private async Task <decimal> CalculateAmountForPaymentAsync(SubscribableEdition targetEdition, PaymentPeriodType?periodType, EditionPaymentType editionPaymentType, Tenant tenant)
{
if (editionPaymentType != EditionPaymentType.Upgrade)
{
return(targetEdition.GetPaymentAmount(periodType));
}
if (tenant.EditionId == null)
{
throw new UserFriendlyException(L("CanNotUpgradeSubscriptionSinceTenantHasNoEditionAssigned"));
}
var remainingHoursCount = tenant.CalculateRemainingHoursCount();
if (remainingHoursCount <= 0)
{
return(targetEdition.GetPaymentAmount(periodType));
}
Debug.Assert(tenant.EditionId != null, "tenant.EditionId != null");
var currentEdition = (SubscribableEdition)await _editionManager.GetByIdAsync(tenant.EditionId.Value);
var lastPayment = await _subscriptionPaymentRepository.GetLastCompletedPaymentOrDefaultAsync(tenant.Id, null, null);
if (lastPayment?.PaymentPeriodType == null)
{
throw new ApplicationException("There is no completed payment record !");
}
return(TenantManager.GetUpgradePrice(currentEdition, targetEdition, remainingHoursCount, lastPayment.PaymentPeriodType.Value));
}