const express = require('express');
const db = require('../config/database');
const { authenticate } = require('../middleware/auth');
const { asyncHandler, AppError } = require('../middleware/errorHandler');

const router = express.Router();

// 转义 SQL LIKE 特殊字符
function escapeLikePattern(str) {
  return str.replace(/[%_\\]/g, '\\$&');
}

// 搜索账目
router.get('/', authenticate, asyncHandler(async (req, res) => {
  const { q } = req.query;

  if (!q) {
    throw new AppError('请输入搜索关键词', 400, 'MISSING_QUERY');
  }

  const escapedQ = escapeLikePattern(q);
  const stmt = db.prepare(`
    SELECT * FROM records
    WHERE user_id = ? AND (category LIKE ? ESCAPE '\\' OR note LIKE ? ESCAPE '\\')
    ORDER BY date DESC, id DESC
    LIMIT 50
  `);

  const records = stmt.all(req.userId, `%${escapedQ}%`, `%${escapedQ}%`);
  res.json(records);
}));

module.exports = router;