using Nonemm.Core;

namespace Nonemm.Core.Tests;

public class BandsTests
{
    [Theory]
    [InlineData(1830, "160M")]
    [InlineData(3510.5, "80M")]
    [InlineData(14025, "20M")]
    [InlineData(28499, "10M")]
    [InlineData(50110, "6M")]
    [InlineData(144200, "2M")]
    public void FrequencyLandsOnItsBand(double kilohertz, string expected) =>
        Assert.Equal(expected, Bands.ForFrequency(Frequency.FromKilohertz(kilohertz))?.Name);

    [Fact]
    public void FrequencyOutsideEveryAllocationHasNoBand() =>
        Assert.Null(Bands.ForFrequency(Frequency.FromKilohertz(12000)));

    /// N1MM buckets by whole megahertz, so a contact made past the edge keeps
    /// its band instead of losing it.
    [Theory]
    [InlineData(14400, "20M")]
    [InlineData(7305, "40M")]
    [InlineData(1999.9, "160M")]
    [InlineData(4100, "80M")]
    [InlineData(29800, "10M")]
    [InlineData(21500, "15M")]
    public void FrequencyPastTheBandEdgeStillCountsAsThatBand(double kilohertz, string expected) =>
        Assert.Equal(expected, Bands.ForFrequency(Frequency.FromKilohertz(kilohertz))?.Name);

    /// Below 1 MHz every band shares the same megahertz, so only the real edges
    /// decide.
    [Theory]
    [InlineData(137, "2190M")]
    [InlineData(475, "630M")]
    public void TheLowFrequencyBandsGoByTheirEdges(double kilohertz, string expected) =>
        Assert.Equal(expected, Bands.ForFrequency(Frequency.FromKilohertz(kilohertz))?.Name);

    [Fact]
    public void BroadcastFrequenciesBelowOneMegahertzHaveNoBand() =>
        Assert.Null(Bands.ForFrequency(Frequency.FromKilohertz(900)));

    [Fact]
    public void BandEdgesAreIncluded()
    {
        Assert.Equal("20M", Bands.ForFrequency(Frequency.FromKilohertz(14000))?.Name);
        Assert.Equal("20M", Bands.ForFrequency(Frequency.FromKilohertz(14350))?.Name);
    }

    [Theory]
    [InlineData(1.8, "160M")]
    [InlineData(5, "60M")]
    [InlineData(76000, "4MM")]
    public void N1mmBandLabelFindsTheBand(double label, string expected) =>
        Assert.Equal(expected, Bands.ByLabel(label)?.Name);
}