54 lines
2.0 KiB
C#
54 lines
2.0 KiB
C#
using System;
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using System.Threading.Tasks;
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using Compliance.Domain.Models;
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using Compliance.DTOs;
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using Compliance.Infrastructure.Repositories;
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using System.Text;
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namespace Compliance.Services.ValidationRules
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{
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public class TaxValidationRule(IDistributorRepository distributorRepository) : IValidationRule
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{
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private readonly IDistributorRepository _distributorRepository = distributorRepository;
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private const string RULE_NAME = "Tax Validation";
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private const string PIS_ERROR = "PIS amount doesn't match the expected value. ";
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private const string COFINS_ERROR = "COFINS amount doesn't match the expected value.";
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private const decimal TOLERANCE = 0.01m;
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public int Priority => 2;
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public async Task<ValidationResult> ValidateAsync(
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BillComplianceRequest request,
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DistributorInformation distributorInfo,
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Client clientInfo)
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{
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var taxInfo = await _distributorRepository.GetTaxInformationAsync(
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request.DistributorName,
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request.Month) ?? throw new InvalidOperationException("Tax information not found");
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var isValid = true;
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var message = new StringBuilder();
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var totalBeforeTaxes = request.TUSDAmount + request.TEAmount;
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var expectedPIS = totalBeforeTaxes * (distributorInfo.PISPercentage / 100);
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var expectedCOFINS = totalBeforeTaxes * (distributorInfo.COFINSPercentage / 100);
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if (Math.Abs(request.PISAmount - expectedPIS) > TOLERANCE)
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{
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isValid = false;
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message.Append(PIS_ERROR);
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}
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if (request.COFINSAmount != expectedCOFINS)
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{
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isValid = false;
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message.Append(COFINS_ERROR);
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}
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return new ValidationResult
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{
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IsValid = isValid,
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RuleName = RULE_NAME,
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Message = message.ToString()
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};
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}
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}
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} |