# Copyright 2016 Amazon.com, Inc. or its affiliates. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"). You
# may not use this file except in compliance with the License. A copy of
# the License is located at
#
# http://aws.amazon.com/apache2.0/
#
# or in the "license" file accompanying this file. This file 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
from contextlib import contextmanager

import botocore.session
from tests import BaseSessionTest, ClientHTTPStubber
from botocore.stub import Stubber
from tests import unittest


class TestRDSPresignUrlInjection(BaseSessionTest):

    def setUp(self):
        super(TestRDSPresignUrlInjection, self).setUp()
        self.client = self.session.create_client('rds', 'us-west-2')
        self.http_stubber = ClientHTTPStubber(self.client)

    def assert_presigned_url_injected_in_request(self, body):
        self.assertIn('PreSignedUrl', body)
        self.assertNotIn('SourceRegion', body)

    def test_copy_snapshot(self):
        params = {
            'SourceDBSnapshotIdentifier': 'source-db',
            'TargetDBSnapshotIdentifier': 'target-db',
            'SourceRegion': 'us-east-1'
        }
        response_body = (
                    b'<CopyDBSnapshotResponse>'
                    b'<CopyDBSnapshotResult></CopyDBSnapshotResult>'
                    b'</CopyDBSnapshotResponse>'
        )
        self.http_stubber.add_response(body=response_body)
        with self.http_stubber:
            self.client.copy_db_snapshot(**params)
            sent_request = self.http_stubber.requests[0]
            self.assert_presigned_url_injected_in_request(sent_request.body)

    def test_create_db_instance_read_replica(self):
        params = {
            'SourceDBInstanceIdentifier': 'source-db',
            'DBInstanceIdentifier': 'target-db',
            'SourceRegion': 'us-east-1'
        }
        response_body = (
            b'<CreateDBInstanceReadReplicaResponse>'
            b'<CreateDBInstanceReadReplicaResult>'
            b'</CreateDBInstanceReadReplicaResult>'
            b'</CreateDBInstanceReadReplicaResponse>'
        )
        self.http_stubber.add_response(body=response_body)
        with self.http_stubber:
            self.client.create_db_instance_read_replica(**params)
            sent_request = self.http_stubber.requests[0]
            self.assert_presigned_url_injected_in_request(sent_request.body)

    def test_start_db_instance_automated_backups_replication(self):
        params = {
            'SourceDBInstanceArn': 'arn:aws:rds:us-east-1:123456789012:db:source-db-instance',
            'SourceRegion': 'us-east-1',
        }
        response_body = (
            b'<StartDBInstanceAutomatedBackupsReplicationResponse>'
            b'<StartDBInstanceAutomatedBackupsReplicationResult>'
            b'</StartDBInstanceAutomatedBackupsReplicationResult>'
            b'</StartDBInstanceAutomatedBackupsReplicationResponse>'
        )
        self.http_stubber.add_response(body=response_body)
        with self.http_stubber:
            self.client.start_db_instance_automated_backups_replication(**params)
            sent_request = self.http_stubber.requests[0]
            self.assert_presigned_url_injected_in_request(sent_request.body)


class TestRDS(unittest.TestCase):
    def setUp(self):
        self.session = botocore.session.get_session()
        self.client = self.session.create_client('rds', 'us-west-2')
        self.stubber = Stubber(self.client)
        self.stubber.activate()

    def test_generate_db_auth_token(self):
        hostname = 'host.us-east-1.rds.amazonaws.com'
        port = 3306
        username = 'mySQLUser'
        auth_token = self.client.generate_db_auth_token(
            DBHostname=hostname, Port=port, DBUsername=username)

        endpoint_url = 'host.us-east-1.rds.amazonaws.com:3306'
        self.assertIn(endpoint_url, auth_token)
        self.assertIn('Action=connect', auth_token)

        # Asserts that there is no scheme in the url
        self.assertTrue(auth_token.startswith(hostname))
