namespace Voxel
{
    public class Chunk
    {
        public readonly int Size = 16;
        public readonly int Height = 256;
        public readonly int PositionX;
        public readonly int PositionY;

        private Dictionary<ushort, BlockData> _blockData;
        private byte[] _blocks;

        public Chunk(int positionX, int positionY)
        {
            PositionX = positionX;
            PositionY = positionY;

            _blockData = new Dictionary<ushort, BlockData>();
            _blocks = new byte[Size * Size * Height];

            Initialize();
        }

        public void SetBlock(int x, int y, int z, byte blockId)
        {
            int i = GetBlockIndex(x, y, z);
            _blocks[i] = blockId;
        }

        public byte GetBlock(int x, int y, int z)
        {
            int i = GetBlockIndex(x, y, z);
            return _blocks[i];
        }

        public BlockData GetBlockData(int x, int y, int z)
        {
            return new BlockData();
        }

        private void Initialize()
        {
            for (int x = 0; x < Size; x++)
            {
                for (int z = 0; z < Size; z++)
                {
                    for (int y = 0; y < Size; y++)
                    {
                        byte blockId = 1;
                        SetBlock(x, y, z, blockId);
                        Console.WriteLine(
                            "Set block "
                            + x.ToString() + ", "
                            + y.ToString() + ", "
                            + z.ToString() + " "
                        );
                    }
                }
            }
        }

        // todo
        public (int x, int y, int z) IndexToPosition(int i)
        {
            int x = 0;
            int y = 0;
            int z = 0;

            return (x, y, z);
        }

        private int GetBlockIndex(int x, int y, int z)
        {
            return x + y * Size + z * Size * Size;
        }

        public List<FaceData> GetFaces()
        {
            List<FaceData> list = new List<FaceData>();

            for (byte i = 0; i < 6; i++)
            {
                FaceData faceData = new FaceData();

                faceData.Facing = (Orientation)i;

                list.Add(faceData);
            }

            for (byte i = 0; i < 6; i++)
            {
                FaceData faceData = new FaceData();

                faceData.Facing = (Orientation)i;

                faceData.X = 1;

                list.Add(faceData);
            }

            for (byte i = 0; i < 6; i++)
            {
                FaceData faceData = new FaceData();

                faceData.Facing = (Orientation)i;


                faceData.X = 1;
                faceData.Y = 1;
                faceData.Z = 1;

                list.Add(faceData);
            }

            for (byte i = 0; i < 6; i++)
            {
                FaceData faceData = new FaceData();

                faceData.Facing = (Orientation)i;


                faceData.X = 1;
                faceData.Y = 2;
                faceData.Z = 1;

                list.Add(faceData);
            }

            for (int x = 0; x < Size; x++)
            {
                for (int z = 0; z < Size; z++)
                {
                    for (int y = 0; y < Height; y++)
                    {
                        for (byte i = 0; i < 6; i++)
                        {
                            FaceData faceData = new FaceData();

                            faceData.Facing = (Orientation)i;

                            faceData.X = (byte)x;
                            faceData.Y = (byte)y;
                            faceData.Z = (byte)z;

                            //list.Add(faceData);
                        }
                    }
                }
            }

            return list;
        }
    }
}