :return: response from NST Opt
    """
    solution = buildSolution(request_json)

    return {
        "requestId" : request_json['requestInfo']['requestId'],
        "transactionId" : request_json['requestInfo']['transactionId'],
        "statusMessage" : " ",
        "requestStatus" : "accepted",
        "solutions" : solution
    }