from __future__ import absolute_import
from django.utils.translation import ugettext as _
from zerver.lib.actions import check_send_message
from zerver.lib.response import json_success, json_error
from zerver.decorator import REQ, has_request_variables, api_key_only_webhook_view

from zerver.models import Client, UserProfile

from django.http import HttpRequest, HttpResponse
from typing import Dict, Any

BODY_TEMPLATE = '{website_name} has {user_num} visitors online.'

@api_key_only_webhook_view('GoSquared')
@has_request_variables
def api_gosquared_webhook(request, user_profile, client,
                          payload=REQ(argument_type='body'),
                          stream=REQ(default='gosquared'),
                          topic=REQ(default='GoSquared')):
    # type: (HttpRequest, UserProfile, Client, Dict[str, Dict[str, Any]]) -> HttpResponse
    try:
        domain_name = payload['siteDetails']['domain']
        user_num = payload['concurrents']
        body = BODY_TEMPLATE.format(website_name=domain_name, user_num=user_num)
    except KeyError as e:
        return json_error(_("Missing key {} in JSON").format(str(e)))

    check_send_message(user_profile, client, 'stream', [stream], topic, body)
    return json_success()