/*
 * Copyright (c) 2021 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.
 *
 */

/**
 * @file text-scrolling-example.cpp
 * @brief Shows text labels with scrolling text and allows a text label and text field control to be scrolled vertically
 */

// EXTERNAL INCLUDES
#include <dali-toolkit/dali-toolkit.h>

using namespace Dali;
using namespace Dali::Toolkit;

namespace
{
const float   WINDOW_HEIGHT_MULTIPLIER(1.5f);
const Vector2 BOX_SIZE(Vector2(330.0f, 80.0f));
const Vector2 SCROLLING_BOX_SIZE(Vector2(330.0f, 40.0f));
const float   MAX_OFFSCREEN_RENDERING_SIZE = 2048.f;
const float   SCREEN_BORDER                = 5.0f; // Border around screen that Popups and handles will not exceed

const char* ALIGNMENT_TABLE[] =
  {
    "BEGIN",
    "CENTER",
    "END"};
const unsigned int ALIGNMENT_TABLE_COUNT = sizeof(ALIGNMENT_TABLE) / sizeof(ALIGNMENT_TABLE[0]);

enum Labels
{
  SMALL    = 1u,
  RTL      = 1u << 1,
  LARGE    = 1u << 2,
  RTL_LONG = 1u << 4,
  NONE     = 1u << 6,
};
} // namespace
/**
 * @brief The main class of the demo.
 */
class TextScrollingExample : public ConnectionTracker
{
public:
  TextScrollingExample(Application& application)
  : mApplication(application),
    mTargetActorPosition(),
    mTargetActorSize(),
    mToggleColor(false)
  {
    // Connect to the Application's Init signal
    mApplication.InitSignal().Connect(this, &TextScrollingExample::Create);
  }

  ~TextScrollingExample()
  {
    // Nothing to do here.
  }

  void CreateBox(const std::string& name, Actor& box, Actor parent, const Vector2& size)
  {
    box.SetProperty(Dali::Actor::Property::NAME, name);
    box.SetProperty(Actor::Property::ANCHOR_POINT, AnchorPoint::CENTER);
    box.SetProperty(Actor::Property::PARENT_ORIGIN, ParentOrigin::CENTER);
    box.SetResizePolicy(ResizePolicy::FIT_TO_CHILDREN, Dimension::HEIGHT);
    box.SetResizePolicy(ResizePolicy::FIXED, Dimension::WIDTH);
    box.SetProperty(Actor::Property::SIZE, Vector2(size.width, 0.f));
    parent.Add(box);

    Dali::Property::Map border;
    border.Insert(Toolkit::Visual::Property::TYPE, Visual::BORDER);
    border.Insert(BorderVisual::Property::COLOR, Color::BLUE);
    border.Insert(BorderVisual::Property::SIZE, 1.f);
    box.SetProperty(Control::Property::BACKGROUND, border);
  }

  void CreateLabel(Actor& label, const std::string text, Actor parent, bool scrollOnStart, PushButton button)
  {
    label = TextLabel::New(text);
    label.SetResizePolicy(ResizePolicy::FILL_TO_PARENT, Dimension::WIDTH);
    label.SetResizePolicy(ResizePolicy::DIMENSION_DEPENDENCY, Dimension::HEIGHT);
    label.SetProperty(Actor::Property::PADDING, Padding(1.0f, 1.0f, 1.0f, 1.0f));
    label.SetProperty(Actor::Property::ANCHOR_POINT, AnchorPoint::CENTER);
    label.SetProperty(Actor::Property::PARENT_ORIGIN, ParentOrigin::CENTER);
    parent.Add(label);

    if(scrollOnStart)
    {
      label.SetProperty(TextLabel::Property::ENABLE_AUTO_SCROLL, true);
    }

    button.SetResizePolicy(ResizePolicy::FIXED, Dimension::ALL_DIMENSIONS);
    button.SetProperty(Actor::Property::SIZE, Vector2(BOX_SIZE.height, BOX_SIZE.height));
    button.SetProperty(Actor::Property::PARENT_ORIGIN, ParentOrigin::TOP_RIGHT);
    button.SetProperty(Actor::Property::ANCHOR_POINT, AnchorPoint::TOP_LEFT);
    parent.Add(button);
  }

  /**
   * One-time setup in response to Application InitSignal.
   */
  void Create(Application& application)
  {
    Window window = application.GetWindow();
    mWindowSize   = window.GetSize();

    window.KeyEventSignal().Connect(this, &TextScrollingExample::OnKeyEvent);

