#ifdef GTP_INTERNAL
//#define USE_QT 0
#endif
//#define USE_QT 0
#define USE_THREADS 1

#ifdef UNICODE
#undef UNICODE
#endif

#include <windows.h>
#include <stdio.h>
#include <crtdbg.h>

#include "SamplingPreprocessor.h"
#include "VssPreprocessor.h"
#include "RssPreprocessor.h"
#include "ExactPreprocessor.h"
#include "Parser.h"
#include "UnigraphicsParser.h"
#include "X3dParser.h"
#include "Environment.h"
#include "Camera.h"
#include "MeshKdTree.h"
#include "Exporter.h"
#include "ViewCell.h"
#include "SceneGraph.h"

#if USE_THREADS && !USE_QT
#include "BoostPreprocessorThread.h"
#endif

#include "RenderSampler.h"
#include "ResourceManager.h"
#include "GlRenderer.h"

#if USE_QT
#include "QtPreprocessorThread.h"
#include "QtGlRenderer.h"
#endif

#define USE_EXE_PATH false


using namespace GtpVisibilityPreprocessor;

Preprocessor *preprocessor = NULL;
GlRendererWidget *rendererWidget = NULL;

// DLL function signature
typedef GlRendererWidget *(*importFunction)(Preprocessor *);




void Cleanup()
{
	DEL_PTR(rendererWidget);
	DEL_PTR(preprocessor);

	Environment::DelSingleton();
	MeshManager::DelSingleton();
	MaterialManager::DelSingleton();
}




string ReplaceSuffix(string filename,
					 string a,
					 string b)
{
  string result = filename;

  int pos = (int)filename.rfind(a, (int)filename.size() - 1);
  if (pos == filename.size() - a.size()) {
	result.replace(pos, a.size(), b);
  }
  return result;
}

int
main(int argc, char **argv)
{

	//Now just call this function at the start of your program and if you're
	//compiling in debug mode (F5), any leaks will be displayed in the Output
	//window when the program shuts down. If you're not in debug mode this will
	//be ignored. Use it as you will!
	//note: from GDNet Direct [3.8.04 - 3.14.04] void detectMemoryLeaks() {
#if 0
  _CrtSetDbgFlag(_CRTDBG_LEAK_CHECK_DF|_CRTDBG_ALLOC_MEM_DF);
  _CrtSetReportMode(_CRT_ASSERT,_CRTDBG_MODE_FILE);
  _CrtSetReportFile(_CRT_ASSERT,_CRTDBG_FILE_STDERR); 
#endif

	int returnCode = 0;
	
	InitTiming();

	Debug.open("debug.log");
  
	Environment::GetSingleton()->Parse(argc, argv, USE_EXE_PATH);
	MeshKdTree::ParseEnvironment();

	
	char buff[128];
	Environment::GetSingleton()->GetStringValue("Preprocessor.type", buff);
	string preprocessorType(buff);

	if (preprocessorType == "vss")
	{
		preprocessor = new VssPreprocessor();
	}
	else
	{
		if (preprocessorType == "rss")
		{
			preprocessor = new RssPreprocessor();
		}
		else
		{
			if (preprocessorType == "exact")
			{
				preprocessor = new ExactPreprocessor();
			}
			else
			{
				if (preprocessorType == "sampling")
				{
					preprocessor = new SamplingPreprocessor();
				}
				else
				{	
					if (preprocessorType == "render")
					{
						preprocessor = new RenderSampler();
					}
					else 
					{
						Environment::DelSingleton();
						cerr<<"Unknown preprocessor type"<<endl;
						Debug<<"Unknown preprocessor type"<<endl;
						exit(1);
					}
				}
			}
		}
	}


	/////////////
	//-- load scene 

	Environment::GetSingleton()->GetStringValue("Scene.filename", buff);
	string filename(buff);

	if (!preprocessor->LoadScene(filename))
	{
		cout << "loading file " << filename << " failed" << endl;
		Cleanup();
		exit(1);
	}


	string externKdTree = ReplaceSuffix(filename, ".obj", ".kdf");
	char internKdTree[100];
	Environment::GetSingleton()->GetStringValue("Preprocessor.kdTreeFilename", internKdTree);

	//-- initialize external ray casters
	if (preprocessor->InitRayCast(externKdTree, internKdTree))
	{
		cout << "ray casting initialized!" << endl;
	}
	else
	{
		cout << "ray casting initialization failed" << endl;
		Cleanup();
		exit(1);
	}

	// export kd tree?
	bool exportKdTree;
	Environment::GetSingleton()->GetBoolValue("Preprocessor.exportKdTree", exportKdTree);
	if (exportKdTree)
	{
		const long startTime = GetTime();
		cout << "exporting kd tree ... ";

		if (!preprocessor->ExportKdTree(internKdTree))
		{
			cout << " error exporting kd tree with filename " << internKdTree << endl;
		}
		else
		{
			cout << "finished in " << TimeDiff(startTime, GetTime()) * 1e-3 << " secs" << endl;
		}
	}

	// parse view cells related options
	preprocessor->PrepareViewCells();

	if (0) 
	{
		preprocessor->Export(filename + "-out.x3d", true, false, false);
		preprocessor->Export(filename + "-kdtree.x3d", false, true, false);	
	}

	// create a preprocessor thread (note: capsulates calls to boost fuctions!)
	//PreprocessorThread *pt = PreprocessorThreadFactory::Create(preprocessor);
#if USE_THREADS
	PreprocessorThread *pt;

#if USE_QT
	pt = new QtPreprocessorThread(preprocessor);
#else
	pt = new BoostPreprocessorThread(preprocessor);
#endif
#endif

	bool guiSupported = false;

	if (preprocessor->mUseGlRenderer || preprocessor->mUseGlDebugger)
	  {
		cout << "using gl widget" << endl;
		// create and run the preprocessor application in a parallel thread
#if USE_THREADS
		pt->InitThread();
		pt->RunThread();
#endif
		
#if USE_QT		
		// display the render widget
		if (!rendererWidget) 
		{
		  // create a qt application first (must be created before any opengl widget ...)
		  QApplication *app = new QApplication(argc, NULL);
		  
		  if (!QGLFormat::hasOpenGL() || !QGLPixelBuffer::hasOpenGLPbuffers()) {
			QMessageBox::information(0, "OpenGL pbuffers", 
									 "This system does not support OpenGL/pbuffers.",
									 QMessageBox::Ok);
			return NULL;
		  }
		  
		  
		  rendererWidget = new QtGlRendererWidget(preprocessor->mSceneGraph,
												  preprocessor->mViewCellsManager,
												  preprocessor->mKdTree);

		  rendererWidget->Show();
		  guiSupported = true; 
		}

		qApp->exec();	
#endif
	  }
	
	if (!guiSupported) {
	  preprocessor->mUseGlRenderer = false;
	  preprocessor->mUseGlDebugger = false;
	}
	
	if (!(preprocessor->mUseGlRenderer || preprocessor->mUseGlDebugger)) {
	  // just call the mail method -> will be executed in the main thread
#if USE_THREADS
	  pt->Main();
#endif
	}
	
	// release memory
	Cleanup();
	
	return returnCode;
}