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

#pragma once
#include "entitydir.h"
#include "entityanim.h"
#include "rpg/entity/player.h"
#include "npc.h"
#include "rpg/world/worldpos.h"

#define ENTITY_COUNT 256

typedef struct map_s map_t;

typedef enum {
  ENTITY_TYPE_NULL,
  ENTITY_TYPE_PLAYER,
  ENTITY_TYPE_NPC,
  ENTITY_TYPE_COUNT
} entitytype_t;

typedef struct entity_s {
  uint8_t id;
  entitytype_t type;

  // Movement
  entitydir_t direction;
  worldpos_t position;

  entityanim_t animation;
  uint8_t animFrame;
  
  union {
    player_t player;
    npc_t npc;
  };
} entity_t;

extern entity_t ENTITIES[ENTITY_COUNT];

/**
 * Initializes an entity structure.
 * 
 * @param entity Pointer to the entity structure to initialize.
 * @param type The type of the entity.
 */
void entityInit(entity_t *entity, const entitytype_t type);

/**
 * Updates an entity.
 * 
 * @param entity Pointer to the entity structure to update.
 */
void entityUpdate(entity_t *entity);

/**
 * Turn an entity to face a new direction.
 * 
 * @param entity Pointer to the entity to turn.
 * @param direction The direction to face.
 */
void entityTurn(entity_t *entity, const entitydir_t direction);

/**
 * Make an entity walk in a direction.
 * 
 * @param entity Pointer to the entity to make walk.
 * @param direction The direction to walk in.
 */
void entityWalk(entity_t *entity, const entitydir_t direction);

/**
 * Gets the entity at a specific world position.
 * 
 * @param map Pointer to the map to check.
 * @param pos The world position to check.
 * @return Pointer to the entity at the position, or NULL if none.
 */
entity_t *entityGetAt(const worldpos_t pos);