from typing import Any, Dict

from django.http import HttpRequest, HttpResponse

from zerver.decorator import webhook_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

LINK_TEMPLATE = "[See in Wekan]({url})"
MESSAGE_TEMPLATE = "{body}\n\n{footer}"


def get_url(text: str) -> str:
    return text.split("\n")[-1]


def get_hyperlinked_url(text: str) -> str:
    url = get_url(text)
    return LINK_TEMPLATE.format(url=url)


def clean_payload_text(text: str) -> str:
    url = get_url(text)
    return text.replace(url, "").replace("\n", "")


def get_message_body(payload: Dict[str, Any], action: str) -> str:
    footer = get_hyperlinked_url(payload["text"])
    body = process_message_data(payload, action)
    return MESSAGE_TEMPLATE.format(body=body, footer=footer)


def process_message_data(payload: Dict[str, Any], action: str) -> str:
    payload["text"] = clean_payload_text(payload["text"])
    return "{text}.".format(**payload)


@webhook_view("Wekan")
@has_request_variables
def api_wekan_webhook(
    request: HttpRequest,
    user_profile: UserProfile,
    payload: Dict[str, Any] = REQ(argument_type="body"),
) -> HttpResponse:
    topic = "Wekan Notification"
    body = get_message_body(payload, payload["description"])
    check_send_webhook_message(request, user_profile, topic, body)
    return json_success(request)

from django.http import HttpRequest, HttpResponse

from zerver.decorator import webhook_view
from zerver.lib.request import REQ, has_request_variables
from zerver.lib.response import json_success
from zerver.lib.validator import WildValue, check_string, to_wild_value
from zerver.lib.webhooks.common import check_send_webhook_message
from zerver.models import UserProfile

LINK_TEMPLATE = "[See in Wekan]({url})"
MESSAGE_TEMPLATE = "{body}\n\n{footer}"


def get_url(text: str) -> str:
    return text.split("\n")[-1]


def get_hyperlinked_url(text: str) -> str:
    url = get_url(text)
    return LINK_TEMPLATE.format(url=url)


def clean_payload_text(text: str) -> str:
    url = get_url(text)
    return text.replace(url, "").replace("\n", "")


def get_message_body(payload: WildValue) -> str:
    footer = get_hyperlinked_url(payload["text"].tame(check_string))
    body = process_message_data(payload)
    return MESSAGE_TEMPLATE.format(body=body, footer=footer)


def process_message_data(payload: WildValue) -> str:
    text = clean_payload_text(payload["text"].tame(check_string))
    return f"{text}."


@webhook_view("Wekan")
@has_request_variables
def api_wekan_webhook(
    request: HttpRequest,
    user_profile: UserProfile,
    payload: WildValue = REQ(argument_type="body", converter=to_wild_value),
) -> HttpResponse:
    topic = "Wekan Notification"
    body = get_message_body(payload)
    check_send_webhook_message(request, user_profile, topic, body)
    return json_success(request)

Strengthen types using WildValue.