/**
 * @author huxuejian
 * @date 2025-12-02
 * @description 邮政快递相关业务代码
 */

const crypto = require('crypto');
const dayjs = require('dayjs');
const request = require('../../request');

const domain = process.env.CONFIG_EMS_API_DOMAIN;
const orgId = process.env.CONFIG_EMS_ORGID;
const aesKey = process.env.CONFIG_EMS_AES_Key;
const aesIv = process.env.CONFIG_EMS_AES_IV;

/**
 * AES加密
 * @param {string|object} decryptedData - 待加密的数据（字符串或对象，对象会被转为JSON字符串）
 * @param {string} encryptKey - 加密密钥
 * @param {string} ivKeys - IV向量
 * @returns {string} Base64编码的加密结果
 */
function aesEncrypt(decryptedData, encryptKey, ivKeys) {
  // 如果输入是对象，转换为JSON字符串
  const data = typeof decryptedData === 'string' ? decryptedData : JSON.stringify(decryptedData);

  // 将密钥和IV转换为Buffer（UTF-8编码）
  const key = Buffer.from(encryptKey, 'utf-8');
  const iv = Buffer.from(ivKeys, 'utf-8');

  // 创建加密器（AES-128-CBC模式，PKCS5Padding对应Node.js的默认padding）
  const cipher = crypto.createCipheriv('aes-128-cbc', key, iv);

  // 加密数据
  let encrypted = cipher.update(data, 'utf-8', 'base64');
  encrypted += cipher.final('base64');

  return encrypted;
}

/**
 * AES解密
 * @param {string} encryptedData - Base64编码的加密数据
 * @param {string} encryptKey - 解密密钥
 * @param {string} ivKeys - IV向量
 * @returns {string} 解密后的UTF-8字符串
 */
function aesDecrypt(encryptedData, encryptKey, ivKeys) {
  // 将密钥和IV转换为Buffer（UTF-8编码）
  const key = Buffer.from(encryptKey, 'utf-8');
  const iv = Buffer.from(ivKeys, 'utf-8');

  // 创建解密器（AES-128-CBC模式）
  const decipher = crypto.createDecipheriv('aes-128-cbc', key, iv);

  // 解密数据（先Base64解码，然后解密）
  let decrypted = decipher.update(encryptedData, 'base64', 'utf-8');
  decrypted += decipher.final('utf-8');

  return decrypted;
}

/**
 * MD5摘要算法
 * @param {string} key - 待计算MD5的字符串
 * @returns {string} MD5哈希值（小写十六进制）
 */
function MD5(key) {
  return crypto.createHash('md5').update(key, 'utf-8').digest('hex');
}


exports.createEMSOrder = async function (data) {
  try {
    const params = {
      orgId,
      requestTime: dayjs().format('YYYYMMDDHHmmss'),
      requestData: aesEncrypt(data, aesKey, aesIv),
      tranCode: 'S100001',
    }
    params.sysSign = MD5(`${params.tranCode}${params.requestTime}${aesKey}`);
    const url = `${domain}/lifepayment-easypackage/order/datasync`;
    const res = await request.main(url, params, 'POST');
    if (res && res.responseCode === '0000') {
      const data = aesDecrypt(res.responseData, aesKey, aesIv);
      console.log('解密数据: ', data)
      console.log(typeof data)
      return { success: true, data }
    }
    return { success: true, message: res && res.responseMsg ? res.responseMsg : 'EMS下单失败' }
  } catch (e) {
    return { success: false, message: e.message }
  }
}


exports.emsTest = async function () {
  const data = {
    uleShareUserId: 'yzg10000050008',
    merchatOrderNo: Date.now(),
    paymentAmount: 0.01,
    orderCreateTime: dayjs().format('YYYYMMDDHHmmss'),
    paymentTime: dayjs().format('YYYYMMDDHHmmss'),
    logisticsOrder: '浙江省绍兴市越城区延安东路558号',
    customerName: "胡学俭",
    customerMobile: "17855833126",
    items: [
      {
        itemId: "0001",
        itemName: "测试药品",
        itemPrice: 0.01,
        buyNum: 1
      }
    ]
  }
  return await exports.createEMSOrder(data);
}