/*
 * 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/control-devel.h>
#include <dali-toolkit/devel-api/visual-factory/transition-data.h>
#include <dali-toolkit/devel-api/visuals/color-visual-properties-devel.h>
#include <dali-toolkit/devel-api/visuals/visual-properties-devel.h>

using namespace Dali;
using namespace Dali::Toolkit;

namespace
{
const char* IMAGE_FILE(DEMO_IMAGE_DIR "gallery-medium-1.jpg");

const float BLUR_RADIUS_VALUE(10.0f);
const float NO_BLUR_VALUE(0.0f);
const float ANIMATION_DURATION(2.0f);

const Property::Value SHADOW{
  {Visual::Property::TYPE, Visual::COLOR},
  {Visual::Property::MIX_COLOR, Vector4(0.0f, 0.0f, 0.0f, 0.5f)},
  {Visual::Property::TRANSFORM, Property::Map{{Visual::Transform::Property::OFFSET, Vector2(0.05f, 0.05f)}, {Visual::Transform::Property::SIZE, Vector2(1.05f, 1.05f)}, {Visual::Transform::Property::ORIGIN, Align::CENTER}, {Visual::Transform::Property::ANCHOR_POINT, Align::CENTER}}},
  {DevelColorVisual::Property::BLUR_RADIUS, BLUR_RADIUS_VALUE}};

} // namespace

// This example shows the blur radius property of the color visual and animates it.
//
class ColorVisualExample : public ConnectionTracker
{
public:
  ColorVisualExample(Application& application)
  : mApplication(application),
    mShadowVisible(true)
  {
    // Connect to the Application's Init signal
    mApplication.InitSignal().Connect(this, &ColorVisualExample::Create);
  }

  ~ColorVisualExample()
  {
    // 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::WHITE);

    mImageView = ImageView::New(IMAGE_FILE);
    mImageView.SetProperty(Actor::Property::PARENT_ORIGIN, ParentOrigin::CENTER);
    mImageView.SetProperty(Actor::Property::SIZE, Vector2(200.0f, 200.0f));
    mImageView.SetProperty(DevelControl::Property::SHADOW, SHADOW);

    window.Add(mImageView);

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

    // Respond to key events
    window.KeyEventSignal().Connect(this, &ColorVisualExample::OnKeyEvent);
  }

  bool OnTouch(Actor actor, const TouchEvent& touch)
  {
    if(touch.GetState(0) == PointState::UP)
    {
      float initialValue, targetValue;
      if(!mShadowVisible)
      {
        initialValue = NO_BLUR_VALUE;
        targetValue  = BLUR_RADIUS_VALUE;
      }
      else
      {
        initialValue = BLUR_RADIUS_VALUE;
        targetValue  = NO_BLUR_VALUE;
      }

      mShadowVisible = !mShadowVisible;

      TransitionData transitionData = TransitionData::New(Property::Map().Add("target", "shadow").Add("property", "blurRadius").Add("initialValue", initialValue).Add("targetValue", targetValue).Add("animator", Property::Map().Add("duration", ANIMATION_DURATION)));
      Animation      animation      = DevelControl::CreateTransition(Toolkit::Internal::GetImplementation(mImageView), transitionData);
      animation.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;
  ImageView    mImageView;
  bool         mShadowVisible;
};

int DALI_EXPORT_API main(int argc, char** argv)
{
  Application        application = Application::New(&argc, &argv);
  ColorVisualExample test(application);
  application.MainLoop();
  return 0;
}