    // Create Root actor
    Actor rootActor = Actor::New();
    rootActor.SetProperty(Dali::Actor::Property::NAME, "rootActor");
    rootActor.SetResizePolicy(ResizePolicy::FIXED, Dimension::ALL_DIMENSIONS);
    rootActor.SetProperty(Actor::Property::SIZE, mWindowSize);
    rootActor.SetProperty(Actor::Property::ANCHOR_POINT, AnchorPoint::TOP_LEFT);

    window.Add(rootActor);

    mAnimation = Animation::New(1.0f);

    const Size targetActorSize(mWindowSize.width, mWindowSize.height * WINDOW_HEIGHT_MULTIPLIER);

    // Create Desktop
    Control desktop = Control::New();
    desktop.SetBackgroundColor(Color::WHITE);
    desktop.SetProperty(Dali::Actor::Property::NAME, "desktopActor");
    desktop.SetProperty(Actor::Property::ANCHOR_POINT, AnchorPoint::TOP_LEFT);
    desktop.SetResizePolicy(ResizePolicy::FIXED, Dimension::ALL_DIMENSIONS);
    desktop.SetProperty(Actor::Property::SIZE, targetActorSize);

    rootActor.Add(desktop); // Add desktop (content) to offscreen actor

    // Create Boxes
    Control boxA = Control::New();
    Control boxB = Control::New();
    Control boxC = Control::New();
    Control boxD = Control::New();
    Control boxE = Control::New();

    CreateBox("boxA", boxA, desktop, BOX_SIZE);
    boxA.SetProperty(Actor::Property::POSITION, Vector3(0.0f, -500.0f, 1.0f));

    // Create TextField
    TextField field = TextField::New();
    field.SetResizePolicy(ResizePolicy::FILL_TO_PARENT, Dimension::ALL_DIMENSIONS);
    field.SetProperty(Actor::Property::PADDING, Padding(1.0f, 1.0f, 1.0f, 1.0f));
    field.SetProperty(Actor::Property::ANCHOR_POINT, AnchorPoint::TOP_LEFT);
    field.SetProperty(TextField::Property::PLACEHOLDER_TEXT, "Enter Folder Name");
    field.SetProperty(TextField::Property::DECORATION_BOUNDING_BOX, Rect<int>(SCREEN_BORDER, SCREEN_BORDER, mWindowSize.width - SCREEN_BORDER * 2, mWindowSize.height - SCREEN_BORDER * 2));
    boxA.Add(field);
    boxA.SetProperty(Actor::Property::SIZE, BOX_SIZE);

    CreateBox("boxB", boxB, desktop, SCROLLING_BOX_SIZE);
    boxB.SetProperty(Actor::Property::POSITION, Vector3(0.0f, -400.0f, 1.0f));
    Toolkit::PushButton scrollLargeButton = Toolkit::PushButton::New();
    scrollLargeButton.ClickedSignal().Connect(this, &TextScrollingExample::OnButtonClickedLarge);
    CreateLabel(mLargeLabel, "A Quick Brown Fox Jumps Over The Lazy Dog", boxB, false, scrollLargeButton);

    CreateBox("boxC", boxC, desktop, SCROLLING_BOX_SIZE);
    boxC.SetProperty(Actor::Property::POSITION, Vector3(0.0f, -300.0f, 1.0f));
    Toolkit::PushButton scrollSmallButton = Toolkit::PushButton::New();
    scrollSmallButton.ClickedSignal().Connect(this, &TextScrollingExample::OnButtonClickedSmall);
    CreateLabel(mSmallLabel, "Hello Text", boxC, true, scrollSmallButton);
    mSmallLabel.SetProperty(TextLabel::Property::TEXT_COLOR, Color::BLACK);
    Property::Map shadowMap;
    shadowMap.Insert("color", Color::CYAN);
    shadowMap.Insert("offset", Vector2(1.0f, 1.0f));
    mSmallLabel.SetProperty(TextLabel::Property::SHADOW, shadowMap);

    CreateBox("boxD", boxD, desktop, SCROLLING_BOX_SIZE);
    boxD.SetProperty(Actor::Property::POSITION, Vector3(0.0f, -200.0f, 1.0f));
    Toolkit::PushButton scrollRtlButton = Toolkit::PushButton::New();
    scrollRtlButton.ClickedSignal().Connect(this, &TextScrollingExample::OnButtonClickedRtl);
    CreateLabel(mRtlLabel, "مرحبا بالعالم", boxD, true, scrollRtlButton);
    mRtlLabel.SetProperty(TextLabel::Property::AUTO_SCROLL_STOP_MODE, TextLabel::AutoScrollStopMode::IMMEDIATE);
    mRtlLabel.SetProperty(TextLabel::Property::AUTO_SCROLL_LOOP_DELAY, 0.3f);

