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

#pragma once
#include "rpg/overworld/chunk.h"

#define MAP_FILE_PATH_MAX 128

typedef struct map_s {
  char_t filePath[MAP_FILE_PATH_MAX];
  char_t dirPath[MAP_FILE_PATH_MAX];
  char_t fileName[MAP_FILE_PATH_MAX];

  chunk_t chunks[MAP_CHUNK_COUNT];
  chunk_t *chunkOrder[MAP_CHUNK_COUNT];
  chunkpos_t chunkPosition;
} map_t;

extern map_t MAP;

/**
 * Initializes the map.
 * 
 * @return An error code.
 */
errorret_t mapInit();

/**
 * Checks if a map is loaded.
 * 
 * @return true if a map is loaded, false otherwise.
 */
bool_t mapIsLoaded();

/**
 * Loads a map from the given file path.
 * 
 * @param path The file path.
 * @param position The initial chunk position.
 * @return An error code.
 */
errorret_t mapLoad(
  const char_t *path,
  const chunkpos_t position
);

/**
 * Updates the map.
 */
void mapUpdate();

/**
 * Disposes of the map.
 */
void mapDispose();

/**
 * Sets the map position and updates chunks accordingly.
 * 
 * @param newPos The new chunk position.
 * @return An error code.
 */
errorret_t mapPositionSet(const chunkpos_t newPos);

/**
 * Unloads a chunk.
 * 
 * @param chunk The chunk to unload.
 */
void mapChunkUnload(chunk_t* chunk);

/**
 * Loads a chunk.
 * 
 * @param chunk The chunk to load.
 * @return An error code.
 */
errorret_t mapChunkLoad(chunk_t* chunk);

/**
 * Gets the index of a chunk, within the world, at the given position.
 *
 * @param position The chunk position.
 * @return The index of the chunk, or -1 if out of bounds.
 */
chunkindex_t mapGetChunkIndexAt(const chunkpos_t position);

/**
 * Gets a chunk by its index.
 * 
 * @param chunkIndex The index of the chunk.
 * @return A pointer to the chunk.
 */
chunk_t * mapGetChunk(const uint8_t chunkIndex);

/**
 * Gets the tile at the given world position.
 * 
 * @param position The world position.
 * @return The tile at that position, or TILE_NULL if the chunk is unloaded.
 */
tile_t mapGetTile(const worldpos_t position);