using System.Runtime.InteropServices;
using DatReaderWriter.Enums;
using Chorizite.Core.Render;

namespace AcDream.App.Rendering.Wb {
    /// <summary>
    /// Per-batch (draw call) data for modern rendering.
    /// Consists of a texture-table slot (Campaign V slice V2; was a raw 64-bit
    /// bindless handle) and the layer index within the shared/pooled array.
    /// Indexed by gl_DrawIDARB in the vertex shader. Same 16-byte std430 shape
    /// as mesh_modern.vert's BatchData: TextureTableIndex/Reserved/TextureIndex/
    /// Flags at offsets 0/4/8/12 — see ModernBatchDataLayoutTests.
    /// </summary>
    [StructLayout(LayoutKind.Sequential, Pack = 4)]
    internal struct ModernBatchData {
        public uint TextureTableIndex; // 4 bytes — slot into the binding=9 handle table
        public uint Reserved;          // 4 bytes — pad, keeps TextureIndex/Flags at offsets 8/12
        public uint TextureIndex;      // 4 bytes — layer within the texture array
        public uint Flags;             // 4 bytes — reserved, matches mesh_modern.vert's BatchData.flags
    }

    internal struct LandblockMdiCommand {
        public ulong SortKey;
        public ulong ObjectId;
        public DrawElementsIndirectCommand Command;
        public ModernBatchData BatchData;
        public uint TextureIndex;
        public ManagedGLTextureArray Atlas;
        public uint VAO;
        public uint IBO;
        public bool IsTransparent;
        public bool IsAdditive;
        public bool HasWrappingUVs;
    }
}