from datetime import datetime, timedelta

from .api import get_ep_client
from authentications.decorators import ep_authenticated_user


@ep_authenticated_user
def __get_ep_sessionid(request):
    epc, group = get_ep_client()
    if not epc or not group:
        return None, None

    author = epc.createAuthorIfNotExistsFor(
        name=str(request.user),
        authorMapper=str(request.user)
    )['authorID']

    expires = datetime.utcnow() + timedelta(hours=3)
    try:
        result = epc.createSession(
            groupID=str(group['groupID']),
            authorID=str(author),
            validUntil=str(int(expires.timestamp()))
        )
    except Exception as e:
        raise e
        return None, None

    return result['sessionID'], expires


def add_ep_cookie(request, response):
    ep_sessid, expires = __get_ep_sessionid(request)

    if ep_sessid:
        response.set_cookie(
            "sessionID",
            ep_sessid,
            expires=expires,
            domain=".2020.fet.at",
            path="/"
        )
        response.set_cookie(
            "sessionID",
            ep_sessid,
            expires=expires,
            path="/etherpad"
        )
    return response


def del_ep_cookie(request, response):

    if 'sessionID' in request.COOKIES:
        ep_sessionID = request.COOKIES['sessionID']

        epc, group = get_ep_client()
        epc.deleteSession(sessionID=ep_sessionID)

        response.delete_cookie(
            "sessionID",
            domain=".2020.fet.at",
            path="/"
        )
    return response