"""Global admin-controlled app state (e.g. pausing background sync)."""
import logging

from sqlalchemy.orm import Session

from app.config import settings
from app.models import AppState

log = logging.getLogger("subfeed.state")

# Bounds for the admin-set maintenance re-validation batch (videos re-checked per run).
MAINTENANCE_BATCH_MIN = 100
MAINTENANCE_BATCH_MAX = 100_000


def _row(db: Session) -> AppState:
    row = db.get(AppState, 1)
    if row is None:
        row = AppState(id=1, sync_paused=False)
        db.add(row)
        db.commit()
    return row


def is_sync_paused(db: Session) -> bool:
    return _row(db).sync_paused


def set_sync_paused(db: Session, paused: bool) -> None:
    row = _row(db)
    row.sync_paused = paused
    db.add(row)
    db.commit()
    log.info("Background sync %s", "paused" if paused else "resumed")


def get_maintenance_batch(db: Session) -> int:
    """Effective maintenance re-validation batch: the admin override if set, else the
    env/config default."""
    return _row(db).maintenance_revalidate_batch or settings.maintenance_revalidate_batch


def set_maintenance_batch(db: Session, value: int) -> int:
    """Clamp and persist the maintenance batch override. Returns the applied value."""
    value = max(MAINTENANCE_BATCH_MIN, min(MAINTENANCE_BATCH_MAX, int(value)))
    row = _row(db)
    row.maintenance_revalidate_batch = value
    db.add(row)
    db.commit()
    log.info("Maintenance re-validation batch set to %s", value)
    return value