from datetime import datetime
from django.urls.base import reverse
import zoneinfo


def params(**kwargs):
    params = "&".join([f"{key}" + ("" if kwargs[key] is None else f"={kwargs[key]}") for key in kwargs])
    if len(params) > 0:
        params = "?" + params
    return params


def url_page(request, rel_path, **kwargs):
    return reverse('page-page', kwargs={'rel_path': rel_path}) + params(**kwargs)


def url_helpview(request, page):
    return reverse('page-helpview', kwargs={'page': page})


def url_edit(request, rel_path, **kwargs):
    return reverse('page-edit', kwargs={'rel_path': rel_path}) + params(**kwargs)


def get_search_query(request):
    return request.GET.get('q')


def timestamp_to_datetime(request, tm):
    from users.models import get_userprofile
    #
    try:
        up = get_userprofile(request.user)
    except AttributeError:
        return datetime.fromtimestamp(tm)
    else:
        tz = zoneinfo.ZoneInfo(up.timezone)
        #
        return datetime.fromtimestamp(tm, tz)