# Copyright 2021-2023 H2020 TeraFlow (https://www.teraflow-h2020.eu/)
#
# 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 typing import Any, Dict, Iterator, NamedTuple, Tuple
import grpc, logging
from common.tests.MockMessageBroker import MockMessageBroker
from common.tools.grpc.Tools import grpc_message_to_json_string
from context.proto.context_pb2 import Empty, TeraFlowController
from dlt.connector.proto.dlt_pb2 import (
    DltPeerStatus, DltPeerStatusList, DltRecord, DltRecordEvent, DltRecordId, DltRecordOperationEnum, DltRecordStatus, DltRecordSubscription, DltRecordTypeEnum)
from dlt.connector.proto.dlt_pb2_grpc import DltServiceServicer

LOGGER = logging.getLogger(__name__)

DltRecordKey  = Tuple[str, DltRecordOperationEnum, str]     # domain_uuid, operation, record_uuid
DltRecordDict = Dict[DltRecordKey, DltRecord]               # dlt_record_key => dlt_record

class MockServicerImpl_Dlt(DltServiceServicer):
    def __init__(self):
        LOGGER.info('[__init__] Creating Servicer...')
        self.records : DltRecordDict = {}
        self.msg_broker = MockMessageBroker()
        LOGGER.info('[__init__] Servicer Created')

    def RecordToDlt(self, request : DltRecord, context : grpc.ServicerContext) -> DltRecordStatus:
        LOGGER.info('[RecordToDlt] request={:s}'.format(grpc_message_to_json_string(request)))
        operation   = request.operation
        domain_uuid = request.record_id.domain_uuid
        record_uuid = request.record_id.record_uuid

        #if operation == 
        

    def GetFromDlt(self, request : DltRecordId, context : grpc.ServicerContext) -> DltRecord:
        LOGGER.info('[GetFromDlt] request={:s}'.format(grpc_message_to_json_string(request)))

    def SubscribeToDlt(self, request: DltRecordSubscription, context : grpc.ServicerContext) -> Iterator[DltRecordEvent]:
        LOGGER.info('[SubscribeToDlt] request={:s}'.format(grpc_message_to_json_string(request)))
        for message in self.msg_broker.consume({TOPIC_CONTEXT}): yield ContextEvent(**json.loads(message.content))

    def GetDltStatus(self, request : TeraFlowController, context : grpc.ServicerContext) -> DltPeerStatus:
        LOGGER.info('[GetDltStatus] request={:s}'.format(grpc_message_to_json_string(request)))

    def GetDltPeers(self, request : Empty, context : grpc.ServicerContext) -> DltPeerStatusList:
        LOGGER.info('[GetDltPeers] request={:s}'.format(grpc_message_to_json_string(request)))







        LOGGER.info('[__init__] Servicer Created')

    # ----- Common -----------------------------------------------------------------------------------------------------

    def _set(self, request, container_name, entry_uuid, entry_id_field_name, topic_name):
        exists = has_entry(self.database, container_name, entry_uuid)
        entry = set_entry(self.database, container_name, entry_uuid, request)
        event_type = EventTypeEnum.EVENTTYPE_UPDATE if exists else EventTypeEnum.EVENTTYPE_CREATE
        entry_id = getattr(entry, entry_id_field_name)
        dict_entry_id = grpc_message_to_json(entry_id)
        notify_event(self.msg_broker, topic_name, event_type, {entry_id_field_name: dict_entry_id})
        return entry_id

    def _del(self, request, container_name, entry_uuid, entry_id_field_name, topic_name, grpc_context):
        empty = del_entry(grpc_context, self.database, container_name, entry_uuid)
        event_type = EventTypeEnum.EVENTTYPE_REMOVE
        dict_entry_id = grpc_message_to_json(request)
        notify_event(self.msg_broker, topic_name, event_type, {entry_id_field_name: dict_entry_id})
        return empty

    # ----- Context ----------------------------------------------------------------------------------------------------

    def ListContextIds(self, request: Empty, context : grpc.ServicerContext) -> ContextIdList:
        LOGGER.info('[ListContextIds] request={:s}'.format(grpc_message_to_json_string(request)))
        return ContextIdList(context_ids=[context.context_id for context in get_entries(self.database, 'context')])

    def ListContexts(self, request: Empty, context : grpc.ServicerContext) -> ContextList:
        LOGGER.info('[ListContexts] request={:s}'.format(grpc_message_to_json_string(request)))
        return ContextList(contexts=get_entries(self.database, 'context'))

    def GetContext(self, request: ContextId, context : grpc.ServicerContext) -> Context:
        LOGGER.info('[GetContext] request={:s}'.format(grpc_message_to_json_string(request)))
        return get_entry(context, self.database, 'context', request.context_uuid.uuid)

    def SetContext(self, request: Context, context : grpc.ServicerContext) -> ContextId:
        LOGGER.info('[SetContext] request={:s}'.format(grpc_message_to_json_string(request)))
        return self._set(request, 'context', request.context_uuid.uuid, 'context_id', TOPIC_CONTEXT)

    def RemoveContext(self, request: ContextId, context : grpc.ServicerContext) -> Empty:
        LOGGER.info('[RemoveContext] request={:s}'.format(grpc_message_to_json_string(request)))
        return self._del(request, 'context', request.context_uuid.uuid, 'context_id', TOPIC_CONTEXT, context)

    def GetContextEvents(self, request: Empty, context : grpc.ServicerContext) -> Iterator[ContextEvent]:
        LOGGER.info('[GetContextEvents] request={:s}'.format(grpc_message_to_json_string(request)))
        for message in self.msg_broker.consume({TOPIC_CONTEXT}): yield ContextEvent(**json.loads(message.content))