using AcDream.Core.Rendering;
using Xunit;

namespace AcDream.Core.Tests.Rendering;

public sealed class RenderingDiagnosticsTests
{
    [Fact]
    public void IndoorAll_True_TurnsAllFlagsOn()
    {
        // Reset all flags off first to make the test deterministic
        // regardless of env-var state on the test runner.
        RenderingDiagnostics.ProbeIndoorWalkEnabled   = false;
        RenderingDiagnostics.ProbeIndoorLookupEnabled = false;
        RenderingDiagnostics.ProbeIndoorUploadEnabled = false;
        RenderingDiagnostics.ProbeIndoorXformEnabled  = false;
        RenderingDiagnostics.ProbeIndoorCullEnabled   = false;

        RenderingDiagnostics.IndoorAll = true;

        Assert.True(RenderingDiagnostics.ProbeIndoorWalkEnabled);
        Assert.True(RenderingDiagnostics.ProbeIndoorLookupEnabled);
        Assert.True(RenderingDiagnostics.ProbeIndoorUploadEnabled);
        Assert.True(RenderingDiagnostics.ProbeIndoorXformEnabled);
        Assert.True(RenderingDiagnostics.ProbeIndoorCullEnabled);
        Assert.True(RenderingDiagnostics.IndoorAll);
    }

    [Fact]
    public void IndoorAll_False_TurnsAllFlagsOff()
    {
        RenderingDiagnostics.IndoorAll = true;  // start from all-on
        RenderingDiagnostics.IndoorAll = false;

        Assert.False(RenderingDiagnostics.ProbeIndoorWalkEnabled);
        Assert.False(RenderingDiagnostics.ProbeIndoorLookupEnabled);
        Assert.False(RenderingDiagnostics.ProbeIndoorUploadEnabled);
        Assert.False(RenderingDiagnostics.ProbeIndoorXformEnabled);
        Assert.False(RenderingDiagnostics.ProbeIndoorCullEnabled);
        Assert.False(RenderingDiagnostics.IndoorAll);
    }

    [Fact]
    public void IndoorAll_OneOff_ReadsAsFalse()
    {
        RenderingDiagnostics.IndoorAll = true;
        RenderingDiagnostics.ProbeIndoorCullEnabled = false;  // flip one off
        Assert.False(RenderingDiagnostics.IndoorAll);
    }

    [Theory]
    [InlineData(0x00000029ul, false)]   // outdoor cell 0x29 in 8x8 grid
    [InlineData(0xA9B40029ul, false)]   // outdoor cell with landblock prefix
    [InlineData(0x00000100ul, true)]    // indoor cell minimum
    [InlineData(0x00000105ul, true)]    // typical Holtburg Inn interior
    [InlineData(0xA9B40105ul, true)]    // indoor with landblock prefix
    [InlineData(0xA9B401FFul, true)]    // indoor near top of range
    public void IsEnvCellId_DistinguishesOutdoorVsIndoorByLow16Bits(ulong id, bool expected)
    {
        Assert.Equal(expected, RenderingDiagnostics.IsEnvCellId(id));
    }
}