/**
 * @file llappviewerwin32.cpp
 * @brief The LLAppViewerWin32 class definitions
 *
 * $LicenseInfo:firstyear=2007&license=viewerlgpl$
 * Second Life Viewer Source Code
 * Copyright (C) 2010, Linden Research, Inc.
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation;
 * version 2.1 of the License only.
 * 
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 * 
 * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
 * $/LicenseInfo$
 */ 

#include "llviewerprecompiledheaders.h"

#ifdef INCLUDE_VLD
#define VLD_FORCE_ENABLE 1
#include "vld.h"
#endif
#include "llwin32headers.h"

#include "llwindowwin32.h" // *FIX: for setting gIconResource.

#include "llappviewerwin32.h"

#include "llgl.h"
#include "res/resource.h" // *FIX: for setting gIconResource.

#include <fcntl.h>		//_O_APPEND
#include <io.h>			//_open_osfhandle()
#include <WERAPI.H>		// for WerAddExcludedApplication()
#include <process.h>	// _spawnl()
#include <tchar.h>		// For TCHAR support

#include "llviewercontrol.h"
#include "lldxhardware.h"

#include "nvapi/nvapi.h"
#include "nvapi/NvApiDriverSettings.h"

#include <stdlib.h>

#include "llweb.h"

#include "llviewernetwork.h"
#include "llmd5.h"
#include "llfindlocale.h"

#include "llcommandlineparser.h"
#include "lltrans.h"

#ifndef LL_RELEASE_FOR_DOWNLOAD
#include "llwindebug.h"
#endif

#include "stringize.h"
#include "lldir.h"
#include "llerrorcontrol.h"

#include <fstream>
#include <exception>

// Bugsplat (http://bugsplat.com) crash reporting tool
#ifdef LL_BUGSPLAT
#include "BugSplat.h"

#if LL_USESYSTEMLIBS
#include "jsoncpp/reader.h" // JSON
#else
#include "json/reader.h" // JSON
#endif

#include "llagent.h"                // for agent location
#include "llviewerregion.h"
#include "llvoavatarself.h"         // for agent name
#pragma optimize( "", off )

namespace FS
{
    std::wstring LogfileIn;
    std::wstring LogfileOut;
    std::wstring DumpFile;
}

namespace
{
    // MiniDmpSender's constructor is defined to accept __wchar_t* instead of
    // plain wchar_t*. That said, wunder() returns std::basic_string<__wchar_t>,
    // NOT plain __wchar_t*, despite the apparent convenience. Calling
    // wunder(something).c_str() as an argument expression is fine: that
    // std::basic_string instance will survive until the function returns.
    // Calling c_str() on a std::basic_string local to wunder() would be
    // Undefined Behavior: we'd be left with a pointer into a destroyed
    // std::basic_string instance. But we can do that with a macro...
    #define WCSTR(string) wunder(string).c_str()

    // It would be nice if, when wchar_t is the same as __wchar_t, this whole
    // function would optimize away. However, we use it only for the arguments
    // to the BugSplat API -- a handful of calls.
    inline std::basic_string<__wchar_t> wunder(const std::wstring& str)
    {
        return { str.begin(), str.end() };
    }

    // when what we have in hand is a std::string, convert from UTF-8 using
    // specific wstringize() overload
    inline std::basic_string<__wchar_t> wunder(const std::string& str)
    {
        return wunder(wstringize(str));
    }

    // Irritatingly, MiniDmpSender::setCallback() is defined to accept a
    // classic-C function pointer instead of an arbitrary C++ callable. If it
    // did accept a modern callable, we could pass a lambda that binds our
    // MiniDmpSender pointer. As things stand, though, we must define an
    // actual function and store the pointer statically.
    static MiniDmpSender *sBugSplatSender = nullptr;

    bool bugsplatSendLog(UINT nCode, LPVOID lpVal1, LPVOID lpVal2)
    {
        if (nCode == MDSCB_EXCEPTIONCODE)
        {
            // <FS:ND> Save dump and log into unique crash dymp folder 
            __wchar_t aBuffer[1024] = {};
            sBugSplatSender->getMinidumpPath(aBuffer, _countof(aBuffer));
            std::wstring strPath{ (wchar_t*)aBuffer };
            ::CopyFileW(strPath.c_str(), FS::DumpFile.c_str(), FALSE);
            ::CopyFileW(FS::LogfileIn.c_str(), FS::LogfileOut.c_str(), FALSE);
            // </FS:ND>

            // second instance does not have own log files
            if (!LLAppViewer::instance()->isSecondInstance())
            {
                // <FS:ND> We don't send log files
                // sBugSplatSender->sendAdditionalFile(
                //     WCSTR(LLError::logFileName()));
                // </FS:ND>

                sBugSplatSender->sendAdditionalFile(
                    WCSTR(*LLAppViewer::instance()->getStaticDebugFile()));
                }

            // sBugSplatSender->sendAdditionalFile(
            //   WCSTR(gDirUtilp->getExpandedFilename(LL_PATH_USER_SETTINGS, "settings.xml")));
            if (gCrashSettings.getBOOL("CrashSubmitSettings"))
                sBugSplatSender->sendAdditionalFile(  WCSTR(gDirUtilp->getExpandedFilename(LL_PATH_USER_SETTINGS, "settings.xml")));

            // We don't have an email address for any user. Hijack this
            // metadata field for the platform identifier.
            // sBugSplatSender->setDefaultUserEmail(
            //    WCSTR(STRINGIZE(LLOSInfo::instance().getOSStringSimple() << " ("
            //                    << ADDRESS_SIZE << "-bit)")));

