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

BACKLOG_PATH="${1:?backlog path required}"

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

text = Path(sys.argv[1]).read_text(encoding='utf-8')
lines = text.splitlines()
inside = False
current_rows = []
for line in lines:
    if line.startswith('## 当前未修复问题速查表'):
        inside = True
        continue
    if inside and line.startswith('---'):
        break
    if inside and line.startswith('|') and not line.startswith('| #') and not line.startswith('|---'):
        current_rows.append(line)

matches = re.findall(r'freshness_hint=same-day-blocker-switch old=([^ ]+) new=([^\n ]+)', text)
for old, new in matches:
    old_variants = {
        old.lower(),
        old.replace('-', ' ').lower(),
        old.replace(' ', '-').lower(),
    }
    for row in current_rows:
        row_lower = row.lower()
        if any(variant and variant in row_lower for variant in old_variants):
            print('stale blocker still present in current table', file=sys.stderr)
            raise SystemExit(1)
print('BACKLOG_BLOCKER_FRESHNESS_GUARD: PASS')
PY