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

#    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 os

import unittest
import mox

from nose.plugins.attrib import attr

from heat.common import context
from heat.common import exception
from heat.common import template_format
from heat.engine import parser
from heat.engine import scheduler
from heat.engine.resources import dbinstance as dbi


@attr(tag=['unit', 'resource'])
@attr(speed='fast')
class DBInstanceTest(unittest.TestCase):
    def setUp(self):
        self.m = mox.Mox()
        self.m.StubOutWithMock(dbi.DBInstance, 'create_with_template')
        self.m.StubOutWithMock(dbi.DBInstance, 'nested')

    def tearDown(self):
        self.m.UnsetStubs()
        print "DBInstanceTest teardown complete"

    def load_template(self):
        self.path = os.path.dirname(os.path.realpath(__file__)).\
            replace('heat/tests', 'templates')
        f = open("%s/WordPress_With_RDS.template" % self.path)
        t = template_format.parse(f.read())
        f.close()
        return t

    def parse_stack(self, t):
        ctx = context.RequestContext.from_dict({
            'tenant': 'test_tenant',
            'tenant_id': '1234abcd',
            'username': 'test_username',
            'password': 'password',
            'auth_url': 'http://localhost:5000/v2.0'})
        template = parser.Template(t)
        params = parser.Parameters('test_stack', template, {'KeyName': 'test'})
        stack = parser.Stack(ctx, 'test_stack', template, params)

        return stack

    def create_dbinstance(self, t, stack, resource_name):
        resource = dbi.DBInstance(resource_name,
                                  t['Resources'][resource_name],
                                  stack)
        self.assertEqual(None, resource.validate())
        scheduler.TaskRunner(resource.create)()
        self.assertEqual(dbi.DBInstance.CREATE_COMPLETE, resource.state)
        return resource

    def test_dbinstance(self):

        class FakeDatabaseInstance:
            def _ipaddress(self):
                return '10.0.0.1'

        class FakeNested:
            resources = {'DatabaseInstance': FakeDatabaseInstance()}

        params = {
            'AllocatedStorage': u'5',
            'DBInstanceClass': u'db.m1.small',
            'DBName': u'wordpress',
            'DBSecurityGroups': '',
            'KeyName': 'test',
            'MasterUserPassword': u'admin',
            'MasterUsername': u'admin',
            'Port': '3306'
        }

        dbi.DBInstance.create_with_template(mox.IgnoreArg(),
                                            params).AndReturn(None)

        fn = FakeNested()

        dbi.DBInstance.nested().AndReturn(None)
        dbi.DBInstance.nested().MultipleTimes().AndReturn(fn)
        self.m.ReplayAll()

        t = self.load_template()
        s = self.parse_stack(t)
        resource = self.create_dbinstance(t, s, 'DatabaseServer')

        self.assertEqual('0.0.0.0', resource.FnGetAtt('Endpoint.Address'))
        self.assertEqual('10.0.0.1', resource.FnGetAtt('Endpoint.Address'))
        self.assertEqual('3306', resource.FnGetAtt('Endpoint.Port'))

        try:
            resource.FnGetAtt('foo')
        except exception.InvalidTemplateAttribute:
            pass
        else:
            raise Exception('Expected InvalidTemplateAttribute')

        self.m.VerifyAll()