# -*- coding: utf-8 -*-
# Copyright 2015 OpenMarket 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 ._base import client_v2_patterns

from synapse.http.servlet import RestServlet
from synapse.api.errors import AuthError, SynapseError

from twisted.internet import defer

import logging

import simplejson as json

logger = logging.getLogger(__name__)


class AccountDataServlet(RestServlet):
    """
    PUT /user/{user_id}/account_data/{account_dataType} HTTP/1.1
    """
    PATTERNS = client_v2_patterns(
        "/user/(?P<user_id>[^/]*)/account_data/(?P<account_data_type>[^/]*)"
    )

    def __init__(self, hs):
        super(AccountDataServlet, self).__init__()
        self.auth = hs.get_auth()
        self.store = hs.get_datastore()
        self.notifier = hs.get_notifier()

    @defer.inlineCallbacks
    def on_PUT(self, request, user_id, account_data_type):
        auth_user, _, _ = yield self.auth.get_user_by_req(request)
        if user_id != auth_user.to_string():
            raise AuthError(403, "Cannot add account data for other users.")

        try:
            content_bytes = request.content.read()
            body = json.loads(content_bytes)
        except:
            raise SynapseError(400, "Invalid JSON")

        max_id = yield self.store.add_account_data_for_user(
            user_id, account_data_type, body
        )

        yield self.notifier.on_new_event(
            "account_data_key", max_id, users=[user_id]
        )

        defer.returnValue((200, {}))


class RoomAccountDataServlet(RestServlet):
    """
    PUT /user/{user_id}/rooms/{room_id}/account_data/{account_dataType} HTTP/1.1
    """
    PATTERNS = client_v2_patterns(
        "/user/(?P<user_id>[^/]*)"
        "/rooms/(?P<room_id>[^/]*)"
        "/account_data/(?P<account_data_type>[^/]*)"
    )

    def __init__(self, hs):
        super(RoomAccountDataServlet, self).__init__()
        self.auth = hs.get_auth()
        self.store = hs.get_datastore()
        self.notifier = hs.get_notifier()

    @defer.inlineCallbacks
    def on_PUT(self, request, user_id, room_id, account_data_type):
        auth_user, _, _ = yield self.auth.get_user_by_req(request)
        if user_id != auth_user.to_string():
            raise AuthError(403, "Cannot add account data for other users.")

        try:
            content_bytes = request.content.read()
            body = json.loads(content_bytes)
        except:
            raise SynapseError(400, "Invalid JSON")

        if not isinstance(body, dict):
            raise ValueError("Expected a JSON object")

        max_id = yield self.store.add_account_data_to_room(
            user_id, room_id, account_data_type, body
        )

        yield self.notifier.on_new_event(
            "account_data_key", max_id, users=[user_id]
        )

        defer.returnValue((200, {}))


def register_servlets(hs, http_server):
    AccountDataServlet(hs).register(http_server)
    RoomAccountDataServlet(hs).register(http_server)