# Copyright (c) 2018, CMCC Technologies Co., Ltd.

# 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.

from rest_framework import serializers

from lcm.ns.serializers.sol.resource_handle import ResourceHandleSerializer
from lcm.ns.serializers.sol.ns_instance import NsCpHandleSerializer, NfpRuleSerializer
from lcm.ns.serializers.sol.cp_serializers import CpProtocolDataSerializer
from lcm.ns.serializers.sol.cp_serializers import IpAddressesDataSerialzier
from lcm.ns.enum import OPERATIONAL_STATE, STOP_TYPE
from lcm.pub.utils.enumutil import enum_to_list


class VnfInstanceDataSerializer(serializers.Serializer):
    vnfInstanceId = serializers.CharField(
        help_text="Specify the target NS instance where the VNF instances are moved to",
        required=True)
    vnfProfileId = serializers.CharField(
        help_text="Specify the VNF instance that is moved.",
        required=False,
        allow_null=True)


class InstantiateVnfDataSerializer(serializers.Serializer):
    vnfdId = serializers.CharField(
        help_text="Information sufficient to identify the VNFD which defines the VNF to be instantiated.",
        required=True)
    vnfFlavourId = serializers.CharField(
        help_text="Identifier of the VNF deployment flavour to be instantiated.",
        required=True)
    vnfInstantiationLevelId = serializers.CharField(
        help_text="Identifier of the instantiation level of the deployment flavour to be instantiated.",
        required=False,
        allow_null=True)
    vnfInstanceName = serializers.CharField(
        help_text="Human-readable name of the VNF instance to be created.",
        required=False,
        allow_null=True)


class IpOverEthernetAddressDataSerializer(serializers.Serializer):
    macAddress = serializers.CharField(
        help_text="Mac address",
        required=False,
        allow_null=True)
    ipAddresses = IpAddressesDataSerialzier(
        help_text="List of IP addresses to assign to the extCP instance.",
        required=False,
        allow_null=True,
        many=True)


class VnfExtCpConfigSerializer(serializers.Serializer):
    cpInstanceId = serializers.CharField(
        help_text="Identifier of the external CP instance to which this set of configuration parameters is requested to be applied.",
        required=False,
        allow_null=True)
    linkPortId = serializers.CharField(
        help_text="Identifier of a pre-conFigured link port to which the external CP will be associated.",
        required=False,
        allow_null=True)
    cpProtocolData = serializers.ListField(
        help_text="Parameters for configuring the network protocols on the link port that connects the CP to a VL",
        child=CpProtocolDataSerializer(
            help_text="This type represents network protocol data.",
            required=True),
        required=False,
        allow_null=True)


class VnfExtCpData(serializers.Serializer):
    cpdId = serializers.CharField(
        help_text="The identifier of the CPD in the VNFD.",
        required=True)
    cpConfig = serializers.ListField(
        help_text="List of instance data that need to be conFigured on the CP instances created from the respective CPD.",
        child=(VnfExtCpConfigSerializer(
            help_text="Config of vnf ext cp",
            required=True)),
        required=False,
        allow_null=True)


class ExtLinkPortDataSerializer(serializers.Serializer):
    id = serializers.CharField(
        help_text="Provided by the entity that has created the link port.",
        required=True)
    resourceHandle = ResourceHandleSerializer(
        help_text="Identifier(s) of the virtualised network resource(s) realizing the VL instance.",
        required=True)


class ExtVirtualLinkDataSerializer(serializers.Serializer):
    extVirtualLinkId = serializers.CharField(
        help_text="The identifier of the external VL instance, if provided.",
        required=False,
        allow_null=True)
    vimId = serializers.CharField(
        help_text="Identifier of the VIM that manages this resource.",
        required=False,
        allow_null=True)
    resourceProviderId = serializers.CharField(
        help_text="Identifies the entity responsible for the management of this resource.",
        required=False,
        allow_null=True)
    resourceId = serializers.CharField(
        help_text="The identifier of the resource in the scope of the VIM or the resource provider.",
        required=True)
    extCps = serializers.ListField(
        help_text="External CPs of the VNF to be connected to this external VL.",
        child=VnfExtCpData(),
        required=False,
        allow_null=True)
    extLinkPorts = serializers.ListField(
        help_text="Externally provided link ports to be used to connect external connection points to this external VL.",
        child=(ExtLinkPortDataSerializer(
            help_text="This type represents an externally provided link port to be used to connect a VNF external connection point to an external VL",
            required=True)),
        required=False,
        allow_null=True)


