"""Space queries scoped by tenant membership."""

from __future__ import annotations

from django.db.models import Q, QuerySet

from coulomb_social.apps.members.models import Member

from .models import Space, SpaceMembership


def spaces_for_member(member: Member | None) -> QuerySet[Space]:
    """Spaces visible to this member (same tenant, active).

    Explicit SpaceMembership grants access; if none exist for the tenant yet,
    all active tenant spaces are listed (operator-seeded MVP). Once any
    memberships exist for the tenant, only membership + created_by apply.
    """
    if member is None:
        return Space.objects.none()

    qs = Space.objects.filter(tenant_id=member.tenant_id, is_active=True)
    tenant_has_memberships = SpaceMembership.objects.filter(
        space__tenant_id=member.tenant_id
    ).exists()
    if not tenant_has_memberships:
        return qs.order_by("title", "slug")

    return (
        qs.filter(Q(memberships__member=member) | Q(created_by=member))
        .distinct()
        .order_by("title", "slug")
    )


def get_space_for_member(member: Member | None, slug: str) -> Space | None:
    if member is None:
        return None
    return spaces_for_member(member).filter(slug=slug).first()