#
# Copyright 2017 the original author or authors.
#
# 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.
#

"""
Broadcom OpenOMCI OLT/ONU adapter handler.
"""

import ast
import arrow
import structlog

from collections import OrderedDict

from twisted.internet import reactor, task
from twisted.internet.defer import DeferredQueue, inlineCallbacks, returnValue, TimeoutError

from heartbeat import HeartBeat
from pyvoltha.adapters.extensions.events.device_events.onu.onu_active_event import OnuActiveEvent
from pyvoltha.adapters.extensions.events.kpi.onu.onu_pm_metrics import OnuPmMetrics
from pyvoltha.adapters.extensions.events.kpi.onu.onu_omci_pm import OnuOmciPmMetrics
from pyvoltha.adapters.extensions.events.adapter_events import AdapterEvents

import pyvoltha.common.openflow.utils as fd
from pyvoltha.common.utils.registry import registry
from pyvoltha.common.config.config_backend import ConsulStore
from pyvoltha.common.config.config_backend import EtcdStore
from voltha_protos.common_pb2 import OperStatus, ConnectStatus, AdminState
from voltha_protos.openflow_13_pb2 import OFPXMC_OPENFLOW_BASIC, ofp_port, OFPPS_LIVE, OFPPF_FIBER, OFPPF_1GB_FD
from voltha_protos.inter_container_pb2 import InterAdapterMessageType, \
    InterAdapterOmciMessage, PortCapability, InterAdapterTechProfileDownloadMessage
from voltha_protos.openolt_pb2 import OnuIndication
from pyvoltha.adapters.extensions.omci.onu_configuration import OMCCVersion
from pyvoltha.adapters.extensions.omci.onu_device_entry import OnuDeviceEvents, \
    OnuDeviceEntry, IN_SYNC_KEY
from omci.brcm_mib_download_task import BrcmMibDownloadTask
from omci.brcm_tp_service_specific_task import BrcmTpServiceSpecificTask
from omci.brcm_uni_lock_task import BrcmUniLockTask
from omci.brcm_vlan_filter_task import BrcmVlanFilterTask
from onu_gem_port import *
from onu_tcont import *
from pon_port import *
from uni_port import *
from onu_traffic_descriptor import *
from pyvoltha.common.tech_profile.tech_profile import TechProfile
from pyvoltha.adapters.extensions.omci.tasks.omci_test_request import OmciTestRequest
from pyvoltha.adapters.extensions.omci.omci_entities import AniG

OP = EntityOperations
RC = ReasonCodes

log = structlog.get_logger()

_STARTUP_RETRY_WAIT = 20


class BrcmOpenomciOnuHandler(object):

    def __init__(self, adapter, device_id):
        self.log = structlog.get_logger(device_id=device_id)
        self.log.debug('function-entry')
        self.adapter = adapter
        self.core_proxy = adapter.core_proxy
        self.adapter_proxy = adapter.adapter_proxy
        self.parent_adapter = None
        self.parent_id = None
        self.device_id = device_id
        self.incoming_messages = DeferredQueue()
        self.event_messages = DeferredQueue()
        self.proxy_address = None
        self.tx_id = 0
        self._enabled = False
        self.events = None
        self.pm_metrics = None
        self._omcc_version = OMCCVersion.Unknown
        self._total_tcont_count = 0  # From ANI-G ME
        self._qos_flexibility = 0  # From ONT2_G ME

        self._onu_indication = None
        self._unis = dict()  # Port # -> UniPort

        self._pon = None
        # TODO: probably shouldnt be hardcoded, determine from olt maybe?
        self._pon_port_number = 100
        self.logical_device_id = None

        self._heartbeat = HeartBeat.create(self, device_id)

        # Set up OpenOMCI environment
        self._onu_omci_device = None
        self._dev_info_loaded = False
        self._deferred = None

        self._in_sync_subscription = None
        self._connectivity_subscription = None
        self._capabilities_subscription = None

        self.mac_bridge_service_profile_entity_id = 0x201
        self.gal_enet_profile_entity_id = 0x1

        self._tp_service_specific_task = dict()
        self._tech_profile_download_done = dict()
        # Stores information related to queued vlan filter tasks
        # Dictionary with key being uni_id and value being device,uni port ,uni id and vlan id

        self._queued_vlan_filter_task = dict()

        # Initialize KV store client
        self.args = registry('main').get_args()
        if self.args.backend == 'etcd':
            host, port = self.args.etcd.split(':', 1)
            self.kv_client = EtcdStore(host, port,
                                       TechProfile.KV_STORE_TECH_PROFILE_PATH_PREFIX)
        elif self.args.backend == 'consul':
            host, port = self.args.consul.split(':', 1)
            self.kv_client = ConsulStore(host, port,
                                         TechProfile.KV_STORE_TECH_PROFILE_PATH_PREFIX)
        else:
            self.log.error('Invalid-backend')
            raise Exception("Invalid-backend-for-kv-store")

    @property
    def enabled(self):
        return self._enabled

    @enabled.setter
    def enabled(self, value):
        if self._enabled != value:
            self._enabled = value

    @property
    def omci_agent(self):
        return self.adapter.omci_agent

    @property
    def omci_cc(self):
        return self._onu_omci_device.omci_cc if self._onu_omci_device is not None else None

    @property
    def heartbeat(self):
        return self._heartbeat

    @property
    def uni_ports(self):
        return self._unis.values()

    def uni_port(self, port_no_or_name):
        if isinstance(port_no_or_name, (str, unicode)):
            return next((uni for uni in self.uni_ports
                         if uni.name == port_no_or_name), None)

        assert isinstance(port_no_or_name, int), 'Invalid parameter type'
        return next((uni for uni in self.uni_ports
                    if uni.port_number == port_no_or_name), None)

