# -*- coding: utf-8 -*-
# Copyright 2019 The Matrix.org Foundation C.I.C.
#
# 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 synapse.api.errors import SynapseError
from synapse.http.servlet import (
    RestServlet,
    assert_params_in_dict,
    parse_json_object_from_request,
)
from synapse.rest.admin._base import admin_patterns, assert_user_is_admin

logger = logging.getLogger(__name__)


class DeleteGroupAdminRestServlet(RestServlet):
    """Allows deleting of local groups
    """

    PATTERNS = admin_patterns("/delete_group/(?P<group_id>[^/]*)")

    def __init__(self, hs):
        self.group_server = hs.get_groups_server_handler()
        self.is_mine_id = hs.is_mine_id
        self.auth = hs.get_auth()

    async def on_POST(self, request, group_id):
        requester = await self.auth.get_user_by_req(request)
        await assert_user_is_admin(self.auth, requester.user)

        if not self.is_mine_id(group_id):
            raise SynapseError(400, "Can only delete local groups")

        await self.group_server.delete_group(group_id, requester.user.to_string())
        return 200, {}


class ForceJoinGroupAdminRestServlet(RestServlet):
    """Allows a server admin to force-join a local user to a local group.
    """

    PATTERNS = admin_patterns("/group/(?P<group_id>[^/]*)/force_join$")

    def __init__(self, hs):
        self.groups_handler = hs.get_groups_local_handler()
        self.is_mine_id = hs.is_mine_id
        self.auth = hs.get_auth()

    async def on_POST(self, request, group_id):
        requester = await self.auth.get_user_by_req(request)
        await assert_user_is_admin(self.auth, requester.user)

        if not self.is_mine_id(group_id):
            raise SynapseError(400, "Can only affect local groups")

        body = parse_json_object_from_request(request, allow_empty_body=False)
        assert_params_in_dict(body, ["user_id"])
        target_user_id = body["user_id"]
        await self.groups_handler.force_join_user_to_group(group_id, target_user_id)

        return 200, {}


class UpdatePublicityGroupAdminRestServlet(RestServlet):
    """Allows a server admin to update a user's publicity (flair) for a given group.
    """

    PATTERNS = admin_patterns("/group/(?P<group_id>[^/]*)/update_publicity$")

    def __init__(self, hs):
        self.store = hs.get_datastore()
        self.is_mine_id = hs.is_mine_id
        self.auth = hs.get_auth()

    async def on_POST(self, request, group_id):
        requester = await self.auth.get_user_by_req(request)
        await assert_user_is_admin(self.auth, requester.user)

        body = parse_json_object_from_request(request, allow_empty_body=False)
        assert_params_in_dict(body, ["user_id"])
        target_user_id = body["user_id"]
        if not self.is_mine_id(target_user_id):
            raise SynapseError(400, "Can only affect local users")

        # Logic copied from `/self/update_publicity` endpoint.
        publicise = body["publicise"]
        await self.store.update_group_publicity(group_id, target_user_id, publicise)

        return 200, {}