public IOutputDataCredit GetOutputCreditDetails(IInputDataCredit inputDataCredit)
{
if (inputDataCredit == null)
{
throw new ArgumentNullException(nameof(inputDataCredit));
}
var annuityPaymentFactor = inputDataCredit.InterestRateOfYear / 100 / 12;
var amountPayment = GetAmountPayment(inputDataCredit);
var paymentsDetails = new List <IPaymentDetails>(inputDataCredit.CreditTerm);
var date = DateTime.Now.Date;
var balanceDebt = inputDataCredit.SumOfCredit;
for (var j = 0; j < inputDataCredit.CreditTerm; j++)
{
var paymentPercent = balanceDebt * annuityPaymentFactor;
var paymentBody = amountPayment - paymentPercent;
balanceDebt -= paymentBody;
paymentsDetails.Add(new PaymentDetails(
j + 1,
date.ToString("dd/MM/yyyy"),
Math.Round(paymentBody, 2),
Math.Round(paymentPercent, 2),
Math.Round(balanceDebt, 2)
));
date = date.AddMonths(1);
}
return(new OutputDataCredit(paymentsDetails, GetOverPayment(inputDataCredit)));
}
private decimal GetAmountPayment(IInputDataCredit inputDataCredit)
{
var annuityPaymentFactor = inputDataCredit.InterestRateOfYear / 100 / 12;
var creditTerm = inputDataCredit.CreditTerm;
var factor = decimal.ToDouble(annuityPaymentFactor) * Math.Pow(decimal.ToDouble(1 + annuityPaymentFactor), creditTerm) / (Math.Pow(decimal.ToDouble(1 + annuityPaymentFactor), creditTerm) - 1);
return(inputDataCredit.SumOfCredit * (decimal)factor);
}
private decimal GetOverPayment(IInputDataCredit inputDataCredit)
{
return(Math.Round(GetAmountPayment(inputDataCredit) * inputDataCredit.CreditTerm - inputDataCredit.SumOfCredit, 2));
}
