#!/usr/bin/env bash
set -euo pipefail

BACKLOG_PATH="${1:?backlog path required}"
NOW_RAW="${LLM_NOW:-$(date '+%Y-%m-%d %H:%M')}"

python3 - <<'PY' "$BACKLOG_PATH" "$NOW_RAW"
from pathlib import Path
from datetime import datetime
import re
import sys

text = Path(sys.argv[1]).read_text(encoding='utf-8')
now = datetime.strptime(sys.argv[2], '%Y-%m-%d %H:%M')
match = re.search(r'## 当前未修复问题速查表（截至 ([0-9]{4}-[0-9]{2}-[0-9]{2} [0-9]{2}:[0-9]{2})）', text)
if not match:
    print('missing current table timestamp', file=sys.stderr)
    raise SystemExit(1)
seen = datetime.strptime(match.group(1), '%Y-%m-%d %H:%M')
age_minutes = int((now - seen).total_seconds() // 60)
if age_minutes > 180:
    print('stale current truth snapshot', file=sys.stderr)
    raise SystemExit(1)
print(f'BACKLOG_FRESHNESS age_minutes={age_minutes} status=fresh')
PY