// Example for creating a deposit with Promptpay
const crypto = require('crypto');
const axios = require('axios');

// Your merchant credentials
const merchantId = 'MERCHANT_DEV_20250522_ABCDEFGHIJKLMN';
const apiKey = 'YOUR_API_KEY'; // x-api-key header value
const secretKey = 'YOUR_MERCHANT_SECRET_KEY'; // For signature generation

// Prepare deposit data
const depositData = {
  merchant_id: merchantId,
  amount: 1000,
  currency: 'THB',
  reference: 'ORD' + Math.floor(1000000 + Math.random() * 9000000),
  payment_method: 'promptpay',
  frontend_return_url: 'https://example.com/return',
  backend_return_url: 'https://example.com/webhook',
  timestamp: new Date().toISOString()
};

// Generate signature
function generateSignature(data, secretKey) {
  const sortedKeys = Object.keys(data).sort();
  const values = {};
  
  for (const key of sortedKeys) {
    values[key] = String(data[key]);
  }
  
  const queryString = new URLSearchParams(values).toString();
  const hmac = crypto.createHmac('sha256', secretKey);
  hmac.update(queryString);
  return hmac.digest('hex');
}

// Add signature to request data
depositData.signature = generateSignature(depositData, secretKey);

// Make API request
async function createDeposit() {
  try {
    const response = await axios.post(
      'https://api-dev.fundpay.app/api/v1/deposit',
      depositData,
      {
        headers: {
          'Content-Type': 'application/json',
          'x-api-key': apiKey
        }
      }
    );
    
    console.log('Deposit created:', response.data);
    
    // Redirect user to payment page if successful
    if (response.data.code === 200 && response.data.data.payment_url) {
      window.location.href = response.data.data.payment_url;
    }
  } catch (error) {
    console.error('Error creating deposit:', error.response?.data || error.message);
  }
}

createDeposit();