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/* -*- 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 "PerformanceMainThread.h"
#include "PerformanceNavigation.h"
#include "mozilla/StaticPrefs_dom.h"
#include "nsICacheInfoChannel.h"

namespace mozilla {
namespace dom {

namespace {

void GetURLSpecFromChannel(nsITimedChannel* aChannel, nsAString& aSpec) {
  aSpec.AssignLiteral("document");

  nsCOMPtr<nsIChannel> channel = do_QueryInterface(aChannel);
  if (!channel) {
    return;
  }

  nsCOMPtr<nsIURI> uri;
  nsresult rv = channel->GetURI(getter_AddRefs(uri));
  if (NS_WARN_IF(NS_FAILED(rv)) || !uri) {
    return;
  }

  nsAutoCString spec;
  rv = uri->GetSpec(spec);
  if (NS_WARN_IF(NS_FAILED(rv))) {
    return;
  }

  aSpec = NS_ConvertUTF8toUTF16(spec);
}

}  // namespace

NS_IMPL_CYCLE_COLLECTION_CLASS(PerformanceMainThread)

NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(PerformanceMainThread,
                                                Performance)
  NS_IMPL_CYCLE_COLLECTION_UNLINK(mTiming, mNavigation, mDocEntry)
  tmp->mMozMemory = nullptr;
  mozilla::DropJSObjects(this);
NS_IMPL_CYCLE_COLLECTION_UNLINK_END

NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(PerformanceMainThread,
                                                  Performance)
  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mTiming, mNavigation, mDocEntry)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END

NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN_INHERITED(PerformanceMainThread,
                                               Performance)
  NS_IMPL_CYCLE_COLLECTION_TRACE_JS_MEMBER_CALLBACK(mMozMemory)
NS_IMPL_CYCLE_COLLECTION_TRACE_END

NS_IMPL_ADDREF_INHERITED(PerformanceMainThread, Performance)
NS_IMPL_RELEASE_INHERITED(PerformanceMainThread, Performance)

// QueryInterface implementation for PerformanceMainThread
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(PerformanceMainThread)
  NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
  NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_INTERFACE_MAP_END_INHERITING(Performance)

PerformanceMainThread::PerformanceMainThread(nsPIDOMWindowInner* aWindow,
                                             nsDOMNavigationTiming* aDOMTiming,
                                             nsITimedChannel* aChannel,
                                             bool aPrincipal)
    : Performance(aWindow, aPrincipal),
      mDOMTiming(aDOMTiming),
      mChannel(aChannel) {
  MOZ_ASSERT(aWindow, "Parent window object should be provided");
  CreateNavigationTimingEntry();
}

PerformanceMainThread::~PerformanceMainThread() {
  mozilla::DropJSObjects(this);
}

void PerformanceMainThread::GetMozMemory(JSContext* aCx,
                                         JS::MutableHandle<JSObject*> aObj) {
  if (!mMozMemory) {
    mMozMemory = js::gc::NewMemoryInfoObject(aCx);
    if (mMozMemory) {
      mozilla::HoldJSObjects(this);
    }
  }

  aObj.set(mMozMemory);
}

PerformanceTiming* PerformanceMainThread::Timing() {
  if (!mTiming) {
    // For navigation timing, the third argument (an nsIHttpChannel) is null
    // since the cross-domain redirect were already checked.  The last argument
    // (zero time) for performance.timing is the navigation start value.
    mTiming = new PerformanceTiming(this, mChannel, nullptr,
                                    mDOMTiming->GetNavigationStart());
  }

  return mTiming;
}

void PerformanceMainThread::DispatchBufferFullEvent() {
  RefPtr<Event> event = NS_NewDOMEvent(this, nullptr, nullptr);
  // it bubbles, and it isn't cancelable
  event->InitEvent(NS_LITERAL_STRING("resourcetimingbufferfull"), true, false);
  event->SetTrusted(true);
  DispatchEvent(*event);
}

PerformanceNavigation* PerformanceMainThread::Navigation() {
  if (!mNavigation) {
    mNavigation = new PerformanceNavigation(this);
  }

  return mNavigation;
}

/**
 * An entry should be added only after the resource is loaded.
 * This method is not thread safe and can only be called on the main thread.
 */
void PerformanceMainThread::AddEntry(nsIHttpChannel* channel,
                                     nsITimedChannel* timedChannel) {
  MOZ_ASSERT(NS_IsMainThread());

  nsAutoString initiatorType;
  nsAutoString entryName;

  UniquePtr<PerformanceTimingData> performanceTimingData(
      PerformanceTimingData::Create(timedChannel, channel, 0, initiatorType,
                                    entryName));
  if (!performanceTimingData) {
    return;
  }

