#include <basalt/char_types.hpp>

#if defined(BASALT_OS_WINDOWS)
#include <Windows.h>
#else
#include <dlfcn.h>
#endif

namespace basalt::presenter::dll_loader {

    enum class DllKind {
        Engine,       ///< Render engine
        Deliver,      ///< Data deliver
        ObjectLoader, ///< 3D object loader
        AnimeLoader,  ///< Camera animation loader
    };

    class DllLoader {
    public:
#if defined(BASALT_OS_WINDOWS)
        using Handle = HMODULE;
#else
        using Handle = void*;
#endif

    public:
        DllLoader(DllKind kind, const shared::char_types::BSStringView& filename);
        ~DllLoader();

    private:
        void* GetFunctionPointer(const char* name);

    public:
        template<typename T>
        T* CreateInstance() {
            using Fct = T* (*) ();
            constexpr char EXPOSE_FUNC_NAME[] = "BSCreateInstance";
            auto fct = (Fct) GetFunctionPointer(EXPOSE_FUNC_NAME);
            return fct();
        }
        template<typename T>
        void DestroyInstance(T* instance) {
            using Fct = void (*)(T*);
            constexpr char EXPOSE_FUNC_NAME[] = "BSDestroyInstance";
            auto fct = (Fct) GetFunctionPointer(EXPOSE_FUNC_NAME);
            fct(instance);
        }

    private:
        Handle m_Handle;
    };

} // namespace basalt::presenter::dll_loader