"""CLI-Entrypoint."""
from __future__ import annotations

import argparse
import logging
import sys
from pathlib import Path

from . import __version__
from .config import load_config
from .service import HotfolderService


def _setup_logging(level: str) -> None:
    logging.basicConfig(
        level=getattr(logging, level.upper(), logging.INFO),
        format="%(asctime)s %(levelname)-7s %(name)s: %(message)s",
        datefmt="%Y-%m-%d %H:%M:%S",
    )


def main() -> int:
    parser = argparse.ArgumentParser(
        prog="pdf-ocr-hotfolder",
        description="Wandelt eingehende PDFs per OCR in durchsuchbare PDFs um.",
    )
    parser.add_argument("--config", "-c", default="/etc/pdf-ocr-hotfolder/config.toml",
                        help="Pfad zur Konfigurationsdatei (TOML)")
    parser.add_argument("--version", action="version", version=f"%(prog)s {__version__}")
    parser.add_argument("--once", action="store_true",
                        help="Nur bestehende Dateien verarbeiten und beenden")
    args = parser.parse_args()

    cfg_path = Path(args.config)
    if not cfg_path.exists():
        print(f"Config nicht gefunden: {cfg_path}", file=sys.stderr)
        return 2

    cfg = load_config(cfg_path)
    _setup_logging(cfg.log_level)

    service = HotfolderService(cfg)
    if args.once:
        service._ensure_dirs()  # noqa: SLF001
        service._scan_existing()  # noqa: SLF001
        service._executor.shutdown(wait=True)  # noqa: SLF001
        return 0

    try:
        service.run()
    except KeyboardInterrupt:
        pass
    return 0


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