using NSubstitute;
using Schaad.Accounting.Datasets;
using Schaad.Accounting.Services;
using Schaad.Finance.Api;
using Shouldly;

namespace Schaad.Accounting.Tests;

public class FxConverterTestShould
{
    private readonly IFxService fxService = Substitute.For<IFxService>();
    private readonly SettingsDataset settings = new() { DataPath = "", FixerIoApiKey = "test-key" };

    private FxConverter BuildConverter() => new(fxService, settings);

    [Fact]
    public void DelegateToFxServiceWithChfAsTargetAndConfiguredApiKeyWhenConverting()
    {
        fxService.ConvertCurrency(100m, "USD", "CHF", "test-key").Returns(90m);

        var result = BuildConverter().ConvertToChf(100m, "USD");

        result.ShouldBe(90m);
        fxService.Received(1).ConvertCurrency(100m, "USD", "CHF", "test-key");
    }

    [Fact]
    public void PassNegativeAmountsThroughWhenConverting()
    {
        fxService.ConvertCurrency(-50m, "EUR", "CHF", Arg.Any<string>()).Returns(-48m);

        BuildConverter().ConvertToChf(-50m, "EUR").ShouldBe(-48m);
    }
}