/* -*- 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/dom/PlayPromise.h"

#include "mozilla/Logging.h"

#include "mozilla/Telemetry.h"

extern mozilla::LazyLogModule gMediaElementLog;

#define PLAY_PROMISE_LOG(msg, ...)                                             \

  MOZ_LOG(gMediaElementLog, LogLevel::Debug, (msg, ##__VA_ARGS__))

namespace mozilla {

namespace dom {

PlayPromise::PlayPromise(nsIGlobalObject* aGlobal)

  : Promise(aGlobal)

{

}

PlayPromise::~PlayPromise()

{

  if (!mFulfilled && PromiseObj()) {

    MaybeReject(NS_ERROR_DOM_ABORT_ERR);

  }

}

/* static */

already_AddRefed<PlayPromise>

PlayPromise::Create(nsIGlobalObject* aGlobal, ErrorResult& aRv)

{

  RefPtr<PlayPromise> promise = new PlayPromise(aGlobal);

  promise->CreateWrapper(nullptr, aRv);

  return aRv.Failed() ? nullptr : promise.forget();

}

void

PlayPromise::MaybeResolveWithUndefined()

{

  if (mFulfilled) {

    return;

  }

  mFulfilled = true;

  PLAY_PROMISE_LOG("PlayPromise %p resolved with undefined", this);

  auto reason = Telemetry::LABELS_MEDIA_PLAY_PROMISE_RESOLUTION::Resolved;

  Telemetry::AccumulateCategorical(reason);

  Promise::MaybeResolveWithUndefined();

}

using PlayLabel = Telemetry::LABELS_MEDIA_PLAY_PROMISE_RESOLUTION;

struct PlayPromiseTelemetryResult

{

  nsresult mValue;

  PlayLabel mLabel;

  const char* mName;

};

static const PlayPromiseTelemetryResult sPlayPromiseTelemetryResults[] = {

  {

    NS_ERROR_DOM_MEDIA_NOT_ALLOWED_ERR,

    PlayLabel::NotAllowedErr,

    "NotAllowedErr",

  },

  {

    NS_ERROR_DOM_MEDIA_NOT_SUPPORTED_ERR,

    PlayLabel::SrcNotSupportedErr,

    "SrcNotSupportedErr",

  },

  {

    NS_ERROR_DOM_MEDIA_ABORT_ERR,

    PlayLabel::PauseAbortErr,

    "PauseAbortErr",

  },

  {

    NS_ERROR_DOM_ABORT_ERR,

    PlayLabel::AbortErr,

    "AbortErr",

  },

};

static const PlayPromiseTelemetryResult*

FindPlayPromiseTelemetryResult(nsresult aReason)

{

  for (const auto& p : sPlayPromiseTelemetryResults) {

    if (p.mValue == aReason) {

      return &p;

    }

  }

  return nullptr;

}

static PlayLabel

ToPlayResultLabel(nsresult aReason)

{

  auto p = FindPlayPromiseTelemetryResult(aReason);

  return p ? p->mLabel : PlayLabel::UnknownErr;

}

static const char*

ToPlayResultStr(nsresult aReason)

{

  auto p = FindPlayPromiseTelemetryResult(aReason);

  return p ? p->mName : "UnknownErr";

}

void

PlayPromise::MaybeReject(nsresult aReason)

{

  if (mFulfilled) {

    return;

  }

  mFulfilled = true;

  PLAY_PROMISE_LOG("PlayPromise %p rejected with 0x%x (%s)",

                   this,

                   static_cast<uint32_t>(aReason),

                   ToPlayResultStr(aReason));

  Telemetry::AccumulateCategorical(ToPlayResultLabel(aReason));

  Promise::MaybeReject(aReason);

}

} // namespace dom

} // namespace mozilla