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#    Licensed under the Apache License, Version 2.0 (the "License"); you may
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#         http://www.apache.org/licenses/LICENSE-2.0
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from rally import consts
from rally.plugins.openstack import scenario
from rally.plugins.openstack.scenarios.ceilometer import utils as ceiloutils
from rally.task import validation


class CeilometerMeters(ceiloutils.CeilometerScenario):
    """Benchmark scenarios for Ceilometer Meters API."""

    @validation.required_services(consts.Service.CEILOMETER)
    @validation.required_openstack(users=True)
    @scenario.configure()
    def list_meters(self, metadata_query=None, limit=None):
        """Check all available queries for list resource request.

        :param metadata_query: dict with metadata fields and values
        :param limit: limit of meters in response
        """

        self.list_matched_meters(filter_by_project_id=True)
        self.list_matched_meters(filter_by_user_id=True)
        self.list_matched_meters(filter_by_resource_id=True)
        if metadata_query:
            self.list_matched_meters(metadata_query=metadata_query)
        if limit:
            self.list_matched_meters(limit=limit)

    @validation.required_services(consts.Service.CEILOMETER)
    @validation.required_openstack(users=True)
    @scenario.configure()
    def list_matched_meters(self, filter_by_user_id=False,
                            filter_by_project_id=False,
                            filter_by_resource_id=False,
                            metadata_query=None,
                            limit=None):
        """Get meters that matched fields from context and args.

        :param filter_by_user_id: flag for query by user_id
        :param filter_by_project_id: flag for query by project_id
        :param filter_by_resource_id: flag for query by resource_id
        :param metadata_query: dict with metadata fields and values for query
        :param limit: count of resources in response
        """
        query = self._make_general_query(filter_by_project_id,
                                         filter_by_user_id,
                                         filter_by_resource_id,
                                         metadata_query)
        self._list_meters(query, limit)
