/* -*- 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/. */

#ifndef GFX_VR_MANAGER_H
#define GFX_VR_MANAGER_H

#include "nsRefPtrHashtable.h"
#include "nsTArray.h"
#include "nsTHashtable.h"
#include "nsDataHashtable.h"
#include "mozilla/TimeStamp.h"
#include "gfxVR.h"

class nsITimer;
namespace mozilla {
namespace layers {
class TextureHost;
}
namespace gfx {

class VRLayerParent;
class VRManagerParent;
class VRDisplayHost;
#if !defined(MOZ_WIDGET_ANDROID)
class VRService;
#endif
class VRSystemManagerPuppet;
class VRSystemManagerExternal;

class VRManager {
  NS_INLINE_DECL_THREADSAFE_REFCOUNTING(mozilla::gfx::VRManager)

 public:
  static void ManagerInit();
  static VRManager* Get();

  void AddVRManagerParent(VRManagerParent* aVRManagerParent);
  void RemoveVRManagerParent(VRManagerParent* aVRManagerParent);

  void NotifyVsync(const TimeStamp& aVsyncTimestamp);
  void NotifyVRVsync(const uint32_t& aDisplayID);
  void RefreshVRDisplays(bool aMustDispatch = false);
  void RefreshVRControllers();
  void ScanForControllers();
  void RemoveControllers();
  template <class T>
  void NotifyGamepadChange(uint32_t aIndex, const T& aInfo);
  RefPtr<gfx::VRDisplayHost> GetDisplay(const uint32_t& aDisplayID);
  void GetVRDisplayInfo(nsTArray<VRDisplayInfo>& aDisplayInfo);
  RefPtr<gfx::VRControllerHost> GetController(const uint32_t& aControllerID);
  void GetVRControllerInfo(nsTArray<VRControllerInfo>& aControllerInfo);
  void CreateVRTestSystem();
  VRSystemManagerPuppet* GetPuppetManager();
  VRSystemManagerExternal* GetExternalManager();

  void VibrateHaptic(uint32_t aControllerIdx, uint32_t aHapticIndex,
                     double aIntensity, double aDuration,
                     const VRManagerPromise& aPromise);
  void StopVibrateHaptic(uint32_t aControllerIdx);
  void NotifyVibrateHapticCompleted(const VRManagerPromise& aPromise);
  void DispatchSubmitFrameResult(uint32_t aDisplayID,
                                 const VRSubmitFrameResultInfo& aResult);
  void StartVRNavigation(const uint32_t& aDisplayID);
  void StopVRNavigation(const uint32_t& aDisplayID,
                        const TimeDuration& aTimeout);

  void Shutdown();
  bool IsPresenting();

 protected:
  VRManager();
  ~VRManager();

 private:
  void Destroy();
  void Init();
  void StartTasks();
  void StopTasks();
  static void TaskTimerCallback(nsITimer* aTimer, void* aClosure);
  void RunTasks();
  void Run1msTasks(double aDeltaTime);
  void Run10msTasks();
  void Run100msTasks();
  uint32_t GetOptimalTaskInterval();

  void DispatchVRDisplayInfoUpdate();
  void UpdateRequestedDevices();
  void EnumerateVRDisplays();
  void CheckForInactiveTimeout();

  typedef nsTHashtable<nsRefPtrHashKey<VRManagerParent>> VRManagerParentSet;
  VRManagerParentSet mVRManagerParents;

  typedef nsTArray<RefPtr<VRSystemManager>> VRSystemManagerArray;
  VRSystemManagerArray mManagers;
  nsTArray<uint32_t> mVRDisplayIDs;
  nsTArray<uint32_t> mVRControllerIDs;

  Atomic<bool> mInitialized;

  TimeStamp mLastControllerEnumerationTime;
  TimeStamp mLastDisplayEnumerationTime;
  TimeStamp mLastActiveTime;
  TimeStamp mLastTickTime;
  double mAccumulator100ms;
  RefPtr<VRSystemManagerPuppet> mPuppetManager;
  RefPtr<VRSystemManagerExternal> mExternalManager;
  bool mVRDisplaysRequested;
  bool mVRDisplaysRequestedNonFocus;
  bool mVRControllersRequested;
  bool mVRServiceStarted;
  uint32_t mTaskInterval;
  RefPtr<nsITimer> mTaskTimer;
};

}  // namespace gfx
}  // namespace mozilla

#endif  // GFX_VR_MANAGER_H