"""Verify a small, prioritised sample of CORROBORATED GTINs with OSCBR (free plan). Credentials come ONLY from the Hub environment (OSCBR_TOKEN or OSCBR_USER/OSCBR_PASSWORD).

    python -m central.scripts.oscbr_backfill --limit 20 [--dry-run] [--report out.json]

Never spends the operational reserve (PROVIDER_OPERATIONAL_RESERVE_PERCENT), respects 5/min and 50/day, and never queries VERIFIED_KB, CONFLICT or invalid GTINs.
"""
import argparse
import json
import sys

from central.app.config import settings
from central.app.db import SessionLocal
from central.app.enrichment import backfill, history
from central.app.enrichment.providers import build_providers
from central.app.enrichment.quota import ProviderGateway


def main(argv=None):
    ap = argparse.ArgumentParser()
    ap.add_argument("--limit", type=int, default=20)
    ap.add_argument("--dry-run", action="store_true")
    ap.add_argument("--report", default=None)
    args = ap.parse_args(argv)
    providers = build_providers(settings)
    oscbr = next(p for p in providers if p.name == "oscbr")
    if not oscbr.configured and not args.dry_run:
        print(json.dumps({"OSCBR_STATUS": "NOT_CONFIGURED", "requests": 0}))
        return 2
    with SessionLocal() as session:
        current = history.official_sets(session)
        report = backfill.run(session, ProviderGateway(session, [oscbr]), oscbr, limit=args.limit, reserve_percent=settings.provider_operational_reserve_percent,
                              is_official=lambda v: v in current, dry_run=args.dry_run)
    text = json.dumps(report, indent=1, default=str)
    if args.report:
        open(args.report, "w", encoding="utf-8").write(text)
    print(text)
    return 0


if __name__ == "__main__":
    sys.exit(main())