#!/usr/bin/env node
/**
 * patch-r5-merge-matcher.js · 2026-04-26
 * 合并 agent-isolation-gate.js 的 3 个独立 PreToolUse 注册 (Bash/Write/Edit)
 * 为单一 matcher 'Bash|Write|Edit', 减少 hook 启动开销 3x → 1x
 *
 * Idempotent: 检测合并后的单一条目存在则跳过
 * 操作 settings.json AST (JSON.parse), 不用文本替换防破坏
 */
'use strict';
const fs = require('fs');
const path = require('path');

const SETTINGS = path.join(process.env.HOME || process.env.USERPROFILE || 'C:/Users/leesu', '.claude', 'settings.json');
const GATE_CMD = 'node C:/Users/leesu/.claude/hooks/agent-isolation-gate.js';
const MERGED_MATCHER = 'Bash|Write|Edit';

try {
  const raw = fs.readFileSync(SETTINGS, 'utf8');
  const cfg = JSON.parse(raw);
  const pre = (cfg.hooks && cfg.hooks.PreToolUse) || [];

  // 找出 agent-isolation-gate 相关条目
  const gateIdx = [];
  pre.forEach((entry, i) => {
    const cmds = (entry.hooks || []).map(h => h.command || '');
    if (cmds.some(c => c.includes('agent-isolation-gate.js'))) gateIdx.push(i);
  });

  if (gateIdx.length === 0) {
    console.error('[r5-merge] no agent-isolation-gate entries found, abort');
    process.exit(1);
  }
  if (gateIdx.length === 1 && pre[gateIdx[0]].matcher === MERGED_MATCHER) {
    console.log('[r5-merge] already applied, skip');
    process.exit(0);
  }

  fs.writeFileSync(SETTINGS + '.bak.r5merge.' + Date.now(), raw, 'utf8');

  // 删除所有旧条目, 在第一个位置插入合并条目
  const merged = {
    matcher: MERGED_MATCHER,
    hooks: [{
      type: 'command',
      command: GATE_CMD,
      timeout: 1500
    }]
  };
  // 倒序删除
  const sortedDesc = [...gateIdx].sort((a, b) => b - a);
  const insertAt = gateIdx[0];
  for (const i of sortedDesc) pre.splice(i, 1);
  pre.splice(insertAt, 0, merged);

  fs.writeFileSync(SETTINGS, JSON.stringify(cfg, null, 2), 'utf8');
  console.log('[r5-merge] applied (merged ' + gateIdx.length + ' entries → 1)');
} catch (e) {
  console.error('[r5-merge] error:', e.message);
  process.exit(1);
}