import { PaymentSDK } from '@cafeblanc/payment-sdk';

const sdk = new PaymentSDK({
  apiKey:        process.env.SDK_API_KEY!,
  signingSecret: process.env.SDK_SIGNING_SECRET!,
  baseUrl:       process.env.PAYMENT_SERVER_URL!, // e.g. https://api.yourplatform.com
});

const result = await sdk.checkout({
  provider:      'portone',
  pgProvider:    'KAKAOPAY',   // SMARTRO_V2 | INICIS | KAKAOPAY | KCP | TOSSPAYMENTS
  orderId:       'order_001',
  amount:        15000,
  currency:      'KRW',
  customerEmail: 'buyer@example.com',
  returnUrl:     'https://yourshop.com/success',
});
// result.channelKey → 프론트 PortOne 브라우저 SDK에 전달
// result.merchantOrderRef → 결제 검증 시 사용

const result = await sdk.verify({
  provider:          'portone',
  orderId:           'order_001',
  providerPaymentId: 'payment_abc123',
  amount:            15000,
  currency:          'KRW',
});
// result.status === 'PAID' → 결제 완료

// 전액 취소
await sdk.cancel({ provider: 'portone', paymentId: 'payment_abc123', reason: '고객 요청' });

// 부분 취소
await sdk.cancel({ provider: 'portone', paymentId: 'payment_abc123', reason: '부분 환불', amount: 5000 });

const payment = await sdk.getPayment({ provider: 'portone', paymentId: 'payment_abc123' });

const { billingKey } = await sdk.issueBillingKey({
  provider:   'portone',
  storeId:    'store-xxxx',
  channelKey: 'channel-key-xxxx',
  customer:   { email: 'user@example.com' },
});

await sdk.payWithBillingKey({
  provider:   'portone',
  paymentId:  `pay_${Date.now()}`,
  billingKey: 'billing-key-xxxx',
  orderName:  '월정액 구독',
  amount:     9900,
  currency:   'KRW',
});

// 방법 A: 프론트 PortOne 브라우저 SDK 완료 후 서버 조회
const result = await sdk.getIdentityVerification({ identityVerificationId: 'iv_001' });

// 방법 B: 서버 주도 OTP 방식
await sdk.sendIdentityVerification({
  identityVerificationId: 'iv_001',
  customer: { name: '홍길동', phoneNumber: '01012345678' },
});
const verified = await sdk.confirmIdentityVerification({ identityVerificationId: 'iv_001', otp: '123456' });
// verified.status === 'VERIFIED'
// verified.name, verified.phone, verified.birthdate, verified.gender, verified.ci

import { SdkError } from '@cafeblanc/payment-sdk';

try {
  await sdk.verify({ ... });
} catch (err) {
  if (err instanceof SdkError) {
    console.error(err.code, err.status, err.requestId);
  }
}