# -*- coding: utf-8 -*-
# Copyright 2019 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.

import logging

from twisted.internet import defer

from synapse.http.servlet import parse_json_object_from_request
from synapse.replication.http._base import ReplicationEndpoint

logger = logging.getLogger(__name__)


class RegisterDeviceReplicationServlet(ReplicationEndpoint):
    """Ensure a device is registered, generating a new access token for the
    device.

    Used during registration and login.
    """

    NAME = "device_check_registered"
    PATH_ARGS = ("user_id",)

    def __init__(self, hs):
        super(RegisterDeviceReplicationServlet, self).__init__(hs)
        self.registration_handler = hs.get_registration_handler()

    @staticmethod
    def _serialize_payload(user_id, device_id, initial_display_name, is_guest):
        """
        Args:
            device_id (str|None): Device ID to use, if None a new one is
                generated.
            initial_display_name (str|None)
            is_guest (bool)
        """
        return {
            "device_id": device_id,
            "initial_display_name": initial_display_name,
            "is_guest": is_guest,
        }

    @defer.inlineCallbacks
    def _handle_request(self, request, user_id):
        content = parse_json_object_from_request(request)

        device_id = content["device_id"]
        initial_display_name = content["initial_display_name"]
        is_guest = content["is_guest"]

        device_id, access_token = yield self.registration_handler.register_device(
            user_id, device_id, initial_display_name, is_guest
        )

        return 200, {"device_id": device_id, "access_token": access_token}


def register_servlets(hs, http_server):
    RegisterDeviceReplicationServlet(hs).register(http_server)
