using System.Collections.Generic;
using AcDream.App.Streaming;
using AcDream.Core.Terrain;
using AcDream.Core.World;
using Xunit;

namespace AcDream.Core.Tests.Streaming;

public class StreamingControllerTwoTierTests
{
    [Fact]
    public void Tick_FirstCall_EnqueuesNearAndFarLoadsByTier()
    {
        var loads = new List<(uint Id, LandblockStreamJobKind Kind)>();
        var unloads = new List<uint>();
        var state = new GpuWorldState();

        var ctrl = new StreamingController(
            enqueueLoad: (id, kind) => loads.Add((id, kind)),
            enqueueUnload: unloads.Add,
            drainCompletions: _ => System.Array.Empty<LandblockStreamResult>(),
            applyTerrain: (_, _) => { },
            state: state,
            nearRadius: 1,
            farRadius: 3);

        ctrl.Tick(observerCx: 100, observerCy: 100);

        int nearCount = 0, farCount = 0;
        foreach (var (_, kind) in loads)
        {
            if (kind == LandblockStreamJobKind.LoadNear) nearCount++;
            else if (kind == LandblockStreamJobKind.LoadFar) farCount++;
        }
        Assert.Equal(9, nearCount);   // 3x3 inner ring (radius=1)
        Assert.Equal(40, farCount);   // 7x7 - 3x3 outer ring (radius=3)
    }
}