    @property
    def pon_port(self):
        return self._pon

    def receive_message(self, msg):
        if self.omci_cc is not None:
            self.omci_cc.receive_message(msg)

    def get_ofp_port_info(self, device, port_no):
        self.log.info('get_ofp_port_info', port_no=port_no, device_id=device.id)
        cap = OFPPF_1GB_FD | OFPPF_FIBER

        hw_addr=mac_str_to_tuple('08:%02x:%02x:%02x:%02x:%02x' %
                                ((device.parent_port_no >> 8 & 0xff),
                                  device.parent_port_no & 0xff,
                                  (port_no >> 16) & 0xff,
                                  (port_no >> 8) & 0xff,
                                   port_no & 0xff))

        uni_port = self.uni_port(int(port_no))
        name = device.serial_number + '-' + str(uni_port.mac_bridge_port_num)
        self.log.debug('ofp_port_name', port_no=port_no, name=name)

        return PortCapability(
            port=LogicalPort(
                ofp_port=ofp_port(
                    name=name,
                    hw_addr=hw_addr,
                    config=0,
                    state=OFPPS_LIVE,
                    curr=cap,
                    advertised=cap,
                    peer=cap,
                    curr_speed=OFPPF_1GB_FD,
                    max_speed=OFPPF_1GB_FD
                ),
                device_id=device.id,
                device_port_no=port_no
            )
        )

    # Called once when the adapter creates the device/onu instance
    @inlineCallbacks
    def activate(self, device):
        self.log.debug('function-entry', device=device)

        assert device.parent_id
        assert device.parent_port_no
        assert device.proxy_address.device_id

        self.proxy_address = device.proxy_address
        self.parent_id = device.parent_id
        self._pon_port_number = device.parent_port_no
        if self.enabled is not True:
            self.log.info('activating-new-onu')
            # populate what we know.  rest comes later after mib sync
            device.root = False
            device.vendor = 'OpenONU'
            device.reason = 'activating-onu'

            # TODO NEW CORE:  Need to either get logical device id from core or use regular device id
            # pm_metrics requires a logical device id.  For now set to just device_id
            self.logical_device_id = self.device_id

            yield self.core_proxy.device_update(device)
            self.log.debug('device updated', device=device)

            yield self._init_pon_state()

            self.log.debug('pon state initialized', device=device)
            ############################################################################
            # Setup Alarm handler
            self.events = AdapterEvents(self.core_proxy, device.id, self.logical_device_id,
                                        device.serial_number)
            ############################################################################
            # Setup PM configuration for this device
            # Pass in ONU specific options
            kwargs = {
                OnuPmMetrics.DEFAULT_FREQUENCY_KEY: OnuPmMetrics.DEFAULT_ONU_COLLECTION_FREQUENCY,
                'heartbeat': self.heartbeat,
                OnuOmciPmMetrics.OMCI_DEV_KEY: self._onu_omci_device
            }
            self.log.debug('create-OnuPmMetrics', serial_number=device.serial_number)
            self.pm_metrics = OnuPmMetrics(self.events, self.core_proxy, self.device_id,
                                           self.logical_device_id, device.serial_number,
                                           grouped=True, freq_override=False, **kwargs)
            pm_config = self.pm_metrics.make_proto()
            self._onu_omci_device.set_pm_config(self.pm_metrics.omci_pm.openomci_interval_pm)
            self.log.info("initial-pm-config", pm_config=pm_config)
            yield self.core_proxy.device_pm_config_update(pm_config, init=True)

            # Note, ONU ID and UNI intf set in add_uni_port method
            self._onu_omci_device.alarm_synchronizer.set_alarm_params(mgr=self.events,
                                                                      ani_ports=[self._pon])

            #Start collecting stats from the device after a brief pause
            reactor.callLater(10, self.pm_metrics.start_collector)

            # Code to Run OMCI Test Action
            kwargs_omci_test_action = {
                OmciTestRequest.DEFAULT_FREQUENCY_KEY:
                    OmciTestRequest.DEFAULT_COLLECTION_FREQUENCY
            }
            serial_number = device.serial_number
            test_request = OmciTestRequest(self.core_proxy,
                                           self.omci_agent, self.device_id,
                                           AniG, serial_number,
                                           self.logical_device_id,
                                           exclusive=False,
                                           **kwargs_omci_test_action)
            reactor.callLater(60, test_request.start_collector)
            self.enabled = True
        else:
            self.log.info('onu-already-activated')

    # Called once when the adapter needs to re-create device.  usually on vcore restart
    @inlineCallbacks
    def reconcile(self, device):
        self.log.debug('function-entry', device=device)

        # first we verify that we got parent reference and proxy info
        assert device.parent_id
        assert device.proxy_address.device_id

        self.proxy_address = device.proxy_address
        self.parent_id = device.parent_id
        self._pon_port_number = device.parent_port_no

        if self.enabled is not True:
            self.log.info('reconciling-broadcom-onu-device')
            self.logical_device_id = self.device_id
            self._init_pon_state()

            # need to restart state machines on vcore restart.  there is no indication to do it for us.
            self._onu_omci_device.start()
            yield self.core_proxy.device_reason_update(self.device_id, "restarting-openomci")

            # TODO: this is probably a bit heavy handed
            # Force a reboot for now.  We need indications to reflow to reassign tconts and gems given vcore went away
            # This may not be necessary when mib resync actually works
            reactor.callLater(1, self.reboot)

            self.enabled = True
        else:
            self.log.info('onu-already-activated')

