# -*- encoding: utf-8 -*-
# Copyright 2017 NEC Corporation
#
# 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.

import abc


class DataSourceBase(object):

    METRIC_MAP = dict(host_cpu_usage=None,
                      instance_cpu_usage=None,
                      instance_l3_cache_usage=None,
                      host_outlet_temp=None,
                      host_airflow=None,
                      host_inlet_temp=None,
                      host_power=None,
                      instance_ram_usage=None,
                      instance_ram_allocated=None,
                      instance_root_disk_size=None,
                      host_memory_usage=None
                      )

    @abc.abstractmethod
    def statistic_aggregation(self, resource_id=None, meter_name=None,
                              period=300, granularity=300, dimensions=None,
                              aggregation='avg', group_by='*'):
        pass

    @abc.abstractmethod
    def list_metrics(self):
        pass

    @abc.abstractmethod
    def check_availability(self):
        pass

    @abc.abstractmethod
    def get_host_cpu_usage(self, resource_id, period, aggregate,
                           granularity=None):
        pass

    @abc.abstractmethod
    def get_instance_cpu_usage(self, resource_id, period, aggregate,
                               granularity=None):
        pass

    @abc.abstractmethod
    def get_host_memory_usage(self, resource_id, period, aggregate,
                              granularity=None):
        pass

    @abc.abstractmethod
    def get_instance_memory_usage(self, resource_id, period, aggregate,
                                  granularity=None):
        pass

    @abc.abstractmethod
    def get_instance_l3_cache_usage(self, resource_id, period, aggregate,
                                    granularity=None):
        pass

    @abc.abstractmethod
    def get_instance_ram_allocated(self, resource_id, period, aggregate,
                                   granularity=None):
        pass

    @abc.abstractmethod
    def get_instance_root_disk_allocated(self, resource_id, period, aggregate,
                                         granularity=None):
        pass

    @abc.abstractmethod
    def get_host_outlet_temperature(self, resource_id, period, aggregate,
                                    granularity=None):
        pass

    @abc.abstractmethod
    def get_host_inlet_temperature(self, resource_id, period, aggregate,
                                   granularity=None):
        pass

    @abc.abstractmethod
    def get_host_airflow(self, resource_id, period, aggregate,
                         granularity=None):
        pass

    @abc.abstractmethod
    def get_host_power(self, resource_id, period, aggregate, granularity=None):
        pass
