#include "engine_instance.h"

#include <QDebug>

#include <QOpenGLFunctions>

#include <QSurface>

static QOpenGLContext* currentOpenglContext = nullptr;

extern "C" void (*getProcAddress(const char* fn))() {

  if (!currentOpenglContext)

    return nullptr;

  else

    return currentOpenglContext->getProcAddress(fn);

}

EngineInstance::EngineInstance(QObject* parent)

    : QObject(parent), m_instance(Engine::start_engine()) {}

EngineInstance::~EngineInstance() { Engine::cleanup(m_instance); }

void EngineInstance::sendConfig(const GameConfig& config) {

  for (auto b : config.config()) {

    Engine::send_ipc(m_instance, reinterpret_cast<uint8_t*>(b.data()),

                     static_cast<size_t>(b.size()));

  }

}

void EngineInstance::advance(quint32 ticks) {

  Engine::advance_simulation(m_instance, ticks);

}

void EngineInstance::renderFrame() { Engine::render_frame(m_instance); }

void EngineInstance::setOpenGLContext(QOpenGLContext* context) {

  currentOpenglContext = context;

  auto size = context->surface()->size();

  Engine::setup_current_gl_context(

      m_instance, static_cast<quint16>(size.width()),

      static_cast<quint16>(size.height()), &getProcAddress);

}

Engine::PreviewInfo EngineInstance::generatePreview() {

  Engine::PreviewInfo pinfo;

  Engine::generate_preview(m_instance, &pinfo);

  return pinfo;

}