#!/usr/bin/env node
/**
 * patch-x09-cjk-korean-range.js
 * 扩展 context-pressure-monitor.js CJK 检测范围: 0xE3-0xE9 → 0xE4-0xED
 * 包含韩文音节 0xEA-0xED + 修正 0xE3 (日文平假名等非 CJK 汉字)
 *
 * 幂等: SENTINEL 标记
 */
'use strict';
const fs = require('fs');
const path = require('path');

const SENTINEL = '[PATCH-X09-CJK-KOREAN]';
const TARGET = path.join(__dirname, '..', '..', 'hooks', 'context-pressure-monitor.js');

if (!fs.existsSync(TARGET)) { console.log('SKIP: target not found'); process.exit(0); }

let src = fs.readFileSync(TARGET, 'utf8');
if (src.includes(SENTINEL)) { console.log('SKIP: already patched'); process.exit(0); }

const old = "        if (b >= 0xE3 && b <= 0xE9) cjk += 3;";
const replacement = "        if (b >= 0xE4 && b <= 0xED) cjk += 3; // " + SENTINEL;

if (!src.includes(old)) {
  console.error('FAIL: old CJK range not found');
  process.exit(1);
}

src = src.replace(old, replacement);

const tmp = TARGET + '.tmp.' + process.pid;
fs.writeFileSync(tmp, src, 'utf8');
fs.renameSync(tmp, TARGET);

console.log('OK: X09 CJK range extended to 0xE4-0xED (CJK Unified + Korean Syllables)');