/***
    Copyright (C) 2022 J Reece Wilson (a/k/a "Reece"). All rights reserved.

    File: AuVersionHelpers.cpp
    Date: 2022-1-25
    Author: Reece
***/
#include <Source/RuntimeInternal.hpp>
#include "AuSWInfo.hpp" 
// NO HEADER (note -> .hpp wouldn't clash with windows' sdk)

namespace Aurora::SWInfo
{
    static AuUInt16 kWinVerNT4 = 0x0400;
    static AuUInt16 kWinVerWin2K = 0x0500;
    static AuUInt16 kWinVerWinXP = 0x0501;
    static AuUInt16 kWinVerWS03 = 0x0502;
    static AuUInt16 kWinVerWin6 = 0x0600;
    static AuUInt16 kWinVerVista = 0x0600;
    static AuUInt16 kWinVerWS08 = 0x0600;
    static AuUInt16 kWinVerWin7 = 0x0601;
    static AuUInt16 kWinVerWin8 = 0x0602;
    static AuUInt16 kWinVerWinBlue = 0x0603;
    static AuUInt16 kWinVerWin10 = 0x0A00;
    static AuUInt16 kKernPatchWin11 = 22000;

    static bool IsWindowsVersionOrGreater(AuUInt8 major, AuUInt8 minor, AuUInt16 sp)
    {
        auto &info = GetPlatformInfo();
        return info.ePlatform == Build::EPlatform::ePlatformWin32 &&
            (info.uKernelMajor > major || (info.uKernelMajor == major && info.uKernelMinor >= minor)) &&
            ((info.uKernelMajor == major && info.uKernelMinor == minor) ? info.uUserlandMinor >= sp : true);
    }

    AUKN_SYM bool IsWindowsXPOrGreater()
    {
        return IsWindowsVersionOrGreater(AuBitsToHigher(kWinVerWinXP), AuBitsToLower(kWinVerWinXP), 0);
    }

    AUKN_SYM bool IsWindowsXPSP1OrGreater()
    {
        return IsWindowsVersionOrGreater(AuBitsToHigher(kWinVerWinXP), AuBitsToLower(kWinVerWinXP), 1);
    }

    AUKN_SYM bool IsWindowsXPSP2OrGreater()
    {
        return IsWindowsVersionOrGreater(AuBitsToHigher(kWinVerWinXP), AuBitsToLower(kWinVerWinXP), 2);
    }

    AUKN_SYM bool IsWindowsXPSP3OrGreater()
    {
        return IsWindowsVersionOrGreater(AuBitsToHigher(kWinVerWinXP), AuBitsToLower(kWinVerWinXP), 3);
    }

    AUKN_SYM bool IsWindowsVistaOrGreater()
    {
        return IsWindowsVersionOrGreater(AuBitsToHigher(kWinVerVista), AuBitsToLower(kWinVerVista), 0);
    }

    AUKN_SYM bool IsWindowsVistaSP1OrGreater()
    {
        return IsWindowsVersionOrGreater(AuBitsToHigher(kWinVerVista), AuBitsToLower(kWinVerVista), 1);
    }

    AUKN_SYM bool IsWindowsVistaSP2OrGreater()
    {
        return IsWindowsVersionOrGreater(AuBitsToHigher(kWinVerVista), AuBitsToLower(kWinVerVista), 2);
    }

    AUKN_SYM bool IsWindows7OrGreater()
    {
        return IsWindowsVersionOrGreater(AuBitsToHigher(kWinVerWin7), AuBitsToLower(kWinVerWin7), 0);
    }

    AUKN_SYM bool IsWindows7SP1OrGreater()
    {
        return IsWindowsVersionOrGreater(AuBitsToHigher(kWinVerWin7), AuBitsToLower(kWinVerWin7), 1);
    }

    AUKN_SYM bool IsWindows8OrGreater()
    {
        return IsWindowsVersionOrGreater(AuBitsToHigher(kWinVerWin8), AuBitsToLower(kWinVerWin8), 0);
    }

    AUKN_SYM bool IsWindows8Point1OrGreater()
    {
        return IsWindowsVersionOrGreater(AuBitsToHigher(kWinVerWinBlue), AuBitsToLower(kWinVerWinBlue), 0);
    }

    AUKN_SYM bool IsWindows10OrGreater()
    {
        return IsWindowsVersionOrGreater(AuBitsToHigher(kWinVerWin10), AuBitsToLower(kWinVerWin10), 0);
    }

    AUKN_SYM bool IsWindows11OrGreater()
    {
        auto &info = GetPlatformInfo();
        return IsWindowsVersionOrGreater(AuBitsToHigher(kWinVerWin10), AuBitsToLower(kWinVerWin10), 0) && 
            (info.uKernelPatch >= kKernPatchWin11 || info.uKernelMajor > AuBitsToHigher(kWinVerWin10));
    }

#define ADD_ABS_CHECK(A, B)                                                     \
    AUKN_SYM bool IsWindows ## A()                                              \
    {                                                                           \
        return IsWindows ## A ## OrGreater() && !IsWindows ## B ## OrGreater(); \
    }

    ADD_ABS_CHECK(XP, XPSP1)
    ADD_ABS_CHECK(XPSP1, XPSP2)
    ADD_ABS_CHECK(XPSP2, XPSP3)
    ADD_ABS_CHECK(XPSP3, Vista)
    ADD_ABS_CHECK(Vista, VistaSP1)
    ADD_ABS_CHECK(VistaSP1, VistaSP2)
    ADD_ABS_CHECK(VistaSP2, 7)
    ADD_ABS_CHECK(7, 7SP1)
    ADD_ABS_CHECK(7SP1, 8)
    ADD_ABS_CHECK(8, 8Point1)
    ADD_ABS_CHECK(8Point1, 10)
    ADD_ABS_CHECK(10, 11)
    
    AUKN_SYM bool IsWindows11()
    {
        return IsWindows11OrGreater();
    }

    AUKN_SYM bool IsWindowsXPAny()
    {
        return IsWindowsXPOrGreater() && !IsWindowsVistaOrGreater();
    }

    AUKN_SYM bool IsWindowsVistaAny()
    {
        return IsWindowsVistaOrGreater() && !IsWindows7OrGreater();
    }

    AUKN_SYM bool IsWindows7Any()
    {
        return IsWindows7OrGreater() && !IsWindows8OrGreater();
    }

    AUKN_SYM bool IsWindows8Any()
    {
        return IsWindows8OrGreater() && !IsWindows10OrGreater();
    }
}