#ifdef _WIN32

/*
	SDL_main.c, placed in the public domain by Sam Lantinga  4/13/98

	Modified to write stdout/stderr to a message box at shutdown by Ripper  2007-12-27

	The WinMain function -- calls your program's main() function
*/

#include <stdio.h>
#include <stdlib.h>
#include <time.h>

#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <wincrypt.h>

#ifdef _WIN32_WCE
# define DIR_SEPERATOR TEXT("\\")
# undef _getcwd
# define _getcwd(str,len)	wcscpy(str,TEXT(""))
# define setbuf(f,b)
# define setvbuf(w,x,y,z)
# define fopen		_wfopen
# define freopen	_wfreopen
# define remove(x)	DeleteFile(x)
#else
# define DIR_SEPERATOR TEXT("/")
# include <direct.h>
#endif

/* Include the SDL main definition header */
#include "SDL.h"
#include "SDL_main.h"
#include "SDL_syswm.h"

#ifdef main
# ifndef _WIN32_WCE_EMULATION
#  undef main
# endif /* _WIN32_WCE_EMULATION */
#endif /* main */

/* The standard output files */
#define STDOUT_FILE	TEXT("stdout.txt")
#define STDERR_FILE	TEXT("stderr.txt")

#ifndef NO_STDIO_REDIRECT
# ifdef _WIN32_WCE
static wchar_t stdoutPath[MAX_PATH];
static wchar_t stderrPath[MAX_PATH];
# else
static char stdoutPath[MAX_PATH];
static char stderrPath[MAX_PATH];
# endif
#else
#ifdef _MSC_VER
#define WinMain Unused_WinMain
#endif
#endif

#if defined(_WIN32_WCE) && _WIN32_WCE < 300
/* seems to be undefined in Win CE although in online help */
#define isspace(a) (((CHAR)a == ' ') || ((CHAR)a == '\t'))
#endif /* _WIN32_WCE < 300 */

bool CheckIsRunningFromCommandPrompt()
{
	HANDLE stdOutput = GetStdHandle(STD_OUTPUT_HANDLE);
	CONSOLE_SCREEN_BUFFER_INFO info;
	if(!GetConsoleScreenBufferInfo(stdOutput, &info))
		return false;
	return info.dwCursorPosition.X != 0 || info.dwCursorPosition.Y != 0;
}

/* Parse a command line buffer into arguments */
static int ParseCommandLine(char *cmdline, char **argv)
{
	char *bufp;
	int argc;

	argc = 0;
	for ( bufp = cmdline; *bufp; ) {
		/* Skip leading whitespace */
		while ( isspace(*bufp) ) {
			++bufp;
		}
		/* Skip over argument */
		if ( *bufp == '"' ) {
			++bufp;
			if ( *bufp ) {
				if ( argv ) {
					argv[argc] = bufp;
				}
				++argc;
			}
			/* Skip over word */
			while ( *bufp && (*bufp != '"') ) {
				++bufp;
			}
		} else {
			if ( *bufp ) {
				if ( argv ) {
					argv[argc] = bufp;
				}
				++argc;
			}
			/* Skip over word */
			while ( *bufp && ! isspace(*bufp) ) {
				++bufp;
			}
		}
		if ( *bufp ) {
			if ( argv ) {
				*bufp = '\0';
			}
			++bufp;
		}
	}
	if ( argv ) {
		argv[argc] = NULL;
	}
	return(argc);
}

/* Show an error message */
static void ShowError(const char *title, const char *message)
{
/* If USE_MESSAGEBOX is defined, you need to link with user32.lib */
#ifdef USE_MESSAGEBOX
	MessageBox(NULL, message, title, MB_ICONEXCLAMATION|MB_OK);
#else
	fprintf(stderr, "%s: %s\n", title, message);
#endif
}

/* Pop up an out of memory message, returns to Windows */
static BOOL OutOfMemory(void)
{
	ShowError("Fatal Error", "Out of memory - aborting");
	return FALSE;
}

/* Remove the output files if there was no output written */
static void cleanup_output(void)
{
#if 1
#ifndef NO_STDIO_REDIRECT
	FILE *file;
#endif
#endif

	/* Flush the output in case anything is queued */
	fclose(stdout);
	fclose(stderr);

#if 1
#ifndef NO_STDIO_REDIRECT
	/* See if the files have any output in them */
	if ( stdoutPath[0] ) {
		file = fopen(stdoutPath, TEXT("r"));
		if ( file ) {
			char buf[16384];
			size_t readbytes = fread(buf, 1, 16383, file);
			fclose(file);

			if(readbytes != 0)
			{
				buf[readbytes] = 0;     // cut after last byte (<=16383)
				MessageBox(NULL, buf, "Wolf4SDL", MB_OK);
			}
			else
				remove(stdoutPath);     // remove empty file
		}
	}
	if ( stderrPath[0] ) {
		file = fopen(stderrPath, TEXT("rb"));
		if ( file ) {
			char buf[16384];
			size_t readbytes = fread(buf, 1, 16383, file);
			fclose(file);

			if(readbytes != 0)
			{
				buf[readbytes] = 0;     // cut after last byte (<=16383)
				MessageBox(NULL, buf, "Wolf4SDL", MB_OK);
			}
			else
				remove(stderrPath);     // remove empty file
		}
	}
#endif
#endif
}

