using System.Numerics;
using AcDream.App.Rendering.Scene;
using AcDream.App.Rendering.Walk;

namespace AcDream.App.Tests.Rendering.Walk;

public sealed class WalkProductionWorldDataTests
{
    [Fact]
    public void BucketOutdoorRecord_UsesEveryOutdoorPhysicsShadowCellAcrossLandblockEdge()
    {
        RenderProjectionRecord record = Record(
            id: 0x1234u,
            position: new Vector3(191f, 191f, 0f));
        var buckets = new Dictionary<uint, List<RenderProjectionRecord>>();

        WalkProductionWorldData.BucketOutdoorRecord(
            in record,
            [0xF07F0040u, 0xF0800001u, 0xF4180101u],
            buckets,
            renderCenterLbX: 0xF0,
            renderCenterLbY: 0x7F);

        Assert.Equal([0xF07F0040u, 0xF0800001u], buckets.Keys.Order());
        Assert.All(buckets.Values, bucket => Assert.Equal(record, Assert.Single(bucket)));
    }

    [Fact]
    public void BucketOutdoorRecord_UnregisteredEffectFallsBackToRootPositionCell()
    {
        RenderProjectionRecord record = Record(
            id: 0x5678u,
            position: new Vector3(193f, 25f, 0f));
        var buckets = new Dictionary<uint, List<RenderProjectionRecord>>();

        WalkProductionWorldData.BucketOutdoorRecord(
            in record,
            Array.Empty<uint>(),
            buckets,
            renderCenterLbX: 0xEF,
            renderCenterLbY: 0x7F);

        Assert.Equal([0xF07F0002u], buckets.Keys);
        Assert.Equal(record, Assert.Single(buckets[0xF07F0002u]));
    }

    private static RenderProjectionRecord Record(uint id, Vector3 position) =>
        new RenderProjectionRecord() with
        {
            Id = RenderProjectionId.FromRaw(id),
            Transform = new RenderTransform(Matrix4x4.CreateTranslation(position)),
            Source = new RenderSourceMetadata() with { LocalEntityId = id },
        };
}