# Copyright 2018 New Vector Ltd
#
# 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.

from synapse.api.errors import Codes, ResourceLimitError
from synapse.api.filtering import DEFAULT_FILTER_COLLECTION
from synapse.handlers.sync import SyncConfig
from synapse.types import UserID, create_requester

import tests.unittest
import tests.utils


class SyncTestCase(tests.unittest.HomeserverTestCase):
    """Tests Sync Handler."""

    def prepare(self, reactor, clock, hs):
        self.hs = hs
        self.sync_handler = self.hs.get_sync_handler()
        self.store = self.hs.get_datastore()

        # AuthBlocking reads from the hs' config on initialization. We need to
        # modify its config instead of the hs'
        self.auth_blocking = self.hs.get_auth()._auth_blocking

    def test_wait_for_sync_for_user_auth_blocking(self):
        user_id1 = "@user1:test"
        user_id2 = "@user2:test"
        sync_config = generate_sync_config(user_id1)
        requester = create_requester(user_id1)

        self.reactor.advance(100)  # So we get not 0 time
        self.auth_blocking._limit_usage_by_mau = True
        self.auth_blocking._max_mau_value = 1

        # Check that the happy case does not throw errors
        self.get_success(self.store.upsert_monthly_active_user(user_id1))
        self.get_success(
            self.sync_handler.wait_for_sync_for_user(requester, sync_config)
        )

        # Test that global lock works
        self.auth_blocking._hs_disabled = True
        e = self.get_failure(
            self.sync_handler.wait_for_sync_for_user(requester, sync_config),
            ResourceLimitError,
        )
        self.assertEquals(e.value.errcode, Codes.RESOURCE_LIMIT_EXCEEDED)

        self.auth_blocking._hs_disabled = False

        sync_config = generate_sync_config(user_id2)
        requester = create_requester(user_id2)

        e = self.get_failure(
            self.sync_handler.wait_for_sync_for_user(requester, sync_config),
            ResourceLimitError,
        )
        self.assertEquals(e.value.errcode, Codes.RESOURCE_LIMIT_EXCEEDED)


def generate_sync_config(user_id: str) -> SyncConfig:
    return SyncConfig(
        user=UserID(user_id.split(":")[0][1:], user_id.split(":")[1]),
        filter_collection=DEFAULT_FILTER_COLLECTION,
        is_guest=False,
        request_key="request_key",
        device_id="device_id",
    )