    @inlineCallbacks
    def _init_pon_state(self):
        self.log.debug('function-entry', deviceId=self.device_id)

        self._pon = PonPort.create(self, self._pon_port_number)
        self._pon.add_peer(self.parent_id, self._pon_port_number)
        self.log.debug('adding-pon-port-to-agent', pon=self._pon.get_port())

        yield self.core_proxy.port_created(self.device_id, self._pon.get_port())

        self.log.debug('added-pon-port-to-agent', pon=self._pon.get_port())

        # Create and start the OpenOMCI ONU Device Entry for this ONU
        self._onu_omci_device = self.omci_agent.add_device(self.device_id,
                                                           self.core_proxy,
                                                           self.adapter_proxy,
                                                           support_classes=self.adapter.broadcom_omci,
                                                           custom_me_map=self.adapter.custom_me_entities())
        # Port startup
        if self._pon is not None:
            self._pon.enabled = True

    def delete(self, device):
        self.log.info('delete-onu', device=device)
        if self.parent_adapter:
            try:
                self.parent_adapter.delete_child_device(self.parent_id, device)
            except AttributeError:
                self.log.debug('parent-device-delete-child-not-implemented')
        else:
            self.log.debug("parent-adapter-not-available")

    def _create_tconts(self, uni_id, us_scheduler):
        alloc_id = us_scheduler['alloc_id']
        q_sched_policy = us_scheduler['q_sched_policy']
        self.log.debug('create-tcont', us_scheduler=us_scheduler)

        tcontdict = dict()
        tcontdict['alloc-id'] = alloc_id
        tcontdict['q_sched_policy'] = q_sched_policy
        tcontdict['uni_id'] = uni_id

        # TODO: Not sure what to do with any of this...
        tddata = dict()
        tddata['name'] = 'not-sure-td-profile'
        tddata['fixed-bandwidth'] = "not-sure-fixed"
        tddata['assured-bandwidth'] = "not-sure-assured"
        tddata['maximum-bandwidth'] = "not-sure-max"
        tddata['additional-bw-eligibility-indicator'] = "not-sure-additional"

        td = OnuTrafficDescriptor.create(tddata)
        tcont = OnuTCont.create(self, tcont=tcontdict, td=td)

        self._pon.add_tcont(tcont)

        self.log.debug('pon-add-tcont', tcont=tcont)

    # Called when there is an olt up indication, providing the gem port id chosen by the olt handler
    def _create_gemports(self, uni_id, gem_ports, alloc_id_ref, direction):
        self.log.debug('create-gemport',
                       gem_ports=gem_ports, direction=direction)

        for gem_port in gem_ports:
            gemdict = dict()
            gemdict['gemport_id'] = gem_port['gemport_id']
            gemdict['direction'] = direction
            gemdict['alloc_id_ref'] = alloc_id_ref
            gemdict['encryption'] = gem_port['aes_encryption']
            gemdict['discard_config'] = dict()
            gemdict['discard_config']['max_probability'] = \
                gem_port['discard_config']['max_probability']
            gemdict['discard_config']['max_threshold'] = \
                gem_port['discard_config']['max_threshold']
            gemdict['discard_config']['min_threshold'] = \
                gem_port['discard_config']['min_threshold']
            gemdict['discard_policy'] = gem_port['discard_policy']
            gemdict['max_q_size'] = gem_port['max_q_size']
            gemdict['pbit_map'] = gem_port['pbit_map']
            gemdict['priority_q'] = gem_port['priority_q']
            gemdict['scheduling_policy'] = gem_port['scheduling_policy']
            gemdict['weight'] = gem_port['weight']
            gemdict['uni_id'] = uni_id

            gem_port = OnuGemPort.create(self, gem_port=gemdict)

            self._pon.add_gem_port(gem_port)

            self.log.debug('pon-add-gemport', gem_port=gem_port)

    def _execute_queued_vlan_filter_tasks(self, uni_id):
        # During OLT Reboots, ONU Reboots, ONU Disable/Enable, it is seen that vlan_filter
        # task is scheduled even before tp task. So we queue vlan-filter task if tp_task
        # or initial-mib-download is not done. Once the tp_task is completed, we execute
        # such queued vlan-filter tasks
        try:
            if uni_id in self._queued_vlan_filter_task:
                self.log.info("executing-queued-vlan-filter-task",
                              uni_id=uni_id)
                filter_info = self._queued_vlan_filter_task[uni_id]
                reactor.callLater(0, self._add_vlan_filter_task, filter_info.get("device"),
                                  uni_id, filter_info.get("uni_port"), filter_info.get("set_vlan_vid"))
                # Now remove the entry from the dictionary
                self._queued_vlan_filter_task[uni_id].clear()
                self.log.debug("executed-queued-vlan-filter-task",
                               uni_id=uni_id)
        except Exception as e:
            self.log.error("vlan-filter-configuration-failed", uni_id=uni_id, error=e)


    def _do_tech_profile_configuration(self, uni_id, tp):
        num_of_tconts = tp['num_of_tconts']
        us_scheduler = tp['us_scheduler']
        alloc_id = us_scheduler['alloc_id']
        self._create_tconts(uni_id, us_scheduler)
        upstream_gem_port_attribute_list = tp['upstream_gem_port_attribute_list']
        self._create_gemports(uni_id, upstream_gem_port_attribute_list, alloc_id, "UPSTREAM")
        downstream_gem_port_attribute_list = tp['downstream_gem_port_attribute_list']
        self._create_gemports(uni_id, downstream_gem_port_attribute_list, alloc_id, "DOWNSTREAM")

    def load_and_configure_tech_profile(self, uni_id, tp_path):
        self.log.debug("loading-tech-profile-configuration", uni_id=uni_id, tp_path=tp_path)

        if uni_id not in self._tp_service_specific_task:
            self._tp_service_specific_task[uni_id] = dict()

        if uni_id not in self._tech_profile_download_done:
            self._tech_profile_download_done[uni_id] = dict()

        if tp_path not in self._tech_profile_download_done[uni_id]:
            self._tech_profile_download_done[uni_id][tp_path] = False

        if not self._tech_profile_download_done[uni_id][tp_path]:
            try:
                if tp_path in self._tp_service_specific_task[uni_id]:
                    self.log.info("tech-profile-config-already-in-progress",
                                   tp_path=tp_path)
                    return

                tp = self.kv_client[tp_path]
                tp = ast.literal_eval(tp)
                self.log.debug("tp-instance", tp=tp)
                self._do_tech_profile_configuration(uni_id, tp)