            // <FS:ND> Add which flavor of FS generated an error
            std::string flavor = "hvk";
#ifdef OPENSIM
            flavor = "oss";
#endif
            sBugSplatSender->setDefaultUserEmail( WCSTR(STRINGIZE(LLOSInfo::instance().getOSStringSimple() << " ("  << ADDRESS_SIZE << "-bit, flavor " << flavor <<")")));
            // </FS:ND>

            //<FS:ND/> Clear out username first, as we get some crashes that has the OS set as username, let's see if this fixes it. Use Crash.Linden as a usr can never have a "Linden"
			// name and on the other hand a Linden will not likely ever crash on Firestom.
            sBugSplatSender->setDefaultUserName( WCSTR("Crash.Linden") );

            if (gAgentAvatarp)
            {
                // <FS:ND> Only send avatar name if enabled via prefs
                if (gCrashSettings.getBOOL("CrashSubmitName"))
                // </FS:ND>
                {
                    // user name, when we have it
                    sBugSplatSender->setDefaultUserName(WCSTR(gAgentAvatarp->getFullname()));
                // <FS:ND> Only send avatar name if enabled via prefs
                }
                // </FS:ND>

                //<FS:Ansariel> Only include if sending settings file
                //sBugSplatSender->sendAdditionalFile(
                //    WCSTR(gDirUtilp->getExpandedFilename(LL_PATH_PER_SL_ACCOUNT, "settings_per_account.xml")));
                if (gCrashSettings.getBOOL("CrashSubmitSettings"))
                {
                    sBugSplatSender->sendAdditionalFile(
                        WCSTR(gDirUtilp->getExpandedFilename(LL_PATH_PER_SL_ACCOUNT, "settings_per_account.xml")));
                }
                // <FS:Ansariel>
            }

            // LL_ERRS message, when there is one
            sBugSplatSender->setDefaultUserDescription(WCSTR(LLError::getFatalMessage()));

            if (gAgent.getRegion())
            {
                // region location, when we have it
                LLVector3 loc = gAgent.getPositionAgent();
                sBugSplatSender->resetAppIdentifier(
                    WCSTR(STRINGIZE(gAgent.getRegion()->getName()
                                    << '/' << loc.mV[0]
                                    << '/' << loc.mV[1]
                                    << '/' << loc.mV[2])));
            }
        } // MDSCB_EXCEPTIONCODE

        return false;
    }
}
#endif // LL_BUGSPLAT

namespace
{
    void (*gOldTerminateHandler)() = NULL;
}

static void exceptionTerminateHandler()
{
	// reinstall default terminate() handler in case we re-terminate.
	if (gOldTerminateHandler) std::set_terminate(gOldTerminateHandler);
	// treat this like a regular viewer crash, with nice stacktrace etc.
    long *null_ptr;
    null_ptr = 0;
    *null_ptr = 0xDEADBEEF; //Force an exception that will trigger breakpad.

	// we've probably been killed-off before now, but...
	gOldTerminateHandler(); // call old terminate() handler
}

LONG WINAPI catchallCrashHandler(EXCEPTION_POINTERS * /*ExceptionInfo*/)
{
	LL_WARNS() << "Hit last ditch-effort attempt to catch crash." << LL_ENDL;
	exceptionTerminateHandler();
	return 0;
}

// *FIX:Mani - This hack is to fix a linker issue with libndofdev.lib
// The lib was compiled under VS2005 - in VS2003 we need to remap assert
#ifdef LL_DEBUG
#ifdef LL_MSVC7 
extern "C" {
    void _wassert(const wchar_t * _Message, const wchar_t *_File, unsigned _Line)
    {
        LL_ERRS() << _Message << LL_ENDL;
    }
}
#endif
#endif

const std::string LLAppViewerWin32::sWindowClass = "Second Life";

/*
    This function is used to print to the command line a text message 
    describing the nvapi error and quits
*/
void nvapi_error(NvAPI_Status status)
{
    NvAPI_ShortString szDesc = {0};
	NvAPI_GetErrorMessage(status, szDesc);
	LL_WARNS() << szDesc << LL_ENDL;

	//should always trigger when asserts are enabled
	//llassert(status == NVAPI_OK);
}

// Create app mutex creates a unique global windows object. 
// If the object can be created it returns true, otherwise
// it returns false. The false result can be used to determine 
// if another instance of a second life app (this vers. or later)
// is running.
// *NOTE: Do not use this method to run a single instance of the app.
// This is intended to help debug problems with the cross-platform 
// locked file method used for that purpose.
bool create_app_mutex()
{
	bool result = true;
	LPCWSTR unique_mutex_name = L"SecondLifeAppMutex";
	HANDLE hMutex;
	hMutex = CreateMutex(NULL, TRUE, unique_mutex_name); 
	if(GetLastError() == ERROR_ALREADY_EXISTS) 
	{     
		result = false;
	}
	return result;
}

void ll_nvapi_init(NvDRSSessionHandle hSession)
{
	// (2) load all the system settings into the session
	NvAPI_Status status = NvAPI_DRS_LoadSettings(hSession);
	if (status != NVAPI_OK) 
	{
		nvapi_error(status);
		return;
	}

	NvAPI_UnicodeString profile_name;
	std::string app_name = LLTrans::getString("APP_NAME");
	llutf16string w_app_name = utf8str_to_utf16str(app_name);
	wsprintf(profile_name, L"%s", w_app_name.c_str());
	// <FS:Ansariel> FIRE-16667 / BUG-9906: Viewer messing up the global NVIDIA driver profile
	//status = NvAPI_DRS_SetCurrentGlobalProfile(hSession, profile_name);
	//if (status != NVAPI_OK)
	//{
	//	nvapi_error(status);
	//	return;
	//}

