from sqlalchemy import desc, select
from sqlalchemy.orm import Session

from app.config import Settings
from app.models import CrawlRun
from app.services.crawler import run_crawl


def get_running_run(db: Session) -> CrawlRun | None:
    return db.scalar(select(CrawlRun).where(CrawlRun.status == "running").order_by(desc(CrawlRun.started_at)).limit(1))


def run_crawl_if_idle(db: Session, settings: Settings) -> tuple[CrawlRun, bool]:
    running = get_running_run(db)
    if running:
        return running, False
    return run_crawl(db, settings), True