42 lines
1.4 KiB
C#
42 lines
1.4 KiB
C#
namespace TaxCalculator.Api.Services
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{
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using Domain;
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using TaxCalculator.Models;
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public class SalaryService : ISalaryService
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{
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private readonly ITaxCalculatorService _taxCalculator;
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public SalaryService(ITaxCalculatorService taxCalculator)
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{
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_taxCalculator = taxCalculator ?? throw new ArgumentNullException(nameof(taxCalculator));
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}
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public async Task<SalaryDetails> CalculateSalaryDetails(int grossAnnualSalary)
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{
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if (grossAnnualSalary < 0)
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{
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throw new ArgumentException("Gross annual salary must be non-negative.");
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}
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// Calculate tax once
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decimal annualTax = await _taxCalculator.CalculateTax(grossAnnualSalary);
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decimal netAnnualSalary = grossAnnualSalary - annualTax;
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decimal grossMonthlySalary = (decimal)grossAnnualSalary / 12;
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decimal netMonthlySalary = netAnnualSalary / 12;
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decimal monthlyTaxPaid = annualTax / 12;
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return new SalaryDetails
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{
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GrossAnnualSalary = grossAnnualSalary,
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GrossMonthlySalary = Math.Round(grossMonthlySalary, 2),
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NetAnnualSalary = netAnnualSalary,
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NetMonthlySalary = Math.Round(netMonthlySalary, 2),
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AnnualTaxPaid = annualTax,
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MonthlyTaxPaid = Math.Round(monthlyTaxPaid, 2)
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};
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}
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}
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}
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