#include <voxula/internals/ecs/lookup.h>
#include <voxula/internals/ecs/head.h>
#include <stdlib.h>

vecs_entity_map_s vecs_create_lookup_map()
{
    vecs_entity_map_s map;
    map.num_entries = 0;
    map.entries_capacity = 8192;
    map.entries = malloc(map.entries_capacity * sizeof(vx_uuid_entry_s));
    return map;
}

void vecs_delete_lookup_map(vecs_entity_map_s *map)
{
    free(map->entries);
}

void * vecs_lookup_entity(vecs_entity_map_s *map, vx_uuid_d uuid)
{
    uint32_t entry_index = 0;
    while(entry_index < map->num_entries)
    {
        vecs_shadow_s *shadow = map->entries[entry_index].shadow;
        if(shadow->identifier == uuid)
        {
            return shadow;
        }
        ++entry_index;
    }
    return NULL;
}

void vecs_register_entity(vecs_entity_map_s *map, void *shadow_ptr)
{
    vecs_entity_entry_s *entry = &map->entries[map->num_entries];
    entry->shadow = shadow_ptr;
    ++map->num_entries;
}

void vecs_unregister_entity(vecs_entity_map_s *map, void *shadow_ptr)
{
    vecs_shadow_s *shadow = shadow_ptr;
    uint32_t entry_index = 0;
    while(entry_index < map->num_entries)
    {
        vecs_shadow_s *entry = map->entries[entry_index].shadow;
        if(entry->identifier == shadow->identifier)
        {
            map->entries[entry_index] = map->entries[map->num_entries - 1];
            break;
        }
        ++entry_index;
    }
}