/*
   This file is part of the KDE libraries
   Copyright (C) 2003-2007 Jaroslaw Staniek <js@iidea.pl>

   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public
   License version 2 as published by the Free Software Foundation.

   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
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public License
   along with this library; see the file COPYING.LIB.  If not, write to
   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
   Boston, MA 02110-1301, USA.
*/

#include <windows.h>

#include <sys/utsname.h>
#include <stdio.h>

typedef void (WINAPI *PGNSI)(LPSYSTEM_INFO);

#ifndef SM_SERVERR2
# define SM_SERVERR2 89
#endif

int kde_gethostname(char *__name, size_t __len);

/**
 MS Windows implementation of uname().

 E.g. on Windows 2000
 <code>
  utsname n;
  printf("%s, %s, %s, %s, %s\n", n.sysname, n.release, n.version, n.machine, n.nodename);
 </code>
 it will print something like: 
 <code>
  Microsoft Windows, 5.0 (2000 Professional), Dec 16 2004, i686, MYHOSTNAME
 </code>

 Note that utsname.version is just a compile time of kdewin32 library (__DATE__).
*/
KDEWIN32_EXPORT int uname(struct utsname *name)
{
	OSVERSIONINFOEX versioninfo;
	SYSTEM_INFO sysinfo;
	PGNSI pGNSI;
	unsigned int proctype;
	char valid_processor_level;
	char *ostype = 0;
	char *osproduct = 0;
	char tmpnodename[MAX_COMPUTERNAME_LENGTH+2];
	size_t tmpnodenamelen = MAX_COMPUTERNAME_LENGTH+1;
	BOOL osVersionInfoEx;

	if (!name)
		return -1;

	ZeroMemory(&sysinfo, sizeof(SYSTEM_INFO));
	ZeroMemory(&versioninfo, sizeof(OSVERSIONINFOEX));

	/* Try calling GetVersionEx using the OSVERSIONINFOEX, 
	 if that fails, try using the OSVERSIONINFO. */
	versioninfo.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEX);
	if ( !(osVersionInfoEx = GetVersionEx ((OSVERSIONINFO *) &versioninfo)) ) {
		versioninfo.dwOSVersionInfoSize = sizeof (OSVERSIONINFO);
		if (! GetVersionEx ( (OSVERSIONINFO *) &versioninfo) ) 
			return -1;
	}

	valid_processor_level = versioninfo.dwPlatformId == VER_PLATFORM_WIN32_NT 
		|| (versioninfo.dwPlatformId == VER_PLATFORM_WIN32_WINDOWS && versioninfo.dwMinorVersion >= 10 /*>= win98*/);

	/* Use GetNativeSystemInfo if supported or GetSystemInfo otherwise */
	pGNSI = (PGNSI) GetProcAddress(
		GetModuleHandle(TEXT("kernel32.dll")), "GetNativeSystemInfo");
	if (NULL != pGNSI)
		pGNSI(&sysinfo);
	else
		GetSystemInfo(&sysinfo);

	/* CPU type */
	switch (sysinfo.wProcessorArchitecture) {
	case PROCESSOR_ARCHITECTURE_INTEL:
		if (valid_processor_level) {
			if (sysinfo.wProcessorLevel<3)
				proctype = 3;
			else if (sysinfo.wProcessorLevel > 9) /*Pentium 4?*/
				proctype = 6;
			else /*typical*/
				proctype = sysinfo.wProcessorLevel;
		}
		else {
			if (sysinfo.dwProcessorType == PROCESSOR_INTEL_386
				|| sysinfo.dwProcessorType == PROCESSOR_INTEL_486)
				proctype = sysinfo.dwProcessorType / 100;
			else
				proctype = PROCESSOR_INTEL_PENTIUM / 100;
		}
		sprintf (name->machine, "i%d86", proctype);
		break;
	case PROCESSOR_ARCHITECTURE_ALPHA:
		strcpy (name->machine, "alpha");
		break;
	case PROCESSOR_ARCHITECTURE_MIPS:
		strcpy (name->machine, "mips");
		break;
	default:
		strcpy (name->machine, "unknown");
		break;
	}

	strncpy(name->sysname, "Microsoft Windows", 19);

