using Nonemm.Core;

namespace Nonemm.Spotting.Tests;

public class QsxTests
{
    private static readonly Frequency Spot = Frequency.FromKilohertz(14_025);

    private static double Kilohertz(string comment) => Qsx.Parse(comment, Spot).Kilohertz;

    [Fact]
    public void AWholeFrequencyAfterQsxIsTakenAsItIs() =>
        Assert.Equal(14_205, Kilohertz("QSX 14205"));

    [Fact]
    public void ABareNumberAfterQsxIsKilohertzInTheBand() =>
        Assert.Equal(14_205, Kilohertz("QSX 205"));

    [Fact]
    public void UpAndDownAreOffsetsFromTheSpot()
    {
        Assert.Equal(14_027, Kilohertz("UP 2"));
        Assert.Equal(14_020, Kilohertz("DN 5"));
        Assert.Equal(14_020, Kilohertz("DOWN 5"));
    }

    [Fact]
    public void ACommentThatSaysNothingAboutSplitGivesNothing()
    {
        Assert.Equal(0, Kilohertz("CQ TEST"));
        Assert.Equal(0, Kilohertz(""));
    }

    [Fact]
    public void AGridSquareIsNotAnOffset() =>
        Assert.Equal(0, Kilohertz("TNX QSO DN70"));

    [Fact]
    public void AWordThatOnlyHoldsTheLettersIsNotAnOffset() =>
        Assert.Equal(0, Kilohertz("GROUP 5"));

    [Fact]
    public void ABigNumberAfterAnythingButQsxIsNotAnOffset() =>
        Assert.Equal(0, Kilohertz("UP 14205"));

    [Fact]
    public void AListeningFrequencyOutsideTheBandIsDropped() =>
        Assert.Equal(0, Kilohertz("QSX 7205"));

    [Fact]
    public void TheSpotLineCarriesTheListeningFrequency()
    {
        Spot? spot = SpotLine.Parse(
            "DX de W3LPL:     14025.0  JA1XYZ       UP 2                   1234Z",
            new DateTime(2026, 8, 28, 12, 0, 0, DateTimeKind.Utc));

        Assert.Equal(14_027_000, Assert.IsType<Spot>(spot).Qsx.Hertz);
        Assert.True(spot.IsSplit);
    }
}