# SPDX-FileCopyrightText: 2020 The Magma Authors.
# SPDX-FileCopyrightText: 2022 Open Networking Foundation <support@opennetworking.org>
#
# SPDX-License-Identifier: BSD-3-Clause

from typing import Any, Callable, Dict, List, Optional, Type

from common.service import MagmaService
from data_models import transform_for_enb, transform_for_magma
from data_models.data_model import DataModel, TrParam
from data_models.data_model_parameters import (
    ParameterName,
    TrParameterType,
)
from device_config.enodeb_config_postprocessor import (
    EnodebConfigurationPostProcessor,
)
from device_config.enodeb_configuration import EnodebConfiguration
from devices.baicells_qafb import (
    BaicellsQafbGetObjectParametersState,
    BaicellsQafbWaitGetTransientParametersState,
)
from devices.device_utils import EnodebDeviceName
from state_machines.enb_acs_impl import BasicEnodebAcsStateMachine
from state_machines.enb_acs_states import (
    AddObjectsState,
    DeleteObjectsState,
    EnbSendRebootState,
    EndSessionState,
    EnodebAcsState,
    ErrorState,
    GetParametersState,
    GetRPCMethodsState,
    SendGetTransientParametersState,
    SetParameterValuesState,
    WaitEmptyMessageState,
    WaitGetParametersState,
    WaitInformMRebootState,
    WaitInformState,
    WaitRebootResponseState,
    WaitSetParameterValuesState,
)


class BaicellsQAFAHandler(BasicEnodebAcsStateMachine):
    def __init__(
        self,
        service: MagmaService,
    ) -> None:
        self._state_map = {}
        super().__init__(service=service, use_param_key=False)

    def reboot_asap(self) -> None:
        self.transition('reboot')

    def is_enodeb_connected(self) -> bool:
        return not isinstance(self.state, WaitInformState)

    def _init_state_map(self) -> None:
        self._state_map = {
            'wait_inform': WaitInformState(self, when_done='get_rpc_methods'),
            'get_rpc_methods': GetRPCMethodsState(self, when_done='wait_empty', when_skip='get_transient_params'),
            'wait_empty': WaitEmptyMessageState(self, when_done='get_transient_params'),
            'get_transient_params': SendGetTransientParametersState(self, when_done='wait_get_transient_params'),
            'wait_get_transient_params': BaicellsQafbWaitGetTransientParametersState(self, when_get='get_params', when_get_obj_params='get_obj_params', when_delete='delete_objs', when_add='add_objs', when_set='set_params', when_skip='end_session'),
            'get_params': GetParametersState(self, when_done='wait_get_params'),
            'wait_get_params': WaitGetParametersState(self, when_done='get_obj_params'),
            'get_obj_params': BaicellsQafbGetObjectParametersState(self, when_delete='delete_objs', when_add='add_objs', when_set='set_params', when_skip='end_session'),
            'delete_objs': DeleteObjectsState(self, when_add='add_objs', when_skip='set_params'),
            'add_objs': AddObjectsState(self, when_done='set_params'),
            'set_params': SetParameterValuesState(self, when_done='wait_set_params'),
            'wait_set_params': WaitSetParameterValuesState(self, when_done='check_get_params', when_apply_invasive='check_get_params'),
            'check_get_params': GetParametersState(self, when_done='check_wait_get_params', request_all_params=True),
            'check_wait_get_params': WaitGetParametersState(self, when_done='end_session'),
            'end_session': EndSessionState(self),
            # These states are only entered through manual user intervention
            'reboot': EnbSendRebootState(self, when_done='wait_reboot'),
            'wait_reboot': WaitRebootResponseState(self, when_done='wait_post_reboot_inform'),
            'wait_post_reboot_inform': WaitInformMRebootState(self, when_done='wait_empty', when_timeout='wait_inform'),
            # The states below are entered when an unexpected message type is
            # received
            'unexpected_fault': ErrorState(self, inform_transition_target='wait_inform'),
        }

    @property
    def device_name(self) -> str:
        return EnodebDeviceName.BAICELLS_QAFA

    @property
    def data_model_class(self) -> Type[DataModel]:
        return BaicellsQAFATrDataModel

    @property
    def config_postprocessor(self) -> EnodebConfigurationPostProcessor:
        return BaicellsQAFATrConfigurationInitializer()

    @property
    def state_map(self) -> Dict[str, EnodebAcsState]:
        return self._state_map

    @property
    def disconnected_state_name(self) -> str:
        return 'wait_inform'

    @property
    def unexpected_fault_state_name(self) -> str:
        return 'unexpected_fault'


class BaicellsQAFATrDataModel(DataModel):
    """
    Class to represent relevant data model parameters from TR-196/TR-098.
    This class is effectively read-only.

    This model specifically targets Qualcomm-based BaiCells units running
    QAFA firmware.