	//// (3) Obtain the current profile. 
	//NvDRSProfileHandle hProfile = 0;
	//status = NvAPI_DRS_GetCurrentGlobalProfile(hSession, &hProfile);
	//if (status != NVAPI_OK) 
	//{
	//	nvapi_error(status);
	//	return;
	//}

	NvDRSProfileHandle hProfile = 0;
	// Check if we already have a Firestorm profile
	status = NvAPI_DRS_FindProfileByName(hSession, profile_name, &hProfile);
	if (status != NVAPI_OK && status != NVAPI_PROFILE_NOT_FOUND)
	{
		nvapi_error(status);
		return;
	}
	else if (status == NVAPI_PROFILE_NOT_FOUND)
	{
		// Don't have a Firestorm profile yet - create one
		LL_INFOS() << "Creating Firestorm profile for NVIDIA driver" << LL_ENDL;

		NVDRS_PROFILE profileInfo;
		profileInfo.version = NVDRS_PROFILE_VER;
		profileInfo.isPredefined = 0;
		wsprintf(profileInfo.profileName, L"%s", w_app_name.c_str());

		status = NvAPI_DRS_CreateProfile(hSession, &profileInfo, &hProfile);
		if (status != NVAPI_OK)
		{
			nvapi_error(status);
			return;
		}
	}

	// Check if current exe is part of the profile
	std::string exe_name = gDirUtilp->getExecutableFilename();
	NVDRS_APPLICATION profile_application;
	profile_application.version = NVDRS_APPLICATION_VER;

	llutf16string w_exe_name = utf8str_to_utf16str(exe_name);
	NvAPI_UnicodeString profile_app_name;
	wsprintf(profile_app_name, L"%s", w_exe_name.c_str());

	status = NvAPI_DRS_GetApplicationInfo(hSession, hProfile, profile_app_name, &profile_application);
	if (status != NVAPI_OK && status != NVAPI_EXECUTABLE_NOT_FOUND)
	{
		nvapi_error(status);
		return;
	}
	else if (status == NVAPI_EXECUTABLE_NOT_FOUND)
	{
		LL_INFOS() << "Creating application for " << exe_name << " for NVIDIA driver" << LL_ENDL;

		// Add this exe to the profile
		NVDRS_APPLICATION application;
		application.version = NVDRS_APPLICATION_VER;
		application.isPredefined = 0;
		wsprintf(application.appName, L"%s", w_exe_name.c_str());
		wsprintf(application.userFriendlyName, L"%s", w_exe_name.c_str());
		wsprintf(application.launcher, L"%s", w_exe_name.c_str());
		wsprintf(application.fileInFolder, L"%s", "");

		status = NvAPI_DRS_CreateApplication(hSession, hProfile, &application);
		if (status != NVAPI_OK)
		{
			nvapi_error(status);
			return;
		}

		// Save application in case we added one
		status = NvAPI_DRS_SaveSettings(hSession);
		if (status != NVAPI_OK) 
		{
			nvapi_error(status);
			return;
		}
	}
	// </FS:Ansariel>

	// load settings for querying 
	status = NvAPI_DRS_LoadSettings(hSession);
	if (status != NVAPI_OK)
	{
		nvapi_error(status);
		return;
	}

	//get the preferred power management mode for Second Life
	NVDRS_SETTING drsSetting = {0};
	drsSetting.version = NVDRS_SETTING_VER;
	status = NvAPI_DRS_GetSetting(hSession, hProfile, PREFERRED_PSTATE_ID, &drsSetting);
	if (status == NVAPI_SETTING_NOT_FOUND)
	{ //only override if the user hasn't specifically set this setting
		// (4) Specify that we want the VSYNC disabled setting
		// first we fill the NVDRS_SETTING struct, then we call the function
		drsSetting.version = NVDRS_SETTING_VER;
		drsSetting.settingId = PREFERRED_PSTATE_ID;
		drsSetting.settingType = NVDRS_DWORD_TYPE;
		drsSetting.u32CurrentValue = PREFERRED_PSTATE_PREFER_MAX;
		status = NvAPI_DRS_SetSetting(hSession, hProfile, &drsSetting);
		if (status != NVAPI_OK) 
		{
			nvapi_error(status);
			return;
		}

        // (5) Now we apply (or save) our changes to the system
        status = NvAPI_DRS_SaveSettings(hSession);
        if (status != NVAPI_OK) 
        {
            nvapi_error(status);
            return;
        }
	}
	else if (status != NVAPI_OK)
	{
		nvapi_error(status);
		return;
	}
}

//#define DEBUGGING_SEH_FILTER 1
#if DEBUGGING_SEH_FILTER
#	define WINMAIN DebuggingWinMain
#else
#	define WINMAIN wWinMain
#endif

int APIENTRY WINMAIN(HINSTANCE hInstance,
                     HINSTANCE hPrevInstance,
                     PWSTR     pCmdLine,
                     int       nCmdShow)
{
    // Call Tracy first thing to have it allocate memory
    // https://github.com/wolfpld/tracy/issues/196
    LL_PROFILER_FRAME_END;
    LL_PROFILER_SET_THREAD_NAME("App");

	const S32 MAX_HEAPS = 255;
	DWORD heap_enable_lfh_error[MAX_HEAPS];
	S32 num_heaps = 0;
	
	// <FS:Ansariel> Set via manifest
	//LLWindowWin32::setDPIAwareness();

#if WINDOWS_CRT_MEM_CHECKS && !INCLUDE_VLD
	_CrtSetDbgFlag ( _CRTDBG_ALLOC_MEM_DF | _CRTDBG_LEAK_CHECK_DF ); // dump memory leaks on exit
#elif 0
	// Experimental - enable the low fragmentation heap
	// This results in a 2-3x improvement in opening a new Inventory window (which uses a large numebr of allocations)
	// Note: This won't work when running from the debugger unless the _NO_DEBUG_HEAP environment variable is set to 1