	/* OS Type */
	switch (versioninfo.dwPlatformId) {
	case VER_PLATFORM_WIN32_NT:
		switch (versioninfo.dwMajorVersion) {
		case 3:
		case 4:
			ostype = "NT";
			break;
		case 5:
			switch (versioninfo.dwMinorVersion) {
			case 0:
				ostype = "2000";
				break;
			case 1:
				ostype = "XP";
				break;
			case 2:
				if( GetSystemMetrics(SM_SERVERR2) )
					ostype = "Server 2003 \"R2\"";
				else if( versioninfo.wProductType == VER_NT_WORKSTATION
				         && sysinfo.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64)
					ostype = "XP Professional x64 Edition";
				else
					ostype = "Server 2003";
				break;
			}
			break;
		case 6:
			switch (versioninfo.dwMinorVersion) {
			case 0:
				switch (versioninfo.wProductType) {
				case VER_NT_WORKSTATION:
					ostype = "Vista";
					break;
				default:
					ostype = "Server \"Longhorn\"";
					break;
				}
			default:
				break;
			}
			break;
		default:
			break;
		}
		break;
	case VER_PLATFORM_WIN32_WINDOWS:
		switch (versioninfo.dwMinorVersion) {
		case 0:
			ostype = "95";
			break;
		case 10:
			ostype = "98";
			break;
		case 90:
			ostype = "Me";
			break;
		default:
			break;
		}
		break;
	default:
		break;
	}

	/* Test for specific product on Windows NT 4.0 SP6 and later */
	if (osVersionInfoEx) {
		/* Workstation type */
		if ( versioninfo.wProductType == VER_NT_WORKSTATION
		     && sysinfo.wProcessorArchitecture!=PROCESSOR_ARCHITECTURE_AMD64)
		{
			if( versioninfo.dwMajorVersion == 4 )
				osproduct = "Workstation 4.0";
			else if( versioninfo.wSuiteMask & VER_SUITE_PERSONAL )
				osproduct = "Home Edition";
			else
				osproduct = "Professional";
		}
		/* Server type */
		else if ( versioninfo.wProductType == VER_NT_SERVER
		          || versioninfo.wProductType == VER_NT_DOMAIN_CONTROLLER )
		{
			if (versioninfo.dwMajorVersion == 5 && versioninfo.dwMinorVersion == 2) {
				if ( sysinfo.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_IA64 ) {
					if( versioninfo.wSuiteMask & VER_SUITE_DATACENTER )
						osproduct = "Datacenter Edition for Itanium-based Systems";
					else if( versioninfo.wSuiteMask & VER_SUITE_ENTERPRISE )
						osproduct = "Enterprise Edition for Itanium-based Systems";
				}
				else if ( sysinfo.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64 ) {
					if ( versioninfo.wSuiteMask & VER_SUITE_DATACENTER )
						osproduct = "Datacenter x64 Edition";
					else if ( versioninfo.wSuiteMask & VER_SUITE_ENTERPRISE )
						osproduct = "Enterprise x64 Edition";
					else
						osproduct = "Standard x64 Edition";
				}
				else {
					if ( versioninfo.wSuiteMask & VER_SUITE_DATACENTER )
						osproduct = "Datacenter Edition";
					else if ( versioninfo.wSuiteMask & VER_SUITE_ENTERPRISE )
						osproduct = "Enterprise Edition";
					else if ( versioninfo.wSuiteMask & VER_SUITE_BLADE )
						osproduct = "Web Edition";
					else
						osproduct = "Standard Edition";
				}
			}
			else if ( versioninfo.dwMajorVersion == 5 && versioninfo.dwMinorVersion == 0) {
				if ( versioninfo.wSuiteMask & VER_SUITE_DATACENTER )
					osproduct = "Datacenter Server";
				else if ( versioninfo.wSuiteMask & VER_SUITE_ENTERPRISE )
					osproduct = "Advanced Server";
				else
					osproduct = "Server";
			}
			else { /* NT 4.0 */
				if ( versioninfo.wSuiteMask & VER_SUITE_ENTERPRISE )
					osproduct = "Server 4.0, Enterprise Edition";
				else
					osproduct = "Server 4.0";
			}
		} /* \server type */
	} /* \product */

	if (0==kde_gethostname(tmpnodename, tmpnodenamelen))
		strncpy(name->nodename, tmpnodename, 19);
	else
		name->nodename[0]=0;

	strncpy(name->version, __DATE__, 19); /** @todo ok? */

	if (osproduct)
		sprintf(name->release, "%d.%d (%s %s)", versioninfo.dwMajorVersion, 
			versioninfo.dwMinorVersion, ostype, osproduct);
	else if (ostype)
		sprintf(name->release, "%d.%d (%s)", versioninfo.dwMajorVersion, 
			versioninfo.dwMinorVersion, ostype);
	else
		sprintf(name->release, "%d.%d", versioninfo.dwMajorVersion, 
			versioninfo.dwMinorVersion);

	return 0;
}