#include "VersionInfo.h"

#if __linux__
#define OS_PLATFORM_LINUX
#elif TARGET_OS_MAC
#define OS_PLATFORM_MAC
#elif defined _WIN32 || defined _WIN64
#define OS_PLATFORM_WINDOWS
#include <Windows.h>
#include <sstream>
#endif

std::string VersionInfo::GetVersionInfo()
{
#if defined(OS_PLATFORM_LINUX)
	return std::string("Linux");
#elif defined(TARGET_OS_MAC)
	return std::string("Mac OS X");
#elif defined (OS_PLATFORM_WINDOWS)
	OSVERSIONINFO osv = { sizeof(osv), 0 };
	if( GetVersionEx( &osv ) ) {
		if( 5 == osv.dwMajorVersion ) {
			switch( osv.dwMinorVersion ) {
			case 0:
				return "Windows 2000";
			case 1:
				return "Windows XP";
			case 2:
				return "Windows XPx64";
			default:
				break;
			}
		} else if( 6 == osv.dwMajorVersion ) {
			switch( osv.dwMinorVersion ) {
			case 0:
				return "Windows Vista";
			case 1:
				return "Windows 7";
			case 2:
				return "Windows 8";
			case 3:
				return "Windows 8.1";
			default:
				break;
			}
		}
		std::stringstream ss;
		ss << "Windows " << osv.dwMajorVersion << "." << osv.dwMinorVersion;
		return ss.str();
	}
	return "Windows ??";
#else
	return std::string("Unknown OS");
#endif
}