	// Enable to get mem debugging within visual studio.
#if LL_DEBUG
	_CrtSetDbgFlag(_CRTDBG_ALLOC_MEM_DF | _CRTDBG_LEAK_CHECK_DF);
#else
	_CrtSetDbgFlag(0); // default, just making explicit
	
	ULONG ulEnableLFH = 2;
	HANDLE* hHeaps = new HANDLE[MAX_HEAPS];
	num_heaps = GetProcessHeaps(MAX_HEAPS, hHeaps);
	for(S32 i = 0; i < num_heaps; i++)
	{
		bool success = HeapSetInformation(hHeaps[i], HeapCompatibilityInformation, &ulEnableLFH, sizeof(ulEnableLFH));
		if (success)
			heap_enable_lfh_error[i] = 0;
		else
			heap_enable_lfh_error[i] = GetLastError();
	}
#endif
#endif
	
	// *FIX: global
	gIconResource = MAKEINTRESOURCE(IDI_LL_ICON);

	LLAppViewerWin32* viewer_app_ptr = new LLAppViewerWin32(ll_convert_wide_to_string(pCmdLine).c_str());

	gOldTerminateHandler = std::set_terminate(exceptionTerminateHandler);

	viewer_app_ptr->setErrorHandler(LLAppViewer::handleViewerCrash);

	// Set a debug info flag to indicate if multiple instances are running.
	bool found_other_instance = !create_app_mutex();
	gDebugInfo["FoundOtherInstanceAtStartup"] = LLSD::Boolean(found_other_instance);

	bool ok = viewer_app_ptr->init();
	if(!ok)
	{
		LL_WARNS() << "Application init failed." << LL_ENDL;
		return -1;
	}
	
	NvAPI_Status status;
    
	// Initialize NVAPI
	status = NvAPI_Initialize();
	NvDRSSessionHandle hSession = 0;

    if (status == NVAPI_OK) 
	{
		// Create the session handle to access driver settings
		status = NvAPI_DRS_CreateSession(&hSession);
		if (status != NVAPI_OK) 
		{
			nvapi_error(status);
		}
		else
		{
			//override driver setting as needed
			ll_nvapi_init(hSession);
		}
	}

	// Have to wait until after logging is initialized to display LFH info
	if (num_heaps > 0)
	{
		LL_INFOS() << "Attempted to enable LFH for " << num_heaps << " heaps." << LL_ENDL;
		for(S32 i = 0; i < num_heaps; i++)
		{
			if (heap_enable_lfh_error[i])
			{
				LL_INFOS() << "  Failed to enable LFH for heap: " << i << " Error: " << heap_enable_lfh_error[i] << LL_ENDL;
			}
		}
	}
	
	// Run the application main loop
	while (! viewer_app_ptr->frame()) 
	{}

	if (!LLApp::isError())
	{
		//
		// We don't want to do cleanup here if the error handler got called -
		// the assumption is that the error handler is responsible for doing
		// app cleanup if there was a problem.
		//
#if WINDOWS_CRT_MEM_CHECKS
		LL_INFOS() << "CRT Checking memory:" << LL_ENDL;
		if (!_CrtCheckMemory())
		{
			LL_WARNS() << "_CrtCheckMemory() failed at prior to cleanup!" << LL_ENDL;
		}
		else
		{
			LL_INFOS() << " No corruption detected." << LL_ENDL;
		}
#endif

		gGLActive = TRUE;

		viewer_app_ptr->cleanup();

#if WINDOWS_CRT_MEM_CHECKS
		LL_INFOS() << "CRT Checking memory:" << LL_ENDL;
		if (!_CrtCheckMemory())
		{
			LL_WARNS() << "_CrtCheckMemory() failed after cleanup!" << LL_ENDL;
		}
		else
		{
			LL_INFOS() << " No corruption detected." << LL_ENDL;
		}
#endif

	}
	delete viewer_app_ptr;
	viewer_app_ptr = NULL;

	// (NVAPI) (6) We clean up. This is analogous to doing a free()
	if (hSession)
	{
		NvAPI_DRS_DestroySession(hSession);
		hSession = 0;
	}
	
	return 0;
}

#if DEBUGGING_SEH_FILTER
// The compiler doesn't like it when you use __try/__except blocks
// in a method that uses object destructors. Go figure.
// This winmain just calls the real winmain inside __try.
// The __except calls our exception filter function. For debugging purposes.
int APIENTRY wWinMain(HINSTANCE hInstance,
                     HINSTANCE hPrevInstance,
                     PWSTR     lpCmdLine,
                     int       nCmdShow)
{
    __try
    {
        WINMAIN(hInstance, hPrevInstance, lpCmdLine, nCmdShow);
    }
    __except( viewer_windows_exception_handler( GetExceptionInformation() ) )
    {
        _tprintf( _T("Exception handled.\n") );
    }
}
#endif

void LLAppViewerWin32::disableWinErrorReporting()
{
	std::string executable_name = gDirUtilp->getExecutableFilename();

	if( S_OK == WerAddExcludedApplication( utf8str_to_utf16str(executable_name).c_str(), FALSE ) )
	{
		LL_INFOS() << "WerAddExcludedApplication() succeeded for " << executable_name << LL_ENDL;
	}
	else
	{
		LL_INFOS() << "WerAddExcludedApplication() failed for " << executable_name << LL_ENDL;
	}
}

const S32 MAX_CONSOLE_LINES = 7500;
// Only defined in newer SDKs than we currently use
#ifndef ENABLE_VIRTUAL_TERMINAL_PROCESSING
#define ENABLE_VIRTUAL_TERMINAL_PROCESSING 4
#endif

namespace {

void set_stream(const char* desc, FILE* fp, DWORD handle_id, const char* name, const char* mode="w");

bool create_console()
{
    // allocate a console for this app
    const bool isConsoleAllocated = AllocConsole();

    if (isConsoleAllocated)
    {
        // set the screen buffer to be big enough to let us scroll text
        CONSOLE_SCREEN_BUFFER_INFO coninfo;
        GetConsoleScreenBufferInfo(GetStdHandle(STD_OUTPUT_HANDLE), &coninfo);
        coninfo.dwSize.Y = MAX_CONSOLE_LINES;
        SetConsoleScreenBufferSize(GetStdHandle(STD_OUTPUT_HANDLE), coninfo.dwSize);

