/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "mozilla/ArrayUtils.h"

#include "nsSystemInfo.h"
#include "prsystem.h"
#include "prio.h"
#include "prprf.h"
#include "mozilla/SSE.h"
#include "mozilla/arm.h"

#ifdef XP_WIN
#include <windows.h>
#include <winioctl.h>
#include "base/scoped_handle_win.h"
#include "nsAppDirectoryServiceDefs.h"
#include "nsDirectoryServiceDefs.h"
#include "nsDirectoryServiceUtils.h"
#include "nsIObserverService.h"
#endif

#ifdef MOZ_WIDGET_GTK
#include <gtk/gtk.h>
#endif

#ifdef MOZ_WIDGET_ANDROID
#include "AndroidBridge.h"
using namespace mozilla::widget::android;
#endif

#ifdef MOZ_WIDGET_GONK
#include <sys/system_properties.h>
#include "mozilla/Preferences.h"
#include "nsPrintfCString.h"
#endif

#ifdef ANDROID
extern "C" {
NS_EXPORT int android_sdk_version;
}
#endif

#if defined(XP_LINUX) && defined(MOZ_SANDBOX)
#include "mozilla/SandboxInfo.h"
#endif

// Slot for NS_InitXPCOM2 to pass information to nsSystemInfo::Init.
// Only set to nonzero (potentially) if XP_UNIX.  On such systems, the
// system call to discover the appropriate value is not thread-safe,
// so we must call it before going multithreaded, but nsSystemInfo::Init
// only happens well after that point.
uint32_t nsSystemInfo::gUserUmask = 0;

#if defined(XP_WIN)
namespace {
nsresult
GetHDDInfo(const char* aSpecialDirName, nsAutoCString& aModel,
           nsAutoCString& aRevision)
{
  aModel.Truncate();
  aRevision.Truncate();

  nsCOMPtr<nsIFile> profDir;
  nsresult rv = NS_GetSpecialDirectory(aSpecialDirName,
                                       getter_AddRefs(profDir));
  NS_ENSURE_SUCCESS(rv, rv);
  nsAutoString profDirPath;
  rv = profDir->GetPath(profDirPath);
  NS_ENSURE_SUCCESS(rv, rv);
  wchar_t volumeMountPoint[MAX_PATH] = {L'\\', L'\\', L'.', L'\\'};
  const size_t PREFIX_LEN = 4;
  if (!::GetVolumePathNameW(profDirPath.get(), volumeMountPoint + PREFIX_LEN,
                            mozilla::ArrayLength(volumeMountPoint) -
                            PREFIX_LEN)) {
    return NS_ERROR_UNEXPECTED;
  }
  size_t volumeMountPointLen = wcslen(volumeMountPoint);
  // Since we would like to open a drive and not a directory, we need to
  // remove any trailing backslash. A drive handle is valid for
  // DeviceIoControl calls, a directory handle is not.
  if (volumeMountPoint[volumeMountPointLen - 1] == L'\\') {
    volumeMountPoint[volumeMountPointLen - 1] = L'\0';
  }
  ScopedHandle handle(::CreateFileW(volumeMountPoint, 0,
                                    FILE_SHARE_READ | FILE_SHARE_WRITE,
                                    nullptr, OPEN_EXISTING, 0, nullptr));
  if (!handle.IsValid()) {
    return NS_ERROR_UNEXPECTED;
  }
  STORAGE_PROPERTY_QUERY queryParameters = {
    StorageDeviceProperty, PropertyStandardQuery
  };
  STORAGE_DEVICE_DESCRIPTOR outputHeader = {sizeof(STORAGE_DEVICE_DESCRIPTOR)};
  DWORD bytesRead = 0;
  if (!::DeviceIoControl(handle, IOCTL_STORAGE_QUERY_PROPERTY,
                         &queryParameters, sizeof(queryParameters),
                         &outputHeader, sizeof(outputHeader), &bytesRead,
                         nullptr)) {
    return NS_ERROR_FAILURE;
  }
  PSTORAGE_DEVICE_DESCRIPTOR deviceOutput =
    (PSTORAGE_DEVICE_DESCRIPTOR)malloc(outputHeader.Size);
  if (!::DeviceIoControl(handle, IOCTL_STORAGE_QUERY_PROPERTY,
                         &queryParameters, sizeof(queryParameters),
                         deviceOutput, outputHeader.Size, &bytesRead,
                         nullptr)) {
    free(deviceOutput);
    return NS_ERROR_FAILURE;
  }
  // Some HDDs are including product ID info in the vendor field. Since PNP
  // IDs include vendor info and product ID concatenated together, we'll do
  // that here and interpret the result as a unique ID for the HDD model.
  if (deviceOutput->VendorIdOffset) {
    aModel = reinterpret_cast<char*>(deviceOutput) +
      deviceOutput->VendorIdOffset;
  }
  if (deviceOutput->ProductIdOffset) {
    aModel += reinterpret_cast<char*>(deviceOutput) +
      deviceOutput->ProductIdOffset;
  }
  aModel.CompressWhitespace();
  if (deviceOutput->ProductRevisionOffset) {
    aRevision = reinterpret_cast<char*>(deviceOutput) +
      deviceOutput->ProductRevisionOffset;
    aRevision.CompressWhitespace();
  }
  free(deviceOutput);
  return NS_OK;
}
} // anonymous namespace
#endif // defined(XP_WIN)

