#ifdef GTP_INTERNAL
#define USE_QT 1
#else
#define USE_QT 0
#endif

#define USE_THREADS 1

#ifdef UNICODE
#undef UNICODE
#endif

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

#include "PreprocessorFactory.h"
#include "Parser.h"
#include "Environment.h"
#include "MeshKdTree.h"
#include "Preprocessor.h"
#include "common.h"

#include "PreprocessorThread.h"

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

#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();
}


static 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;
}


static int SplitFilenames(const string str, vector<string> &filenames)
{
	int pos = 0;

	while(1) {
		int npos = (int)str.find(';', pos);
		
		if (npos < 0 || npos - pos < 1)
			break;
		filenames.push_back(string(str, pos, npos - pos));
		pos = npos + 1;
	}
	
	filenames.push_back(string(str, pos, str.size() - pos));
	return (int)filenames.size();
}


static string GetInternKdTreeName(const string &filename)
{
	vector<string> filenames;
	const int files = SplitFilenames(filename, filenames);

	vector<string>::const_iterator sit, sit_end = filenames.end();
	string kdFilename;

	int i = 0;
	for (sit = filenames.begin(); sit != sit_end; ++ sit, ++ i)
	{
		string currentFile = *sit;
		//cout << "here6 " << currentFile << endl;
		string strippedFilename;

		if (i == 0)
		{	
			strippedFilename = currentFile;
		}
		else
		{
			strippedFilename = string(StripPath(currentFile.c_str()));
		}
		
		string suffix("_");

		if (i == (int)filenames.size() - 1)
		{
			if (preprocessor->mLoadMeshes)
			{
				suffix = ".kdm";	
			}
			else
			{
				suffix = ".kdt";
			}
		}

		if (strstr(strippedFilename.c_str(), ".x3d")) 
		{
			kdFilename += ReplaceSuffix(strippedFilename, ".x3d", suffix);
		}
        else if (strstr(strippedFilename.c_str(), ".dat"))
		{
			kdFilename += ReplaceSuffix(strippedFilename, ".dat", suffix);
		} 
		else if (strstr(strippedFilename.c_str(), ".obj"))
		{
			kdFilename += ReplaceSuffix(strippedFilename, ".dat", suffix);
		}
		else
		{
			cerr << "Error: Currently unsupported format for kd, filename " << currentFile << endl;
		}
	}

	//cout << "kdfilename: " << kdFilename << endl;
	return kdFilename;
}


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 (!(preprocessor = PreprocessorFactory::CreatePreprocessor(preprocessorType)))
	{
		Environment::DelSingleton();
		cerr << "Unknown preprocessor type" << endl;
		exit(1);
	}


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

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

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

	const string externKdTree = ReplaceSuffix(filename, ".obj", ".kdf");
	const string internKdTree = GetInternKdTreeName(filename);

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

	// parse view cells related options
	if (!preprocessor->PrepareViewCells())
	{
		Cleanup();
		exit(1);
	}

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

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

#if USE_QT
	pt = new QtPreprocessorThread(preprocessor);
#else
#if USE_THREADS
	pt = new BoostPreprocessorThread(preprocessor);
#else
	pt = new PreprocessorThread(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_QT		
#if USE_THREADS
		pt->InitThread();
		if (!preprocessor->mDelayVisibilityComputation)
		  pt->RunThread();
#endif
		
		// 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);

		  ((QtGlRendererWidget *)rendererWidget)->SetThread((QtPreprocessorThread *)pt);
		  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
	  pt->Main();
	}
	
	// release memory
	Cleanup();
	
	return returnCode;
}