using System.Numerics;
using AcDream.Core.Physics;
using Xunit;

namespace AcDream.Core.Tests.Physics;

public class CellTransitFindCellListTests
{
    [Fact]
    public void IndoorSeed_NoCacheEntry_ReturnsFallback()
    {
        var cache = new PhysicsDataCache();
        // Indoor seed but cell not cached → FindCellList early-returns the fallback.
        uint result = CellTransit.FindCellList(
            cache,
            worldSphereCenter: Vector3.Zero,
            sphereRadius: 0.5f,
            currentCellId: 0xA9B40100u);

        Assert.Equal(0xA9B40100u, result);
    }

    [Fact]
    public void OutdoorSeed_Returns_FallbackWhenNoCellBSPs()
    {
        var cache = new PhysicsDataCache();
        // Outdoor seed: AddAllOutsideCells adds landcell candidates, but they
        // have no CellPhysics (only EnvCells get cached) → containment loop
        // finds no winner → fall back.
        uint result = CellTransit.FindCellList(
            cache,
            worldSphereCenter: new Vector3(12f, 12f, 0f),
            sphereRadius: 0.5f,
            currentCellId: 0xA9B40001u);

        Assert.Equal(0xA9B40001u, result);
    }
}