    CreateBox("boxE", boxE, desktop, SCROLLING_BOX_SIZE);
    boxE.SetProperty(Actor::Property::POSITION, Vector3(0.0f, -100.0f, 1.0f));
    Toolkit::PushButton scrollRtlLongButton = Toolkit::PushButton::New();
    scrollRtlLongButton.ClickedSignal().Connect(this, &TextScrollingExample::OnButtonClickedRtlLong);
    CreateLabel(mRtlLongLabel, " مرحبا بالعالم مرحبا بالعالم مرحبا بالعالم مرحبا بالعالم مرحبا بالعالم مرحبا بالعالم مرحبا بالعالم مرحبا بالعالم مرحبا بالعالم", boxE, false, scrollRtlLongButton);
    mRtlLongLabel.SetProperty(TextLabel::Property::AUTO_SCROLL_SPEED, 500);
    mRtlLongLabel.SetProperty(TextLabel::Property::AUTO_SCROLL_GAP, 500);
    mRtlLongLabel.SetProperty(TextLabel::Property::AUTO_SCROLL_LOOP_COUNT, 3);
    mRtlLongLabel.SetProperty(TextLabel::Property::AUTO_SCROLL_STOP_MODE, TextLabel::AutoScrollStopMode::FINISH_LOOP);

    mPanGestureDetector = PanGestureDetector::New();
    mPanGestureDetector.DetectedSignal().Connect(this, &TextScrollingExample::OnPanGesture);
    mPanGestureDetector.Attach(desktop);

    Toolkit::PushButton colorButton = Toolkit::PushButton::New();
    colorButton.SetProperty(Button::Property::TOGGLABLE, true);
    colorButton.SetProperty(Button::Property::UNSELECTED_BACKGROUND_VISUAL, Property::Map().Add(Toolkit::Visual::Property::TYPE, Visual::COLOR).Add(ColorVisual::Property::MIX_COLOR, Color::RED));
    colorButton.SetProperty(Button::Property::SELECTED_BACKGROUND_VISUAL, Property::Map().Add(Toolkit::Visual::Property::TYPE, Visual::COLOR).Add(ColorVisual::Property::MIX_COLOR, Color::BLACK));
    colorButton.SetProperty(Actor::Property::ANCHOR_POINT, AnchorPoint::BOTTOM_CENTER);
    colorButton.SetProperty(Actor::Property::PARENT_ORIGIN, ParentOrigin::BOTTOM_CENTER);
    colorButton.SetResizePolicy(ResizePolicy::FIXED, Dimension::ALL_DIMENSIONS);
    colorButton.SetProperty(Actor::Property::SIZE, Vector2(BOX_SIZE.height, BOX_SIZE.height));
    colorButton.ClickedSignal().Connect(this, &TextScrollingExample::OnColorButtonClicked);
    rootActor.Add(colorButton);

    for(unsigned int i = 0; i < ALIGNMENT_TABLE_COUNT; ++i)
    {
      Toolkit::RadioButton alignButton = Toolkit::RadioButton::New(ALIGNMENT_TABLE[i]);
      alignButton.ClickedSignal().Connect(this, &TextScrollingExample::OnAlignButtonClicked);
      alignButton.SetProperty(Dali::Actor::Property::NAME, ALIGNMENT_TABLE[i]);

      // Place first button to left aligned, second center aligned and third right aligned
      alignButton.SetProperty(Actor::Property::ANCHOR_POINT, Vector3(i * 0.5f, 0.0f, 0.5f));
      alignButton.SetProperty(Actor::Property::PARENT_ORIGIN, Vector3(i * 0.5f, 0.0f, 0.5f));

      rootActor.Add(alignButton);

      if(i == 0)
      {
        // Set the first button as selected
        alignButton.SetProperty(Button::Property::SELECTED, true);
      }
    }
  }

  void EnableScrolling(Labels labels)
  {
    Actor label;
    switch(labels)
    {
      case LARGE:
      {
        label = mLargeLabel;
        break;
      }
      case RTL:
      {
        label = mRtlLabel;
        break;
      }
      case SMALL:
      {
        label = mSmallLabel;
        break;
      }
      case RTL_LONG:
      {
        label = mRtlLongLabel;
        break;
      }
      case NONE:
      {
        return;
      }
    }

    if(labels != NONE)
    {
      Property::Value value = label.GetProperty(TextLabel::Property::ENABLE_AUTO_SCROLL);
      if(value.Get<bool>())
      {
        label.SetProperty(TextLabel::Property::ENABLE_AUTO_SCROLL, false);
      }
      else
      {
        label.SetProperty(TextLabel::Property::ENABLE_AUTO_SCROLL, true);
      }
    }
  }

  bool OnButtonClickedSmall(Toolkit::Button button)
  {
    EnableScrolling(SMALL);
    return true;
  }

  bool OnButtonClickedLarge(Toolkit::Button button)
  {
    EnableScrolling(LARGE);
    return true;
  }

  bool OnButtonClickedRtl(Toolkit::Button button)
  {
    EnableScrolling(RTL);
    return true;
  }

  bool OnButtonClickedRtlLong(Toolkit::Button button)
  {
    EnableScrolling(RTL_LONG);
    return true;
  }

  bool OnColorButtonClicked(Toolkit::Button button)
  {
    Vector4 color = Color::RED;

    if(mToggleColor)
    {
      color        = Color::BLACK;
      mToggleColor = false;
    }
    else
    {
      mToggleColor = true;
    }