                @inlineCallbacks
                def success(_results):
                    self.log.info("tech-profile-config-done-successfully")
                    yield self.core_proxy.device_reason_update(self.device_id, 'tech-profile-config-download-success')
                    if tp_path in self._tp_service_specific_task[uni_id]:
                        del self._tp_service_specific_task[uni_id][tp_path]
                    self._tech_profile_download_done[uni_id][tp_path] = True
                    # Now execute any vlan filter tasks that were queued for later
                    self._execute_queued_vlan_filter_tasks(uni_id)
                @inlineCallbacks
                def failure(_reason):
                    self.log.warn('tech-profile-config-failure-retrying',
                                   _reason=_reason)
                    yield self.core_proxy.device_reason_update(self.device_id, 'tech-profile-config-download-failure-retrying')
                    if tp_path in self._tp_service_specific_task[uni_id]:
                        del self._tp_service_specific_task[uni_id][tp_path]
                    self._deferred = reactor.callLater(_STARTUP_RETRY_WAIT, self.load_and_configure_tech_profile,
                                                       uni_id, tp_path)

                self.log.info('downloading-tech-profile-configuration')
                self._tp_service_specific_task[uni_id][tp_path] = \
                       BrcmTpServiceSpecificTask(self.omci_agent, self, uni_id)
                self._deferred = \
                       self._onu_omci_device.task_runner.queue_task(self._tp_service_specific_task[uni_id][tp_path])
                self._deferred.addCallbacks(success, failure)

            except Exception as e:
                self.log.exception("error-loading-tech-profile", e=e)
        else:
            self.log.info("tech-profile-config-already-done")

    def update_pm_config(self, device, pm_config):
        # TODO: This has not been tested
        self.log.info('update_pm_config', pm_config=pm_config)
        self.pm_metrics.update(pm_config)

    # Calling this assumes the onu is active/ready and had at least an initial mib downloaded.   This gets called from
    # flow decomposition that ultimately comes from onos
    def update_flow_table(self, device, flows):
        self.log.debug('function-entry', device=device, flows=flows)

        #
        # We need to proxy through the OLT to get to the ONU
        # Configuration from here should be using OMCI
        #
        # self.log.info('bulk-flow-update', device_id=device.id, flows=flows)

        # no point in pushing omci flows if the device isnt reachable
        if device.connect_status != ConnectStatus.REACHABLE or \
           device.admin_state != AdminState.ENABLED:
            self.log.warn("device-disabled-or-offline-skipping-flow-update",
                          admin=device.admin_state, connect=device.connect_status)
            return

        def is_downstream(port):
            return port == self._pon_port_number

        def is_upstream(port):
            return not is_downstream(port)

        for flow in flows:
            _type = None
            _port = None
            _vlan_vid = None
            _udp_dst = None
            _udp_src = None
            _ipv4_dst = None
            _ipv4_src = None
            _metadata = None
            _output = None
            _push_tpid = None
            _field = None
            _set_vlan_vid = None
            _tunnel_id = None

            self.log.debug('bulk-flow-update', device_id=device.id, flow=flow)
            try:
                _in_port = fd.get_in_port(flow)
                assert _in_port is not None

                _out_port = fd.get_out_port(flow)  # may be None

                if is_downstream(_in_port):
                    self.log.debug('downstream-flow', in_port=_in_port, out_port=_out_port)
                    uni_port = self.uni_port(_out_port)
                    uni_id = _out_port  & 0xF
                elif is_upstream(_in_port):
                    self.log.debug('upstream-flow', in_port=_in_port, out_port=_out_port)
                    uni_port = self.uni_port(_in_port)
                    uni_id = _in_port & 0xF
                else:
                    raise Exception('port should be 1 or 2 by our convention')

                self.log.debug('flow-ports', in_port=_in_port, out_port=_out_port, uni_port=str(uni_port))

                for field in fd.get_ofb_fields(flow):
                    if field.type == fd.ETH_TYPE:
                        _type = field.eth_type
                        self.log.debug('field-type-eth-type',
                                       eth_type=_type)

                    elif field.type == fd.IP_PROTO:
                        _proto = field.ip_proto
                        self.log.debug('field-type-ip-proto',
                                       ip_proto=_proto)

                    elif field.type == fd.IN_PORT:
                        _port = field.port
                        self.log.debug('field-type-in-port',
                                       in_port=_port)

                    elif field.type == fd.VLAN_VID:
                        _vlan_vid = field.vlan_vid & 0xfff
                        self.log.debug('field-type-vlan-vid',
                                       vlan=_vlan_vid)

                    elif field.type == fd.VLAN_PCP:
                        _vlan_pcp = field.vlan_pcp
                        self.log.debug('field-type-vlan-pcp',
                                       pcp=_vlan_pcp)

                    elif field.type == fd.UDP_DST:
                        _udp_dst = field.udp_dst
                        self.log.debug('field-type-udp-dst',
                                       udp_dst=_udp_dst)

                    elif field.type == fd.UDP_SRC:
                        _udp_src = field.udp_src
                        self.log.debug('field-type-udp-src',
                                       udp_src=_udp_src)

