#
# 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, Dict, List, Tuple

from synapse.api.constants import ThirdPartyEntityKind
from synapse.http.server import HttpServer
from synapse.http.servlet import RestServlet
from synapse.http.site import SynapseRequest
from synapse.types import JsonDict

from ._base import client_patterns

if TYPE_CHECKING:
    from synapse.server import HomeServer

logger = logging.getLogger(__name__)


class ThirdPartyProtocolsServlet(RestServlet):
    PATTERNS = client_patterns("/thirdparty/protocols")

    def __init__(self, hs: "HomeServer"):
        super().__init__()

        self.auth = hs.get_auth()
        self.appservice_handler = hs.get_application_service_handler()

    async def on_GET(self, request: SynapseRequest) -> Tuple[int, JsonDict]:
        await self.auth.get_user_by_req(request, allow_guest=True)

        protocols = await self.appservice_handler.get_3pe_protocols()
        return 200, protocols


class ThirdPartyProtocolServlet(RestServlet):
    PATTERNS = client_patterns("/thirdparty/protocol/(?P<protocol>[^/]+)$")

    def __init__(self, hs: "HomeServer"):
        super().__init__()

        self.auth = hs.get_auth()
        self.appservice_handler = hs.get_application_service_handler()

    async def on_GET(
        self, request: SynapseRequest, protocol: str
    ) -> Tuple[int, JsonDict]:
        await self.auth.get_user_by_req(request, allow_guest=True)

        protocols = await self.appservice_handler.get_3pe_protocols(
            only_protocol=protocol
        )
        if protocol in protocols:
            return 200, protocols[protocol]
        else:
            return 404, {"error": "Unknown protocol"}


class ThirdPartyUserServlet(RestServlet):
    PATTERNS = client_patterns("/thirdparty/user(/(?P<protocol>[^/]+))?$")

    def __init__(self, hs: "HomeServer"):
        super().__init__()

        self.auth = hs.get_auth()
        self.appservice_handler = hs.get_application_service_handler()

    async def on_GET(
        self, request: SynapseRequest, protocol: str
    ) -> Tuple[int, List[JsonDict]]:
        await self.auth.get_user_by_req(request, allow_guest=True)

        fields: Dict[bytes, List[bytes]] = request.args  # type: ignore[assignment]
        fields.pop(b"access_token", None)

        results = await self.appservice_handler.query_3pe(
            ThirdPartyEntityKind.USER, protocol, fields
        )

        return 200, results


class ThirdPartyLocationServlet(RestServlet):
    PATTERNS = client_patterns("/thirdparty/location(/(?P<protocol>[^/]+))?$")

    def __init__(self, hs: "HomeServer"):
        super().__init__()

        self.auth = hs.get_auth()
        self.appservice_handler = hs.get_application_service_handler()

    async def on_GET(
        self, request: SynapseRequest, protocol: str
    ) -> Tuple[int, List[JsonDict]]:
        await self.auth.get_user_by_req(request, allow_guest=True)

        fields: Dict[bytes, List[bytes]] = request.args  # type: ignore[assignment]
        fields.pop(b"access_token", None)

        results = await self.appservice_handler.query_3pe(
            ThirdPartyEntityKind.LOCATION, protocol, fields
        )

        return 200, results


def register_servlets(hs: "HomeServer", http_server: HttpServer) -> None:
    ThirdPartyProtocolsServlet(hs).register(http_server)
    ThirdPartyProtocolServlet(hs).register(http_server)
    ThirdPartyUserServlet(hs).register(http_server)
    ThirdPartyLocationServlet(hs).register(http_server)