////////////////////////////////////////////////////////////////////////////////
//
// File   : gearos.cpp - GEAR os detection
//          Copyright (c) Ubisoft Entertainment. All rights reserved.
//
////////////////////////////////////////////////////////////////////////////////

#include "gearos.h"
#include "gearhardware.h"
#include "systeminc.h"

namespace G4 {

    namespace SystemDetection
    {
        GearOS::GearOS()
        {
            FillInformation();
        }

        void GearOS::FillInformation()
        {
            windowsVersion = OS::WINDOWSVERSION_UNKNOWN;
            supports64Bits = false;
            isoRegionName[0] = '\0';
            servicePack = 0;

            // http://msdn.microsoft.com/en-us/library/ms724833(VS.85).aspx
            OSVERSIONINFOEX info;
            info.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEX);
            if (GetVersionEx((OSVERSIONINFO*) &info))
            {
                if (info.dwMajorVersion == 6)
                {
                    if (info.wProductType == VER_NT_WORKSTATION)
                    {
                        if (info.dwMinorVersion == 0)
                            windowsVersion = OS::WINDOWSVERSION_VISTA;
                        else if (info.dwMinorVersion == 1)
                            windowsVersion = OS::WINDOWSVERSION_SEVEN;
                        else if (info.dwMinorVersion == 2)
                            windowsVersion = OS::WINDOWSVERSION_8;
                    }
                    else
                    {
                        if (info.dwMinorVersion == 0)
                            windowsVersion = OS::WINDOWSVERSION_SERVER_2008;
                        else if (info.dwMinorVersion == 1)
                            windowsVersion = OS::WINDOWSVERSION_SERVER_2008_R2;
                        else if (info.dwMinorVersion == 2)
                            windowsVersion = OS::WINDOWSVERSION_SERVER_2012;
                    }
                }
                else if(info.dwMajorVersion == 5)
                {
                    if (info.dwMinorVersion == 2)
                    {
                        SYSTEM_INFO sysinfo;
                        GetSystemInfo(&sysinfo);

                        if((info.wProductType == VER_NT_WORKSTATION))
                            windowsVersion = OS::WINDOWSVERSION_XP;
                        else if(GetSystemMetrics(SM_SERVERR2) == 0)
                            windowsVersion = OS::WINDOWSVERSION_SERVER_2003;
                    }
                    else if (info.dwMinorVersion == 1)
                        windowsVersion = OS::WINDOWSVERSION_XP;
                    else if (info.dwMinorVersion == 0)
                        windowsVersion = OS::WINDOWSVERSION_2000;
                }

                servicePack = (unsigned long) info.wServicePackMajor;
            }
            else
            {
                G4_INTERNAL_LOG_ERROR(SystemDetection::Hardware, "Failed to get windows version.\n");
            }

            // Check for Operating system bits (32/64)
            #if defined(_WIN64)
                supports64Bits = true;  // 64-bit programs run only on Win64
            #elif defined(_WIN32)
                // 32-bit programs run on both 32-bit and 64-bit Windows
                BOOL f64 = FALSE;
                supports64Bits = IsWow64Process(GetCurrentProcess(), &f64) && f64;
            #endif

            // Get the locale info            
            LCID id = GetUserDefaultLCID();
            GetLocaleInfoA(id, LOCALE_SISO3166CTRYNAME, isoRegionName, sizeof(isoRegionName));
        }
    }
} // namespace G4()