// NOWPayments API configuration
export function getNowPaymentsConfig() {
  const isTestnet = process.env.NOWPAYMENTS_TESTNET === 'true'
  
  // For testnet, use sandbox API key if available, otherwise fall back to regular API key
  const apiKey = isTestnet 
    ? (process.env.NOWPAYMENTS_SANDBOX_API_KEY || process.env.NOWPAYMENTS_API_KEY || '')
    : (process.env.NOWPAYMENTS_API_KEY || '')

  // Sandbox/testnet uses api-sandbox.nowpayments.io
  // If the environment variable is not explicitly set, default to production
  const baseUrl = isTestnet
    ? 'https://api-sandbox.nowpayments.io'
    : 'https://api.nowpayments.io'

  // Currency configuration
  // Default: USD for testnet (sandbox doesn't support CHF), CHF for production
  // Can be overridden with NOWPAYMENTS_CURRENCY env variable
  const defaultCurrency = isTestnet ? 'usd' : 'chf'
  const currency = (process.env.NOWPAYMENTS_CURRENCY || defaultCurrency).toLowerCase()

  if (isTestnet) {
    console.log('Using NOWPayments Sandbox/Testnet environment')
  }

  return {
    baseUrl,
    apiKey,
    isTestnet,
    currency,
  }
}