import { config } from 'dotenv';
import { resolve, dirname } from 'path';
import { fileURLToPath } from 'url';
import crypto from 'crypto';

const __dirname = dirname(fileURLToPath(import.meta.url));
config({ path: resolve(__dirname, '.env') });

const { AlipaySdk } = await import('alipay-sdk');

const appId = process.env.ALIPAY_APP_ID;
const rawPrivateKey = process.env.ALIPAY_PRIVATE_KEY;
const rawPublicKey = process.env.ALIPAY_PUBLIC_KEY;

// 转 PKCS#1 PEM
const pkcs8Buf = Buffer.from(rawPrivateKey, 'base64');
const privObj = crypto.createPrivateKey({ key: pkcs8Buf, format: 'der', type: 'pkcs8' });
const pkcs1Pem = privObj.export({ format: 'pem', type: 'pkcs1' });

const alipayPubPem = rawPublicKey.includes('BEGIN')
  ? rawPublicKey
  : `-----BEGIN PUBLIC KEY-----\n${rawPublicKey}\n-----END PUBLIC KEY-----`;

// 用户应用公钥
const userAppPubKey = 'MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAu/fGftv/79Cj7MEonMxcv6Br+zPfRQoEOJ4eIvxfDrVg7N+/k7P+Rw9CaOMMYK5Shy7VJrBAx9oV59v9PMI9FdnAzYFHtiKzjq6ZmolZwXM44pZoXlGQ7ZxtuiN/FshN74me80OWXzU3FcUR9YG6UguddvdtlYvZRUScnCJabbys7KL9dUbRNvTQ6CnD8U6OoDGveISxFbA0aCa6BgZRo8Nuz28p8HYHI2+FEWnFDuE/GRU57mGXk8mR6siReNVlCMEX80Uq5RVG+6EXxeCwtt3lxCwE7aS/tvGOZOAsgOriDjyidNgrJgoPlY2Mb1fyRMPLJZvyFCYiwH46MvL39wIDAQAB';

// 方式1: SDK 签名
const sdk = new AlipaySdk({
  appId,
  privateKey: pkcs1Pem,
  keyType: 'PKCS1',
  alipayPublicKey: alipayPubPem,
  signType: 'RSA2',
});

const orderNo = 'DIAG' + Date.now();
const form = sdk.pageExecute('alipay.trade.wap.pay', 'POST', {
  bizContent: {
    out_trade_no: orderNo,
    total_amount: '0.01',
    subject: '诊断测试',
    product_code: 'QUICK_WAP_WAY',
  },
  returnUrl: 'https://book.rrbrr.com/#/pages/payment-result/index',
  notifyUrl: 'https://book.rrbrr.com/api/payment/alipay/notify',
});

const formStr = String(form);
const sdkSign = formStr.match(/sign=([^"&\s]+)/)?.[1] || '';
console.log('SDK签名(前80):', sdkSign.substring(0, 80));
console.log('SDK签名长度:', sdkSign.length);

// 从URL中提取验签字符串
const actionUrl = formStr.match(/action="([^"]+)"/)?.[1] || '';
const urlParams = new URL(actionUrl);
const paramMap = {};
urlParams.searchParams.forEach((v, k) => {
  if (k !== 'sign') paramMap[k] = v;
});

// 构建验签字符串（按支付宝规则：参数排序后用&连接）
const sortedParams = Object.keys(paramMap).sort().map(k => `${k}=${paramMap[k]}`).join('&');
const signString = decodeURIComponent(sortedParams);
console.log('\nSDK生成的验签字符串:', signString.substring(0, 200));

// 方式2: 手动RSA2签名
const decoder = new TextDecoder();
const signStrBytes = new TextEncoder().encode(signString);
const sign2 = crypto.createSign('RSA-SHA256');
sign2.update(signString);
const manualSign = sign2.sign(pkcs1Pem, 'base64');
console.log('\n手动签名(前80):', manualSign.substring(0, 80));
console.log('手动签名长度:', manualSign.length);
console.log('SDK签名 vs 手动签名:', sdkSign === manualSign ? '✅ 一致' : '❌ 不一致');

// 方案3: 转成URL-safe base64后比较
function toUrlSafe(b64) {
  return b64.replace(/\+/g, '-').replace(/\//g, '_').replace(/=+$/, '');
}
console.log('\nURL-safe签名比较:');
console.log('SDK:', toUrlSafe(sdkSign.substring(0, 50)));
console.log('手动:', toUrlSafe(manualSign.substring(0, 50)));
console.log('匹配:', toUrlSafe(sdkSign) === toUrlSafe(manualSign));

// 方式4: 用应用公钥验SDK签名
const appPubObj = crypto.createPublicKey({
  key: Buffer.from(userAppPubKey, 'base64'),
  format: 'der', type: 'spki'
});
const appPubPem = appPubObj.export({ format: 'pem', type: 'spki' });

const verifySdk = crypto.createVerify('RSA-SHA256');
verifySdk.update(signString);
const sdkVerified = verifySdk.verify(appPubPem, Buffer.from(decodeURIComponent(sdkSign), 'base64'), 'base64');
console.log('\n用应用公钥验SDK签名:', sdkVerified ? '✅ 通过' : '❌ 失败');

const verifyManual = crypto.createVerify('RSA-SHA256');
verifyManual.update(signString);
const manualVerified = verifyManual.verify(appPubPem, Buffer.from(manualSign, 'base64'), 'base64');
console.log('用应用公钥验手动签名:', manualVerified ? '✅ 通过' : '❌ 失败');

// 方式5: 直接用curl(v3)试
console.log('\n=== 用 curl(v3) 方式测试 ===');
try {
  const result = await sdk.curl('POST', '/v3/alipay/trade/precreate', {
    body: {
      out_trade_no: orderNo + 'C',
      total_amount: '0.01',
      subject: 'curl测试',
    },
    timeout: 10000,
  });
  console.log('curl结果:', JSON.stringify(result).substring(0, 300));
} catch (e) {
  console.log('curl错误:', e.message);
}