#include "game/entities/entity_factory.hpp"

#include <utility>
#include <vector>

#include "game/entities/entity.hpp"  // tipus complet per a unique_ptr<Entity>

auto EntityFactory::instance() -> EntityFactory& {
    static EntityFactory k_factory_;
    return k_factory_;
}

void EntityFactory::registerCreator(const std::string& name, Creator creator) {
    creators_[name] = std::move(creator);
}

auto EntityFactory::create(const std::string& name, const fkyaml::node& yaml) const
    -> std::unique_ptr<Entity> {
    auto it = creators_.find(name);
    if (it == creators_.end()) { return nullptr; }
    return it->second(yaml);
}

auto EntityFactory::registeredNames() const -> std::vector<std::string> {
    std::vector<std::string> names;
    names.reserve(creators_.size());
    for (const auto& [name, _] : creators_) { names.push_back(name); }
    return names;
}