using namespace mozilla;

nsSystemInfo::nsSystemInfo()
{
}

nsSystemInfo::~nsSystemInfo()
{
}

// CPU-specific information.
static const struct PropItems
{
  const char* name;
  bool (*propfun)(void);
} cpuPropItems[] = {
  // x86-specific bits.
  { "hasMMX", mozilla::supports_mmx },
  { "hasSSE", mozilla::supports_sse },
  { "hasSSE2", mozilla::supports_sse2 },
  { "hasSSE3", mozilla::supports_sse3 },
  { "hasSSSE3", mozilla::supports_ssse3 },
  { "hasSSE4A", mozilla::supports_sse4a },
  { "hasSSE4_1", mozilla::supports_sse4_1 },
  { "hasSSE4_2", mozilla::supports_sse4_2 },
  // ARM-specific bits.
  { "hasEDSP", mozilla::supports_edsp },
  { "hasARMv6", mozilla::supports_armv6 },
  { "hasARMv7", mozilla::supports_armv7 },
  { "hasNEON", mozilla::supports_neon }
};

nsresult
nsSystemInfo::Init()
{
  nsresult rv;

  static const struct
  {
    PRSysInfo cmd;
    const char* name;
  } items[] = {
    { PR_SI_SYSNAME, "name" },
    { PR_SI_HOSTNAME, "host" },
    { PR_SI_ARCHITECTURE, "arch" },
    { PR_SI_RELEASE, "version" }
  };

  for (uint32_t i = 0; i < (sizeof(items) / sizeof(items[0])); i++) {
    char buf[SYS_INFO_BUFFER_LENGTH];
    if (PR_GetSystemInfo(items[i].cmd, buf, sizeof(buf)) == PR_SUCCESS) {
      rv = SetPropertyAsACString(NS_ConvertASCIItoUTF16(items[i].name),
                                 nsDependentCString(buf));
      if (NS_WARN_IF(NS_FAILED(rv))) {
        return rv;
      }
    } else {
      NS_WARNING("PR_GetSystemInfo failed");
    }
  }

#if defined(XP_WIN) && defined(MOZ_METRO)
  // Create "hasWindowsTouchInterface" property.
  nsAutoString version;
  rv = GetPropertyAsAString(NS_LITERAL_STRING("version"), version);
  NS_ENSURE_SUCCESS(rv, rv);
  double versionDouble = version.ToDouble(&rv);
  NS_ENSURE_SUCCESS(rv, rv);

  rv = SetPropertyAsBool(NS_ConvertASCIItoUTF16("hasWindowsTouchInterface"),
                         versionDouble >= 6.2);
  NS_ENSURE_SUCCESS(rv, rv);
#else
  rv = SetPropertyAsBool(NS_ConvertASCIItoUTF16("hasWindowsTouchInterface"),
                         false);
  NS_ENSURE_SUCCESS(rv, rv);
#endif

  // Additional informations not available through PR_GetSystemInfo.
  SetInt32Property(NS_LITERAL_STRING("pagesize"), PR_GetPageSize());
  SetInt32Property(NS_LITERAL_STRING("pageshift"), PR_GetPageShift());
  SetInt32Property(NS_LITERAL_STRING("memmapalign"), PR_GetMemMapAlignment());
  SetInt32Property(NS_LITERAL_STRING("cpucount"), PR_GetNumberOfProcessors());
  SetUint64Property(NS_LITERAL_STRING("memsize"), PR_GetPhysicalMemorySize());
  SetUint32Property(NS_LITERAL_STRING("umask"), nsSystemInfo::gUserUmask);

  for (uint32_t i = 0; i < ArrayLength(cpuPropItems); i++) {
    rv = SetPropertyAsBool(NS_ConvertASCIItoUTF16(cpuPropItems[i].name),
                           cpuPropItems[i].propfun());
    if (NS_WARN_IF(NS_FAILED(rv))) {
      return rv;
    }
  }

