using ClaudeDo.Data.Models;

namespace ClaudeDo.Data.Tests;

/// The window decides whether a handler session runs unattended, so its edges matter: an
/// off-by-one at midnight would leave an overnight window either always or never open.
public sealed class PowerUseWindowTests
{
    private static TimeOnly T(string hhmm) => TimeOnly.ParseExact(hhmm, "HH:mm");

    [Theory]
    // Plain window, half-open: start included, end excluded.
    [InlineData("09:00", "08:00", "17:00", true)]
    [InlineData("08:00", "08:00", "17:00", true)]
    [InlineData("17:00", "08:00", "17:00", false)]
    [InlineData("07:59", "08:00", "17:00", false)]
    [InlineData("23:30", "08:00", "17:00", false)]
    // Wrap over midnight.
    [InlineData("23:30", "22:00", "07:00", true)]
    [InlineData("00:30", "22:00", "07:00", true)]
    [InlineData("12:00", "22:00", "07:00", false)]
    [InlineData("07:00", "22:00", "07:00", false)]
    public void Contains_BothBoundsSet(string now, string start, string end, bool expected)
        => Assert.Equal(expected, PowerUseWindow.Contains(T(now), T(start), T(end)));

    /// Only one bound is not a window — it must behave exactly like no window, or a half-filled
    /// pair of boxes would silently switch PowerUse off for most of the day.
    [Fact]
    public void Contains_OnlyOneBoundSet_IsAlwaysOpen()
    {
        Assert.True(PowerUseWindow.Contains(T("12:00"), T("22:00"), null));
        Assert.True(PowerUseWindow.Contains(T("12:00"), null, T("07:00")));
        Assert.True(PowerUseWindow.Contains(T("12:00"), null, null));
    }

    [Theory]
    [InlineData("22:00", "22:00")]
    [InlineData(" 07:30 ", "07:30")]
    [InlineData("7:30", null)]
    [InlineData("22:00:00", null)]
    [InlineData("nonsense", null)]
    [InlineData("", null)]
    [InlineData(null, null)]
    public void Normalize_KeepsOnlyExactHhMm(string? input, string? expected)
        => Assert.Equal(expected, PowerUseWindow.Normalize(input));

    [Fact]
    public void IsOpen_UsesTheTimeOfDayOfTheGivenInstant()
    {
        Assert.True(PowerUseWindow.IsOpen(new DateTime(2026, 9, 2, 23, 30, 0), "22:00", "07:00"));
        Assert.False(PowerUseWindow.IsOpen(new DateTime(2026, 9, 2, 12, 0, 0), "22:00", "07:00"));
        Assert.True(PowerUseWindow.IsOpen(new DateTime(2026, 9, 2, 12, 0, 0), null, null));
    }
}