"""Drain queued Vignette email notifications once.

Use from Task Scheduler, cron, or a one-shot ops shell after SMTP env is loaded.
"""

from __future__ import annotations

import argparse
import asyncio
import json
import sys
from pathlib import Path


ROOT = Path(__file__).resolve().parents[1]
API_ROOT = ROOT / "apps" / "api"
if str(API_ROOT) not in sys.path:
    sys.path.insert(0, str(API_ROOT))


async def main_async(argv: list[str]) -> int:
    parser = argparse.ArgumentParser(description=__doc__)
    parser.add_argument("--limit", type=int, default=25, help="Maximum deliveries to process.")
    args = parser.parse_args(argv)

    from app.db import close_pool, init_pool
    from app.services.notifications import ensure_notification_tables, process_queued_email_notifications

    await init_pool()
    try:
        await ensure_notification_tables()
        result = await process_queued_email_notifications(limit=args.limit)
        print(json.dumps(result, ensure_ascii=False, sort_keys=True))
        return 1 if result.get("failed", 0) else 0
    finally:
        await close_pool()


def main() -> int:
    return asyncio.run(main_async(sys.argv[1:]))


if __name__ == "__main__":
    raise SystemExit(main())