from datetime import timedelta

from django.conf import settings
from django.utils import timezone

from authentications.decorators import ep_authenticated_user

from .api import get_ep_client, get_ep_group


@ep_authenticated_user
def _create_ep_session(request, expires):
    if not (ep_c := get_ep_client()):
        return None

    if not (ep_group := get_ep_group()):
        return None

    author = ep_c.createAuthorIfNotExistsFor(
        name=str(request.user),
        authorMapper=str(request.user),
    )

    try:
        result = ep_c.createSession(
            groupID=str(ep_group["groupID"]),
            authorID=str(author["authorID"]),
            validUntil=str(int(expires.timestamp())),
        )
    except Exception as e:
        raise e

    return result["sessionID"]


def add_ep_cookie(request, response):
    expires = timezone.now() + timedelta(hours=3)

    if ep_session := _create_ep_session(request, expires):
        response.set_cookie(
            "sessionID",
            ep_session,
            expires=expires,
            domain=settings.HOST_NAME,
            path="/",
        )
        response.set_cookie("sessionID", ep_session, expires=expires, path="/etherpad")

    return response


def del_ep_cookie(request, response):
    if "sessionID" in request.COOKIES:
        ep_c = get_ep_client()
        ep_c.deleteSession(sessionID=request.COOKIES["sessionID"])

        response.delete_cookie("sessionID", domain=settings.HOST_NAME, path="/")

    return response