/* -*- 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 "PuppetSession.h"

#include "nsString.h"
#include "VRPuppetCommandBuffer.h"
#include "mozilla/StaticPrefs_dom.h"

#if defined(XP_WIN)
#  include <d3d11.h>
#  include "mozilla/gfx/DeviceManagerDx.h"
#elif defined(XP_MACOSX)
#  include "mozilla/gfx/MacIOSurface.h"
#endif

using namespace mozilla::gfx;

namespace mozilla::gfx {

PuppetSession::PuppetSession() = default;

PuppetSession::~PuppetSession() { Shutdown(); }

bool PuppetSession::Initialize(mozilla::gfx::VRSystemState& aSystemState,
                               bool aDetectRuntimesOnly) {
  if (!StaticPrefs::dom_vr_enabled() || !StaticPrefs::dom_vr_puppet_enabled()) {
    return false;
  }
  if (!VRPuppetCommandBuffer::IsCreated()) {
    // We only want to initialize VRPuppetCommandBuffer on the main thread.
    // We can assume if it is not initialized, that the puppet display
    // would not be enumerated.
    return false;
  }
  if (aDetectRuntimesOnly) {
    aSystemState.displayState.capabilityFlags |=
        VRDisplayCapabilityFlags::Cap_ImmersiveVR;
    return false;
  }
  VRPuppetCommandBuffer::Get().Run(aSystemState);
  if (!aSystemState.displayState.isConnected) {
    return false;
  }
#if defined(XP_WIN)
  if (!CreateD3DObjects()) {
    Shutdown();
    return false;
  }
#endif

  // Succeeded
  return true;
}

#if defined(XP_WIN)
bool PuppetSession::CreateD3DObjects() {
  RefPtr<ID3D11Device> device = gfx::DeviceManagerDx::Get()->GetVRDevice();
  if (!device) {
    return false;
  }
  if (!CreateD3DContext(device)) {
    return false;
  }
  return true;
}
#endif

void PuppetSession::Shutdown() {}

void PuppetSession::StartFrame(mozilla::gfx::VRSystemState& aSystemState) {
  VRPuppetCommandBuffer::Get().Run(aSystemState);
}

void PuppetSession::ProcessEvents(mozilla::gfx::VRSystemState& aSystemState) {
  VRPuppetCommandBuffer& puppet = VRPuppetCommandBuffer::Get();
  puppet.Run(aSystemState);
  if (!aSystemState.displayState.isConnected) {
    mShouldQuit = true;
  }
}

#if defined(XP_WIN)
bool PuppetSession::SubmitFrame(
    const mozilla::gfx::VRLayer_Stereo_Immersive& aLayer,
    ID3D11Texture2D* aTexture) {
  return VRPuppetCommandBuffer::Get().SubmitFrame();
}
#elif defined(XP_MACOSX)
bool PuppetSession::SubmitFrame(
    const mozilla::gfx::VRLayer_Stereo_Immersive& aLayer,
    const VRLayerTextureHandle& aTexture) {
  return VRPuppetCommandBuffer::Get().SubmitFrame();
}
#endif

void PuppetSession::StopPresentation() {
  VRPuppetCommandBuffer::Get().StopPresentation();
}

bool PuppetSession::StartPresentation() {
  VRPuppetCommandBuffer::Get().StartPresentation();
  return true;
}

void PuppetSession::VibrateHaptic(uint32_t aControllerIdx,
                                  uint32_t aHapticIndex, float aIntensity,
                                  float aDuration) {
  VRPuppetCommandBuffer::Get().VibrateHaptic(aControllerIdx, aHapticIndex,
                                             aIntensity, aDuration);
}

void PuppetSession::StopVibrateHaptic(uint32_t aControllerIdx) {
  VRPuppetCommandBuffer::Get().StopVibrateHaptic(aControllerIdx);
}

void PuppetSession::StopAllHaptics() {
  VRPuppetCommandBuffer::Get().StopAllHaptics();
}

}  // namespace mozilla::gfx