#!/usr/bin/env node
/**
 * W1 补丁 — 2026-04-20 系统自检
 *
 * 问题: SKILL-REGISTRY.md 钩子清单标题声明 "16 注册条目/16 唯一文件"
 *      与 settings.json 实际注册的 17 条 hook 不一致
 *      (stats-compiled.json.summary.hooksRegistered = 17 已确认)
 *
 * 修复方案:
 *   1. 替换 line 255 "## 钩子清单 (16 注册条目/16 唯一文件 ..."  → "17 注册条目/17 唯一文件"
 *   2. 替换 line 257 "### 活跃注册 — settings.json 条目 (16)" → "(17)"
 *
 * 幂等: sentinel = 'REGISTRY_HOOK_COUNT_17_PATCH_2026_04_20'
 * 原子性: .bak 备份 + 临时文件 + rename
 */
'use strict';

const fs = require('fs');
const path = require('path');

const CLAUDE_ROOT = path.join(__dirname, '..', '..');
const TARGET = path.join(CLAUDE_ROOT, 'SKILL-REGISTRY.md');
const BACKUP = TARGET + '.bak';
const TMP = TARGET + '.tmp';
const SENTINEL = 'REGISTRY_HOOK_COUNT_17_PATCH_2026_04_20';

function main() {
  if (!fs.existsSync(TARGET)) {
    console.error('[patch-w1] 目标文件不存在:', TARGET);
    process.exit(1);
  }

  const before = fs.readFileSync(TARGET, 'utf8');

  // 幂等: 检查新值是否已存在且旧值已消失
  const oldTitle = '## 钩子清单 (16 注册条目/16 唯一文件';
  const newTitle = '## 钩子清单 (17 注册条目/17 唯一文件';
  const oldSubtitle = '### 活跃注册 — settings.json 条目 (16)';
  const newSubtitle = '### 活跃注册 — settings.json 条目 (17)';

  if (!before.includes(oldTitle) && before.includes(newTitle)) {
    console.log('[patch-w1] 已打过补丁 (新值已存在，旧值已消失)，跳过');
    process.exit(0);
  }

  if (!before.includes(oldTitle)) {
    console.error('[patch-w1] 找不到旧标题锚点，文件结构已变更:', oldTitle);
    process.exit(2);
  }
  if (!before.includes(oldSubtitle)) {
    console.error('[patch-w1] 找不到旧子标题锚点:', oldSubtitle);
    process.exit(3);
  }

  // 备份
  fs.copyFileSync(TARGET, BACKUP);
  console.log('[patch-w1] 已备份:', BACKUP);

  // 执行替换
  let after = before.replace(oldTitle, newTitle);
  after = after.replace(oldSubtitle, newSubtitle);

  // 验证替换成功
  if (after.includes(oldTitle) || after.includes(oldSubtitle)) {
    console.error('[patch-w1] 替换后仍含旧值，异常中止');
    process.exit(4);
  }
  if (!after.includes(newTitle) || !after.includes(newSubtitle)) {
    console.error('[patch-w1] 替换后缺失新值，异常中止');
    process.exit(5);
  }

  // 原子写: 临时文件 + rename
  fs.writeFileSync(TMP, after, 'utf8');
  fs.renameSync(TMP, TARGET);
  console.log('[patch-w1] 已写入:', TARGET);

  console.log('[patch-w1] 修复完成:');
  console.log('  - 标题:     16 注册条目/16 唯一文件 → 17 注册条目/17 唯一文件');
  console.log('  - 子标题:   活跃注册 settings.json 条目 (16) → (17)');
  console.log('[patch-w1] sentinel:', SENTINEL);
  process.exit(0);
}

main();