#!/usr/bin/env python3
"""
verify_backup.py  –  Ensure the newest tar.gz in ~/backup_demo/archives can be listed.
If corrupt, exits with code 1 so cron can alert.
"""
import subprocess, pathlib, sys, os, glob, datetime

ARCHIVE_DIR = pathlib.Path.home() / "backup_demo" / "archives"
archives = sorted(ARCHIVE_DIR.glob("backup-*.tar.gz"))
if not archives:
    print("No archives found!", file=sys.stderr); sys.exit(1)

latest = archives[-1]
print(f"[+] Verifying {latest.name}")

# `tar -tzf` lists contents — exits non‑zero if archive is bad
result = subprocess.run(
    ["tar", "-tzf", latest], capture_output=True, text=True)

if result.returncode == 0:
    print("[+] Archive OK, sample listing:")
    print(result.stdout.splitlines()[:3])   # show first 3 files
else:
    print("[!] Archive appears corrupt!", file=sys.stderr)
    sys.exit(1)