                    elif field.type == fd.IPV4_DST:
                        _ipv4_dst = field.ipv4_dst
                        self.log.debug('field-type-ipv4-dst',
                                       ipv4_dst=_ipv4_dst)

                    elif field.type == fd.IPV4_SRC:
                        _ipv4_src = field.ipv4_src
                        self.log.debug('field-type-ipv4-src',
                                       ipv4_dst=_ipv4_src)

                    elif field.type == fd.METADATA:
                        _metadata = field.table_metadata
                        self.log.debug('field-type-metadata',
                                       metadata=_metadata)

                    elif field.type == fd.TUNNEL_ID:
                        _tunnel_id = field.tunnel_id
                        self.log.debug('field-type-tunnel-id',
                                       tunnel_id=_tunnel_id)

                    else:
                        raise NotImplementedError('field.type={}'.format(
                            field.type))

                for action in fd.get_actions(flow):

                    if action.type == fd.OUTPUT:
                        _output = action.output.port
                        self.log.debug('action-type-output',
                                       output=_output, in_port=_in_port)

                    elif action.type == fd.POP_VLAN:
                        self.log.debug('action-type-pop-vlan',
                                       in_port=_in_port)

                    elif action.type == fd.PUSH_VLAN:
                        _push_tpid = action.push.ethertype
                        self.log.debug('action-type-push-vlan',
                                       push_tpid=_push_tpid, in_port=_in_port)
                        if action.push.ethertype != 0x8100:
                            self.log.error('unhandled-tpid',
                                           ethertype=action.push.ethertype)

                    elif action.type == fd.SET_FIELD:
                        _field = action.set_field.field.ofb_field
                        assert (action.set_field.field.oxm_class ==
                                OFPXMC_OPENFLOW_BASIC)
                        self.log.debug('action-type-set-field',
                                       field=_field, in_port=_in_port)
                        if _field.type == fd.VLAN_VID:
                            _set_vlan_vid = _field.vlan_vid & 0xfff
                            self.log.debug('set-field-type-vlan-vid',
                                           vlan_vid=_set_vlan_vid)
                        else:
                            self.log.error('unsupported-action-set-field-type',
                                           field_type=_field.type)
                    else:
                        self.log.error('unsupported-action-type',
                                       action_type=action.type, in_port=_in_port)

                # OMCI set vlan task can only filter and set on vlan header attributes.  Any other openflow
                # supported match and action criteria cannot be handled by omci and must be ignored.
                if _set_vlan_vid is None or _set_vlan_vid == 0:
                    self.log.warn('ignoring-flow-that-does-not-set-vlanid')
                else:
                    self.log.info('set-vlanid', uni_id=uni_id, uni_port=uni_port, set_vlan_vid=_set_vlan_vid)
                    self._add_vlan_filter_task(device, uni_id, uni_port, _set_vlan_vid)
            except Exception as e:
                self.log.exception('failed-to-install-flow', e=e, flow=flow)


    def _add_vlan_filter_task(self, device,uni_id, uni_port, _set_vlan_vid):
        assert uni_port is not None
        if uni_id in self._tech_profile_download_done and self._tech_profile_download_done[uni_id] != {}:
            @inlineCallbacks
            def success(_results):
                self.log.info('vlan-tagging-success', uni_port=uni_port, vlan=_set_vlan_vid)
                yield self.core_proxy.device_reason_update(self.device_id, 'omci-flows-pushed')
                self._vlan_filter_task = None

            @inlineCallbacks
            def failure(_reason):
                self.log.warn('vlan-tagging-failure', uni_port=uni_port, vlan=_set_vlan_vid)
                yield self.core_proxy.device_reason_update(self.device_id, 'omci-flows-failed-retrying')
                self._vlan_filter_task = reactor.callLater(_STARTUP_RETRY_WAIT,
                                                       self._add_vlan_filter_task, device,uni_port.port_number, uni_port, _set_vlan_vid)

            self.log.info('setting-vlan-tag')
            self._vlan_filter_task = BrcmVlanFilterTask(self.omci_agent, self, uni_port, _set_vlan_vid)
            self._deferred = self._onu_omci_device.task_runner.queue_task(self._vlan_filter_task)
            self._deferred.addCallbacks(success, failure)
        else:
            self.log.info('tp-service-specific-task-not-done-adding-request-to-local-cache',
                          uni_id=uni_id)
            self._queued_vlan_filter_task[uni_id] = {"device": device,
                                                     "uni_id":uni_id,
                                                     "uni_port": uni_port,
                                                     "set_vlan_vid": _set_vlan_vid}

    def get_tx_id(self):
        self.log.debug('function-entry')
        self.tx_id += 1
        return self.tx_id

    def process_inter_adapter_message(self, request):
        self.log.debug('process-inter-adapter-message', msg=request)
        try:
            if request.header.type == InterAdapterMessageType.OMCI_REQUEST:
                omci_msg = InterAdapterOmciMessage()
                request.body.Unpack(omci_msg)
                self.log.debug('inter-adapter-recv-omci', omci_msg=omci_msg)

                self.receive_message(omci_msg.message)

            elif request.header.type == InterAdapterMessageType.ONU_IND_REQUEST:
                onu_indication = OnuIndication()
                request.body.Unpack(onu_indication)
                self.log.debug('inter-adapter-recv-onu-ind', onu_indication=onu_indication)

                if onu_indication.oper_state == "up":
                    self.create_interface(onu_indication)
                elif onu_indication.oper_state == "down":
                    self.update_interface(onu_indication)
                else:
                    self.log.error("unknown-onu-indication", onu_indication=onu_indication)

            elif request.header.type == InterAdapterMessageType.TECH_PROFILE_DOWNLOAD_REQUEST:
                tech_msg = InterAdapterTechProfileDownloadMessage()
                request.body.Unpack(tech_msg)
                self.log.debug('inter-adapter-recv-tech-profile', tech_msg=tech_msg)

                self.load_and_configure_tech_profile(tech_msg.uni_id, tech_msg.path)

            else:
                self.log.error("inter-adapter-unhandled-type", request=request)

        except Exception as e:
            self.log.exception("error-processing-inter-adapter-message", e=e)

