using Recordingtest.Bridge;
using Recordingtest.Hmeg.Bridge;
using Xunit;

namespace Recordingtest.Hmeg.Bridge.Tests;

public class HmegDirectStateProviderTests
{
    [Fact]
    public void NullLambdas_Return_SafeDefaults_NoThrow()
    {
        var p = new HmegDirectStateProvider(
            spaceProvider: () => null,
            viewportProvider: () => null);

        Assert.Empty(p.GetSelectedIds());

        var c = p.GetCamera();
        Assert.Equal(45.0, c.Fov);
        Assert.Equal(new double[] { 0, 0, 1 }, c.Up);

        var s = p.GetScene();
        Assert.Equal(0, s.ObjectCount);
        Assert.Null(s.DocumentPath);

        Assert.True(p.GetRenderComplete());
    }

    [Fact]
    public void Throwing_Lambdas_Are_Swallowed_Returns_SafeDefaults()
    {
        var p = new HmegDirectStateProvider(
            spaceProvider: () => throw new InvalidOperationException("boom"),
            viewportProvider: () => throw new InvalidOperationException("boom"));

        Assert.Empty(p.GetSelectedIds());
        var c = p.GetCamera();
        Assert.Equal(45.0, c.Fov);
        var s = p.GetScene();
        Assert.Equal(0, s.ObjectCount);
    }

    [Fact]
    public void DocumentPathProvider_Is_Used_For_Scene()
    {
        var p = new HmegDirectStateProvider(
            spaceProvider: () => null,
            viewportProvider: () => null,
            documentPathProvider: () => "C:/sample.hmeg");
        var s = p.GetScene();
        Assert.Equal("C:/sample.hmeg", s.DocumentPath);
    }

    [Fact]
    public void DocumentPathProvider_Throwing_Is_Swallowed()
    {
        var p = new HmegDirectStateProvider(
            spaceProvider: () => null,
            viewportProvider: () => null,
            documentPathProvider: () => throw new InvalidOperationException());
        var s = p.GetScene();
        Assert.Null(s.DocumentPath);
    }

    [Fact]
    public void Constructor_Throws_OnNullProviders()
    {
        Assert.Throws<ArgumentNullException>(() =>
            new HmegDirectStateProvider(null!, () => null));
        Assert.Throws<ArgumentNullException>(() =>
            new HmegDirectStateProvider(() => null, null!));
    }
}