using NUnit.Framework;
using ProjectM.Simulation;
using Unity.Mathematics;

namespace ProjectM.Tests
{
    /// <summary>
    /// Unit tests for the LANTERN light-as-territory relevancy DECISION (LightRelevancyMath). The full per-connection
    /// GhostRelevancy set population is netcode-world (the L3 gamma test); this pins the pure planar-distance rule.
    /// </summary>
    public class LightRelevancyMathTests
    {
        [Test]
        public void InsideLamp_IsVisible()
        {
            float r = LightRelevancyMath.LampRadiusDefault;
            Assert.IsFalse(LightRelevancyMath.IsHidden(float3.zero, new float3(r - 1f, 0f, 0f), r * r), "just inside the radius = visible");
            Assert.IsFalse(LightRelevancyMath.IsHidden(float3.zero, float3.zero, r * r), "at the player = visible");
        }

        [Test]
        public void OutsideLamp_IsHidden()
        {
            float r = LightRelevancyMath.LampRadiusDefault;
            Assert.IsTrue(LightRelevancyMath.IsHidden(float3.zero, new float3(r + 1f, 0f, 0f), r * r), "just beyond the radius = hidden (nothing to see)");
        }

        [Test]
        public void Planar_IgnoresY()
        {
            float r = 5f;
            // Within the planar (XZ) radius but far in Y is still VISIBLE — top-down relevancy ignores height.
            Assert.IsFalse(LightRelevancyMath.IsHidden(float3.zero, new float3(2f, 1000f, 2f), r * r), "Y is ignored (planar XZ test)");
        }
    }
}