class ExtManagedVirtualLinkDataSerializer(serializers.Serializer):
    extManagedVirtualLinkId = serializers.CharField(
        help_text="The identifier of the externally-managed internal VL instance,if provided.",
        required=False,
        allow_null=True)
    virtualLinkDescId = serializers.CharField(
        help_text="The identifier of the VLD in the VNFD for this VL.",
        required=True)
    vimId = serializers.CharField(
        help_text="Identifier of the VIMthat manage this resource.",
        required=False,
        allow_null=True)
    resourceProviderId = serializers.CharField(
        help_text="Identifies the entity responsible for the management of this resource.",
        required=False,
        allow_null=True)
    resourceId = serializers.CharField(
        help_text="The identifier of the resource in the scope of the VIM or the resource provider.",
        required=True)


class ChangeVnfFlavourDataSerizlizer(serializers.Serializer):
    vnfInstanceId = serializers.CharField(
        help_text="Identifier of the VNF instance to be modified.",
        required=True)
    newFlavourId = serializers.CharField(
        help_text="Identifier of the VNF deployment flavour to be instantiated.",
        required=True)
    instantiationLevelId = serializers.CharField(
        help_text="Identifier of the instantiation level of the deployment flavour to be instantiated.",
        required=False,
        allow_null=True)
    extVirtualLinks = serializers.ListField(
        help_text="Information about external VLs to connect the VNF to.",
        child=ExtVirtualLinkDataSerializer(
            help_text="This type represents an external VL",
            required=True),
        required=False,
        allow_null=True)
    extManagedVirtualLinks = serializers.ListField(
        help_text="Information about internal VLs that are managed by NFVO.",
        child=ExtManagedVirtualLinkDataSerializer(
            help_text="This type represents an externally-managed internal VL.",
            required=True),
        required=False,
        allow_null=True)
    additionalParams = serializers.CharField(
        help_text="Additional input parameters for the flavour change process",
        required=False,
        allow_null=True)


class OperationalStatesSerializer(serializers.Serializer):
    OperationalStates = serializers.ChoiceField(
        help_text="State of operation",
        choices=enum_to_list(OPERATIONAL_STATE))


class StopTypeSerializer(serializers.Serializer):
    StopType = serializers.ChoiceField(
        help_text="Type of stop",
        choices=enum_to_list(STOP_TYPE))


class OperateVnfDataSerializer(serializers.Serializer):
    vnfInstanceId = serializers.CharField(
        help_text="Identifier of the VNF instance.",
        required=True)
    changeStateTo = OperationalStatesSerializer(
        help_text="The desired operational state to change the VNF to.",
        required=True)
    stopType = StopTypeSerializer(
        help_text="It signals whether forceful or graceful stop is requested.",
        required=False,
        allow_null=True)
    gracefulStopTimeout = serializers.CharField(
        help_text="The time interval to wait for the VNF to be taken out of service during graceful stop.",
        required=False,
        allow_null=True)


class ModifyVnfInfoDataSerializer(serializers.Serializer):
    vnfInstanceId = serializers.UUIDField(
        help_text="Identifier of the VNF instance."
    )
    vnfInstanceName = serializers.CharField(
        help_text="New value of the 'vnfInstanceName' attribute in 'VnfInstance', or 'null' to remove the attribute.",
        max_length=255,
        required=False,
        allow_null=True,
        allow_blank=True)
    vnfInstanceDescription = serializers.CharField(
        help_text="If present, this attribute signals modifications of the 'vnfInstanceDescription' attribute in 'VnfInstance'",
        required=False,
        allow_null=True,
        allow_blank=True)
    vnfPkgId = serializers.UUIDField(
        help_text="New value of the 'vnfPkgId' attribute in 'VnfInstance' The value 'null' is not permitted.."
    )
    vnfConfigurableProperties = serializers.DictField(
        help_text="Modifications to entries in the 'vnfConfigurableProperties' list, as defined below this Table.",
        child=serializers.CharField(
            help_text="KeyValue Pairs",
            allow_blank=True),
        required=False,
        allow_null=True)
    metaData = serializers.DictField(
        help_text="If present, this attribute signals modifications of certain 'metadata' attribute in 'vnfInstance'.",
        child=serializers.CharField(
            help_text="KeyValue Pairs",
            allow_blank=True),
        required=False,
        allow_null=True)
    extensions = serializers.DictField(
        help_text="If present,this attribute signals modifications of certain 'extensions' attribute in 'vnfInstance'.",
        child=serializers.CharField(
            help_text="KeyValue Pairs",
            allow_blank=True),
        required=False,
        allow_null=True)


