/* -*- 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 "TelemetryCommon.h"

#include <cstring>
#include "js/String.h"
#include "mozilla/TimeStamp.h"
#include "mozilla/StaticPrefs_toolkit.h"
#include "nsComponentManagerUtils.h"
#include "nsIConsoleService.h"
#include "nsITelemetry.h"
#include "nsServiceManagerUtils.h"
#include "nsThreadUtils.h"
#include "nsVersionComparator.h"
#include "TelemetryProcessData.h"
#include "Telemetry.h"
#include "mozilla/Uptime.h"

namespace mozilla::Telemetry::Common {

bool IsExpiredVersion(const char* aExpiration) {
  MOZ_ASSERT(aExpiration);
  // Note: We intentionally don't construct a static Version object here as we
  // saw odd crashes around this (see bug 1334105).
  return strcmp(aExpiration, "never") && strcmp(aExpiration, "default") &&
         (mozilla::Version(aExpiration) <= MOZ_APP_VERSION);
}

bool IsInDataset(uint32_t aDataset, uint32_t aContainingDataset) {
  if (aDataset == aContainingDataset) {
    return true;
  }

  // The "optin on release channel" dataset is a superset of the
  // "optout on release channel one".
  if (aContainingDataset == nsITelemetry::DATASET_PRERELEASE_CHANNELS &&
      aDataset == nsITelemetry::DATASET_ALL_CHANNELS) {
    return true;
  }

  return false;
}

bool CanRecordDataset(uint32_t aDataset, bool aCanRecordBase,
                      bool aCanRecordExtended) {
  // If we are extended telemetry is enabled, we are allowed to record
  // regardless of the dataset.
  if (aCanRecordExtended) {
    return true;
  }

  // If base telemetry data is enabled and we're trying to record base
  // telemetry, allow it.
  if (aCanRecordBase &&
      IsInDataset(aDataset, nsITelemetry::DATASET_ALL_CHANNELS)) {
    return true;
  }

  // We're not recording extended telemetry or this is not the base
  // dataset. Bail out.
  return false;
}

bool CanRecordInProcess(RecordedProcessType processes,
                        GeckoProcessType processType) {
  // We can use (1 << ProcessType) due to the way RecordedProcessType is
  // defined.
  bool canRecordProcess =
      !!(processes & static_cast<RecordedProcessType>(1 << processType));

  return canRecordProcess;
}

bool CanRecordInProcess(RecordedProcessType processes, ProcessID processId) {
  return CanRecordInProcess(processes, GetGeckoProcessType(processId));
}

bool CanRecordProduct(SupportedProduct aProducts) {
  return mozilla::StaticPrefs::
             toolkit_telemetry_testing_overrideProductsCheck() ||
         !!(aProducts & GetCurrentProduct());
}

nsresult MsSinceProcessStart(double* aResult) {
  *aResult =
      (TimeStamp::NowLoRes() - TimeStamp::ProcessCreation()).ToMilliseconds();
  return NS_OK;
}

nsresult MsSinceProcessStartIncludingSuspend(double* aResult) {
  auto rv = mozilla::ProcessUptimeMs();
  if (rv) {
    *aResult = rv.value();
    return NS_OK;
  }
  return NS_ERROR_NOT_AVAILABLE;
}

nsresult MsSinceProcessStartExcludingSuspend(double* aResult) {
  auto rv = mozilla::ProcessUptimeExcludingSuspendMs();
  if (rv) {
    *aResult = rv.value();
    return NS_OK;
  }
  return NS_ERROR_NOT_AVAILABLE;
}

void LogToBrowserConsole(uint32_t aLogLevel, const nsAString& aMsg) {
  if (!NS_IsMainThread()) {
    nsString msg(aMsg);
    nsCOMPtr<nsIRunnable> task = NS_NewRunnableFunction(
        "Telemetry::Common::LogToBrowserConsole",
        [aLogLevel, msg]() { LogToBrowserConsole(aLogLevel, msg); });
    NS_DispatchToMainThread(task.forget(), NS_DISPATCH_NORMAL);
    return;
  }

  nsCOMPtr<nsIConsoleService> console(
      do_GetService("@mozilla.org/consoleservice;1"));
  if (!console) {
    NS_WARNING("Failed to log message to console.");
    return;
  }

  nsCOMPtr<nsIScriptError> error(do_CreateInstance(NS_SCRIPTERROR_CONTRACTID));
  error->Init(aMsg, u""_ns, u""_ns, 0, 0, aLogLevel, "chrome javascript"_ns,
              false /* from private window */, true /* from chrome context */);
  console->LogMessage(error);
}

const char* GetNameForProcessID(ProcessID process) {
  MOZ_ASSERT(process < ProcessID::Count);
  return ProcessIDToString[static_cast<uint32_t>(process)];
}

ProcessID GetIDForProcessName(const char* aProcessName) {
  for (uint32_t id = 0; id < static_cast<uint32_t>(ProcessID::Count); id++) {
    if (!strcmp(GetNameForProcessID(ProcessID(id)), aProcessName)) {
      return ProcessID(id);
    }
  }

  return ProcessID::Count;
}

GeckoProcessType GetGeckoProcessType(ProcessID process) {
  MOZ_ASSERT(process < ProcessID::Count);
  return ProcessIDToGeckoProcessType[static_cast<uint32_t>(process)];
}

bool IsStringCharValid(const char aChar, const bool aAllowInfixPeriod,
                       const bool aAllowInfixUnderscore) {
  return (aChar >= 'A' && aChar <= 'Z') || (aChar >= 'a' && aChar <= 'z') ||
         (aChar >= '0' && aChar <= '9') ||
         (aAllowInfixPeriod && (aChar == '.')) ||
         (aAllowInfixUnderscore && (aChar == '_'));
}

bool IsValidIdentifierString(const nsACString& aStr, const size_t aMaxLength,
                             const bool aAllowInfixPeriod,
                             const bool aAllowInfixUnderscore) {
  // Check string length.
  if (aStr.Length() > aMaxLength) {
    return false;
  }

  // Check string characters.
  const char* first = aStr.BeginReading();
  const char* end = aStr.EndReading();

  for (const char* cur = first; cur < end; ++cur) {
    const bool infix = (cur != first) && (cur != (end - 1));
    if (!IsStringCharValid(*cur, aAllowInfixPeriod && infix,
                           aAllowInfixUnderscore && infix)) {
      return false;
    }
  }

  return true;
}

JSString* ToJSString(JSContext* cx, const nsACString& aStr) {
  const NS_ConvertUTF8toUTF16 wide(aStr);
  return JS_NewUCStringCopyN(cx, wide.Data(), wide.Length());
}

JSString* ToJSString(JSContext* cx, const nsAString& aStr) {
  return JS_NewUCStringCopyN(cx, aStr.Data(), aStr.Length());
}

SupportedProduct GetCurrentProduct() {
#if defined(MOZ_WIDGET_ANDROID)
  return SupportedProduct::Fennec;
#elif defined(MOZ_THUNDERBIRD)
  return SupportedProduct::Thunderbird;
#else
  return SupportedProduct::Firefox;
#endif
}

}  // namespace mozilla::Telemetry::Common