# -*- coding: utf-8 -*-

# Copyright 2018 Whitestack, LLC
# *************************************************************

# This file is part of OSM Monitoring module
# All Rights Reserved to Whitestack, LLC

# 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.
# For those usages not covered by the Apache License, Version 2.0 please
# contact: bdiaz@whitestack.com or glavado@whitestack.com
##
import logging
import uuid

from osm_mon.core import database
from osm_mon.core.common_db import CommonDbClient
from osm_mon.core.config import Config
from osm_mon.core.database import AlarmRepository, Alarm, AlarmTagRepository

log = logging.getLogger(__name__)


class ServerService:

    def __init__(self, config: Config):
        self.common_db = CommonDbClient(config)

    def create_alarm(self,
                     name: str,
                     threshold: str,
                     operation: str,
                     severity: str,
                     statistic: str,
                     metric_name: str,
                     tags: dict) -> Alarm:
        database.db.connect()
        try:
            with database.db.atomic():
                alarm = AlarmRepository.create(
                    uuid=str(uuid.uuid4()),
                    name=name,
                    threshold=threshold,
                    operation=operation.lower(),
                    severity=severity.lower(),
                    statistic=statistic.lower(),
                    metric=metric_name
                )
                for k, v in tags.items():
                    AlarmTagRepository.create(
                        name=k,
                        value=v,
                        alarm=alarm
                    )
                return alarm

        finally:
            database.db.close()

    def delete_alarm(self,
                     alarm_uuid: str) -> None:
        database.db.connect()
        try:
            with database.db.atomic():
                alarm = AlarmRepository.get(Alarm.uuid == alarm_uuid)
                alarm.delete_instance()
        finally:
            database.db.close()