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

#pragma once
#include "direction.h"
#include "rpg/entity/player.h"
#include "npc.h"
#include "physics/physics.h"

#define ENTITY_FRICTION 0.9f
#define ENTITY_MIN_VELOCITY 0.05f

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 {
  map_t *map;
  entitytype_t type;
  direction_t direction;

  vec2 position;
  vec2 velocity;

  union {
    player_t player;
    npc_t npc;
  };
} entity_t;

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

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