/*
  ==============================================================================

   This file is part of the JUCE framework.
   Copyright (c) Raw Material Software Limited

   JUCE is an open source framework subject to commercial or open source
   licensing.

   By downloading, installing, or using the JUCE framework, or combining the
   JUCE framework with any other source code, object code, content or any other
   copyrightable work, you agree to the terms of the JUCE End User Licence
   Agreement, and all incorporated terms including the JUCE Privacy Policy and
   the JUCE Website Terms of Service, as applicable, which will bind you. If you
   do not agree to the terms of these agreements, we will not license the JUCE
   framework to you, and you must discontinue the installation or download
   process and cease use of the JUCE framework.

   JUCE End User Licence Agreement: https://juce.com/legal/juce-8-licence/
   JUCE Privacy Policy: https://juce.com/juce-privacy-policy
   JUCE Website Terms of Service: https://juce.com/juce-website-terms-of-service/

   Or:

   You may also use this code under the terms of the AGPLv3:
   https://www.gnu.org/licenses/agpl-3.0.en.html

   THE JUCE FRAMEWORK IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL
   WARRANTIES, WHETHER EXPRESSED OR IMPLIED, INCLUDING WARRANTY OF
   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, ARE DISCLAIMED.

  ==============================================================================
*/

namespace juce
{

String SystemStats::getJUCEVersion()
{
    // Some basic tests, to keep an eye on things and make sure these types work ok
    // on all platforms. Let me know if any of these assertions fail on your system!
    static_assert (sizeof (pointer_sized_int) == sizeof (void*), "Basic sanity test failed: please report!");
    static_assert (sizeof (int8) == 1,                           "Basic sanity test failed: please report!");
    static_assert (sizeof (uint8) == 1,                          "Basic sanity test failed: please report!");
    static_assert (sizeof (int16) == 2,                          "Basic sanity test failed: please report!");
    static_assert (sizeof (uint16) == 2,                         "Basic sanity test failed: please report!");
    static_assert (sizeof (int32) == 4,                          "Basic sanity test failed: please report!");
    static_assert (sizeof (uint32) == 4,                         "Basic sanity test failed: please report!");
    static_assert (sizeof (int64) == 8,                          "Basic sanity test failed: please report!");
    static_assert (sizeof (uint64) == 8,                         "Basic sanity test failed: please report!");

    return "JUCE v" JUCE_STRINGIFY (JUCE_MAJOR_VERSION)
                "." JUCE_STRINGIFY (JUCE_MINOR_VERSION)
                "." JUCE_STRINGIFY (JUCE_BUILDNUMBER);
}

#if JUCE_ANDROID && ! defined (JUCE_DISABLE_JUCE_VERSION_PRINTING)
 #define JUCE_DISABLE_JUCE_VERSION_PRINTING 1
#endif

#if JUCE_DEBUG && ! JUCE_DISABLE_JUCE_VERSION_PRINTING
 struct JuceVersionPrinter
 {
     JuceVersionPrinter()
     {
         DBG (SystemStats::getJUCEVersion());
     }
 };

 static JuceVersionPrinter juceVersionPrinter;
#endif

StringArray SystemStats::getDeviceIdentifiers()
{
    for (const auto flag : { MachineIdFlags::fileSystemId, MachineIdFlags::macAddresses  })
        if (auto ids = getMachineIdentifiers (flag); ! ids.isEmpty())
            return ids;

    jassertfalse; // Failed to create any IDs!
    return {};
}

String getLegacyUniqueDeviceID();

StringArray SystemStats::getMachineIdentifiers (MachineIdFlags flags)
{
    auto macAddressProvider = [] (StringArray& arr)
    {
        for (const auto& mac : MACAddress::getAllAddresses())
            arr.add (mac.toString());
    };

    auto fileSystemProvider = [] (StringArray& arr)
    {
       #if JUCE_WINDOWS
        File f (File::getSpecialLocation (File::windowsSystemDirectory));
       #else
        File f ("~");
       #endif
        if (auto num = f.getFileIdentifier())
            arr.add (String::toHexString ((int64) num));
    };

    auto legacyIdProvider = [] ([[maybe_unused]] StringArray& arr)
    {
       #if JUCE_WINDOWS
        arr.add (getLegacyUniqueDeviceID());
       #endif
    };

    auto uniqueIdProvider = [] (StringArray& arr)
    {
        arr.add (getUniqueDeviceID());
    };

    struct Provider { MachineIdFlags flag; void (*func) (StringArray&); };
    static const Provider providers[] =
    {
        { MachineIdFlags::macAddresses,   macAddressProvider },
        { MachineIdFlags::fileSystemId,   fileSystemProvider },
        { MachineIdFlags::legacyUniqueId, legacyIdProvider },
        { MachineIdFlags::uniqueId,       uniqueIdProvider }
    };

