# vim: tabstop=4 shiftwidth=4 softtabstop=4

# Copyright 2012, Red Hat, Inc.
#
#    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.

"""
Unit Tests for heat.rpc.client
"""


import stubout
from nose.plugins.attrib import attr
import unittest

from heat.common import context
from heat.rpc import client as rpc_client
from heat.openstack.common import cfg
from heat.openstack.common import rpc


@attr(tag=['unit', 'rpcapi'])
class EngineRpcAPITestCase(unittest.TestCase):

    def setUp(self):
        self.context = context.get_admin_context()
        cfg.CONF.set_default('rpc_backend',
                             'heat.openstack.common.rpc.impl_fake')
        cfg.CONF.set_default('verbose', True)
        cfg.CONF.set_default('engine_topic', 'engine')
        cfg.CONF.set_default('host', 'host')

        self.stubs = stubout.StubOutForTesting()
        super(EngineRpcAPITestCase, self).setUp()

    def tearDown(self):
        super(EngineRpcAPITestCase, self).tearDown()

    def _test_engine_api(self, method, rpc_method, **kwargs):
        ctxt = context.RequestContext('fake_user', 'fake_project')
        if 'rpcapi_class' in kwargs:
            rpcapi_class = kwargs['rpcapi_class']
            del kwargs['rpcapi_class']
        else:
            rpcapi_class = rpc_client.EngineClient
        rpcapi = rpcapi_class()
        expected_retval = 'foo' if method == 'call' else None

        expected_version = kwargs.pop('version', rpcapi.BASE_RPC_API_VERSION)
        expected_msg = rpcapi.make_msg(method, **kwargs)

        expected_msg['version'] = expected_version
        expected_topic = '%s.%s' % (cfg.CONF.engine_topic, cfg.CONF.host)

        cast_and_call = ['delete_stack']
        if rpc_method == 'call' and method in cast_and_call:
            kwargs['cast'] = False

        self.fake_args = None
        self.fake_kwargs = None

        def _fake_rpc_method(*args, **kwargs):
            self.fake_args = args
            self.fake_kwargs = kwargs
            if expected_retval:
                return expected_retval

        self.stubs.Set(rpc, rpc_method, _fake_rpc_method)

        retval = getattr(rpcapi, method)(ctxt, **kwargs)

        self.assertEqual(retval, expected_retval)
        expected_args = [ctxt, expected_topic, expected_msg]
        for arg, expected_arg in zip(self.fake_args, expected_args):
            self.assertEqual(arg, expected_arg)

    def test_show_stack(self):
        self._test_engine_api('show_stack', 'call', stack_identity='wordpress')

    def test_create_stack(self):
        self._test_engine_api('create_stack', 'call', stack_name='wordpress',
                              template={u'Foo': u'bar'},
                              params={u'InstanceType': u'm1.xlarge'},
                              args={'timeout_mins': u'30'})

    def test_update_stack(self):
        self._test_engine_api('update_stack', 'call',
                              stack_identity='wordpress',
                              template={u'Foo': u'bar'},
                              params={u'InstanceType': u'm1.xlarge'},
                              args={})

    def test_validate_template(self):
        self._test_engine_api('validate_template', 'call',
                              template={u'Foo': u'bar'})

    def test_get_template(self):
        self._test_engine_api('get_template', 'call',
                              stack_identity='wordpress')

    def test_delete_stack_cast(self):
        self._test_engine_api('delete_stack', 'cast',
                              stack_identity='wordpress')

    def test_delete_stack_call(self):
        self._test_engine_api('delete_stack', 'call',
                              stack_identity='wordpress')

    def test_list_events(self):
        self._test_engine_api('list_events', 'call',
                              stack_identity='wordpress')

    def test_describe_stack_resource(self):
        self._test_engine_api('describe_stack_resource', 'call',
                              stack_identity='wordpress',
                              resource_name='LogicalResourceId')

    def test_describe_stack_resources(self):
        self._test_engine_api('describe_stack_resources', 'call',
                              stack_identity='wordpress',
                              physical_resource_id=u'404d-a85b-5315293e67de',
                              logical_resource_id=u'WikiDatabase')

    def test_list_stack_resources(self):
        self._test_engine_api('list_stack_resources', 'call',
                              stack_identity='wordpress')

    def test_metadata_update(self):
        self._test_engine_api('metadata_update', 'call',
                              stack_id=6,
                              resource_name='LogicalResourceId',
                              metadata={u'wordpress': []})

    def test_create_watch_data(self):
        self._test_engine_api('create_watch_data', 'call',
                              watch_name='watch1',
                              stats_data={})

    def test_show_watch(self):
        self._test_engine_api('show_watch', 'call',
                              watch_name='watch1')

    def test_show_watch_metric(self):
        self._test_engine_api('show_watch_metric', 'call',
                              namespace=None, metric_name=None)

    def test_set_watch_state(self):
        self._test_engine_api('set_watch_state', 'call',
                              watch_name='watch1', state="xyz")
