from __future__ import annotations

from datetime import timedelta

from django.db.models import Q
from django.utils import timezone

from apps.jobs.models import JobPosting


def update_lifecycle(
    *, uncertain_after_days: int = 3, removed_after_days: int = 14
) -> dict[str, int]:
    now = timezone.now()
    expired = JobPosting.objects.filter(
        status__in=[JobPosting.Status.ACTIVE, JobPosting.Status.UNCERTAIN],
        valid_through__lt=now,
    ).update(status=JobPosting.Status.EXPIRED)
    uncertain_cutoff = now - timedelta(days=uncertain_after_days)
    uncertain = JobPosting.objects.filter(
        status=JobPosting.Status.ACTIVE,
        last_seen__lt=uncertain_cutoff,
        valid_through__isnull=True,
    ).update(status=JobPosting.Status.UNCERTAIN)
    removed_cutoff = now - timedelta(days=removed_after_days)
    removed = JobPosting.objects.filter(
        Q(status=JobPosting.Status.UNCERTAIN),
        last_seen__lt=removed_cutoff,
    ).update(status=JobPosting.Status.REMOVED)
    return {"expired": expired, "uncertain": uncertain, "removed": removed}