#!/usr/bin/env python3
"""Stdlib-only silent bootstrap; reserves a new safe receipt before imports."""
import importlib.util
import json
import os
from pathlib import Path
import sys
from datetime import datetime,timezone


def main():
    receipt=None
    fd=None
    try:
        for index,arg in enumerate(sys.argv[1:],start=1):
            if arg=='--receipt' and index+1<len(sys.argv):
                receipt=Path(sys.argv[index+1])
            elif arg.startswith('--receipt='):
                receipt=Path(arg.split('=',1)[1])
        if receipt is None or receipt.is_symlink():
            return 1
        fd=os.open(receipt,os.O_CREAT|os.O_EXCL|os.O_WRONLY,0o600)
        result={'ok':False,'status':'started','stage':'helper_import','recorded_at':datetime.now(timezone.utc).isoformat()}
        os.write(fd,json.dumps(result).encode());os.fsync(fd);os.close(fd);fd=None
        spec=importlib.util.spec_from_file_location('custody_finish',Path(__file__).with_name('root_custody_finish.py'))
        helper=importlib.util.module_from_spec(spec);spec.loader.exec_module(helper)
        return helper.main(receipt_reserved=True)
    except FileExistsError:
        return 1
    except BaseException:
        if receipt is not None:
            try:
                if fd is not None:os.close(fd)
                result={'ok':False,'status':'failed','stage':'helper_import','error_code':'helper_startup_failed','recorded_at':datetime.now(timezone.utc).isoformat()}
                with receipt.open('w') as out:json.dump(result,out);out.flush();os.fsync(out.fileno())
            except Exception:pass
        return 1


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