    # Called each time there is an onu "up" indication from the olt handler
    @inlineCallbacks
    def create_interface(self, onu_indication):
        self.log.debug('function-entry', onu_indication=onu_indication)
        self._onu_indication = onu_indication

        yield self.core_proxy.device_state_update(self.device_id, oper_status=OperStatus.ACTIVATING,
                                                  connect_status=ConnectStatus.REACHABLE)

        onu_device = yield self.core_proxy.get_device(self.device_id)

        self.log.debug('starting-openomci-statemachine')
        self._subscribe_to_events()
        onu_device.reason = "starting-openomci"
        reactor.callLater(1, self._onu_omci_device.start,onu_device)
        yield self.core_proxy.device_reason_update(self.device_id, onu_device.reason)
        self._heartbeat.enabled = True

    # Currently called each time there is an onu "down" indication from the olt handler
    # TODO: possibly other reasons to "update" from the olt?
    @inlineCallbacks
    def update_interface(self, onu_indication):
        self.log.debug('function-entry', onu_indication=onu_indication)

        if onu_indication.oper_state == 'down':
            self.log.debug('stopping-openomci-statemachine')
            reactor.callLater(0, self._onu_omci_device.stop)

            # Let TP download happen again
            for uni_id in self._tp_service_specific_task:
                self._tp_service_specific_task[uni_id].clear()
            for uni_id in self._tech_profile_download_done:
                self._tech_profile_download_done[uni_id].clear()

            self.disable_ports()
            yield self.core_proxy.device_reason_update(self.device_id, "stopping-openomci")
            yield self.core_proxy.device_state_update(self.device_id, oper_status=OperStatus.DISCOVERED,
                                                      connect_status=ConnectStatus.UNREACHABLE)
        else:
            self.log.debug('not-changing-openomci-statemachine')

    # Not currently called by olt or anything else
    @inlineCallbacks
    def remove_interface(self, data):
        self.log.debug('function-entry', data=data)

        self.log.debug('stopping-openomci-statemachine')
        reactor.callLater(0, self._onu_omci_device.stop)

        # Let TP download happen again
        for uni_id in self._tp_service_specific_task:
            self._tp_service_specific_task[uni_id].clear()
        for uni_id in self._tech_profile_download_done:
            self._tech_profile_download_done[uni_id].clear()

        self.disable_ports()
        yield self.core_proxy.device_reason_update(self.device_id, "stopping-openomci")

        # TODO: im sure there is more to do here

    # Not currently called.  Would be called presumably from the olt handler
    @inlineCallbacks
    def remove_gemport(self, data):
        self.log.debug('remove-gemport', data=data)
        device = yield self.core_proxy.get_device(self.device_id)
        if device.connect_status != ConnectStatus.REACHABLE:
            self.log.error('device-unreachable')
            return

    # Not currently called.  Would be called presumably from the olt handler
    @inlineCallbacks
    def remove_tcont(self, tcont_data, traffic_descriptor_data):
        self.log.debug('remove-tcont', tcont_data=tcont_data, traffic_descriptor_data=traffic_descriptor_data)
        device = yield self.core_proxy.get_device(self.device_id)
        if device.connect_status != ConnectStatus.REACHABLE:
            self.log.error('device-unreachable')
            return

        # TODO: Create some omci task that encompases this what intended

    # Not currently called.  Would be called presumably from the olt handler
    def create_multicast_gemport(self, data):
        self.log.debug('function-entry', data=data)

        # TODO: create objects and populate for later omci calls

    def disable(self, device):
        self.log.debug('function-entry', device=device)
        try:
            self.log.info('sending-uni-lock-towards-device', device=device)

            @inlineCallbacks
            def stop_anyway(reason):
                # proceed with disable regardless if we could reach the onu. for example onu is unplugged
                self.log.debug('stopping-openomci-statemachine')
                reactor.callLater(0, self._onu_omci_device.stop)

                # Let TP download happen again
                for uni_id in self._tp_service_specific_task:
                    self._tp_service_specific_task[uni_id].clear()
                for uni_id in self._tech_profile_download_done:
                    self._tech_profile_download_done[uni_id].clear()

                self.disable_ports()
                device.oper_status = OperStatus.UNKNOWN
                device.reason = "omci-admin-lock"
                yield self.core_proxy.device_update(device)

            # lock all the unis
            task = BrcmUniLockTask(self.omci_agent, self.device_id, lock=True)
            self._deferred = self._onu_omci_device.task_runner.queue_task(task)
            self._deferred.addCallbacks(stop_anyway, stop_anyway)
        except Exception as e:
            log.exception('exception-in-onu-disable', exception=e)

    @inlineCallbacks
    def reenable(self, device):
        self.log.debug('function-entry', device=device)
        try:
            # Start up OpenOMCI state machines for this device
            # this will ultimately resync mib and unlock unis on successful redownloading the mib
            self.log.debug('restarting-openomci-statemachine')
            self._subscribe_to_events()
            yield self.core_proxy.device_reason_update(self.device_id, "restarting-openomci")
            reactor.callLater(1, self._onu_omci_device.start, device)
            self._heartbeat.enabled = True
        except Exception as e:
            log.exception('exception-in-onu-reenable', exception=e)

    @inlineCallbacks
    def reboot(self):
        self.log.info('reboot-device')
        device = yield self.core_proxy.get_device(self.device_id)
        if device.connect_status != ConnectStatus.REACHABLE:
            self.log.error("device-unreachable")
            return

