/*
 * Copyright (c) 2023 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.
 *
 */

// CLASS HEADER
#include "frame-callback.h"

using namespace Dali;
using namespace std;

FrameCallback::FrameCallback()
: mActorIdContainer(),
  windowHalfWidth(0.0f)
{
}

void FrameCallback::SetWindowWidth(float windowWidth)
{
  windowHalfWidth = windowWidth * 0.5f;
}

void FrameCallback::AddId(uint32_t id)
{
  mActorIdContainer.PushBack(id);
}

bool FrameCallback::Update(Dali::UpdateProxy& updateProxy, float /* elapsedSeconds */)
{
  // Go through Actor ID container and check if we've hit the sides.
  for(auto&& i : mActorIdContainer)
  {
    Vector3 position;
    Vector3 size;
    if(updateProxy.GetPositionAndSize(i, position, size)) // Retrieve the position and size using the Actor ID.
    {
      float halfWidthPoint = windowHalfWidth - size.width * 0.5f;
      float xTranslation   = abs(position.x);
      if(xTranslation > halfWidthPoint)
      {
        // Actor has hit the edge, adjust the size accordingly.
        float adjustment = xTranslation - halfWidthPoint;
        size.width += adjustment * SIZE_MULTIPLIER;
        size.height += adjustment * SIZE_MULTIPLIER;

        updateProxy.SetSize(i, size); // Set the size using the UpdateProxy.
      }

      // Retrieve the actor's position and set make it more transparent the closer it is to the middle.
      Vector4 color;
      if(updateProxy.GetColor(i, color))
      {
        color.a = xTranslation / halfWidthPoint;
        updateProxy.SetColor(i, color);
      }
    }
  }

  // We don't need it to keep rendering.
  return false;
}