#ifdef XP_WIN
  BOOL isWow64;
  BOOL gotWow64Value = IsWow64Process(GetCurrentProcess(), &isWow64);
  NS_WARN_IF_FALSE(gotWow64Value, "IsWow64Process failed");
  if (gotWow64Value) {
    rv = SetPropertyAsBool(NS_LITERAL_STRING("isWow64"), !!isWow64);
    if (NS_WARN_IF(NS_FAILED(rv))) {
      return rv;
    }
  }
  if (NS_FAILED(GetProfileHDDInfo())) {
    // We might have been called before profile-do-change. We'll observe that
    // event so that we can fill this in later.
    nsCOMPtr<nsIObserverService> obsService =
      do_GetService(NS_OBSERVERSERVICE_CONTRACTID, &rv);
    if (NS_WARN_IF(NS_FAILED(rv))) {
      return rv;
    }
    rv = obsService->AddObserver(this, "profile-do-change", false);
    if (NS_FAILED(rv)) {
      return rv;
    }
  }
  nsAutoCString hddModel, hddRevision;
  if (NS_SUCCEEDED(GetHDDInfo(NS_GRE_DIR, hddModel, hddRevision))) {
    rv = SetPropertyAsACString(NS_LITERAL_STRING("binHDDModel"), hddModel);
    NS_ENSURE_SUCCESS(rv, rv);
    rv = SetPropertyAsACString(NS_LITERAL_STRING("binHDDRevision"),
                               hddRevision);
    NS_ENSURE_SUCCESS(rv, rv);
  }
  if (NS_SUCCEEDED(GetHDDInfo(NS_WIN_WINDOWS_DIR, hddModel, hddRevision))) {
    rv = SetPropertyAsACString(NS_LITERAL_STRING("winHDDModel"), hddModel);
    NS_ENSURE_SUCCESS(rv, rv);
    rv = SetPropertyAsACString(NS_LITERAL_STRING("winHDDRevision"),
                               hddRevision);
    NS_ENSURE_SUCCESS(rv, rv);
  }
#endif

#if defined(MOZ_WIDGET_GTK)
  // This must be done here because NSPR can only separate OS's when compiled, not libraries.
  char* gtkver = PR_smprintf("GTK %u.%u.%u", gtk_major_version,
                             gtk_minor_version, gtk_micro_version);
  if (gtkver) {
    rv = SetPropertyAsACString(NS_LITERAL_STRING("secondaryLibrary"),
                               nsDependentCString(gtkver));
    PR_smprintf_free(gtkver);
    if (NS_WARN_IF(NS_FAILED(rv))) {
      return rv;
    }
  }
#endif

#ifdef MOZ_WIDGET_ANDROID
  if (mozilla::AndroidBridge::Bridge()) {
    nsAutoString str;
    if (mozilla::AndroidBridge::Bridge()->GetStaticStringField(
          "android/os/Build", "MODEL", str)) {
      SetPropertyAsAString(NS_LITERAL_STRING("device"), str);
    }
    if (mozilla::AndroidBridge::Bridge()->GetStaticStringField(
          "android/os/Build", "MANUFACTURER", str)) {
      SetPropertyAsAString(NS_LITERAL_STRING("manufacturer"), str);
    }
    if (mozilla::AndroidBridge::Bridge()->GetStaticStringField(
          "android/os/Build$VERSION", "RELEASE", str)) {
      SetPropertyAsAString(NS_LITERAL_STRING("release_version"), str);
    }
    int32_t version;
    if (!mozilla::AndroidBridge::Bridge()->GetStaticIntField(
          "android/os/Build$VERSION", "SDK_INT", &version)) {
      version = 0;
    }
    android_sdk_version = version;
    if (version >= 8 &&
        mozilla::AndroidBridge::Bridge()->GetStaticStringField(
          "android/os/Build", "HARDWARE", str)) {
      SetPropertyAsAString(NS_LITERAL_STRING("hardware"), str);
    }
    bool isTablet = mozilla::widget::android::GeckoAppShell::IsTablet();
    SetPropertyAsBool(NS_LITERAL_STRING("tablet"), isTablet);
    // NSPR "version" is the kernel version. For Android we want the Android version.
    // Rename SDK version to version and put the kernel version into kernel_version.
    rv = GetPropertyAsAString(NS_LITERAL_STRING("version"), str);
    if (NS_SUCCEEDED(rv)) {
      SetPropertyAsAString(NS_LITERAL_STRING("kernel_version"), str);
    }
    SetPropertyAsInt32(NS_LITERAL_STRING("version"), android_sdk_version);
  }
#endif

#ifdef MOZ_WIDGET_GONK
  char sdk[PROP_VALUE_MAX];
  if (__system_property_get("ro.build.version.sdk", sdk)) {
    android_sdk_version = atoi(sdk);
    SetPropertyAsInt32(NS_LITERAL_STRING("sdk_version"), android_sdk_version);

