using Centron.Interfaces.DataExchange.BookKeeping;
using Centron.Tests.EndToEnd.Infrastructure;
using Xunit;
using Xunit.Abstractions;

namespace Centron.Tests.EndToEnd.Tests.OldReceiptPriceCalculation;

public class CalculationUtilTests : CentronTest
{
    public CalculationUtilTests(ITestOutputHelper testOutputHelper) 
        : base(testOutputHelper)
    {
    }

    [Theory]
    [InlineData(100.0)]
    [InlineData(150.0)]
    [InlineData(200.0)]
    [InlineData(10.0)]
    [InlineData(6.8)]
    public void Test_CalculationUtils_Back_And_Forth_Calculation(double userEnteredPriceThatIncludesDiscountAlready)
    {
        const int Discount = 10;
        const double CurrencyFactor = 1.0;
        const int Precision = 2;

        // CalculateBasePrice and CalculateNetPrice are basically the back-and-forth calculation of the same value
        // The NetPrice includes the discount, the BasePrice does not
        
        var basePrice = CalculationUtils.CalculateBasePrice(userEnteredPriceThatIncludesDiscountAlready, CurrencyFactor, Discount, Precision);
        var displayedPrice = CalculationUtils.CalculateNetPrice(basePrice, CurrencyFactor, Discount, Precision);

        Assert.Equal(userEnteredPriceThatIncludesDiscountAlready, displayedPrice);
    }
}