        @inlineCallbacks
        def success(_results):
            self.log.info('reboot-success', _results=_results)
            self.disable_ports()
            device.connect_status = ConnectStatus.UNREACHABLE
            device.oper_status = OperStatus.DISCOVERED
            device.reason = "rebooting"
            yield self.core_proxy.device_update(device)

        def failure(_reason):
            self.log.info('reboot-failure', _reason=_reason)

        self._deferred = self._onu_omci_device.reboot()
        self._deferred.addCallbacks(success, failure)

    @inlineCallbacks
    def disable_ports(self):
        self.log.info('disable-ports', device_id=self.device_id)

        # Disable all ports on that device
        yield self.core_proxy.ports_state_update(self.device_id, OperStatus.UNKNOWN)

    @inlineCallbacks
    def enable_ports(self):
        self.log.info('enable-ports', device_id=self.device_id)

        # Enable all ports on that device
        yield self.core_proxy.ports_state_update(self.device_id, OperStatus.ACTIVE)

    # Called just before openomci state machine is started.  These listen for events from selected state machines,
    # most importantly, mib in sync.  Which ultimately leads to downloading the mib
    def _subscribe_to_events(self):
        self.log.debug('function-entry')

        # OMCI MIB Database sync status
        bus = self._onu_omci_device.event_bus
        topic = OnuDeviceEntry.event_bus_topic(self.device_id,
                                               OnuDeviceEvents.MibDatabaseSyncEvent)
        self._in_sync_subscription = bus.subscribe(topic, self.in_sync_handler)

        # OMCI Capabilities
        bus = self._onu_omci_device.event_bus
        topic = OnuDeviceEntry.event_bus_topic(self.device_id,
                                               OnuDeviceEvents.OmciCapabilitiesEvent)
        self._capabilities_subscription = bus.subscribe(topic, self.capabilties_handler)

    # Called when the mib is in sync
    def in_sync_handler(self, _topic, msg):
        self.log.debug('function-entry', _topic=_topic, msg=msg)
        if self._in_sync_subscription is not None:
            try:
                in_sync = msg[IN_SYNC_KEY]

                if in_sync:
                    # Only call this once
                    bus = self._onu_omci_device.event_bus
                    bus.unsubscribe(self._in_sync_subscription)
                    self._in_sync_subscription = None

                    # Start up device_info load
                    self.log.debug('running-mib-sync')
                    reactor.callLater(0, self._mib_in_sync)

            except Exception as e:
                self.log.exception('in-sync', e=e)

    def capabilties_handler(self, _topic, _msg):
        self.log.debug('function-entry', _topic=_topic, msg=_msg)
        if self._capabilities_subscription is not None:
            self.log.debug('capabilities-handler-done')

    # Mib is in sync, we can now query what we learned and actually start pushing ME (download) to the ONU.
    # Currently uses a basic mib download task that create a bridge with a single gem port and uni, only allowing EAP
    # Implement your own MibDownloadTask if you wish to setup something different by default
    @inlineCallbacks
    def _mib_in_sync(self):
        self.log.debug('function-entry')

        omci = self._onu_omci_device
        in_sync = omci.mib_db_in_sync

        device = yield self.core_proxy.get_device(self.device_id)
        yield self.core_proxy.device_reason_update(self.device_id, 'discovery-mibsync-complete')

        if not self._dev_info_loaded:
            self.log.info('loading-device-data-from-mib', in_sync=in_sync, already_loaded=self._dev_info_loaded)

            omci_dev = self._onu_omci_device
            config = omci_dev.configuration

            # TODO: run this sooner somehow. shouldnt have to wait for mib sync to push an initial download
            # In Sync, we can register logical ports now. Ideally this could occur on
            # the first time we received a successful (no timeout) OMCI Rx response.
            try:

                # sort the lists so we get consistent port ordering.
                ani_list = sorted(config.ani_g_entities) if config.ani_g_entities else []
                uni_list = sorted(config.uni_g_entities) if config.uni_g_entities else []
                pptp_list = sorted(config.pptp_entities) if config.pptp_entities else []
                veip_list = sorted(config.veip_entities) if config.veip_entities else []

                if ani_list is None or (pptp_list is None and veip_list is None):
                    self.log.warn("no-ani-or-unis")
                    yield self.core_proxy.device_reason_update(self.device_id, 'onu-missing-required-elements')
                    raise Exception("onu-missing-required-elements")

                # Currently logging the ani, pptp, veip, and uni for information purposes.
                # Actually act on the veip/pptp as its ME is the most correct one to use in later tasks.
                # And in some ONU the UNI-G list is incomplete or incorrect...
                for entity_id in ani_list:
                    ani_value = config.ani_g_entities[entity_id]
                    self.log.debug("discovered-ani", entity_id=entity_id, value=ani_value)
                    # TODO: currently only one OLT PON port/ANI, so this works out.  With NGPON there will be 2..?
                    self._total_tcont_count = ani_value.get('total-tcont-count')
                    self.log.debug("set-total-tcont-count", tcont_count=self._total_tcont_count)

                for entity_id in uni_list:
                    uni_value = config.uni_g_entities[entity_id]
                    self.log.debug("discovered-uni", entity_id=entity_id, value=uni_value)

                uni_entities = OrderedDict()
                for entity_id in pptp_list:
                    pptp_value = config.pptp_entities[entity_id]
                    self.log.debug("discovered-pptp", entity_id=entity_id, value=pptp_value)
                    uni_entities[entity_id] = UniType.PPTP

                for entity_id in veip_list:
                    veip_value = config.veip_entities[entity_id]
                    self.log.debug("discovered-veip", entity_id=entity_id, value=veip_value)
                    uni_entities[entity_id] = UniType.VEIP