class ChangeExtVnfConnectivityDataSerializer(serializers.Serializer):
    vnfInstanceId = serializers.CharField(
        help_text="Identifier of the VNF instance.",
        required=True,
        allow_null=True)
    extVirtualLinks = serializers.ListField(
        help_text="Information about external VLs to change",
        child=ExtVirtualLinkDataSerializer(
            help_text="Data of ext virtual link",
            required=True),
        required=False,
        allow_null=True)
    additionalParams = serializers.CharField(
        help_text="Additional parameters passed by the OSS as input to the external connectivity change process",
        required=False,
        allow_null=True)


class SapDataSerializer(serializers.Serializer):
    sapdId = serializers.CharField(
        help_text="Reference to the SAPD for this SAP.",
        required=True)
    sapName = serializers.CharField(
        help_text="Human readable name for the SAP.",
        required=True)
    description = serializers.CharField(
        help_text="Human readable description for the SAP. ",
        required=True)
    sapProtocolData = serializers.ListField(
        help_text="Parameters for configuring the network protocols on the SAP.",
        child=CpProtocolDataSerializer(
            help_text="This type represents network protocol data.",
            required=True),
        required=False,
        allow_null=True)


class AssocNewNsdVersionDataSerializer(serializers.Serializer):
    newNsdId = serializers.CharField(
        help_text="Identifier of the new NSD version that is to be associated to the NS instance.",
        required=True)


class MoveVnfInstanceDataSerializer(serializers.Serializer):
    targetNsInstanceId = serializers.CharField(
        help_text="Specify the target NS instance where the VNF instances are moved to.",
        required=True)
    vnfInstanceId = serializers.CharField(
        help_text="Specify the VNF instance that is moved.",
        required=False,
        allow_null=True)


class PortRangeSerializer(serializers.Serializer):
    lowerPort = serializers.CharField(
        help_text="Identifies the lower bound of the port range.",
        required=True)
    upperPort = serializers.CharField(
        help_text="Identifies the upper bound of the port range ",
        required=True)


class NfpDataSerializer(serializers.Serializer):
    nfpInfoId = serializers.CharField(
        help_text="Identifier of the NFP to be modified.",
        required=False,
        allow_null=True)
    nfpName = serializers.CharField(
        help_text="Human readable name for the NFP.",
        required=False,
        allow_null=True)
    description = serializers.CharField(
        help_text="Human readable description for the NFP.",
        required=False,
        allow_null=True)
    nsCpHandle = serializers.ListField(
        help_text="HanIdentifier(s) of the CPs and SAPs which the NFP passes by.",
        child=NsCpHandleSerializer(
            help_text="This type represents an identifier of the CP or SAP instance.",
            required=True),
        required=False,
        allow_null=True)
    nfpRule = NfpRuleSerializer(
        help_text="NFP classification and selection rule.",
        required=False,
        allow_null=True)


class UpdateVnffgDataSerializer(serializers.Serializer):
    vnffgInfoId = serializers.CharField(
        help_text="Identifier of an existing VNFFG to be updated for the NS Instance.",
        required=True)
    nfp = serializers.ListField(
        help_text="Indicate the desired new NFP(s) for a given VNFFG after the operations of addition/removal of NS components (e.g. VNFs, VLs, etc.) have been completed, or indicate the updated or newly created NFP classification and selection rule which applied to an existing NFP.",
        child=NfpDataSerializer(),
        required=False,
        allow_null=True)
    nfpInfoId = serializers.ListField(
        help_text="Identifiers of the NFP to be deleted from a given VNFFG.",
        child=serializers.CharField(help_text="Identifier of the NFP to be deleted from a given VNFFG."),
        required=False,
        allow_null=True)


class ChangeNsFlavourDataSerializer(serializers.Serializer):
    newNsFlavourId = serializers.CharField(
        help_text="Identifier of the new NS DF to apply to this NS instance.",
        required=True)
    instantiationLevelId = serializers.CharField(
        help_text="Identifier of the instantiation level of the deployment flavour to be instantiated.",
        required=False,
        allow_null=True)


