from pathlib import Path

from google_auth_oauthlib.flow import InstalledAppFlow

from app.config import get_settings
from app.google.auth import GOOGLE_SCOPES


def main() -> None:
    settings = get_settings()
    workspace_root = Path(__file__).resolve().parents[1]
    client_path = (workspace_root / settings.google_client_secrets_file).resolve()
    token_path = (workspace_root / settings.google_token_file).resolve()
    token_path.parent.mkdir(parents=True, exist_ok=True)

    if not client_path.exists():
        raise SystemExit(
            f"Missing Google OAuth client file: {client_path}\n"
            "Create a Google OAuth Desktop App and place its JSON there first."
        )

    flow = InstalledAppFlow.from_client_secrets_file(str(client_path), GOOGLE_SCOPES)
    creds = flow.run_local_server(port=0, open_browser=True)
    token_path.write_text(creds.to_json(), encoding="utf-8")
    print(f"Google token saved to {token_path}")


if __name__ == "__main__":
    main()