from typing import Any, Dict, Iterable, Optional, Text

from django.http import HttpRequest, HttpResponse
from django.utils.translation import ugettext as _

from zerver.decorator import api_key_only_webhook_view
from zerver.lib.actions import check_send_stream_message
from zerver.lib.request import REQ, has_request_variables
from zerver.lib.response import json_error, json_success
from zerver.lib.validator import check_dict, check_string
from zerver.models import UserProfile

@api_key_only_webhook_view('OpsGenie')
@has_request_variables
def api_opsgenie_webhook(request, user_profile,
                         payload=REQ(argument_type='body'),
                         stream=REQ(default='opsgenie')):
    # type: (HttpRequest, UserProfile, Dict[str, Any], Text) -> HttpResponse

    # construct the body of the message
    info = {"additional_info": '',
            "alert_type": payload['action'],
            "alert_id": payload['alert']['alertId'],
            "integration_name": payload['integrationName'],
            "tags": ' '.join(['`' + tag + '`' for tag in payload['alert'].get('tags', [])]),
            }
    topic = info['integration_name']
    if 'note' in payload['alert']:
        info['additional_info'] += "Note: *{}*\n".format(payload['alert']['note'])
    if 'recipient' in payload['alert']:
        info['additional_info'] += "Recipient: *{}*\n".format(payload['alert']['recipient'])
    if 'addedTags' in payload['alert']:
        info['additional_info'] += "Added tags: *{}*\n".format(payload['alert']['addedTags'])
    if 'team' in payload['alert']:
        info['additional_info'] += "Added team: *{}*\n".format(payload['alert']['team'])
    if 'owner' in payload['alert']:
        info['additional_info'] += "Assigned owner: *{}*\n".format(payload['alert']['owner'])
    if 'escalationName' in payload:
        info['additional_info'] += "Escalation: *{}*\n".format(payload['escalationName'])
    if 'removedTags' in payload['alert']:
        info['additional_info'] += "Removed tags: *{}*\n".format(payload['alert']['removedTags'])
    if 'message' in payload['alert']:
        info['additional_info'] += "Message: *{}*\n".format(payload['alert']['message'])
    body = ''
    body_template = "**OpsGenie: [Alert for {integration_name}.]" \
                    "(https://app.opsgenie.com/alert/V2#/show/{alert_id})**\n" \
                    "Type: *{alert_type}*\n" \
                    "{additional_info}" \
                    "{tags}"
    body += body_template.format(**info)
    # send the message
    check_send_stream_message(user_profile, request.client, stream, topic, body)

    return json_success()

@@ -573,16 +573,42 @@
 uest
-, user_p
+: HttpRequest, user_profile: UserP
 rofi
@@ -643,16 +643,32 @@
  payload
+: Dict%5Bstr, Any%5D
 =REQ(arg
@@ -718,16 +718,22 @@
   stream
+: Text
 =REQ(def
@@ -753,70 +753,8 @@
 e'))
-:%0A    # type: (HttpRequest, UserProfile, Dict%5Bstr, Any%5D, Text)
  -%3E 
@@ -765,16 +765,17 @@
 Response
+:
 %0A%0A    # 

Use Python 3 type syntax in zerver/webhooks/opsgenie/view.py.