# class IdentifierInPnfSerializer(serializers.Serializer):
#    IdentifierInPnf = serializers.Serializer(
#        help_text="An Identifier that is unique within respect to a PNF.")


# class IdentifierInNsdSerializer(serializers.Serializer):
#    IdentifierInNsd = serializers.Serializer(help_text="An identifier that is unique within a NS descriptor")


class PnfExtCpDataSerializer(serializers.Serializer):
    cpInstanceId = serializers.CharField(  # sol 2.05.01 cpInstanceI16 typo
        help_text="Identifier of the CP. Shall be present for existing CP.",
        required=False,
        allow_null=True)
    cpdId = serializers.CharField(
        help_text="Identifier of the Connection Point Descriptor (CPD) for this CP",
        required=False, allow_null=True)
    cpProtocolData = CpProtocolDataSerializer(
        help_text="Address assigned for this CP.",
        required=False,
        allow_null=True,
        many=True)


class AddPnfDataSerializer(serializers.Serializer):
    pnfId = serializers.CharField(
        help_text="Identifier of the PNF.",
        required=True)
    pnfName = serializers.CharField(
        help_text="Name of the PNF.",
        required=True)
    pnfdId = serializers.CharField(
        help_text="Identifier of the PNFD on which the PNF is based.",
        required=True)
    pnfProfileId = serializers.CharField(
        help_text="Identifier of related PnfProfile in the NSD on which the PNF is based.",
        required=True)
    cpData = PnfExtCpDataSerializer(
        help_text="Address assigned for the PNF external CP(s).",
        required=False,
        allow_null=True,
        many=True)


class ModifyPnfDataSerializer(serializers.Serializer):
    pnfId = serializers.CharField(
        help_text="Identifier of the PNF.",
        required=True)
    pnfName = serializers.CharField(
        help_text="Name of the PNF",
        required=False,
        allow_null=True)
    cpData = serializers.ListField(
        help_text="Address assigned for the PNF external CP(s).",
        child=PnfExtCpDataSerializer(
            help_text="This type represents the configuration data on the external CP of the PNF."),
        required=False,
        allow_null=True)