//#if defined(_MSC_VER) && !defined(_WIN32_WCE)
///* The VC++ compiler needs main defined */
//#define console_main main
//#endif

/* This is where execution begins [console apps] */
int console_main(int argc, char *argv[])
{
	size_t n;
	char *bufp, *appname;
	int status = 0;

	/* Get the class name from argv[0] */
	appname = argv[0];
	if ( (bufp=SDL_strrchr(argv[0], '\\')) != NULL ) {
		appname = bufp+1;
	} else
	if ( (bufp=SDL_strrchr(argv[0], '/')) != NULL ) {
		appname = bufp+1;
	}

	if ( (bufp=SDL_strrchr(appname, '.')) == NULL )
		n = SDL_strlen(appname);
	else
		n = (bufp-appname);

	bufp = SDL_stack_alloc(char, n+1);
	if ( bufp == NULL ) {
		return OutOfMemory();
	}
	SDL_strlcpy(bufp, appname, n+1);
	appname = bufp;

	/* Load SDL dynamic link library */
	if ( SDL_Init(SDL_INIT_NOPARACHUTE) < 0 ) {
		ShowError("WinMain() error", SDL_GetError());
		return(FALSE);
	}
	atexit(cleanup_output);

	/* Sam:
	We still need to pass in the application handle so that
	DirectInput will initialize properly when SDL_RegisterApp()
	is called later in the video initialization.
	*/
	SDL_SetModuleHandle(GetModuleHandle(NULL));

	/* Run the application main() code */
	//status = SDL_main(argc, argv);

	/* Exit cleanly, calling atexit() functions */
	exit(status);

	/* Hush little compiler, don't you cry... */
	return 0;
}

/* This is where execution begins [windowed apps] */
#ifdef _WIN32_WCE
int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrev, LPWSTR szCmdLine, int sw)
#else
int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrev, LPSTR szCmdLine, int sw)
#endif
{
	HINSTANCE handle;
	char **argv;
	int argc;
	char *cmdline;
#ifdef _WIN32_WCE
	wchar_t *bufp;
	int nLen;
#else
	char *bufp;
	size_t nLen;
#endif
#ifndef NO_STDIO_REDIRECT
	DWORD pathlen;
#ifdef _WIN32_WCE
	wchar_t path[MAX_PATH];
#else
	char path[MAX_PATH];
#endif
	FILE *newfp;
#endif

	/* Start up DDHELP.EXE before opening any files, so DDHELP doesn't
	keep them open.  This is a hack.. hopefully it will be fixed
	someday.  DDHELP.EXE starts up the first time DDRAW.DLL is loaded.
	*/
	handle = LoadLibrary(TEXT("DDRAW.DLL"));
	if ( handle != NULL ) {
		FreeLibrary(handle);
	}

#ifndef NO_STDIO_REDIRECT
	pathlen = GetModuleFileName(NULL, path, SDL_arraysize(path));
	while ( pathlen > 0 && path[pathlen] != '\\' ) {
		--pathlen;
	}
	path[pathlen] = '\0';

#ifdef _WIN32_WCE
	wcsncpy( stdoutPath, path, SDL_arraysize(stdoutPath) );
	wcsncat( stdoutPath, DIR_SEPERATOR STDOUT_FILE, SDL_arraysize(stdoutPath) );
#else
	SDL_strlcpy( stdoutPath, path, SDL_arraysize(stdoutPath) );
	SDL_strlcat( stdoutPath, DIR_SEPERATOR STDOUT_FILE, SDL_arraysize(stdoutPath) );
#endif

	/* Redirect standard input and standard output */
	newfp = freopen(stdoutPath, TEXT("w"), stdout);

#ifndef _WIN32_WCE
	if ( newfp == NULL ) {	/* This happens on NT */
#if !defined(stdout)
		stdout = fopen(stdoutPath, TEXT("w"));
#else
		newfp = fopen(stdoutPath, TEXT("w"));
		if ( newfp ) {
			*stdout = *newfp;
		}
#endif
	}
#endif /* _WIN32_WCE */

