# Copyright 2013-2015 MongoDB, 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.

"""Test Motor, an asynchronous driver for MongoDB and Tornado."""

import pymongo
from pymongo import WriteConcern
from pymongo.errors import ConfigurationError
from pymongo.read_preferences import ReadPreference, Secondary, Nearest
from tornado.testing import gen_test

import motor
import test
from test import SkipTest
from test.tornado_tests import MotorTest
from test.utils import ignore_deprecations


class MotorTestBasic(MotorTest):
    def test_repr(self):
        self.assertTrue(repr(self.cx).startswith('MotorClient'))
        self.assertTrue(repr(self.db).startswith('MotorDatabase'))
        self.assertTrue(repr(self.collection).startswith('MotorCollection'))
        cursor = self.collection.find()
        self.assertTrue(repr(cursor).startswith('MotorCursor'))

    @gen_test
    async def test_write_concern(self):
        # Default empty dict means "w=1"
        self.assertEqual(WriteConcern(), self.cx.write_concern)

        await self.collection.delete_many({})
        await self.collection.insert_one({'_id': 0})

        for gle_options in [
            {},
            {'w': 0},
            {'w': 1},
            {'wtimeout': 1000},
        ]:
            cx = self.motor_client(test.env.uri, **gle_options)
            wc = WriteConcern(**gle_options)
            self.assertEqual(wc, cx.write_concern)

            db = cx.motor_test
            self.assertEqual(wc, db.write_concern)

            collection = db.test_collection
            self.assertEqual(wc, collection.write_concern)

            if wc.acknowledged:
                with self.assertRaises(pymongo.errors.DuplicateKeyError):
                    await collection.insert_one({'_id': 0})
            else:
                await collection.insert_one({'_id': 0})  # No error

            # No error
            c = collection.with_options(write_concern=WriteConcern(w=0))
            await c.insert_one({'_id': 0})
            cx.close()

    @ignore_deprecations
    def test_read_preference(self):
        # Check the default
        cx = motor.MotorClient(test.env.uri, io_loop=self.io_loop)
        self.assertEqual(ReadPreference.PRIMARY, cx.read_preference)

        # We can set mode, tags, and latency.
        cx = self.motor_client(
            read_preference=Secondary(tag_sets=[{'foo': 'bar'}]),
            localThresholdMS=42)

        self.assertEqual(ReadPreference.SECONDARY.mode, cx.read_preference.mode)
        self.assertEqual([{'foo': 'bar'}], cx.read_preference.tag_sets)
        self.assertEqual(42, cx.local_threshold_ms)

        # Make a MotorCursor and get its PyMongo Cursor
        collection = cx.motor_test.test_collection.with_options(
            read_preference=Nearest(tag_sets=[{'yay': 'jesse'}]))

        motor_cursor = collection.find()
        cursor = motor_cursor.delegate

        self.assertEqual(Nearest(tag_sets=[{'yay': 'jesse'}]),
                         cursor._read_preference())

        cx.close()

    def test_underscore(self):
        self.assertIsInstance(self.cx['_db'],
                              motor.MotorDatabase)
        self.assertIsInstance(self.db['_collection'],
                              motor.MotorCollection)
        self.assertIsInstance(self.collection['_collection'],
                              motor.MotorCollection)

        with self.assertRaises(AttributeError):
            self.cx._db

        with self.assertRaises(AttributeError):
            self.db._collection

        with self.assertRaises(AttributeError):
            self.collection._collection

    def test_abc(self):
        try:
            from abc import ABC
        except ImportError:
            # Python < 3.4.
            raise SkipTest()

        class C(ABC):
            db = self.db
            collection = self.collection
            subcollection = self.collection.subcollection

        # MOTOR-104, TypeError: Can't instantiate abstract class C with abstract
        # methods collection, db, subcollection.
        C()

    @gen_test
    async def test_inheritance(self):
        class CollectionSubclass(motor.MotorCollection):
            pass

        class DatabaseSubclass(motor.MotorDatabase):
            def __getitem__(self, name):
                return CollectionSubclass(self, name)

        class ClientSubclass(motor.MotorClient):
            def __getitem__(self, name):
                return DatabaseSubclass(self, name)

        cx = ClientSubclass(test.env.uri, **self.get_client_kwargs())
        self.assertIsInstance(cx, ClientSubclass)

        db = cx['testdb']
        self.assertIsInstance(db, DatabaseSubclass)

        coll = db['testcoll']
        self.assertIsInstance(coll, CollectionSubclass)
        self.assertIsNotNone(await coll.insert_one({}))