/*
 * 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-toolkit/devel-api/controls/super-blur-view/super-blur-view.h>
#include <dali/dali.h>

using namespace Dali;
using Dali::Toolkit::Button;
using Dali::Toolkit::PushButton;
using Dali::Toolkit::SuperBlurView;

namespace
{
const char* const BACKGROUND_IMAGE(DEMO_IMAGE_DIR "background-4.jpg");

const unsigned int DEFAULT_BLUR_LEVEL(5u); ///< The default blur level when creating SuperBlurView from the type registry

} // namespace

/**
 * This example shows a background image which is "super blurred" while the push-button control is pressed.
 */
class SuperBlurViewExample : public ConnectionTracker
{
public:
  SuperBlurViewExample(Application& application)
  : mApplication(application)
  {
    mApplication.InitSignal().Connect(this, &SuperBlurViewExample::Create);
  }

  ~SuperBlurViewExample() = default;

private:
  void Create(Application& application)
  {
    Window window = application.GetWindow();
    window.KeyEventSignal().Connect(this, &SuperBlurViewExample::OnKeyEvent);

    mSuperBlurView = SuperBlurView::New(DEFAULT_BLUR_LEVEL);
    mSuperBlurView.SetProperty(Actor::Property::PARENT_ORIGIN, ParentOrigin::CENTER);
    mSuperBlurView.SetProperty(Actor::Property::ANCHOR_POINT, AnchorPoint::CENTER);
    mSuperBlurView.SetProperty(Actor::Property::SIZE, Vector2(800, 1280));
    mSuperBlurView.SetProperty(SuperBlurView::Property::IMAGE_URL, BACKGROUND_IMAGE);
    window.Add(mSuperBlurView);

    mBlurAnimation = Animation::New(1.0f);
    mBlurAnimation.AnimateTo(Property(mSuperBlurView, mSuperBlurView.GetBlurStrengthPropertyIndex()), 1.0f);

    mClearAnimation = Animation::New(1.0f);
    mClearAnimation.AnimateTo(Property(mSuperBlurView, mSuperBlurView.GetBlurStrengthPropertyIndex()), 0.0f);

    mPushButton = PushButton::New();
    mPushButton.SetProperty(Actor::Property::PARENT_ORIGIN, ParentOrigin::BOTTOM_CENTER);
    mPushButton.SetProperty(Actor::Property::ANCHOR_POINT, AnchorPoint::BOTTOM_CENTER);
    mPushButton.SetProperty(Button::Property::LABEL, "Blur");
    mPushButton.PressedSignal().Connect(this, &SuperBlurViewExample::OnButtonPressed);
    mPushButton.ReleasedSignal().Connect(this, &SuperBlurViewExample::OnButtonReleased);
    window.Add(mPushButton);
  }

  bool OnButtonPressed(Button button)
  {
    mBlurAnimation.Play();
    return true;
  }

  bool OnButtonReleased(Button button)
  {
    mClearAnimation.Play();
    return true;
  }

  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;

  SuperBlurView mSuperBlurView;

  PushButton mPushButton;

  Animation mBlurAnimation;
  Animation mClearAnimation;
};

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

  SuperBlurViewExample test(application);

  application.MainLoop();

  return 0;
}