/**
 * Copyright (c) 2025 Dominic Masters
 * 
 * This software is released under the MIT License.
 * https://opensource.org/licenses/MIT
 */

#pragma once
#include "dusk.h"
#include "duskdefs.h"

#define CHUNK_TILE_COUNT (CHUNK_WIDTH * CHUNK_HEIGHT * CHUNK_DEPTH)

#define MAP_CHUNK_WIDTH 3
#define MAP_CHUNK_HEIGHT 3
#define MAP_CHUNK_DEPTH 3
#define MAP_CHUNK_COUNT (MAP_CHUNK_WIDTH * MAP_CHUNK_HEIGHT * MAP_CHUNK_DEPTH)

typedef int16_t worldunit_t;
typedef int16_t chunkunit_t;
typedef int16_t chunkindex_t;
typedef uint32_t chunktileindex_t;

typedef int32_t worldunits_t;
typedef int32_t chunkunits_t;

typedef struct worldpos_s {
  worldunit_t x, y, z;
} worldpos_t;

typedef struct chunkpos_t {
  chunkunit_t x, y, z;
} chunkpos_t;

/**
 * Compares two world positions for equality.
 * 
 * @param a The first world position.
 * @param b The second world position.
 * @return true if equal, false otherwise.
 */
bool_t worldPosIsEqual(const worldpos_t a, const worldpos_t b);

/**
 * Converts a world position to a chunk position.
 * 
 * @param worldPos The world position.
 * @param out The output chunk position.
 */
void chunkPosToWorldPos(const chunkpos_t* chunkPos, worldpos_t* out);

/**
 * Converts a chunk position to a world position.
 * 
 * @param worldPos The world position.
 * @param out The output chunk position.
 */
void worldPosToChunkPos(const worldpos_t* worldPos, chunkpos_t* out);

/**
 * Converts a position in world-space to an index inside a chunk that the tile
 * resides in.
 * 
 * @param worldPos The world position.
 * @return The tile index within the chunk.
 */
chunktileindex_t worldPosToChunkTileIndex(const worldpos_t* worldPos);

/**
 * Converts a chunk position to a world position.
 * 
 * @param worldPos The world position.
 * @param out The output chunk position.
 */
chunkindex_t chunkPosToIndex(const chunkpos_t* pos);