# backend/api/v1/schedule/views.py
"""
ViewSets для django-scheduler (чистый, проверенный код).
Параллельно работают со старым calendar_app.
"""

from django.contrib.contenttypes.models import ContentType
from django.db.models import Q
from schedule.models import (
    CalendarRelation,
)


def _admin_requested_all_scope(request) -> bool:
    user = request.user
    if not (user.is_staff or user.is_superuser):
        return False
    return request.query_params.get("scope") == "all"


def _user_accessible_calendar_ids(user):
    from django.contrib.auth import get_user_model
    from schedule.models import Calendar

    from scheduling.models import CalendarBinding

    User = get_user_model()
    ct = ContentType.objects.get_for_model(User)
    relation_ids = CalendarRelation.objects.filter(
        content_type=ct,
        object_id=user.id,
    ).values_list("calendar_id", flat=True)
    return Calendar.objects.filter(
        Q(id__in=relation_ids)
        | Q(
            binding__type=CalendarBinding.BindingType.DEFAULT,
            binding__access_scope=CalendarBinding.AccessScope.ALL,
        )
    ).values_list("id", flat=True)