                uni_id = 0
                for entity_id, uni_type in uni_entities.iteritems():
                    try:
                        yield self._add_uni_port(device, entity_id, uni_id, uni_type)
                        uni_id += 1
                    except AssertionError as e:
                        self.log.warn("could not add UNI", entity_id=entity_id, uni_type=uni_type, e=e)

                self._qos_flexibility = config.qos_configuration_flexibility or 0
                self._omcc_version = config.omcc_version or OMCCVersion.Unknown

                if self._unis:
                    self._dev_info_loaded = True
                else:
                    yield self.core_proxy.device_reason_update(self.device_id, 'no-usable-unis')
                    self.log.warn("no-usable-unis")
                    raise Exception("no-usable-unis")

            except Exception as e:
                self.log.exception('device-info-load', e=e)
                self._deferred = reactor.callLater(_STARTUP_RETRY_WAIT, self._mib_in_sync)

        else:
            self.log.info('device-info-already-loaded', in_sync=in_sync, already_loaded=self._dev_info_loaded)

        if self._dev_info_loaded:
            if device.admin_state == AdminState.PREPROVISIONED or device.admin_state == AdminState.ENABLED:

                @inlineCallbacks
                def success(_results):
                    self.log.info('mib-download-success', _results=_results)
                    yield self.enable_ports()
                    yield self.core_proxy.device_state_update(device.id,
                                            oper_status=OperStatus.ACTIVE, connect_status=ConnectStatus.REACHABLE)
                    yield self.core_proxy.device_reason_update(self.device_id, 'initial-mib-downloaded')
                    self._mib_download_task = None
                    yield self.onu_active_event()

                @inlineCallbacks
                def failure(_reason):
                    self.log.warn('mib-download-failure-retrying', _reason=_reason)
                    yield self.core_proxy.device_reason_update(self.device_id, 'initial-mib-download-failure-retrying')
                    self._deferred = reactor.callLater(_STARTUP_RETRY_WAIT, self._mib_in_sync)

                # Download an initial mib that creates simple bridge that can pass EAP.  On success (above) finally set
                # the device to active/reachable.   This then opens up the handler to openflow pushes from outside
                self.log.info('downloading-initial-mib-configuration')
                self._mib_download_task = BrcmMibDownloadTask(self.omci_agent, self)
                self._deferred = self._onu_omci_device.task_runner.queue_task(self._mib_download_task)
                self._deferred.addCallbacks(success, failure)
            else:
                self.log.info('admin-down-disabling')
                self.disable(device)
        else:
            self.log.info('device-info-not-loaded-skipping-mib-download')

    @inlineCallbacks
    def _add_uni_port(self, device, entity_id, uni_id, uni_type=UniType.PPTP):
        self.log.debug('function-entry')

        uni_no = self.mk_uni_port_num(self._onu_indication.intf_id, self._onu_indication.onu_id, uni_id)

        # TODO: Some or parts of this likely need to move to UniPort. especially the format stuff
        uni_name = "uni-{}".format(uni_no)

        mac_bridge_port_num = uni_id + 1 # TODO +1 is only to test non-zero index

        self.log.debug('uni-port-inputs', uni_no=uni_no, uni_id=uni_id, uni_name=uni_name, uni_type=uni_type,
                       entity_id=entity_id, mac_bridge_port_num=mac_bridge_port_num, serial_number=device.serial_number)

        uni_port = UniPort.create(self, uni_name, uni_id, uni_no, uni_name, uni_type)
        uni_port.entity_id = entity_id
        uni_port.enabled = True
        uni_port.mac_bridge_port_num = mac_bridge_port_num

        self.log.debug("created-uni-port", uni=uni_port)

        yield self.core_proxy.port_created(device.id, uni_port.get_port())

        self._unis[uni_port.port_number] = uni_port

        self._onu_omci_device.alarm_synchronizer.set_alarm_params(onu_id=self._onu_indication.onu_id,
                                                                  uni_ports=self._unis.values(), serial_number=device.serial_number)

    # TODO NEW CORE: Figure out how to gain this knowledge from the olt.  for now cheat terribly.
    def mk_uni_port_num(self, intf_id, onu_id, uni_id):
        MAX_PONS_PER_OLT = 16
        MAX_ONUS_PER_PON = 128
        MAX_UNIS_PER_ONU = 16

        assert intf_id < MAX_PONS_PER_OLT
        assert onu_id < MAX_ONUS_PER_PON
        assert uni_id < MAX_UNIS_PER_ONU
        return intf_id << 11 | onu_id << 4 | uni_id

    @inlineCallbacks
    def onu_active_event(self):
        self.log.debug('function-entry')
        try:
            device = yield self.core_proxy.get_device(self.device_id)
            parent_device = yield self.core_proxy.get_device(self.parent_id)
            olt_serial_number = parent_device.serial_number
            raised_ts = arrow.utcnow().timestamp

            self.log.debug("onu-indication-context-data",
                       pon_id=self._onu_indication.intf_id,
                       onu_id=self._onu_indication.onu_id,
                       registration_id=self.device_id,
                       device_id=self.device_id,
                       onu_serial_number=device.serial_number,
                       olt_serial_number=olt_serial_number,
                       raised_ts=raised_ts)

            self.log.debug("Trying-to-raise-onu-active-event")
            OnuActiveEvent(self.events, self.device_id,
                           self._onu_indication.intf_id,
                           device.serial_number,
                           str(self.device_id),
                           olt_serial_number,raised_ts,
                           onu_id=self._onu_indication.onu_id).send(True)
        except Exception as active_event_error:
            self.log.exception('onu-activated-event-error',
                               errmsg=active_event_error.message)