        // redirect unbuffered STDOUT to the console
        set_stream("stdout", stdout, STD_OUTPUT_HANDLE, "CONOUT$");
        // redirect unbuffered STDERR to the console
        set_stream("stderr", stderr, STD_ERROR_HANDLE, "CONOUT$");
        // redirect unbuffered STDIN to the console
        // Don't bother: our console is solely for log output. We never read stdin.
//      set_stream("stdin", stdin, STD_INPUT_HANDLE, "CONIN$", "r");
    }

    return isConsoleAllocated;
}

void set_stream(const char* desc, FILE* fp, DWORD handle_id, const char* name, const char* mode)
{
    // SL-13528: This code used to be based on
    // http://dslweb.nwnexus.com/~ast/dload/guicon.htm
    // (referenced in https://stackoverflow.com/a/191880).
    // But one of the comments on that StackOverflow answer points out that
    // assigning to *stdout or *stderr "probably doesn't even work with the
    // Universal CRT that was introduced in 2015," suggesting freopen_s()
    // instead. Code below is based on https://stackoverflow.com/a/55875595.
    auto std_handle = GetStdHandle(handle_id);
    if (std_handle == INVALID_HANDLE_VALUE)
    {
        LL_WARNS() << "create_console() failed to get " << desc << " handle" << LL_ENDL;
    }
    else
    {
        if (mode == std::string("w"))
        {
            // Enable color processing on Windows 10 console windows.
            DWORD dwMode = 0;
            GetConsoleMode(std_handle, &dwMode);
            dwMode |= ENABLE_VIRTUAL_TERMINAL_PROCESSING;
            SetConsoleMode(std_handle, dwMode);
        }
        // Redirect the passed fp to the console.
        FILE* ignore;
        if (freopen_s(&ignore, name, mode, fp) == 0)
        {
            // use unbuffered I/O
            setvbuf( fp, NULL, _IONBF, 0 );
        }
    }
}

} // anonymous namespace

LLAppViewerWin32::LLAppViewerWin32(const char* cmd_line) :
	mCmdLine(cmd_line),
	mIsConsoleAllocated(false)
{
}

LLAppViewerWin32::~LLAppViewerWin32()
{
}

// <FS:ND> Check if %TEMP% is defined and accessible (see FIRE-29623, sometimes BugSplat has problems to access TEMP, try to find out why)
static void checkTemp()
{
	char *pTemp{ getenv("TEMP") };
	if (!pTemp)
	{
		LL_WARNS() << "%TEMP% is not set" << LL_ENDL;
	}
	else
	{
		LL_INFOS() << "%TEMP%: " << pTemp << LL_ENDL;
		DWORD dwAttr = ::GetFileAttributesA(pTemp);
		DWORD dwLE = ::GetLastError();
		if (dwAttr == INVALID_FILE_ATTRIBUTES)
		{
			LL_WARNS() << "%TEMP%: " << pTemp << " GetFileAttributesA failed, last error: " << dwLE << LL_ENDL;
		}
		else if (0 == (dwAttr & FILE_ATTRIBUTE_DIRECTORY))
		{
			LL_WARNS() << "%TEMP%: " << pTemp << " is not a directory" << LL_ENDL;
		}
		else
		{
			LLUUID id = LLUUID::generateNewID();
			std::string strFile{ pTemp };
			if (strFile[strFile.size() - 1] != '/' && strFile[strFile.size() - 1] != '\\')
				strFile += "\\";

			strFile += id.asString();
			FILE *fp = fopen(strFile.c_str(), "w");
			if (!fp)
			{
				LL_WARNS() << "%TEMP%: " << pTemp << " cannot create file " << strFile << LL_ENDL;
			}
			else
			{
				fclose(fp);
				remove(strFile.c_str());
				LL_INFOS() << "%TEMP%: " << pTemp << " successfully created file " << strFile << LL_ENDL;
			}
		}
	}
}
// </FS:ND>

bool LLAppViewerWin32::init()
{
	bool success{ false }; // <FS:ND/> For BugSplat we need to call base::init() early on or there's no access to settings.
	// Platform specific initialization.

