import time

from .db import db
from .models import PaperMetadata


def run_scraper():
    while True:
        with db.app.app_context():
            paper = Paper.query.filter_by(status="Pending").first()
            if paper:
                try:
                    # Scraping logic (e.g. download PDF)
                    paper.status = "Done"
                    paper.file_path = "papers/some_path.pdf"
                except Exception as e:
                    paper.status = "Failed"
                    paper.error_message = str(e)
                db.session.commit()
            else:
                time.sleep(60)