function parseOrderInfo(payment) {
  if (payment.paymentParams && typeof payment.paymentParams === 'object') return payment.paymentParams
  if (typeof payment.payMessage !== 'string') return payment.payMessage
  try { return JSON.parse(payment.payMessage) } catch { return payment.payMessage }
}

export function requestAppPayment(payment) {
  if (!payment || payment.payWay !== 'APP') {
    return Promise.reject(new Error('当前订单不是 App 支付订单'))
  }
  const provider = payment.paymentMethod === 'alipay' ? 'alipay' : 'wxpay'
  const orderInfo = parseOrderInfo(payment)
  if (!orderInfo) return Promise.reject(new Error('支付参数为空'))
  return new Promise((resolve, reject) => {
    uni.requestPayment({
      provider,
      orderInfo,
      success: resolve,
      fail: error => reject(new Error(error?.errMsg || '支付未完成'))
    })
  })
}