/*
 * Copyright (c) 2020 Samsung Electronics Co., Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */

#include <dali-toolkit/dali-toolkit.h>
#include <dali/devel-api/adaptor-framework/tilt-sensor.h>

using namespace Dali;
using Dali::Toolkit::TextLabel;

// This example shows how to use sensor using a simple TextLabel
//
class TiltController : public ConnectionTracker
{
public:
  TiltController(Application& application)
  : mApplication(application)
  {
    // Connect to the Application's Init signal
    mApplication.InitSignal().Connect(this, &TiltController::Create);
  }

  ~TiltController()
  {
    // Nothing to do here;
  }

  // The Init signal is received once (only) during the Application lifetime
  void Create(Application& application)
  {
    // Get a handle to the window
    Window window = application.GetWindow();
    window.SetBackgroundColor(Color::BLUE);

    mTextLabel = TextLabel::New("Tilt Sensor Demo");
    mTextLabel.SetProperty(Actor::Property::PARENT_ORIGIN, ParentOrigin::CENTER);
    mTextLabel.SetProperty(Actor::Property::ANCHOR_POINT, AnchorPoint::CENTER);
    mTextLabel.SetProperty(TextLabel::Property::HORIZONTAL_ALIGNMENT, "CENTER");
    mTextLabel.SetProperty(TextLabel::Property::VERTICAL_ALIGNMENT, "CENTER");
    mTextLabel.SetProperty(TextLabel::Property::TEXT_COLOR, Color::WHITE);
    mTextLabel.SetProperty(TextLabel::Property::POINT_SIZE, 15.0f);
    mTextLabel.SetProperty(Dali::Actor::Property::NAME, "tiltLabel");
    window.Add(mTextLabel);

    // Respond to a click anywhere on the window
    window.GetRootLayer().TouchedSignal().Connect(this, &TiltController::OnTouch);

    CreateSensor();

    // Connect signals to allow Back and Escape to exit.
    window.KeyEventSignal().Connect(this, &TiltController::OnKeyEvent);
  }

  void CreateSensor()
  {
    mTiltSensor = TiltSensor::Get();
    if(mTiltSensor.Start())
    {
      // Get notifications when the device is tilted
      mTiltSensor.TiltedSignal().Connect(this, &TiltController::OnTilted);
    }
  }

  bool OnTouch(Actor actor, const TouchEvent& touch)
  {
    // quit the application
    mApplication.Quit();
    return true;
  }

  void OnTilted(const TiltSensor& sensor)
  {
    Quaternion pitchRot(Radian(Degree(sensor.GetPitch() * 90.0f)), Vector3(1, 0, 0));
    Quaternion rollRot(Radian(Degree(sensor.GetRoll() * 90.0f)), Vector3(0, 1, 0));

    mTextLabel.SetProperty(Actor::Property::ORIENTATION, Quaternion());
    mTextLabel.RotateBy(rollRot);
    mTextLabel.RotateBy(pitchRot);
    ;
  }

  /**
   * @brief OnKeyEvent signal handler.
   * @param[in] event The key event information
   */
  void OnKeyEvent(const KeyEvent& event)
  {
    if(event.GetState() == KeyEvent::DOWN)
    {
      if(IsKey(event, Dali::DALI_KEY_ESCAPE) || IsKey(event, Dali::DALI_KEY_BACK))
      {
        mApplication.Quit();
      }
    }
  }

private:
  Application& mApplication;
  TiltSensor   mTiltSensor;
  TextLabel    mTextLabel;
};

int DALI_EXPORT_API main(int argc, char** argv)
{
  Application    application = Application::New(&argc, &argv);
  TiltController test(application);

  application.MainLoop();
  return 0;
}