engine.hpp

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#pragma once
 
#include <memory>
#include <optional>
#include <engine/window.hpp>
#include <engine/renderer.hpp>
#include <systems/input_system.hpp>
#include <systems/physics_system.hpp>
#include "scene/entity.hpp"
 
namespace solarsim {
    struct Registry;

    class Engine {
        public:
            Engine(const Engine&) = delete;
            Engine& operator=(const Engine&) = delete;

            static Engine& get() {
                static Engine instance;
                return instance;
            }

            void run();
 
            // System accessors

            const Window& window() const { return m_window; }
            Window& window() { return m_window; }
            const Renderer& renderer() const { return m_renderer; }
            Renderer& renderer() { return m_renderer; }

            const InputSystem& inputManager() const { return m_inputSystem; }
            InputSystem& inputManager() { return m_inputSystem; }
            const PhysicsSystem& physicsSystem() const { return m_physicsSystem; }
            PhysicsSystem& physicsSystem() { return m_physicsSystem; }

            static std::optional<Entity> getPrimaryCamera(Registry& registry);
        private:
            Engine();
            ~Engine();

            void init();

            Window m_window;
            Renderer m_renderer;

            InputSystem m_inputSystem;
            PhysicsSystem m_physicsSystem;
    };
}