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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Copyright (c) 2008-2021 NVIDIA Corporation. All rights reserved.
// Copyright (c) 2004-2008 AGEIA Technologies, Inc. All rights reserved.
// Copyright (c) 2001-2004 NovodeX AG. All rights reserved.  

#include "foundation/PxAssert.h"
#include "RendererConfig.h"
#include "SampleCommandLine.h"
#include "RendererMemoryMacros.h"
#include "SampleAllocator.h"
#include "PhysXSampleApplication.h"
#include "PxTkFile.h"

using namespace SampleFramework;

#if defined(RENDERER_MACOSX)
// MACOSX non-deterministically crashed with one thread ran
// SampleRenderer::createGLView (renderer initialization)
// and the other SampleRenderer::emitEvents (processing ESC key event).
// Apparently connecting the glView to the window interfers with
// OSX event processing for some reason.
#define SEPARATE_EVENT_LOOP 0
#else
#define SEPARATE_EVENT_LOOP 1
#endif

static PhysXSampleApplication* gApp = NULL;
static SampleSetup gSettings;
static SampleCommandLine* gSampleCommandLine = NULL;

void mainInitialize()
{
	PX_ASSERT(gSampleCommandLine);
	const SampleCommandLine& cmdline = *gSampleCommandLine;
	initSampleAllocator();
	gApp = SAMPLE_NEW(PhysXSampleApplication)(cmdline);
	
	gApp->customizeSample(gSettings);

	if (gApp->isOpen())
		gApp->close();

	gApp->open(gSettings.mWidth, gSettings.mHeight, gSettings.mName, gSettings.mFullscreen);
#if SEPARATE_EVENT_LOOP
	gApp->start(Ps::Thread::getDefaultStackSize());
#else
	if(gApp->isOpen()) gApp->onOpen();
#endif
}

void mainTerminate()
{
	DELETESINGLE(gApp);
	DELETESINGLE(gSampleCommandLine);
	releaseSampleAllocator();
}

bool mainContinue()
{
	if (gApp->isOpen() && !gApp->isCloseRequested())
	{
		if(gApp->getInputMutex().trylock())
		{
			gApp->handleMouseVisualization();
			gApp->doInput();
			gApp->update();
#if !SEPARATE_EVENT_LOOP
			gApp->updateEngine();
#endif
			gApp->getInputMutex().unlock();
		}
		Ps::Thread::sleep(1);
		return true;
	}

#if SEPARATE_EVENT_LOOP
	gApp->signalQuit();
	gApp->waitForQuit();
#else
	if (gApp->isOpen() || gApp->isCloseRequested())
		gApp->close();
#endif
		
	return false;
}

void mainLoop()
{
	while(mainContinue());
}

#if defined(RENDERER_WINDOWS)

	int main()
	{
		gSampleCommandLine = new SampleCommandLine(GetCommandLineA());
		mainInitialize();
		mainLoop();
		mainTerminate();
		return 0;
	}

#elif defined(RENDERER_LINUX)

	int main(int argc, const char *const* argv)
	{
		char* commandString = NULL;
		PxU32 commandLen = 0;
		const char* specialCommand = "--noXterm";
		const char* xtermCommand = "xterm -e ";
		bool foundSpecial = false;
		
		for(PxU32 i = 0; i < (PxU32)argc; i++)
		{
			foundSpecial = foundSpecial || (::strncmp(argv[i], specialCommand, ::strlen(specialCommand)) == 0);
			commandLen += ::strlen(argv[i]);
		}
		
		// extend command line if not chosen differently
		// and start again with terminal as parent
		if(!foundSpecial)
		{
			// increase size by new commands, spaces between commands and string terminator
			commandLen += ::strlen(xtermCommand) + ::strlen(specialCommand) + argc + 3;
			commandString = (char*)::malloc(commandLen * sizeof(char));
			
			::strcpy(commandString, xtermCommand);
			for(PxU32 i = 0; i < (PxU32)argc; i++)
			{
				::strcat(commandString, argv[i]);
				::strcat(commandString, " ");
			}
			::strcat(commandString, specialCommand);

			int ret = ::system(commandString);
			::free(commandString);
			
			if(ret < 0)
				shdfnd::printFormatted("Failed to run %s! If xterm is missing, try running with this parameter: %s\n", argv[0], specialCommand);
		}
		else
		{
			gSampleCommandLine = new SampleCommandLine((unsigned int)(argc), argv);
			mainInitialize();
			mainLoop();
			mainTerminate();
		}

		return 0;
	}

#else

	int main(int argc, const char *const* argv)
	{
		gSampleCommandLine = new SampleCommandLine((unsigned int)argc, argv);
		mainInitialize();
		mainLoop();
		mainTerminate();
		return 0;
	}

#endif