using OpenTK.Mathematics;
using VoxelEngine.Core;
using VoxelEngine.World.Blocks;
using VoxelChunk = VoxelEngine.World.Chunk.Chunk;

namespace VoxelEngine.World.WorldGen;

// Carves caves into an already-terrain-filled chunk. Stateless after
// construction; the carve methods are pure functions of (chunk, chunkPos).
// Safe to share across worker threads.
public sealed class CaveCarver
{
    private readonly int _seed;
    private readonly BlockRegistry _blocks;
    private readonly Configuration _cfg;
    private readonly FastNoiseLite _caveNoise;

    public CaveCarver(int seed, BlockRegistry blocks, Configuration cfg)
    {
        this._seed = seed;
        this._blocks = blocks;
        this._cfg = cfg;

        this._caveNoise = new FastNoiseLite(seed + 100);
        this._caveNoise.SetNoiseType(FastNoiseLite.NoiseType.OpenSimplex2);
        this._caveNoise.SetFrequency(cfg.CaveNoiseFrequency);
    }

    public void Carve(VoxelChunk chunk, Vector3i chunkPos)
    {
        // Implemented in Tasks 5 and 6.
    }
}