#ifdef _WIN32_WCE
	wcsncpy( stderrPath, path, SDL_arraysize(stdoutPath) );
	wcsncat( stderrPath, DIR_SEPERATOR STDOUT_FILE, SDL_arraysize(stdoutPath) );
#else
	SDL_strlcpy( stderrPath, path, SDL_arraysize(stderrPath) );
	SDL_strlcat( stderrPath, DIR_SEPERATOR STDERR_FILE, SDL_arraysize(stderrPath) );
#endif

	newfp = freopen(stderrPath, TEXT("w"), stderr);
#ifndef _WIN32_WCE
	if ( newfp == NULL ) {	/* This happens on NT */
#if !defined(stderr)
		stderr = fopen(stderrPath, TEXT("w"));
#else
		newfp = fopen(stderrPath, TEXT("w"));
		if ( newfp ) {
			*stderr = *newfp;
		}
#endif
	}
#endif /* _WIN32_WCE */

	setvbuf(stdout, NULL, _IOLBF, BUFSIZ);	/* Line buffered */
	setbuf(stderr, NULL);			/* No buffering */
#endif /* !NO_STDIO_REDIRECT */

#ifdef _WIN32_WCE
	nLen = wcslen(szCmdLine)+128+1;
	bufp = SDL_stack_alloc(wchar_t, nLen*2);
	wcscpy (bufp, TEXT("\""));
	GetModuleFileName(NULL, bufp+1, 128-3);
	wcscpy (bufp+wcslen(bufp), TEXT("\" "));
	wcsncpy(bufp+wcslen(bufp), szCmdLine,nLen-wcslen(bufp));
	nLen = wcslen(bufp)+1;
	cmdline = SDL_stack_alloc(char, nLen);
	if ( cmdline == NULL ) {
		return OutOfMemory();
	}
	WideCharToMultiByte(CP_ACP, 0, bufp, -1, cmdline, nLen, NULL, NULL);
#else
	/* Grab the command line */
	bufp = GetCommandLine();
	nLen = SDL_strlen(bufp)+1;
	cmdline = SDL_stack_alloc(char, nLen);
	if ( cmdline == NULL ) {
		return OutOfMemory();
	}
	SDL_strlcpy(cmdline, bufp, nLen);
#endif

	/* Parse it into argv and argc */
	argc = ParseCommandLine(cmdline, NULL);
	argv = SDL_stack_alloc(char*, argc+1);
	if ( argv == NULL ) {
		return OutOfMemory();
	}
	ParseCommandLine(cmdline, argv);

	/* Run the main program (after a little SDL initialization) */
	console_main(argc, argv);

	/* Hush little compiler, don't you cry... */
	return 0;
}

void SetupWM()
{
	struct SDL_SysWMinfo wmInfo;
	SDL_VERSION(&wmInfo.version);

	if(SDL_GetWMInfo(&wmInfo) != -1)
	{
		HWND hwndSDL = wmInfo.window;
		DWORD style = GetWindowLong(hwndSDL, GWL_STYLE) & ~WS_SYSMENU;
		SetWindowLong(hwndSDL, GWL_STYLE, style);
		SetWindowPos(hwndSDL, NULL, 0, 0, 0, 0, SWP_NOMOVE | SWP_NOSIZE | SWP_NOZORDER | SWP_FRAMECHANGED);
	}
}

//==========================================================================
//
// I_MakeRNGSeed
//
// Returns a 32-bit random seed, preferably one with lots of entropy.
//
/*
** i_system.cpp
** Timers, pre-console output, IWAD selection, and misc system routines.
**
**---------------------------------------------------------------------------
** Copyright 1998-2009 Randy Heit
** All rights reserved.
**
** Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions
** are met:
**
** 1. Redistributions of source code must retain the above copyright
**    notice, this list of conditions and the following disclaimer.
** 2. Redistributions in binary form must reproduce the above copyright
**    notice, this list of conditions and the following disclaimer in the
**    documentation and/or other materials provided with the distribution.
** 3. The name of the author may not be used to endorse or promote products
**    derived from this software without specific prior written permission.
**
** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
**---------------------------------------------------------------------------
**
*/
//
//==========================================================================

unsigned int I_MakeRNGSeed()
{
	unsigned int seed;

	// If RtlGenRandom is available, use that to avoid increasing the
	// working set by pulling in all of the crytographic API.
	HMODULE advapi = GetModuleHandle("advapi32.dll");
	if (advapi != NULL)
	{
		BOOLEAN (APIENTRY *RtlGenRandom)(void *, ULONG) =
			(BOOLEAN (APIENTRY *)(void *, ULONG))GetProcAddress(advapi, "SystemFunction036");
		if (RtlGenRandom != NULL)
		{
			if (RtlGenRandom(&seed, sizeof(seed)))
			{
				return seed;
			}
		}
	}

	// Use the full crytographic API to produce a seed. If that fails,
	// time() is used as a fallback.
	HCRYPTPROV prov;

	if (!CryptAcquireContext(&prov, NULL, MS_DEF_PROV, PROV_RSA_FULL, CRYPT_VERIFYCONTEXT))
	{
		return (unsigned int)time(NULL);
	}
	if (!CryptGenRandom(prov, sizeof(seed), (BYTE *)&seed))
	{
		seed = (unsigned int)time(NULL);
	}
	CryptReleaseContext(prov, 0);
	return seed;
}

#endif  // _WIN32