	// Turn off Windows Error Reporting
	// (Don't send our data to Microsoft--at least until we are Logo approved and have a way
	// of getting the data back from them.)
	//
	LL_INFOS() << "Turning off Windows error reporting." << LL_ENDL;
	disableWinErrorReporting();

#ifndef LL_RELEASE_FOR_DOWNLOAD
	// Merely requesting the LLSingleton instance initializes it.
	LLWinDebug::instance();
#endif

#if LL_SEND_CRASH_REPORTS
#if ! defined(LL_BUGSPLAT)
#pragma message("Building without BugSplat")

#else // LL_BUGSPLAT
#pragma message("Building with BugSplat")
	// <FS:ND> Pre BugSplat dance, make sure settings are valid, query crash behavior and then set up Bugsplat accordingly"
    //if (!isSecondInstance())
    //{
    //    // Cleanup previous session
    //    std::string log_file = gDirUtilp->getExpandedFilename(LL_PATH_LOGS, "bugsplat.log");
    //    LLFile::remove(log_file, ENOENT);
    //}

	success = LLAppViewer::init();
	if (!success)
		return false;

	checkTemp(); // Always do and log this, no matter if using Bugsplat or not

	// Save those early so we don't have to deal with the dynamic memory during in process crash handling.
	FS::LogfileIn = ll_convert_string_to_wide(gDirUtilp->getExpandedFilename(LL_PATH_LOGS, "Firestorm.log"));
	FS::LogfileOut = ll_convert_string_to_wide(gDirUtilp->getExpandedFilename(LL_PATH_DUMP, "Firestorm.log"));
	FS::DumpFile = ll_convert_string_to_wide(gDirUtilp->getExpandedFilename(LL_PATH_DUMP, "Firestorm.dmp"));

	S32 nCrashSubmitBehavior = gCrashSettings.getS32("CrashSubmitBehavior");
	// Don't ever send? bail out!
	if (nCrashSubmitBehavior == 2 /*CRASH_BEHAVIOR_NEVER_SEND*/)
		return success;

	DWORD dwAsk{ MDSF_NONINTERACTIVE };
	if (nCrashSubmitBehavior == 0 /*CRASH_BEHAVIOR_ASK*/)
		dwAsk = 0;
	// </FS:ND>
	
	std::string build_data_fname(
		gDirUtilp->getExpandedFilename(LL_PATH_EXECUTABLE, "build_data.json"));
	// Use llifstream instead of std::ifstream because LL_PATH_EXECUTABLE
	// could contain non-ASCII characters, which std::ifstream doesn't handle.
	llifstream inf(build_data_fname.c_str());
	if (! inf.is_open())
	{
		LL_WARNS("BUGSPLAT") << "Can't initialize BugSplat, can't read '" << build_data_fname
				   << "'" << LL_ENDL;
	}
	else
	{
		Json::Reader reader;
		Json::Value build_data;
		if (! reader.parse(inf, build_data, false)) // don't collect comments
		{
			// gah, the typo is baked into Json::Reader API
			LL_WARNS("BUGSPLAT") << "Can't initialize BugSplat, can't parse '" << build_data_fname
					   << "': " << reader.getFormatedErrorMessages() << LL_ENDL;
		}
		else
		{
			Json::Value BugSplat_DB = build_data["BugSplat DB"];
			if (! BugSplat_DB)
			{
				LL_WARNS("BUGSPLAT") << "Can't initialize BugSplat, no 'BugSplat DB' entry in '"
						   << build_data_fname << "'" << LL_ENDL;
			}
			else
			{
				// Got BugSplat_DB, onward!
				std::wstring version_string(WSTRINGIZE(LL_VIEWER_VERSION_MAJOR << '.' <<
													   LL_VIEWER_VERSION_MINOR << '.' <<
													   LL_VIEWER_VERSION_PATCH << '.' <<
													   LL_VIEWER_VERSION_BUILD));

				// <FS:ND> Set up Bugsplat to ask or always send
                //DWORD dwFlags = MDSF_NONINTERACTIVE | // automatically submit report without prompting
                //                MDSF_PREVENTHIJACKING; // disallow swiping Exception filter
                DWORD dwFlags = dwAsk |
                                MDSF_PREVENTHIJACKING; // disallow swiping Exception filter
				// </FS:ND>

                //bool needs_log_file = !isSecondInstance() && debugLoggingEnabled("BUGSPLAT");
                //if (needs_log_file)
                //{
                //    // Startup only!
                //    LL_INFOS("BUGSPLAT") << "Engaged BugSplat logging to bugsplat.log" << LL_ENDL;
                //    dwFlags |= MDSF_LOGFILE | MDSF_LOG_VERBOSE;
                //}

				// have to convert normal wide strings to strings of __wchar_t
				sBugSplatSender = new MiniDmpSender(
					WCSTR(BugSplat_DB.asString()),
					WCSTR(LL_TO_WSTRING(LL_VIEWER_CHANNEL)),
					WCSTR(version_string),
					nullptr,              // szAppIdentifier -- set later
					dwFlags);

				sBugSplatSender->setCallback(bugsplatSendLog);

                //if (needs_log_file)
                //{
                //    // Log file will be created in %TEMP%, but it will be moved into logs folder in case of crash
                //    std::string log_file = gDirUtilp->getExpandedFilename(LL_PATH_LOGS, "bugsplat.log");
                //    sBugSplatSender->setLogFilePath(WCSTR(log_file));
                //}

				// engage stringize() overload that converts from wstring
				LL_INFOS("BUGSPLAT") << "Engaged BugSplat(" << LL_TO_STRING(LL_VIEWER_CHANNEL)
						   << ' ' << stringize(version_string) << ')' << LL_ENDL;
			} // got BugSplat_DB
		} // parsed build_data.json
	} // opened build_data.json

