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

#define USE_EXE_PATH false


using namespace GtpVisibilityPreprocessor;

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

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


int LoadMyDll()
{
	importFunction LoadRenderWidget;

	// Load DLL file
	HINSTANCE hinstLib = LoadLibrary("../QtGlRenderer/Release/QtGlRenderer.dll");

	if (hinstLib == NULL) 
	{
		cout << "ERROR: unable to load DLL\n";
		return 1;
	}
  
	// Get function pointer
	LoadRenderWidget = (importFunction)GetProcAddress(hinstLib, "LoadRenderWidget");
  
	if (LoadRenderWidget == NULL) 
	{
		cout << "ERROR: unable to find DLL function\n";
		return 1;
	}

	cout << "loading widget ... ";
	// load the render window
	rendererWidget = LoadRenderWidget(preprocessor);
	cout << "finished" << endl;
	// Unload DLL file
	//FreeLibrary(hinstLib);
  
	return 0;
}


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

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


void DisplayWidget()
{
	if (!rendererWidget)
	{
		LoadMyDll();
	}
	
  //rendererWidget->Show();
}


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() {
	_CrtSetDbgFlag(_CRTDBG_LEAK_CHECK_DF|_CRTDBG_ALLOC_MEM_DF);
	_CrtSetReportMode(_CRT_ASSERT,_CRTDBG_MODE_FILE);
	_CrtSetReportFile(_CRT_ASSERT,_CRTDBG_FILE_STDERR); 

	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);
	preprocessor->LoadScene(filename);

	//-- initialize external ray casters
	if (preprocessor->InitRayCast("../data/grandcanyon1_RotXmin90.kdf"))
	{
		cout << "ray casting initialized!" << endl;
	}
	else
	{
		cout << "ray casting initialization failed" << endl;
		exit(1);
	}

	//-- build kd tree from scene geometry
	preprocessor->BuildKdTree();
	preprocessor->KdTreeStatistics(cout);
	
	/*preprocessor->mKdTree->ExportBinTree("kd.bin.gz");
	MeshManager::GetSingleton()->ExportEntries("meshes.bin");

	KdTree *kdTree2 = new KdTree;

	cout << "loading kd tree ... ";
	long startTime = GetTime();
	kdTree2->LoadBinTree("kd.bin.gz", preprocessor->mObjects);
  		
	cout << "finished in " << TimeDiff(startTime, GetTime()) * 1e-3 << " secs" << endl;

	Exporter *exporter = Exporter::GetExporter("testkd.x3d");
	MeshManager::GetSingleton()->ExportEntries("meshes.bin");

	if (exporter) 
	{
		exporter->SetWireframe();
		exporter->ExportKdTree(*kdTree2, true);

		delete exporter;
	}

	DEL_PTR(kdTree2);
*/
	// 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);
	BoostPreprocessorThread pt(preprocessor);

	bool guiSupported = false;
	if (preprocessor->mUseGlRenderer || preprocessor->mUseGlDebugger)
	  {
		cout << "using gl widget" << endl;
		// create and run the preprocessor application in a parallel thread
		pt.InitThread();
		//pt.RunThread();
		
		// display the render widget
		if (!rendererWidget)
		  guiSupported = LoadMyDll();
	  }
	
	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();
	}
	
	Cleanup();
	
	return returnCode;
}