#
# This file is licensed under the Affero General Public License (AGPL) version 3.
#
# Copyright (C) 2023 New Vector, Ltd
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
#
# See the GNU Affero General Public License for more details:
# <https://www.gnu.org/licenses/agpl-3.0.html>.
#
# Originally licensed under the Apache License, Version 2.0:
# <http://www.apache.org/licenses/LICENSE-2.0>.
#
# [This file includes modifications made by New Vector Limited]
#
#

import logging
from typing import TYPE_CHECKING, Tuple

from synapse.http import servlet
from synapse.http.server import HttpServer
from synapse.http.servlet import assert_params_in_dict, parse_json_object_from_request
from synapse.http.site import SynapseRequest
from synapse.logging.opentracing import set_tag
from synapse.rest.client.transactions import HttpTransactionCache
from synapse.types import JsonDict, Requester

from ._base import client_patterns

if TYPE_CHECKING:
    from synapse.server import HomeServer

logger = logging.getLogger(__name__)


class SendToDeviceRestServlet(servlet.RestServlet):
    PATTERNS = client_patterns(
        "/sendToDevice/(?P<message_type>[^/]*)/(?P<txn_id>[^/]*)$"
    )
    CATEGORY = "The to_device stream"

    def __init__(self, hs: "HomeServer"):
        super().__init__()
        self.hs = hs
        self.auth = hs.get_auth()
        self.txns = HttpTransactionCache(hs)
        self.device_message_handler = hs.get_device_message_handler()

    async def on_PUT(
        self, request: SynapseRequest, message_type: str, txn_id: str
    ) -> Tuple[int, JsonDict]:
        requester = await self.auth.get_user_by_req(request, allow_guest=True)
        set_tag("txn_id", txn_id)
        return await self.txns.fetch_or_execute_request(
            request,
            requester,
            self._put,
            request,
            requester,
            message_type,
        )

    async def _put(
        self,
        request: SynapseRequest,
        requester: Requester,
        message_type: str,
    ) -> Tuple[int, JsonDict]:
        content = parse_json_object_from_request(request)
        assert_params_in_dict(content, ("messages",))

        await self.device_message_handler.send_device_message(
            requester, message_type, content["messages"]
        )

        return 200, {}


def register_servlets(hs: "HomeServer", http_server: HttpServer) -> None:
    SendToDeviceRestServlet(hs).register(http_server)