"""
Copyright 2020 The Magma Authors.

This source code is licensed under the BSD-style license found in the
LICENSE file in the root directory of this source tree.

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 typing import Any

import grpc
from lte.protos.enodebd_pb2 import (
    AllEnodebStatus,
    EnodebIdentity,
    GetParameterRequest,
    GetParameterResponse,
    SetParameterRequest,
    SingleEnodebStatus,
)
from lte.protos.enodebd_pb2_grpc import (
    EnodebdServicer,
    add_EnodebdServicer_to_server,
)
from common.rpc_utils import return_void
from enodeb_status import (
    get_service_status,
    get_single_enb_status,
)
from state_machines.enb_acs import EnodebAcsStateMachine
from state_machines.enb_acs_manager import StateMachineManager
from orc8r.protos.service303_pb2 import ServiceStatus


class EnodebdRpcServicer(EnodebdServicer):
    """ gRPC based server for enodebd """

    def __init__(self, state_machine_manager: StateMachineManager) -> None:
        self.state_machine_manager = state_machine_manager

    def add_to_server(self, server) -> None:
        """
        Add the servicer to a gRPC server
        """
        add_EnodebdServicer_to_server(self, server)

    def _get_handler(self, device_serial: str) -> EnodebAcsStateMachine:
        return self.state_machine_manager.get_handler_by_serial(device_serial)

    def GetParameter(
        self,
        request: GetParameterRequest,
        context: Any,
    ) -> GetParameterResponse:
        """
        Sends a GetParameterValues message. Used for testing only.

        Different data models will have different names for the same
        parameter. Whatever name that the data model uses, we call the
        'parameter path', eg. "Device.DeviceInfo.X_BAICELLS_COM_GPS_Status"
        We denote 'ParameterName' to be a standard string name for
        equivalent parameters between different data models
        """
        # Get the parameter value information
        parameter_path = request.parameter_name
        handler = self._get_handler(request.device_serial)
        data_model = handler.data_model
        param_name = data_model.get_parameter_name_from_path(parameter_path)
        param_value = str(handler.get_parameter(param_name))

        # And now construct the response to the rpc request
        get_parameter_values_response = GetParameterResponse()
        get_parameter_values_response.parameters.add(
            name=parameter_path, value=param_value,
        )
        return get_parameter_values_response

    @return_void
    def SetParameter(self, request: SetParameterRequest, context: Any) -> None:
        """
        Sends a SetParameterValues message. Used for testing only.

        Different data models will have different names for the same
        parameter. Whatever name that the data model uses, we call the
        'parameter path', eg. "Device.DeviceInfo.X_BAICELLS_COM_GPS_Status"
        We denote 'ParameterName' to be a standard string name for
        equivalent parameters between different data models
        """
        # Parse the request
        if request.HasField('value_int'):
            value = (request.value_int, 'int')
        elif request.HasField('value_bool'):
            value = (request.value_bool, 'boolean')
        elif request.HasField('value_string'):
            value = (request.value_string, 'string')
        else:
            context.set_details(
                'SetParameter: Unsupported type %d',
                request.type,
            )
            context.set_code(grpc.StatusCode.INVALID_ARGUMENT)
            return

        # Update the handler so it will set the parameter value
        parameter_path = request.parameter_name
        handler = self._get_handler(request.device_serial)
        data_model = handler.data_model
        param_name = data_model.get_parameter_name_from_path(parameter_path)
        handler.set_parameter_asap(param_name, value)

    @return_void
    def Reboot(self, request: EnodebIdentity, context=None) -> None:
        """ Reboot eNodeB """
        handler = self._get_handler(request.device_serial)
        handler.reboot_asap()

    @return_void
    def RebootAll(self, _=None, context=None) -> None:
        """ Reboot all connected eNodeB devices """
        serial_list = self.state_machine_manager.get_connected_serial_id_list()
        for enb_serial in serial_list:
            handler = self._get_handler(enb_serial)
            handler.reboot_asap()

    def GetStatus(self, _=None, context=None) -> ServiceStatus:
        """
        Get eNodeB status
        Note: input variable defaults used so this can be either called locally
        or as an RPC.
        """
        status = dict(get_service_status(self.state_machine_manager))
        status_message = ServiceStatus()
        status_message.meta.update(status)
        return status_message

    def GetAllEnodebStatus(self, _=None, context=None) -> AllEnodebStatus:
        all_enb_status = AllEnodebStatus()
        serial_list = self.state_machine_manager.get_connected_serial_id_list()
        for enb_serial in serial_list:
            enb_status = get_single_enb_status(
                enb_serial,
                self.state_machine_manager,
            )
            all_enb_status.enb_status_list.add(
                device_serial=enb_status.device_serial,
                ip_address=enb_status.ip_address,
                connected=enb_status.connected,
                configured=enb_status.configured,
                opstate_enabled=enb_status.opstate_enabled,
                rf_tx_on=enb_status.rf_tx_on,
                rf_tx_desired=enb_status.rf_tx_desired,
                gps_connected=enb_status.gps_connected,
                ptp_connected=enb_status.ptp_connected,
                mme_connected=enb_status.mme_connected,
                gps_longitude=enb_status.gps_longitude,
                gps_latitude=enb_status.gps_latitude,
                fsm_state=enb_status.fsm_state,
            )

        return all_enb_status

    def GetEnodebStatus(
        self,
        request: EnodebIdentity,
        _context=None,
    ) -> SingleEnodebStatus:
        return get_single_enb_status(
            request.device_serial,
            self.state_machine_manager,
        )