  // The PerformanceResourceTiming object will use the PerformanceTimingData
  // object to get all the required timings.
  RefPtr<PerformanceResourceTiming> performanceEntry =
      new PerformanceResourceTiming(std::move(performanceTimingData), this,
                                    entryName);

  performanceEntry->SetInitiatorType(initiatorType);
  InsertResourceEntry(performanceEntry);
}

// To be removed once bug 1124165 lands
bool PerformanceMainThread::IsPerformanceTimingAttribute(
    const nsAString& aName) {
  // Note that toJSON is added to this list due to bug 1047848
  static const char* attributes[] = {"navigationStart",
                                     "unloadEventStart",
                                     "unloadEventEnd",
                                     "redirectStart",
                                     "redirectEnd",
                                     "fetchStart",
                                     "domainLookupStart",
                                     "domainLookupEnd",
                                     "connectStart",
                                     "secureConnectionStart",
                                     "connectEnd",
                                     "requestStart",
                                     "responseStart",
                                     "responseEnd",
                                     "domLoading",
                                     "domInteractive",
                                     "domContentLoadedEventStart",
                                     "domContentLoadedEventEnd",
                                     "domComplete",
                                     "loadEventStart",
                                     "loadEventEnd",
                                     nullptr};

  for (uint32_t i = 0; attributes[i]; ++i) {
    if (aName.EqualsASCII(attributes[i])) {
      return true;
    }
  }

  return false;
}

DOMHighResTimeStamp PerformanceMainThread::GetPerformanceTimingFromString(
    const nsAString& aProperty) {
  if (!IsPerformanceTimingAttribute(aProperty)) {
    return 0;
  }
  if (aProperty.EqualsLiteral("navigationStart")) {
    // DOMHighResTimeStamp is in relation to navigationStart, so this will be
    // zero.
    return GetDOMTiming()->GetNavigationStart();
  }
  if (aProperty.EqualsLiteral("unloadEventStart")) {
    return GetDOMTiming()->GetUnloadEventStart();
  }
  if (aProperty.EqualsLiteral("unloadEventEnd")) {
    return GetDOMTiming()->GetUnloadEventEnd();
  }
  if (aProperty.EqualsLiteral("redirectStart")) {
    return Timing()->RedirectStart();
  }
  if (aProperty.EqualsLiteral("redirectEnd")) {
    return Timing()->RedirectEnd();
  }
  if (aProperty.EqualsLiteral("fetchStart")) {
    return Timing()->FetchStart();
  }
  if (aProperty.EqualsLiteral("domainLookupStart")) {
    return Timing()->DomainLookupStart();
  }
  if (aProperty.EqualsLiteral("domainLookupEnd")) {
    return Timing()->DomainLookupEnd();
  }
  if (aProperty.EqualsLiteral("connectStart")) {
    return Timing()->ConnectStart();
  }
  if (aProperty.EqualsLiteral("secureConnectionStart")) {
    return Timing()->SecureConnectionStart();
  }
  if (aProperty.EqualsLiteral("connectEnd")) {
    return Timing()->ConnectEnd();
  }
  if (aProperty.EqualsLiteral("requestStart")) {
    return Timing()->RequestStart();
  }
  if (aProperty.EqualsLiteral("responseStart")) {
    return Timing()->ResponseStart();
  }
  if (aProperty.EqualsLiteral("responseEnd")) {
    return Timing()->ResponseEnd();
  }
  if (aProperty.EqualsLiteral("domLoading")) {
    return GetDOMTiming()->GetDomLoading();
  }
  if (aProperty.EqualsLiteral("domInteractive")) {
    return GetDOMTiming()->GetDomInteractive();
  }
  if (aProperty.EqualsLiteral("domContentLoadedEventStart")) {
    return GetDOMTiming()->GetDomContentLoadedEventStart();
  }
  if (aProperty.EqualsLiteral("domContentLoadedEventEnd")) {
    return GetDOMTiming()->GetDomContentLoadedEventEnd();
  }
  if (aProperty.EqualsLiteral("domComplete")) {
    return GetDOMTiming()->GetDomComplete();
  }
  if (aProperty.EqualsLiteral("loadEventStart")) {
    return GetDOMTiming()->GetLoadEventStart();
  }
  if (aProperty.EqualsLiteral("loadEventEnd")) {
    return GetDOMTiming()->GetLoadEventEnd();
  }
  MOZ_CRASH(
      "IsPerformanceTimingAttribute and GetPerformanceTimingFromString are out "
      "of sync");
  return 0;
}