    These models have these idiosyncrasies (on account of running TR098):

    - Parameter content root is different (InternetGatewayDevice)
    - GetParameter queries with a wildcard e.g. InternetGatewayDevice. do
      not respond with the full tree (we have to query all parameters)
    - MME status is not exposed - we assume the MME is connected if
      the eNodeB is transmitting (OpState=true)
    - Parameters such as band capability/duplex config
      are rooted under `boardconf.` and not the device config root
    - Parameters like Admin state, CellReservedForOperatorUse,
      Duplex mode, DL bandwidth and Band capability have different
      formats from Intel-based Baicells units, necessitating,
      formatting before configuration and transforming values
      read from eNodeB state.
    - Num PLMNs is not reported by these units
    """
    # Mapping of TR parameter paths to aliases
    DEVICE_PATH = 'InternetGatewayDevice.'
    FAPSERVICE_PATH = DEVICE_PATH + 'Services.FAPService.1.'
    EEPROM_PATH = 'boardconf.status.eepromInfo.'
    PARAMETERS = {
        # Top-level objects
        ParameterName.DEVICE: TrParam(DEVICE_PATH, True, TrParameterType.OBJECT, False),
        ParameterName.FAP_SERVICE: TrParam(FAPSERVICE_PATH, True, TrParameterType.OBJECT, False),

        # Qualcomm units do not expose MME_Status (We assume that the eNB is broadcasting state is connected to the MME)
        ParameterName.MME_STATUS: TrParam(FAPSERVICE_PATH + 'FAPControl.LTE.OpState', True, TrParameterType.BOOLEAN, False),
        ParameterName.GPS_LAT: TrParam(DEVICE_PATH + 'FAP.GPS.latitude', True, TrParameterType.STRING, False),
        ParameterName.GPS_LONG: TrParam(DEVICE_PATH + 'FAP.GPS.longitude', True, TrParameterType.STRING, False),
        ParameterName.SW_VERSION: TrParam(DEVICE_PATH + 'DeviceInfo.SoftwareVersion', True, TrParameterType.STRING, False),
        ParameterName.SERIAL_NUMBER: TrParam(DEVICE_PATH + 'DeviceInfo.SerialNumber', True, TrParameterType.STRING, False),

        # Capabilities
        ParameterName.DUPLEX_MODE_CAPABILITY: TrParam(EEPROM_PATH + 'div_multiple', True, TrParameterType.STRING, False),
        ParameterName.BAND_CAPABILITY: TrParam(EEPROM_PATH + 'work_mode', True, TrParameterType.STRING, False),

        # RF-related parameters
        ParameterName.EARFCNDL: TrParam(FAPSERVICE_PATH + 'CellConfig.LTE.RAN.RF.EARFCNDL', True, TrParameterType.INT, False),
        ParameterName.PCI1: TrParam(FAPSERVICE_PATH + 'CellConfig.LTE.RAN.RF.PhyCellID', True, TrParameterType.INT, False),
        ParameterName.DL_BANDWIDTH: TrParam(DEVICE_PATH + 'Services.RfConfig.1.RfCarrierCommon.carrierBwMhz', True, TrParameterType.INT, False),
        ParameterName.SUBFRAME_ASSIGNMENT: TrParam(FAPSERVICE_PATH + 'CellConfig.LTE.RAN.PHY.TDDFrame.SubFrameAssignment', True, 'bool', False),
        ParameterName.SPECIAL_SUBFRAME_PATTERN: TrParam(FAPSERVICE_PATH + 'CellConfig.LTE.RAN.PHY.TDDFrame.SpecialSubframePatterns', True, TrParameterType.INT, False),
        ParameterName.CELL_ID: TrParam(FAPSERVICE_PATH + 'CellConfig.LTE.RAN.Common.CellIdentity', True, TrParameterType.UNSIGNED_INT, False),

        # Other LTE parameters
        ParameterName.ADMIN_STATE: TrParam(FAPSERVICE_PATH + 'FAPControl.LTE.AdminState', False, TrParameterType.STRING, False),
        ParameterName.OP_STATE: TrParam(FAPSERVICE_PATH + 'FAPControl.LTE.OpState', True, TrParameterType.BOOLEAN, False),
        ParameterName.RF_TX_STATUS: TrParam(FAPSERVICE_PATH + 'FAPControl.LTE.OpState', True, TrParameterType.BOOLEAN, False),

        # Core network parameters
        ParameterName.MME_ADDRESS: TrParam(FAPSERVICE_PATH + 'FAPControl.LTE.Gateway.S1SigLinkServerList', True, TrParameterType.STRING, False),
        ParameterName.MME_PORT: TrParam(FAPSERVICE_PATH + 'FAPControl.LTE.Gateway.S1SigLinkPort', True, TrParameterType.INT, False),
        # This parameter is standard but doesn't exist
        # ParameterName.NUM_PLMNS: TrParam(FAPSERVICE_PATH + 'CellConfig.LTE.EPC.PLMNListNumberOfEntries', True, TrParameterType.INT, False),
        ParameterName.TAC1: TrParam(FAPSERVICE_PATH + 'CellConfig.LTE.EPC.TAC', True, TrParameterType.INT, False),
        ParameterName.IP_SEC_ENABLE: TrParam('boardconf.ipsec.ipsecConfig.onBoot', False, TrParameterType.BOOLEAN, False),