    Property::Map shadowMap;
    shadowMap.Insert("color", Color::BLACK);
    mSmallLabel.SetProperty(TextLabel::Property::SHADOW, shadowMap);
    mSmallLabel.SetProperty(TextLabel::Property::TEXT_COLOR, color);
    mRtlLabel.SetProperty(TextLabel::Property::TEXT_COLOR, color);
    mLargeLabel.SetProperty(TextLabel::Property::TEXT_COLOR, color);
    mRtlLongLabel.SetProperty(TextLabel::Property::TEXT_COLOR, color);

    return true;
  }

  bool OnAlignButtonClicked(Toolkit::Button button)
  {
    for(unsigned int index = 0; index < ALIGNMENT_TABLE_COUNT; ++index)
    {
      const std::string& buttonName = button.GetProperty<std::string>(Dali::Actor::Property::NAME);
      if(buttonName == ALIGNMENT_TABLE[index])
      {
        mSmallLabel.SetProperty(TextLabel::Property::HORIZONTAL_ALIGNMENT, ALIGNMENT_TABLE[index]);
        mRtlLabel.SetProperty(TextLabel::Property::HORIZONTAL_ALIGNMENT, ALIGNMENT_TABLE[index]);
        mLargeLabel.SetProperty(TextLabel::Property::HORIZONTAL_ALIGNMENT, ALIGNMENT_TABLE[index]);
        mRtlLongLabel.SetProperty(TextLabel::Property::HORIZONTAL_ALIGNMENT, ALIGNMENT_TABLE[index]);
        break;
      }
    }

    return true;
  }

  /**
   * Main key event handler
   */
  void OnKeyEvent(const KeyEvent& event)
  {
    if(event.GetState() == KeyEvent::DOWN)
    {
      if(IsKey(event, DALI_KEY_ESCAPE) || IsKey(event, DALI_KEY_BACK))
      {
        mApplication.Quit();
      }
      else
      {
        if(event.GetKeyName() == "2")
        {
          mAnimation.AnimateTo(Property(mSmallLabel, Actor::Property::SCALE), Vector3(1.2f, 1.2f, 0.0f), AlphaFunction::BOUNCE, TimePeriod(1.0f, 1.0f));
          mAnimation.AnimateTo(Property(mLargeLabel, Actor::Property::SCALE), Vector3(1.2f, 1.2f, 0.0f), AlphaFunction::BOUNCE, TimePeriod(1.0f, 1.0f));
          mAnimation.AnimateTo(Property(mRtlLabel, Actor::Property::SCALE), Vector3(1.2f, 1.2f, 0.0f), AlphaFunction::BOUNCE, TimePeriod(1.0f, 1.0f));
          mAnimation.AnimateTo(Property(mRtlLongLabel, Actor::Property::SCALE), Vector3(1.2f, 1.2f, 0.0f), AlphaFunction::BOUNCE, TimePeriod(1.0f, 1.0f));

          mAnimation.Play();
        }
      }
    }
  }

  void OnPanGesture(Actor actor, const PanGesture& gesture)
  {
    if(gesture.GetState() == GestureState::CONTINUING)
    {
      mTargetActorPosition.y = mTargetActorPosition.y + gesture.GetDisplacement().y;
      mTargetActorPosition.y = std::min(mTargetActorPosition.y, -mTargetActorSize.height);
      mTargetActorPosition.y = std::max(mTargetActorPosition.y, (mTargetActorSize.height - mWindowSize.height * 0.25f));
      actor.SetProperty(Actor::Property::POSITION, Vector2(0.0f, mTargetActorPosition.y));
    }
  }

private:
  Application&       mApplication;
  PanGestureDetector mPanGestureDetector;

  Vector2 mTargetActorPosition;
  Vector2 mTargetActorSize;
  Vector2 mWindowSize;

  TextLabel mLargeLabel;
  TextLabel mSmallLabel;
  TextLabel mRtlLabel;
  TextLabel mRtlLongLabel;

  Animation mAnimation;

  bool mToggleColor;
};

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