void PerformanceMainThread::InsertUserEntry(PerformanceEntry* aEntry) {
  MOZ_ASSERT(NS_IsMainThread());

  nsAutoCString uri;
  uint64_t markCreationEpoch = 0;

  if (StaticPrefs::dom_performance_enable_user_timing_logging() ||
      StaticPrefs::dom_performance_enable_notify_performance_timing()) {
    nsresult rv = NS_ERROR_FAILURE;
    nsCOMPtr<nsPIDOMWindowInner> owner = GetOwner();
    if (owner && owner->GetDocumentURI()) {
      rv = owner->GetDocumentURI()->GetHost(uri);
    }

    if (NS_FAILED(rv)) {
      // If we have no URI, just put in "none".
      uri.AssignLiteral("none");
    }
    markCreationEpoch = static_cast<uint64_t>(PR_Now() / PR_USEC_PER_MSEC);

    if (StaticPrefs::dom_performance_enable_user_timing_logging()) {
      Performance::LogEntry(aEntry, uri);
    }
  }

  if (StaticPrefs::dom_performance_enable_notify_performance_timing()) {
    TimingNotification(aEntry, uri, markCreationEpoch);
  }

  Performance::InsertUserEntry(aEntry);
}

TimeStamp PerformanceMainThread::CreationTimeStamp() const {
  return GetDOMTiming()->GetNavigationStartTimeStamp();
}

DOMHighResTimeStamp PerformanceMainThread::CreationTime() const {
  return GetDOMTiming()->GetNavigationStart();
}

void PerformanceMainThread::CreateNavigationTimingEntry() {
  MOZ_ASSERT(!mDocEntry, "mDocEntry should be null.");

  if (!StaticPrefs::dom_enable_performance_navigation_timing()) {
    return;
  }

  nsAutoString name;
  GetURLSpecFromChannel(mChannel, name);

  UniquePtr<PerformanceTimingData> timing(
      new PerformanceTimingData(mChannel, nullptr, 0));

  nsCOMPtr<nsIHttpChannel> httpChannel = do_QueryInterface(mChannel);
  if (httpChannel) {
    timing->SetPropertiesFromHttpChannel(httpChannel, mChannel);
  }

  mDocEntry = new PerformanceNavigationTiming(std::move(timing), this, name);
}

void PerformanceMainThread::QueueNavigationTimingEntry() {
  if (!mDocEntry) {
    return;
  }

  // Let's update some values.
  nsCOMPtr<nsIHttpChannel> httpChannel = do_QueryInterface(mChannel);
  if (httpChannel) {
    mDocEntry->UpdatePropertiesFromHttpChannel(httpChannel, mChannel);
  }

  QueueEntry(mDocEntry);
}

void PerformanceMainThread::GetEntries(
    nsTArray<RefPtr<PerformanceEntry>>& aRetval) {
  // We return an empty list when 'privacy.resistFingerprinting' is on.
  if (nsContentUtils::ShouldResistFingerprinting()) {
    aRetval.Clear();
    return;
  }

  aRetval = mResourceEntries;
  aRetval.AppendElements(mUserEntries);

  if (mDocEntry) {
    aRetval.AppendElement(mDocEntry);
  }

  aRetval.Sort(PerformanceEntryComparator());
}

void PerformanceMainThread::GetEntriesByType(
    const nsAString& aEntryType, nsTArray<RefPtr<PerformanceEntry>>& aRetval) {
  // We return an empty list when 'privacy.resistFingerprinting' is on.
  if (nsContentUtils::ShouldResistFingerprinting()) {
    aRetval.Clear();
    return;
  }

  if (aEntryType.EqualsLiteral("navigation")) {
    aRetval.Clear();

    if (mDocEntry) {
      aRetval.AppendElement(mDocEntry);
    }
    return;
  }

  Performance::GetEntriesByType(aEntryType, aRetval);
}

void PerformanceMainThread::GetEntriesByName(
    const nsAString& aName, const Optional<nsAString>& aEntryType,
    nsTArray<RefPtr<PerformanceEntry>>& aRetval) {
  // We return an empty list when 'privacy.resistFingerprinting' is on.
  if (nsContentUtils::ShouldResistFingerprinting()) {
    aRetval.Clear();
    return;
  }

  Performance::GetEntriesByName(aName, aEntryType, aRetval);

  // The navigation entry is the first one. If it exists and the name matches,
  // let put it in front.
  if (mDocEntry && mDocEntry->GetName().Equals(aName)) {
    aRetval.InsertElementAt(0, mDocEntry);
    return;
  }
}

}  // namespace dom
}  // namespace mozilla