System.hpp

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//
// Created by Zoe Roux on 2021-05-14.
//
 
#pragma once
 
#include <chrono>
#include <vector>
#include <typeinfo>
#include <typeindex>
#include "Entity/Entity.hpp"
#include "Wal.hpp"
#include "View/View.hpp"
#include "ISystem.hpp"
#include <iostream>
 
namespace WAL
{
    template<typename ...Dependencies>
    class System : public ISystem
    {
    public:
        ~System() override = default;
        System(System &&) noexcept = default;
 
        View<Dependencies...> &getView() override
        {
            return this->_wal.getScene()->template view<Dependencies...>();
        }
 
        virtual void onUpdate(ViewEntity<Dependencies...> &entity, std::chrono::nanoseconds dtime) {}
 
        virtual void onFixedUpdate(ViewEntity<Dependencies...> &entity) {}
 
        virtual void onSelfUpdate(std::chrono::nanoseconds dtime) {}
 
 
        void update(std::chrono::nanoseconds dtime) final
        {
            for (auto &entity : this->getView())
                this->onUpdate(entity, dtime);
            this->onSelfUpdate(dtime);
        }
 
        void fixedUpdate() final
        {
            for (auto &entity : this->getView())
                this->onFixedUpdate(entity);
        }
    protected:
        Wal &_wal;
 
        explicit System(Wal &wal)
            : _wal(wal)
        {}
        System(const System &) = default;
        System &operator=(const System &) = default;
    };
} // namespace WAL