kariokaEngine/src/scripting/PythonEngine.cpp

#include "PythonEngine.h"
#include <pybind11/embed.h>
#include <filesystem>
#include <iostream>
#include "../Engine.h"
#include <SDL2/SDL_log.h>

namespace py = pybind11;

PythonEngine& PythonEngine::Get()
{
    static PythonEngine instance;
    return instance;
}

void PythonEngine::Init()
{
    if (initialized_)
    {
        SDL_Log("[Python] Already initialized");
        return;
    }
    
    py::initialize_interpreter();
    
    try
    {
        py::module_::import("sys").attr("path").attr("append")("assets/scripts");
        SDL_Log("[Python] scripts/ path added");
    }
    catch (const py::error_already_set& e)
    {
        SDL_Log("[Python] Error setting sys.path: %s", e.what());
    }
    
    // Release GIL immidiately so game loop can run freely
    PyEval_SaveThread();
    
    initialized_ = true;
    SDL_Log("[Python] Embedded interpreter ready (managed by scoped_interpreter)");
}

void PythonEngine::Shutdown()
{
    if (initialized_) { return; }
    
    PyEval_RestoreThread(PyGILState_GetThisThreadState());
    py::finalize_interpreter();
    initialized_ = false;
}

void PythonEngine::Exec(const std::string& code)
{
    py::gil_scoped_acquire gil;
    
    try
    {
        py::exec(code);
    }
    catch (const py::error_already_set& e)
    {
        SDL_Log("[Python] Error: %s", e.what());
    }
    catch (const std::exception& e)
    {
        SDL_Log("[Python] Error: %s", e.what());
    }
}