// This file is part of the 64k demo project.
// Core asset management interface for basic asset retrieval.
// For typed helpers (TextureAsset, MeshAsset), include asset_manager_utils.h

#pragma once
#include "asset_manager_dcl.h"

enum class AssetType : uint8_t {
  WGSL,
  SPEC,
  TEXTURE,
  MESH,
  BINARY,
  MP3,
  PROC,
  PROC_GPU,
};

// Compression scheme applied to the packed bytes (only relevant for static
// embedded assets; disk-load and procedural assets are always NONE).
enum class AssetCompression : uint8_t {
  NONE = 0,
  // Order-0 rANS, model seeded from a corpus-wide histogram embedded in the
  // generated assets blob (see GetAnsAsciiHistogram). Used for WGSL.
  ANS_ASCII = 1,
};

struct AssetRecord {
  const uint8_t* data; // Pointer to asset data (static or dynamic)
  size_t size;         // Size of 'data' in bytes (compressed size if any)
  AssetType type;
  AssetCompression compression;   // How 'data' is encoded; NONE = raw bytes
  size_t uncompressed_size;       // Size after decompression (== size if NONE)
  const char* proc_func_name_str; // Name of procedural generation function
                                  // (string literal)
  const float* proc_params; // Parameters for procedural generation (static,
                            // from assets.txt)
  int num_proc_params;      // Number of procedural parameters
};

// Initial-state histogram (256 entries) used to seed ANS_ASCII compression.
// Defined in the generated assets blob; computed at pack time over the WGSL
// corpus.
const uint32_t* GetAnsAsciiHistogram();

// Generic interface
// Retrieves a pointer to the asset data.
// - Static assets are guaranteed to be 16-byte aligned.
// - Static assets are guaranteed to be null-terminated (safe as C-strings).
// - 'out_size' returns the original asset size (excluding the null terminator).
const uint8_t* GetAsset(AssetId asset_id, size_t* out_size = nullptr);
void DropAsset(AssetId asset_id, const uint8_t* asset);

// Returns the AssetId for a given asset name, or AssetId::ASSET_LAST_ID if not
// found.
AssetId GetAssetIdByName(const char* name);

// Returns the AssetType for a given asset id.
AssetType GetAssetType(AssetId asset_id);

#if !defined(STRIP_ALL)
// Hot-reload: Parse and reload assets from config file (debug only)
bool ReloadAssetsFromFile(const char* config_path);
#endif