# -*- coding: utf-8 -*-
# Copyright 2014-2016 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.

""" This module contains REST servlets to do with profile: /profile/<paths> """
from twisted.internet import defer

from synapse.http.servlet import parse_json_object_from_request
from synapse.types import UserID

from .base import ClientV1RestServlet, client_path_patterns


class ProfileDisplaynameRestServlet(ClientV1RestServlet):
    PATTERNS = client_path_patterns("/profile/(?P<user_id>[^/]*)/displayname")

    def __init__(self, hs):
        super(ProfileDisplaynameRestServlet, self).__init__(hs)
        self.profile_handler = hs.get_profile_handler()
        self.http_client = hs.get_simple_http_client()

    @defer.inlineCallbacks
    def on_GET(self, request, user_id):
        user = UserID.from_string(user_id)

        displayname = yield self.profile_handler.get_displayname(
            user,
        )

        ret = {}
        if displayname is not None:
            ret["displayname"] = displayname

        defer.returnValue((200, ret))

    @defer.inlineCallbacks
    def on_PUT(self, request, user_id):
        requester = yield self.auth.get_user_by_req(request, allow_guest=True)
        user = UserID.from_string(user_id)
        is_admin = yield self.auth.is_server_admin(requester.user)

        content = parse_json_object_from_request(request)

        try:
            new_name = content["displayname"]
        except Exception:
            defer.returnValue((400, "Unable to parse name"))

        yield self.profile_handler.set_displayname(
            user, requester, new_name, is_admin)

        if self.hs.config.shadow_server:
            self.shadow_displayname(user_id, content)

        defer.returnValue((200, {}))

    def on_OPTIONS(self, request, user_id):
        return (200, {})

    @defer.inlineCallbacks
    def shadow_displayname(self, user_id, body):
        # TODO: retries
        shadow_hs_url = self.hs.config.shadow_server.get("hs_url")
        as_token = self.hs.config.shadow_server.get("as_token")
        body['access_token'] = as_token

        yield self.http_client.post_urlencoded_get_json(
            "%s%s" % (
                shadow_hs_url, ("/_matrix/client/r0/profile/%s/displayname" % user_id)
            ),
            body
        )


class ProfileAvatarURLRestServlet(ClientV1RestServlet):
    PATTERNS = client_path_patterns("/profile/(?P<user_id>[^/]*)/avatar_url")

    def __init__(self, hs):
        super(ProfileAvatarURLRestServlet, self).__init__(hs)
        self.profile_handler = hs.get_profile_handler()
        self.http_client = hs.get_simple_http_client()

    @defer.inlineCallbacks
    def on_GET(self, request, user_id):
        user = UserID.from_string(user_id)

        avatar_url = yield self.profile_handler.get_avatar_url(
            user,
        )

        ret = {}
        if avatar_url is not None:
            ret["avatar_url"] = avatar_url

        defer.returnValue((200, ret))

    @defer.inlineCallbacks
    def on_PUT(self, request, user_id):
        requester = yield self.auth.get_user_by_req(request)
        user = UserID.from_string(user_id)
        is_admin = yield self.auth.is_server_admin(requester.user)

        content = parse_json_object_from_request(request)
        try:
            new_name = content["avatar_url"]
        except Exception:
            defer.returnValue((400, "Unable to parse name"))

        yield self.profile_handler.set_avatar_url(
            user, requester, new_name, is_admin)

        if self.hs.config.shadow_server:
            self.shadow_avatar_url(user_id, content)

        defer.returnValue((200, {}))

    def on_OPTIONS(self, request, user_id):
        return (200, {})

    @defer.inlineCallbacks
    def shadow_avatar_url(self, user_id, body):
        # TODO: retries
        shadow_hs_url = self.hs.config.shadow_server.get("hs_url")
        as_token = self.hs.config.shadow_server.get("as_token")
        body['access_token'] = as_token

        yield self.http_client.post_urlencoded_get_json(
            "%s%s" % (
                shadow_hs_url, ("/_matrix/client/r0/profile/%s/avatar_url" % user_id)
            ),
            body
        )


class ProfileRestServlet(ClientV1RestServlet):
    PATTERNS = client_path_patterns("/profile/(?P<user_id>[^/]*)")

    def __init__(self, hs):
        super(ProfileRestServlet, self).__init__(hs)
        self.profile_handler = hs.get_profile_handler()

    @defer.inlineCallbacks
    def on_GET(self, request, user_id):
        user = UserID.from_string(user_id)

        displayname = yield self.profile_handler.get_displayname(
            user,
        )
        avatar_url = yield self.profile_handler.get_avatar_url(
            user,
        )

        ret = {}
        if displayname is not None:
            ret["displayname"] = displayname
        if avatar_url is not None:
            ret["avatar_url"] = avatar_url

        defer.returnValue((200, ret))


def register_servlets(hs, http_server):
    ProfileDisplaynameRestServlet(hs).register(http_server)
    ProfileAvatarURLRestServlet(hs).register(http_server)
    ProfileRestServlet(hs).register(http_server)