public SelfEmployeeCalculation(SelfEmployeeCalculationContext calculationContext)
{
if (calculationContext == null)
{
throw new ArgumentNullException(nameof(calculationContext));
}
if (calculationContext.BaseAmount < 0)
{
throw new ArgumentOutOfRangeException(nameof(calculationContext.BaseAmount));
}
if (calculationContext.IncomeCost < 0)
{
throw new ArgumentOutOfRangeException(nameof(calculationContext.IncomeCost));
}
this.Id = Guid.NewGuid();
CalculateVatAmount(calculationContext);
this.TaxBaseAmount = CalculateTaxBaseAmount(calculationContext.BaseAmount, calculationContext.IsGross);
this.IncomeCostsAmount = calculationContext.IncomeCost;
this.Month = calculationContext.Month;
AddInsuranceContribution(calculationContext.InsuranceContributionContext);
CalculateMonthlyBaseAmount(calculationContext);
CalculateIncomeTax(calculationContext);
CalculateNetPay(calculationContext);
CalculateNetPayEstimate(calculationContext);
}
private void CalculateNetPay(SelfEmployeeCalculationContext context)
{
this.NetPay = this.TaxBaseAmount -
this.InsuranceContribution.InsuranceContributionsSum() -
this.TaxAmount -
this.IncomeCostsAmount;
}
private void CalculateVatAmount(SelfEmployeeCalculationContext calculationContext)
{
//TODO Add vat rate to command and context
if (calculationContext.IsGross)
{
this.VatAmount = Math.Round((calculationContext.BaseAmount - (calculationContext.BaseAmount / (1 + calculationContext.VatTaxRate))), 2);
}
else
{
this.VatAmount = Math.Round((calculationContext.BaseAmount * calculationContext.VatTaxRate), 2);
}
}
private void CalculateIncomeTax(SelfEmployeeCalculationContext calculationContext)
{
if (this.BaseAmount <= 0)
{
this.TaxAmount = 0;
}
else
{
if (calculationContext.TaxationForm == TaxationForm.LINEAR)
{
calculationContext.MonthlyTaxFreeAmount = 0;
}
this.TaxAmount = Math.Round(calculationContext.IncomeTaxAmmount.Invoke(CreateTaxCalculationContext(calculationContext)) - (this.InsuranceContribution.HealthInsuranceDiscount + calculationContext.MonthlyTaxFreeAmount), 0);
}
}
private SelfEmployeeCalculationContext CreateSelfEmployeeCalculationContext(SelfEmployeeCalculationCommand request)
{
SelfEmployeeCalculationContext context = new SelfEmployeeCalculationContext()
{
BaseAmount = request.Salary,
IncomeCost = request.IncomeCosts,
IncomeTaxAmmount = _taxCalculator.Calculate,
InsuranceContributionContext = _insuranceContributionService.Create(request.InsuranceContributionForm, request.AccidentContributionPercentage, request.IsMedicalInsurance),
IsMedicalInsurance = request.IsMedicalInsurance,
Month = (Month)DateTime.Today.Month,
PreviusMonthsIncome = request.PreviousMonthsIncomes,
TaxationForm = request.TaxationForm,
IsGross = request.IsGross,
VatTaxRate = GetValue(VATKEY),
MonthlyTaxFreeAmount = GetValue(MONTHLYTAXFREEAMOUNTKEY)
};
return(context);
}
private void CalculateMonthlyBaseAmount(SelfEmployeeCalculationContext context)
{
this.BaseAmount = Math.Round(this.TaxBaseAmount - this.IncomeCostsAmount -
this.InsuranceContribution.SocialInsuranceContributionSum(), 0);
}
private TaxCalculationContext CreateTaxCalculationContext(SelfEmployeeCalculationContext calculationContext)
{
return(new TaxCalculationContext(calculationContext.PreviusMonthsIncome, this.BaseAmount, calculationContext.TaxationForm));
}
