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

# 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 mock

import cotyledon
from cotyledon.tests import base


class FakeService(cotyledon.Service):
    pass


class SomeTest(base.TestCase):
    def setUp(self):
        super(SomeTest, self).setUp()
        cotyledon.ServiceManager._process_runner_already_created = False

    def test_forking_slowdown(self):
        sm = cotyledon.ServiceManager()
        sm.add(FakeService, workers=3)
        with mock.patch('time.sleep') as sleep:
            sm._slowdown_respawn_if_needed()
            sm._slowdown_respawn_if_needed()
            sm._slowdown_respawn_if_needed()
            # We simulatge 3 more spawn
            sm._slowdown_respawn_if_needed()
            sm._slowdown_respawn_if_needed()
            sm._slowdown_respawn_if_needed()
            self.assertEqual(6, len(sleep.mock_calls))

    def test_invalid_service(self):
        sm = cotyledon.ServiceManager()

        self.assertRaisesMsg(
            ValueError,
            "'service' must be a callable",
            sm.add, u"foo")
        self.assertRaisesMsg(
            ValueError,
            "'workers' must be an int >= 1, not: None (NoneType)",
            sm.add, FakeService, workers=None)
        self.assertRaisesMsg(
            ValueError,
            "'workers' must be an int >= 1, not: -2 (int)",
            sm.add, FakeService, workers=-2)

        oid = sm.add(FakeService, workers=3)
        self.assertRaisesMsg(
            ValueError,
            "'workers' must be an int >= -2, not: -5 (int)",
            sm.reconfigure, oid, workers=-5)
        self.assertRaisesMsg(
            ValueError,
            "notexists service id doesn't exists",
            sm.reconfigure, "notexists", workers=-1)

    def assertRaisesMsg(self, exc, msg, func, *args, **kwargs):
        try:
            func(*args, **kwargs)
        except exc as e:
            self.assertEqual(msg, str(e))
        else:
            self.assertFalse(True, "%r have not been raised" % exc)