# Webhooks for external integrations.
from django.http import HttpRequest, HttpResponse

from zerver.decorator import authenticated_rest_api_view
from zerver.lib.request import REQ, has_request_variables
from zerver.lib.response import json_success
from zerver.lib.webhooks.common import check_send_webhook_message
from zerver.models import UserProfile


def truncate(string: str, length: int) -> str:
    if len(string) > length:
        string = string[:length-3] + '...'
    return string

@authenticated_rest_api_view(webhook_client_name="Zendesk")
@has_request_variables
def api_zendesk_webhook(request: HttpRequest, user_profile: UserProfile,
                        ticket_title: str=REQ(), ticket_id: str=REQ(),
                        message: str=REQ()) -> HttpResponse:
    """
    Zendesk uses triggers with message templates. This webhook uses the
    ticket_id and ticket_title to create a subject. And passes with zendesk
    user's configured message to zulip.
    """
    subject = truncate(f'#{ticket_id}: {ticket_title}', 60)
    check_send_webhook_message(request, user_profile, subject, message)
    return json_success()