# 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 oslo_utils import timeutils

from magnum.db.sqlalchemy import models


class API(object):
    def __init__(self, conf):
        self.service_down_time = 3 * conf.periodic_interval_max

    def service_is_up(self, member):
        if not isinstance(member, models.MagnumService):
            raise TypeError
        if member.get('forced_down'):
            return False

        last_heartbeat = (member.get(
            'last_seen_up') or member['updated_at'] or member['created_at'])
        elapsed = timeutils.delta_seconds(last_heartbeat, timeutils.utcnow())
        is_up = abs(elapsed) <= self.service_down_time
        return is_up