# class DateTimeSerializer(serializers.Serializer):
#    DateTime = serializers.Serializer(help_text="Date-time stamp.")


class UpdateNsReqSerializer(serializers.Serializer):
    updateType = serializers.ChoiceField(
        help_text="The type of update.",
        choices=["ADD_VNF", "REMOVE_VNF", "INSTANTIATE_VNF", "CHANGE_VNF_DF",
                 "OPERATE_VNF", "MODIFY_VNF_INFORMATION",
                 "CHANGE_EXTERNAL_VNF_CONNECTIVITY", "REMOVE_SAP", "ADD_NESTED_NS",
                 "REMOVE_NESTED_NS", "ASSOC_NEW_NSD_VERSION", "MOVE_VNF", "ADD_VNFFG",
                 "REMOVE_VNFFG", "UPDATE_VNFFG", "CHANGE_NS_DF", "ADD_PNF",
                 "MODIFY_PNF", "REMOVE_PNF"],
        required=True)
    addVnfInstance = serializers.ListField(
        help_text="Identifies an existing VNF instance to be added to the NS instance.",
        child=VnfInstanceDataSerializer(
            help_text="Data of vnf instance",
            required=True),
        required=False,
        allow_null=True)
    removeVnfInstanceId = serializers.ListField(
        help_text="Identifies an existing VNF instance to be removed from the NS instance.",
        child=serializers.CharField(),
        required=False,
        allow_null=True)
    instantiateVnfData = serializers.ListField(
        help_text="Identifies the new VNF to be instantiated.",
        child=(InstantiateVnfDataSerializer(
            help_text="Data of vnf instance.",
            required=True)),
        required=False,
        allow_null=True)
    changeVnfFlavourData = serializers.ListField(
        help_text="Identifies the new DF of the VNF instance to be changed to.",
        child=(ChangeVnfFlavourDataSerizlizer(
            help_text="The type represents the information that is requested to be changed deployment flavour for an existing VNF instance.",
            required=True)),
        required=False,
        allow_null=True)
    operateVnfData = serializers.ListField(
        help_text="This type represents a VNF instance for which the operational state needs to be changed and the requested new state.",
        child=(OperateVnfDataSerializer(
            help_text="This type represents a VNF instance for which the operational state needs to be changed and the requested new state",
            required=True)),
        required=False,
        allow_null=True)
    modifyVnfInfoData = serializers.ListField(
        help_text="This type represents the information that is requested to be modified for a VNF instance. ",
        child=(ModifyVnfInfoDataSerializer(
            help_text="This type represents the information that is requested to be modified for a VNF instance. ",
            required=True)),
        required=False,
        allow_null=True)
    changeExtVnfConnectivityData = serializers.ListField(
        help_text="Specifies the new external connectivity datas of the VNF instance to be changed.",
        child=ChangeExtVnfConnectivityDataSerializer(
            help_text="This type describes the information invoked by the NFVO to change the external VNF connectivity information maintained by the VNFM.",
            required=True),
        required=False,
        allow_null=True)
    addSap = serializers.ListField(
        help_text="Identifies a new SAP to be added to the NS instance.",
        child=SapDataSerializer(help_text="This type represents the information related to a SAP of a NS",
                                required=True),
        required=False,
        allow_null=True)
    removeSapId = serializers.ListField(
        help_text="The identifier an existing SAP to be removed from the NS instance",
        required=False,
        allow_null=True)
    addNestedNsId = serializers.ListField(
        help_text="The identifier of an existing nested NS instance to be added to the NS instance.",
        required=False,
        allow_null=True)
    removeNestedNsId = serializers.ListField(
        help_text="The identifier of an existing nested NS instance to be removed from the NS instance.",
        required=False,
        allow_null=True)
    assocNewNsdVersionData = AssocNewNsdVersionDataSerializer(
        help_text="Specify the new NSD to be used for the NS instance.",
        required=False,
        allow_null=True)
    moveVnfInstanceData = serializers.ListField(
        help_text="Specify existing VNF instance to be moved from one NS instance to another NS instance",
        child=MoveVnfInstanceDataSerializer(),
        required=False,
        allow_null=True)
    addVnffg = serializers.ListField(
        help_text="The identifier of an existing nested NS instance to be added to the NS instance.",
        required=False,
        allow_null=True)
    removeVnffgId = serializers.ListField(
        help_text="The identifier of an existing nested NS instance to be removed from the NS instance",
        child=serializers.CharField(),
        required=False,
        allow_null=True)
    updateVnffg = serializers.ListField(
        help_text="Specify the new VNFFG Information data to be updated for a VNFFG of the NS Instance.",
        child=UpdateVnffgDataSerializer(
            help_text="This type specifies the parameters used for the update of an existing VNFFG instance.",
            required=True),
        required=False,
        allow_null=True)
    changeNsFlavourData = ChangeNsFlavourDataSerializer(
        help_text="Specifies the new DF to be applied to the NS instance.",
        required=False,
        allow_null=True)
    addPnfData = serializers.ListField(
        help_text="Specifies the PNF to be added into the NS instance.",
        child=AddPnfDataSerializer(
            help_text="Serializer data of add PNF",
            required=True),
        required=False,
        allow_null=True)
    modifyPnfData = serializers.ListField(
        help_text="Specifies the PNF to be modified in the NS instance.",
        child=ModifyPnfDataSerializer(
            help_text="This type specifies an PNF to be modified in the NS instance.",
            required=True),
        required=False,
        allow_null=True)
    removePnfId = serializers.ListField(
        help_text="Identifier of the PNF to be deleted from the NS instance.",
        required=False,
        allow_null=True)
    updateTime = serializers.CharField(
        help_text="Timestamp indicating the update time of the NS",
        required=False
    )