/**
 * bump-version.js — 构建时自动递增 package.json 版本号
 * 用法: node scripts/bump-version.js [patch|minor|major]
 *       默认 patch，每次 npm run build 前自动执行 +0.0.1
 */
const fs = require('fs');
const path = require('path');

const pkgPath = path.resolve(__dirname, '..', 'package.json');
const pkg = JSON.parse(fs.readFileSync(pkgPath, 'utf-8'));

const current = pkg.version;
const parts = current.split('.').map(Number);
if (parts.length !== 3 || parts.some(isNaN)) {
  console.error(`[bump-version] 无效版本号: ${current}`);
  process.exit(1);
}

const type = process.argv[2] || 'patch';
switch (type) {
  case 'major':
    parts[0] += 1;
    parts[1] = 0;
    parts[2] = 0;
    break;
  case 'minor':
    parts[1] += 1;
    parts[2] = 0;
    break;
  case 'patch':
  default:
    parts[2] += 1;
    break;
}

const next = parts.join('.');
pkg.version = next;
fs.writeFileSync(pkgPath, JSON.stringify(pkg, null, 2) + '\n', 'utf-8');

console.log(`[bump-version] ${current} → ${next}`);