#endif // LL_BUGSPLAT
#endif // LL_SEND_CRASH_REPORTS

	// <FS:ND> base::init() was potentially called earlier.
	// bool success = LLAppViewer::init();
	// </FS:ND>

	if( !success )
		success = LLAppViewer::init();

    return success;
}

bool LLAppViewerWin32::cleanup()
{
	bool result = LLAppViewer::cleanup();

	gDXHardware.cleanup();

	if (mIsConsoleAllocated)
	{
		FreeConsole();
		mIsConsoleAllocated = false;
	}

	return result;
}

void LLAppViewerWin32::reportCrashToBugsplat(void* pExcepInfo)
{
#if defined(LL_BUGSPLAT)
    if (sBugSplatSender)
    {
        sBugSplatSender->createReport((EXCEPTION_POINTERS*)pExcepInfo);
    }
#endif // LL_BUGSPLAT
}

void LLAppViewerWin32::initLoggingAndGetLastDuration()
{
	LLAppViewer::initLoggingAndGetLastDuration();
}

void LLAppViewerWin32::initConsole()
{
	// pop up debug console
	mIsConsoleAllocated = create_console();
	return LLAppViewer::initConsole();
}

void write_debug_dx(const char* str)
{
	std::string value = gDebugInfo["DXInfo"].asString();
	value += str;
	gDebugInfo["DXInfo"] = value;
}

void write_debug_dx(const std::string& str)
{
	write_debug_dx(str.c_str());
}

bool LLAppViewerWin32::initHardwareTest()
{
	//
	// Do driver verification and initialization based on DirectX
	// hardware polling and driver versions
	//
	if (/*TRUE == gSavedSettings.getBOOL("ProbeHardwareOnStartup") &&*/ FALSE == gSavedSettings.getBOOL("NoHardwareProbe")) // <FS:Ansariel> FIRE-20378 / FIRE-20382: Breaks memory detection an 4K monitor workaround
	{
		// per DEV-11631 - disable hardware probing for everything
		// but vram.
		BOOL vram_only = TRUE;

		LLSplashScreen::update(LLTrans::getString("StartupDetectingHardware"));

		LL_DEBUGS("AppInit") << "Attempting to poll DirectX for hardware info" << LL_ENDL;
		gDXHardware.setWriteDebugFunc(write_debug_dx);
		// <FS:Ansariel> FIRE-15891: Add option to disable WMI check in case of problems
		//BOOL probe_ok = gDXHardware.getInfo(vram_only);
		BOOL probe_ok = gDXHardware.getInfo(vram_only, gSavedSettings.getBOOL("FSDisableWMIProbing"));
		// </FS:Ansariel>

		if (!probe_ok
			&& gWarningSettings.getBOOL("AboutDirectX9"))
		{
			LL_WARNS("AppInit") << "DirectX probe failed, alerting user." << LL_ENDL;

			// Warn them that runnin without DirectX 9 will
			// not allow us to tell them about driver issues
			std::ostringstream msg;
			msg << LLTrans::getString ("MBNoDirectX");
			S32 button = OSMessageBox(
				msg.str(),
				LLTrans::getString("MBWarning"),
				OSMB_YESNO);
			if (OSBTN_NO== button)
			{
				LL_INFOS("AppInit") << "User quitting after failed DirectX 9 detection" << LL_ENDL;
				LLWeb::loadURLExternal("http://www.firestormviewer.org/support", false);
				return false;
			}
			gWarningSettings.setBOOL("AboutDirectX9", FALSE);
		}
		LL_DEBUGS("AppInit") << "Done polling DirectX for hardware info" << LL_ENDL;

		// Only probe once after installation
		gSavedSettings.setBOOL("ProbeHardwareOnStartup", FALSE);

		// Disable so debugger can work
		std::string splash_msg;
		LLStringUtil::format_map_t args;
		args["[APP_NAME]"] = LLAppViewer::instance()->getSecondLifeTitle();
		args["[CURRENT_GRID]"] = LLGridManager::getInstance()->getGridLabel();
		splash_msg = LLTrans::getString("StartupLoading", args);

		LLSplashScreen::update(splash_msg);
	}

	if (!restoreErrorTrap())
	{
		LL_WARNS("AppInit") << " Someone took over my exception handler (post hardware probe)!" << LL_ENDL;
	}

	if (gGLManager.mVRAM == 0)
	{
		// <FS:Ansariel> FIRE-12671: Force VRAM if DirectX detection is broken
		S32 forced_video_memory;
		if ((forced_video_memory = gSavedSettings.getS32("FSForcedVideoMemory")) > 0)
		{
			LL_INFOS("AppInit") << "Forcing VRAM to " << forced_video_memory << " MB" << LL_ENDL;
			gGLManager.mVRAM = forced_video_memory;
		}
		else
		// </FS:Ansariel>
		gGLManager.mVRAM = gDXHardware.getVRAM();
	}

	LL_INFOS("AppInit") << "Detected VRAM: " << gGLManager.mVRAM << LL_ENDL;

	return true;
}

bool LLAppViewerWin32::initParseCommandLine(LLCommandLineParser& clp)
{
	if (!clp.parseCommandLineString(mCmdLine))
	{
		return false;
	}

	// Find the system language.
	FL_Locale *locale = NULL;
	FL_Success success = FL_FindLocale(&locale, FL_MESSAGES);
	if (success != 0)
	{
		if (success >= 2 && locale->lang) // confident!
		{
			LL_INFOS("AppInit") << "Language: " << ll_safe_string(locale->lang) << LL_ENDL;
			LL_INFOS("AppInit") << "Location: " << ll_safe_string(locale->country) << LL_ENDL;
			LL_INFOS("AppInit") << "Variant: " << ll_safe_string(locale->variant) << LL_ENDL;
			LLControlVariable* c = gSavedSettings.getControl("SystemLanguage");
			if(c)
			{
				c->setValue(std::string(locale->lang), false);
			}
		}
	}
	FL_FreeLocale(&locale);

	return true;
}

bool LLAppViewerWin32::beingDebugged()
{
    return IsDebuggerPresent();
}

bool LLAppViewerWin32::restoreErrorTrap()
{	
	return true; // we don't check for handler collisions on windows, so just say they're ok
}

