#include <iostream>

#include "WasmOcctView.h"

#include <Message.hxx>
#include <Message_Messenger.hxx>
#include <Message_PrinterSystemLog.hxx>
#include <OSD_MemInfo.hxx>
#include <OSD_Parallel.hxx>

#include <emscripten.h>
#include <emscripten/html5.h>

//! Dummy main loop callback for a single shot.
extern "C" void onMainLoop()
{
  // do nothing here - viewer updates are handled on demand
  emscripten_cancel_main_loop();
}

EMSCRIPTEN_KEEPALIVE int main()
{
  Message::DefaultMessenger()->Printers().First()->SetTraceLevel (Message_Trace);
  Handle(Message_PrinterSystemLog) aJSConsolePrinter = new Message_PrinterSystemLog ("webgl-sample", Message_Trace);
  Message::DefaultMessenger()->AddPrinter (aJSConsolePrinter); // open JavaScript console within the Browser to see this output
  Message::DefaultMessenger()->Send (TCollection_AsciiString("NbLogicalProcessors: ") + OSD_Parallel::NbLogicalProcessors(), Message_Trace);

  // setup a dummy single-shot main loop callback just to shut up a useless Emscripten error message on calling eglSwapInterval()
  emscripten_set_main_loop (onMainLoop, -1, 0);

  WasmOcctView& aViewer = WasmOcctView::Instance();
  aViewer.run();
  Message::DefaultMessenger()->Send (OSD_MemInfo::PrintInfo(), Message_Trace);
  return 0;
}