    StringArray ids;

    for (const auto& provider : providers)
    {
        if (hasBitValueSet (flags, provider.flag))
            provider.func (ids);
    }

    return ids;
}

//==============================================================================
struct CPUInformation
{
    CPUInformation() noexcept    { initialise(); }

    void initialise() noexcept;

    int numLogicalCPUs = 0, numPhysicalCPUs = 0;

    bool hasMMX      = false, hasSSE        = false, hasSSE2       = false, hasSSE3       = false,
         has3DNow    = false, hasFMA3       = false, hasFMA4       = false, hasSSSE3      = false,
         hasSSE41    = false, hasSSE42      = false, hasAVX        = false, hasAVX2       = false,
         hasAVX512F  = false, hasAVX512BW   = false, hasAVX512CD   = false,
         hasAVX512DQ = false, hasAVX512ER   = false, hasAVX512IFMA = false,
         hasAVX512PF = false, hasAVX512VBMI = false, hasAVX512VL   = false,
         hasAVX512VPOPCNTDQ = false,
         hasNeon = false;
};

static const CPUInformation& getCPUInformation() noexcept
{
    static CPUInformation info;
    return info;
}

int SystemStats::getNumCpus() noexcept          { return getCPUInformation().numLogicalCPUs; }
int SystemStats::getNumPhysicalCpus() noexcept  { return getCPUInformation().numPhysicalCPUs; }
bool SystemStats::hasMMX() noexcept             { return getCPUInformation().hasMMX; }
bool SystemStats::has3DNow() noexcept           { return getCPUInformation().has3DNow; }
bool SystemStats::hasFMA3() noexcept            { return getCPUInformation().hasFMA3; }
bool SystemStats::hasFMA4() noexcept            { return getCPUInformation().hasFMA4; }
bool SystemStats::hasSSE() noexcept             { return getCPUInformation().hasSSE; }
bool SystemStats::hasSSE2() noexcept            { return getCPUInformation().hasSSE2; }
bool SystemStats::hasSSE3() noexcept            { return getCPUInformation().hasSSE3; }
bool SystemStats::hasSSSE3() noexcept           { return getCPUInformation().hasSSSE3; }
bool SystemStats::hasSSE41() noexcept           { return getCPUInformation().hasSSE41; }
bool SystemStats::hasSSE42() noexcept           { return getCPUInformation().hasSSE42; }
bool SystemStats::hasAVX() noexcept             { return getCPUInformation().hasAVX; }
bool SystemStats::hasAVX2() noexcept            { return getCPUInformation().hasAVX2; }
bool SystemStats::hasAVX512F() noexcept         { return getCPUInformation().hasAVX512F; }
bool SystemStats::hasAVX512BW() noexcept        { return getCPUInformation().hasAVX512BW; }
bool SystemStats::hasAVX512CD() noexcept        { return getCPUInformation().hasAVX512CD; }
bool SystemStats::hasAVX512DQ() noexcept        { return getCPUInformation().hasAVX512DQ; }
bool SystemStats::hasAVX512ER() noexcept        { return getCPUInformation().hasAVX512ER; }
bool SystemStats::hasAVX512IFMA() noexcept      { return getCPUInformation().hasAVX512IFMA; }
bool SystemStats::hasAVX512PF() noexcept        { return getCPUInformation().hasAVX512PF; }
bool SystemStats::hasAVX512VBMI() noexcept      { return getCPUInformation().hasAVX512VBMI; }
bool SystemStats::hasAVX512VL() noexcept        { return getCPUInformation().hasAVX512VL; }
bool SystemStats::hasAVX512VPOPCNTDQ() noexcept { return getCPUInformation().hasAVX512VPOPCNTDQ; }
bool SystemStats::hasNeon() noexcept            { return getCPUInformation().hasNeon; }


//==============================================================================
String SystemStats::getStackBacktrace()
{
    String result;

   #if JUCE_ANDROID || JUCE_WASM
    jassertfalse; // sorry, not implemented yet!