        # Management server parameters
        ParameterName.PERIODIC_INFORM_ENABLE: TrParam(DEVICE_PATH + 'ManagementServer.PeriodicInformEnable', False, TrParameterType.BOOLEAN, False),
        ParameterName.PERIODIC_INFORM_INTERVAL: TrParam(DEVICE_PATH + 'ManagementServer.PeriodicInformInterval', False, TrParameterType.INT, False),

        # Performance management parameters
        ParameterName.PERF_MGMT_ENABLE: TrParam(DEVICE_PATH + 'FAP.PerfMgmt.Config.Enable', False, TrParameterType.BOOLEAN, False),
        ParameterName.PERF_MGMT_UPLOAD_INTERVAL: TrParam(DEVICE_PATH + 'FAP.PerfMgmt.Config.PeriodicUploadInterval', False, TrParameterType.INT, False),
        ParameterName.PERF_MGMT_UPLOAD_URL: TrParam(DEVICE_PATH + 'FAP.PerfMgmt.Config.URL', False, TrParameterType.STRING, False),
    }

    NUM_PLMNS_IN_CONFIG = 6
    TRANSFORMS_FOR_ENB = {
        ParameterName.CELL_BARRED: transform_for_enb.invert_cell_barred,
    }
    for i in range(1, NUM_PLMNS_IN_CONFIG + 1):
        TRANSFORMS_FOR_ENB[ParameterName.PLMN_N_CELL_RESERVED % i] = transform_for_enb.cell_reserved
        PARAMETERS[ParameterName.PLMN_N % i] = TrParam(FAPSERVICE_PATH + 'CellConfig.LTE.EPC.PLMNList.%d.' % i, True, TrParameterType.STRING, False)
        PARAMETERS[ParameterName.PLMN_N_CELL_RESERVED % i] = TrParam(FAPSERVICE_PATH + 'CellConfig.LTE.EPC.PLMNList.%d.CellReservedForOperatorUse' % i, True, TrParameterType.STRING, False)
        PARAMETERS[ParameterName.PLMN_N_ENABLE % i] = TrParam(FAPSERVICE_PATH + 'CellConfig.LTE.EPC.PLMNList.%d.Enable' % i, True, TrParameterType.BOOLEAN, False)
        PARAMETERS[ParameterName.PLMN_N_PRIMARY % i] = TrParam(FAPSERVICE_PATH + 'CellConfig.LTE.EPC.PLMNList.%d.IsPrimary' % i, True, TrParameterType.BOOLEAN, False)
        PARAMETERS[ParameterName.PLMN_N_PLMNID % i] = TrParam(FAPSERVICE_PATH + 'CellConfig.LTE.EPC.PLMNList.%d.PLMNID' % i, True, TrParameterType.STRING, False)

    TRANSFORMS_FOR_ENB[ParameterName.ADMIN_STATE] = transform_for_enb.admin_state
    TRANSFORMS_FOR_MAGMA = {
        # We don't set these parameters
        ParameterName.BAND_CAPABILITY: transform_for_magma.band_capability,
        ParameterName.DUPLEX_MODE_CAPABILITY: transform_for_magma.duplex_mode,
    }

    @classmethod
    def get_parameter(cls, param_name: ParameterName) -> Optional[TrParam]:
        return cls.PARAMETERS.get(param_name)

    @classmethod
    def _get_magma_transforms(
        cls,
    ) -> Dict[ParameterName, Callable[[Any], Any]]:
        return cls.TRANSFORMS_FOR_MAGMA

    @classmethod
    def _get_enb_transforms(cls) -> Dict[ParameterName, Callable[[Any], Any]]:
        return cls.TRANSFORMS_FOR_ENB

    @classmethod
    def get_load_parameters(cls) -> List[ParameterName]:
        """
        Load all the parameters instead of a subset.
        """
        return list(cls.PARAMETERS.keys())

    @classmethod
    def get_num_plmns(cls) -> int:
        return cls.NUM_PLMNS_IN_CONFIG

    @classmethod
    def get_parameter_names(cls) -> List[ParameterName]:
        excluded_params = [
            str(ParameterName.DEVICE),
            str(ParameterName.FAP_SERVICE),
        ]
        names = list(
            filter(
                lambda x: (not str(x).startswith('PLMN'))
                and (str(x) not in excluded_params),
                cls.PARAMETERS.keys(),
            ),
        )
        return names

    @classmethod
    def get_numbered_param_names(
        cls,
    ) -> Dict[ParameterName, List[ParameterName]]:
        names = {}
        for i in range(1, cls.NUM_PLMNS_IN_CONFIG + 1):
            params = []
            params.append(ParameterName.PLMN_N_CELL_RESERVED % i)
            params.append(ParameterName.PLMN_N_ENABLE % i)
            params.append(ParameterName.PLMN_N_PRIMARY % i)
            params.append(ParameterName.PLMN_N_PLMNID % i)
            names[ParameterName.PLMN_N % i] = params

        return names


class BaicellsQAFATrConfigurationInitializer(EnodebConfigurationPostProcessor):
    def postprocess(self, desired_cfg: EnodebConfiguration) -> None:

        desired_cfg.delete_parameter(ParameterName.ADMIN_STATE)