#pragma once

#include "typedefs.hpp"

#include <limits>
#include <string>

inline constexpr int ENGINE_VERSION_MAJOR = 0;
inline constexpr int ENGINE_VERSION_MINOR = 31;

#ifdef NDEBUG
inline constexpr bool ENGINE_DEBUG_BUILD = false;
#else
inline constexpr bool ENGINE_DEBUG_BUILD = true;
#endif // NDEBUG

inline const std::string ENGINE_VERSION_STRING = "0.31";

/// @brief world regions format version
inline constexpr uint REGION_FORMAT_VERSION = 3;

/// @brief max simultaneously open world region files
inline constexpr uint MAX_OPEN_REGION_FILES = 32;

inline constexpr blockid_t BLOCK_AIR = 0;
inline constexpr blockid_t BLOCK_OBSTACLE = 1;
inline constexpr blockid_t BLOCK_STRUCT_AIR = 2;
inline constexpr itemid_t ITEM_EMPTY = 0;
inline constexpr entityid_t ENTITY_NONE = 0;
inline constexpr entityid_t ENTITY_AUTO = std::numeric_limits<entityid_t>::max();

inline constexpr int CHUNK_W = 16;
inline constexpr int CHUNK_H = 256;
inline constexpr int CHUNK_D = 16;

inline constexpr uint VOXEL_USER_BITS = 8;
inline constexpr uint VOXEL_USER_BITS_OFFSET = sizeof(blockstate_t)*8-VOXEL_USER_BITS;

/// @brief % unordered map max average buckets load factor.
/// Low value gives significant performance impact by minimizing collisions and
/// lookup latency. Default value (1.0) shows x2 slower work.
inline constexpr float CHUNKS_MAP_MAX_LOAD_FACTOR = 0.1f;

/// @brief chunk volume (count of voxels per Chunk)
inline constexpr int CHUNK_VOL = (CHUNK_W * CHUNK_H * CHUNK_D);

/// @brief block id used to mark non-existing voxel (voxel of missing chunk)
inline constexpr blockid_t BLOCK_VOID = std::numeric_limits<blockid_t>::max();
/// @brief item id used to mark non-existing item (error)
inline constexpr itemid_t ITEM_VOID = std::numeric_limits<itemid_t>::max();
/// @brief max number of block definitions possible
inline constexpr blockid_t MAX_BLOCKS = BLOCK_VOID;

/// @brief calculates a 1D array index from 3D array indices
inline constexpr uint vox_index(uint x, uint y, uint z, uint w=CHUNK_W, uint d=CHUNK_D) {
    return (y * d + z) * w + x;
}

/// @brief pixel size of an item inventory icon
inline constexpr int ITEM_ICON_SIZE = 48;

inline constexpr int TRANSLUCENT_BLOCKS_SORT_INTERVAL = 8;

inline constexpr int ATLAS_EXTRUSION = 2;

inline const std::string SHADERS_FOLDER = "shaders";
inline const std::string TEXTURES_FOLDER = "textures";
inline const std::string FONTS_FOLDER = "fonts";
inline const std::string LAYOUTS_FOLDER = "layouts";
inline const std::string SOUNDS_FOLDER = "sounds";
inline const std::string MODELS_FOLDER = "models";
inline const std::string SKELETONS_FOLDER = "skeletons";
inline const std::string POST_EFFECTS_FOLDER = "shaders/effects";

inline const std::string FONT_DEFAULT = "normal";