    SetPropertyAsACString(NS_LITERAL_STRING("secondaryLibrary"),
                          nsPrintfCString("SDK %u", android_sdk_version));
  }

  char characteristics[PROP_VALUE_MAX];
  if (__system_property_get("ro.build.characteristics", characteristics)) {
    if (!strcmp(characteristics, "tablet")) {
      SetPropertyAsBool(NS_LITERAL_STRING("tablet"), true);
    }
  }

  nsAutoString str;
  rv = GetPropertyAsAString(NS_LITERAL_STRING("version"), str);
  if (NS_SUCCEEDED(rv)) {
    SetPropertyAsAString(NS_LITERAL_STRING("kernel_version"), str);
  }

  const nsAdoptingString& b2g_os_name =
    mozilla::Preferences::GetString("b2g.osName");
  if (b2g_os_name) {
    SetPropertyAsAString(NS_LITERAL_STRING("name"), b2g_os_name);
  }

  const nsAdoptingString& b2g_version =
    mozilla::Preferences::GetString("b2g.version");
  if (b2g_version) {
    SetPropertyAsAString(NS_LITERAL_STRING("version"), b2g_version);
  }
#endif

#if defined(XP_LINUX) && defined(MOZ_SANDBOX)
  SandboxInfo sandInfo = SandboxInfo::Get();

  SetPropertyAsBool(NS_LITERAL_STRING("hasSeccompBPF"),
                    sandInfo.Test(SandboxInfo::kHasSeccompBPF));

  if (sandInfo.Test(SandboxInfo::kEnabledForContent)) {
    SetPropertyAsBool(NS_LITERAL_STRING("canSandboxContent"),
                      sandInfo.CanSandboxContent());
  }

  if (sandInfo.Test(SandboxInfo::kEnabledForMedia)) {
    SetPropertyAsBool(NS_LITERAL_STRING("canSandboxMedia"),
                      sandInfo.CanSandboxMedia());
  }
#endif // XP_LINUX && MOZ_SANDBOX

  return NS_OK;
}

void
nsSystemInfo::SetInt32Property(const nsAString& aPropertyName,
                               const int32_t aValue)
{
  NS_WARN_IF_FALSE(aValue > 0, "Unable to read system value");
  if (aValue > 0) {
#ifdef DEBUG
    nsresult rv =
#endif
      SetPropertyAsInt32(aPropertyName, aValue);
    NS_WARN_IF_FALSE(NS_SUCCEEDED(rv), "Unable to set property");
  }
}

void
nsSystemInfo::SetUint32Property(const nsAString& aPropertyName,
                                const uint32_t aValue)
{
  // Only one property is currently set via this function.
  // It may legitimately be zero.
#ifdef DEBUG
  nsresult rv =
#endif
    SetPropertyAsUint32(aPropertyName, aValue);
  NS_WARN_IF_FALSE(NS_SUCCEEDED(rv), "Unable to set property");
}

void
nsSystemInfo::SetUint64Property(const nsAString& aPropertyName,
                                const uint64_t aValue)
{
  NS_WARN_IF_FALSE(aValue > 0, "Unable to read system value");
  if (aValue > 0) {
#ifdef DEBUG
    nsresult rv =
#endif
      SetPropertyAsUint64(aPropertyName, aValue);
    NS_WARN_IF_FALSE(NS_SUCCEEDED(rv), "Unable to set property");
  }
}

#if defined(XP_WIN)
NS_IMETHODIMP
nsSystemInfo::Observe(nsISupports* aSubject, const char* aTopic,
                      const char16_t* aData)
{
  if (!strcmp(aTopic, "profile-do-change")) {
    nsresult rv;
    nsCOMPtr<nsIObserverService> obsService =
      do_GetService(NS_OBSERVERSERVICE_CONTRACTID, &rv);
    if (NS_FAILED(rv)) {
      return rv;
    }
    rv = obsService->RemoveObserver(this, "profile-do-change");
    if (NS_FAILED(rv)) {
      return rv;
    }
    return GetProfileHDDInfo();
  }
  return NS_OK;
}

nsresult
nsSystemInfo::GetProfileHDDInfo()
{
  nsAutoCString hddModel, hddRevision;
  nsresult rv = GetHDDInfo(NS_APP_USER_PROFILE_50_DIR, hddModel, hddRevision);
  if (NS_FAILED(rv)) {
    return rv;
  }
  rv = SetPropertyAsACString(NS_LITERAL_STRING("profileHDDModel"), hddModel);
  if (NS_FAILED(rv)) {
    return rv;
  }
  rv = SetPropertyAsACString(NS_LITERAL_STRING("profileHDDRevision"),
                             hddRevision);
  return rv;
}

NS_IMPL_ISUPPORTS_INHERITED(nsSystemInfo, nsHashPropertyBag, nsIObserver)
#endif // defined(XP_WIN)