//virtual
bool LLAppViewerWin32::sendURLToOtherInstance(const std::string& url)
{
	wchar_t window_class[256]; /* Flawfinder: ignore */   // Assume max length < 255 chars.
	mbstowcs(window_class, sWindowClass.c_str(), 255);
	window_class[255] = 0;
	// Use the class instead of the window name.
	HWND other_window = FindWindow(window_class, NULL);

	if (other_window != NULL)
	{
		LL_DEBUGS() << "Found other window with the name '" << getWindowTitle() << "'" << LL_ENDL;
		COPYDATASTRUCT cds;
		const S32 SLURL_MESSAGE_TYPE = 0;
		cds.dwData = SLURL_MESSAGE_TYPE;
		cds.cbData = url.length() + 1;
		cds.lpData = (void*)url.c_str();

		LRESULT msg_result = SendMessage(other_window, WM_COPYDATA, NULL, (LPARAM)&cds);
		LL_DEBUGS() << "SendMessage(WM_COPYDATA) to other window '" 
				 << getWindowTitle() << "' returned " << msg_result << LL_ENDL;
		return true;
	}
	return false;
}


std::string LLAppViewerWin32::generateSerialNumber()
{
	char serial_md5[MD5HEX_STR_SIZE];		// Flawfinder: ignore
	serial_md5[0] = 0;

	DWORD serial = 0;
	DWORD flags = 0;
	BOOL success = GetVolumeInformation(
			L"C:\\",
			NULL,		// volume name buffer
			0,			// volume name buffer size
			&serial,	// volume serial
			NULL,		// max component length
			&flags,		// file system flags
			NULL,		// file system name buffer
			0);			// file system name buffer size
	if (success)
	{
		LLMD5 md5;
		md5.update( (unsigned char*)&serial, sizeof(DWORD));
		md5.finalize();
		md5.hex_digest(serial_md5);
	}
	else
	{
		LL_WARNS() << "GetVolumeInformation failed" << LL_ENDL;
	}
	return serial_md5;
}

// <FS:ND> Thread to purge old texture cache in the background.
// The cache dir will be search for directories named *.old_texturecache, then each of this directories
// will be deleted.
// The thread will be started each time the viewer starts, just in case there is directories so huge,
// the user quit the viewer before the old cache was fully cleared.
void deleteFilesInDirectory( std::wstring aDir )
{
	if( aDir == L"." || aDir == L".." || aDir.empty() )
		return;

	if( aDir[ aDir.size() -1 ] != '\\' || aDir[ aDir.size() -1 ] != '/' )
		aDir += L"\\";

	WIN32_FIND_DATA oFindData;
	HANDLE hFindHandle = ::FindFirstFile( (aDir + L"*.*").c_str(), &oFindData );

	if( INVALID_HANDLE_VALUE == hFindHandle )
		return;

	do
	{
		if( ! (oFindData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY ) )
		{
			std::wstring strFile = aDir + oFindData.cFileName;
			if( oFindData.dwFileAttributes & FILE_ATTRIBUTE_READONLY )
				::SetFileAttributes( strFile.c_str(), FILE_ATTRIBUTE_NORMAL );

			::DeleteFile( ( aDir + oFindData.cFileName ).c_str() );
		}
	} while( ::FindNextFile( hFindHandle, &oFindData ) );

	::FindClose( hFindHandle );
}

void deleteCacheDirectory( std::wstring aDir )
{
	if( aDir == L"." || aDir == L".." || aDir.empty() )
		return;

	if( aDir[ aDir.size() -1 ] != '\\' || aDir[ aDir.size() -1 ] != '/' )
		aDir += L"\\";

	wchar_t aCacheDirs[] = L"0123456789abcdef";

	for( int i = 0; i < _countof( aCacheDirs ); ++i )
	{
		deleteFilesInDirectory( aDir + aCacheDirs[i] );
		::RemoveDirectory( (aDir + aCacheDirs[i]).c_str() );
	}

	deleteFilesInDirectory( aDir );
	::RemoveDirectory( aDir.c_str() );
}

DWORD WINAPI purgeThread( LPVOID lpParameter )
{
	wchar_t *pDir = reinterpret_cast< wchar_t* >( lpParameter );
	if( !pDir )
		return 0;

	std::wstring strPath = pDir;
	free( pDir );

	if( strPath.empty() )
		return 0;

	if( strPath[ strPath.size() -1 ] != '\\' || strPath[ strPath.size() -1 ] != '/' )
		strPath += L"\\";

	WIN32_FIND_DATA oFindData;
	HANDLE hFindHandle = ::FindFirstFile( ( strPath + L"*.old_texturecache" ).c_str(), &oFindData );

	std::vector< std::wstring > vctDirs;

	if( INVALID_HANDLE_VALUE == hFindHandle )
		return 0;

	do
	{
		if( oFindData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY )
			vctDirs.push_back( strPath + oFindData.cFileName );
	} while( ::FindNextFile( hFindHandle, &oFindData ) );

	::FindClose( hFindHandle );

	for( auto dir : vctDirs )
	{
		LL_INFOS("CachePurge") << "Removing an old cache" << LL_ENDL;
		deleteCacheDirectory( dir );
	}

	return 0;
}

void LLAppViewerWin32::startCachePurge()
{
	if( isSecondInstance() )
		return;

	std::wstring strCacheDir = wstringize( gDirUtilp->getExpandedFilename( LL_PATH_CACHE, "" ) );

	HANDLE hThread = CreateThread( nullptr, 0, purgeThread, _wcsdup( strCacheDir.c_str() ), 0, nullptr );

	if( !hThread )
	{
		LL_WARNS("CachePurge") << "CreateThread failed: "  << GetLastError() << LL_ENDL;
	}
	else
		SetThreadPriority( hThread, THREAD_MODE_BACKGROUND_BEGIN );
}
// </FS:ND>
