using System;
using AcDream.Core.World;
using Xunit;

namespace AcDream.Core.Tests.World;

public sealed class WorldTimeDebugTests
{
    [Fact]
    public void SetDebugTime_OverridesDayFraction()
    {
        var service = new WorldTimeService(SkyStateProvider.Default());
        service.SyncFromServer(0);  // midnight

        service.SetDebugTime(0.5f);   // force noon
        Assert.InRange(service.DayFraction, 0.499, 0.501);
    }

    [Fact]
    public void ClearDebugTime_RestoresServerTime()
    {
        var service = new WorldTimeService(SkyStateProvider.Default());
        service.SyncFromServer(DerethDateTime.DayTicks * 0.25); // dawn
        service.SetDebugTime(0.5f);
        service.ClearDebugTime();

        Assert.InRange(service.DayFraction, 0.24, 0.26);
    }

    [Fact]
    public void SyncFromServer_ClearsDebugOverride()
    {
        var service = new WorldTimeService(SkyStateProvider.Default());
        service.SetDebugTime(0.75f);
        service.SyncFromServer(0);  // midnight — this should clear the override

        Assert.InRange(service.DayFraction, 0.0, 0.01);
    }

    [Fact]
    public void SetProvider_AcceptsNewKeyframes()
    {
        var service = new WorldTimeService(SkyStateProvider.Default());
        var custom = new SkyStateProvider(new[]
        {
            new SkyKeyframe(
                Begin: 0f,
                SunHeadingDeg: 0f,
                SunPitchDeg: 90f,
                SunColor: System.Numerics.Vector3.One,
                AmbientColor: System.Numerics.Vector3.One,
                FogColor: System.Numerics.Vector3.Zero,
                FogDensity: 0f),
        });
        service.SetProvider(custom);
        Assert.Equal(1, custom.KeyframeCount);
    }
}