using Nonemm.Core;

namespace Nonemm.Contests.Tests;

/// Time on and time off, as a sponsor with a rest rule asks for it.
public class OperatingTimeTests
{
    private static readonly DateTime Start = new(2026, 5, 30, 12, 0, 0, DateTimeKind.Utc);

    private static Qso At(int minutes) =>
        TestLog.Contact("OM3XYZ") with { TimestampUtc = Start.AddMinutes(minutes) };

    [Fact]
    public void AGapAsLongAsTheMinimumIsTimeOff() =>
        Assert.Equal(
            TimeSpan.FromMinutes(30),
            OperatingTime.Off([At(0), At(10), At(40), At(50)], TimeSpan.FromMinutes(30)));

    [Fact]
    public void AShorterGapIsTimeOperating() =>
        Assert.Equal(
            TimeSpan.Zero,
            OperatingTime.Off([At(0), At(20), At(40)], TimeSpan.FromMinutes(30)));

    /// The time from the first contact to the last, less the breaks.
    [Fact]
    public void TimeOnIsWhatIsLeftOfTheContest() =>
        Assert.Equal(
            TimeSpan.FromMinutes(20),
            OperatingTime.On([At(0), At(10), At(40), At(50)], TimeSpan.FromMinutes(30)));

    [Fact]
    public void OneContactIsNoTimeAtAll() =>
        Assert.Equal(TimeSpan.Zero, OperatingTime.On([At(0)], TimeSpan.FromMinutes(30)));
}