/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 et cindent: */
/* 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/. */

#ifndef mozilla_dom_nsSpeechTask_h
#define mozilla_dom_nsSpeechTask_h

#include "SpeechSynthesisUtterance.h"
#include "AudioChannelAgent.h"
#include "nsISpeechService.h"
#include "nsWeakReference.h"

namespace mozilla {

class SharedBuffer;

namespace dom {

class SpeechSynthesisUtterance;
class SpeechSynthesis;

class nsSpeechTask : public nsISpeechTask,
                     public nsIAudioChannelAgentCallback,
                     public nsSupportsWeakReference {
 public:
  NS_DECL_CYCLE_COLLECTING_ISUPPORTS
  NS_DECL_CYCLE_COLLECTION_CLASS_AMBIGUOUS(nsSpeechTask, nsISpeechTask)

  NS_DECL_NSISPEECHTASK
  NS_DECL_NSIAUDIOCHANNELAGENTCALLBACK

  explicit nsSpeechTask(SpeechSynthesisUtterance* aUtterance,
                        bool aShouldResistFingerprinting);
  nsSpeechTask(float aVolume, const nsAString& aText,
               bool aShouldResistFingerprinting);

  virtual void Pause();

  virtual void Resume();

  virtual void Cancel();

  virtual void ForceEnd();

  void SetSpeechSynthesis(SpeechSynthesis* aSpeechSynthesis);

  void Init();

  void SetChosenVoiceURI(const nsAString& aUri);

  virtual void SetAudioOutputVolume(float aVolume);

  void ForceError(float aElapsedTime, uint32_t aCharIndex);

  bool IsPreCanceled() { return mPreCanceled; };

  bool IsPrePaused() { return mPrePaused; }

  bool ShouldResistFingerprinting() { return mShouldResistFingerprinting; }

  enum { STATE_PENDING, STATE_SPEAKING, STATE_ENDED };

  uint32_t GetState() const { return mState; }

  bool IsSpeaking() const { return mState == STATE_SPEAKING; }

  bool IsPending() const { return mState == STATE_PENDING; }

 protected:
  virtual ~nsSpeechTask();

  nsresult DispatchStartImpl();

  virtual nsresult DispatchStartImpl(const nsAString& aUri);

  virtual nsresult DispatchEndImpl(float aElapsedTime, uint32_t aCharIndex);

  virtual nsresult DispatchPauseImpl(float aElapsedTime, uint32_t aCharIndex);

  virtual nsresult DispatchResumeImpl(float aElapsedTime, uint32_t aCharIndex);

  virtual nsresult DispatchErrorImpl(float aElapsedTime, uint32_t aCharIndex);

  virtual nsresult DispatchBoundaryImpl(const nsAString& aName,
                                        float aElapsedTime, uint32_t aCharIndex,
                                        uint32_t aCharLength, uint8_t argc);

  virtual nsresult DispatchMarkImpl(const nsAString& aName, float aElapsedTime,
                                    uint32_t aCharIndex);

  RefPtr<SpeechSynthesisUtterance> mUtterance;

  float mVolume;

  nsString mText;

  bool mInited;

  bool mPrePaused;

  bool mPreCanceled;

 private:
  void End();

  void CreateAudioChannelAgent();

  void DestroyAudioChannelAgent();

  nsCOMPtr<nsISpeechTaskCallback> mCallback;

  RefPtr<mozilla::dom::AudioChannelAgent> mAudioChannelAgent;

  RefPtr<SpeechSynthesis> mSpeechSynthesis;

  nsString mChosenVoiceURI;

  bool mShouldResistFingerprinting;

  uint32_t mState;
};

}  // namespace dom
}  // namespace mozilla

#endif