# Copyright 2016 Internap.
#
# 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 pytz
import unittest
import uuid
from datetime import datetime
from hamcrest import has_entry, is_not, assert_that
from retry import retry

from builders.messages import get_instance_delete_end_sample, get_instance_create_end_sample
from helpers.almanach_helper import AlmanachHelper
from helpers.rabbit_mq_helper import RabbitMqHelper


class CollectorTestInstance(unittest.TestCase):
    def setUp(self):
        self.almanachHelper = AlmanachHelper()
        self.rabbitMqHelper = RabbitMqHelper()

    def test_when_instance_delete_received_before_create_instance(self):
        tenant_id = str(uuid.uuid4())
        instance_id = str(uuid.uuid4())

        self.rabbitMqHelper.push(
                get_instance_delete_end_sample(
                        instance_id=instance_id,
                        tenant_id=tenant_id,
                        deletion_timestamp=datetime(2016, 2, 1, 10, 0, 0, tzinfo=pytz.utc)
                ))

        self.rabbitMqHelper.push(
                get_instance_create_end_sample(
                        instance_id=instance_id,
                        tenant_id=tenant_id,
                        creation_timestamp=datetime(2016, 2, 1, 9, 0, 0, tzinfo=pytz.utc)
                ))

        self.assert_instance_delete_received_before_instance_create(tenant_id)

    @retry(exceptions=AssertionError, delay=10, max_delay=300)
    def assert_instance_delete_received_before_instance_create(self, tenant_id):
        assert_that(self.almanachHelper.get_entities(tenant_id, "2016-01-01 00:00:00.000"),
                    is_not(has_entry("end", None)))