   #elif JUCE_WINDOWS
    HANDLE process = GetCurrentProcess();
    SymInitialize (process, nullptr, TRUE);

    void* stack[128];
    int frames = (int) CaptureStackBackTrace (0, numElementsInArray (stack), stack, nullptr);

    HeapBlock<SYMBOL_INFO> symbol;
    symbol.calloc (sizeof (SYMBOL_INFO) + 256, 1);
    symbol->MaxNameLen = 255;
    symbol->SizeOfStruct = sizeof (SYMBOL_INFO);

    for (int i = 0; i < frames; ++i)
    {
        DWORD64 displacement = 0;

        if (SymFromAddr (process, (DWORD64) stack[i], &displacement, symbol))
        {
            result << i << ": ";

            IMAGEHLP_MODULE64 moduleInfo;
            zerostruct (moduleInfo);
            moduleInfo.SizeOfStruct = sizeof (moduleInfo);

            if (::SymGetModuleInfo64 (process, symbol->ModBase, &moduleInfo))
                result << moduleInfo.ModuleName << ": ";

            result << symbol->Name << " + 0x" << String::toHexString ((int64) displacement) << newLine;
        }
    }

   #else
    void* stack[128];
    auto frames = backtrace (stack, numElementsInArray (stack));
    char** frameStrings = backtrace_symbols (stack, frames);

    for (auto i = (decltype (frames)) 0; i < frames; ++i)
        result << frameStrings[i] << newLine;

    ::free (frameStrings);
   #endif

    return result;
}

//==============================================================================
#if ! JUCE_WASM

static SystemStats::CrashHandlerFunction globalCrashHandler = nullptr;

#if JUCE_WINDOWS
static LONG WINAPI handleCrash (LPEXCEPTION_POINTERS ep)
{
    globalCrashHandler (ep);
    return EXCEPTION_EXECUTE_HANDLER;
}
#else
static void handleCrash (int signum)
{
    globalCrashHandler ((void*) (pointer_sized_int) signum);
    ::kill (getpid(), SIGKILL);
}
#endif

void SystemStats::setApplicationCrashHandler (CrashHandlerFunction handler)
{
    jassert (handler != nullptr); // This must be a valid function.
    globalCrashHandler = handler;

   #if JUCE_WINDOWS
    SetUnhandledExceptionFilter (handleCrash);
   #else
    const int signals[] = { SIGFPE, SIGILL, SIGSEGV, SIGBUS, SIGABRT, SIGSYS };

    for (int i = 0; i < numElementsInArray (signals); ++i)
    {
        ::signal (signals[i], handleCrash);
        juce_siginterrupt (signals[i], 1);
    }
   #endif
}

#endif

bool SystemStats::isRunningInAppExtensionSandbox() noexcept
{
   #if JUCE_MAC || JUCE_IOS
    static bool isRunningInAppSandbox = [&]
    {
        File bundle = File::getSpecialLocation (File::invokedExecutableFile).getParentDirectory();

       #if JUCE_MAC
        bundle = bundle.getParentDirectory().getParentDirectory();
       #endif

        if (bundle.isDirectory())
            return bundle.getFileExtension() == ".appex";

        return false;
    }();

    return isRunningInAppSandbox;
   #else
    return false;
   #endif
}

#if JUCE_UNIT_TESTS

class UniqueHardwareIDTest final : public UnitTest
{
public:
    //==============================================================================
    UniqueHardwareIDTest() : UnitTest ("UniqueHardwareID", UnitTestCategories::analytics) {}

    void runTest() override
    {
        beginTest ("getUniqueDeviceID returns usable data.");
        {
            expect (SystemStats::getUniqueDeviceID().isNotEmpty());
        }
    }
};

static UniqueHardwareIDTest uniqueHardwareIDTest;

#endif

} // namespace juce