/*
 * 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.
 *
 */

// EXTERNAL INCLUDES
#include <dali-toolkit/dali-toolkit.h>
#include <dali/devel-api/actors/actor-devel.h>
#include <iostream>
#include <sstream>

#include <dali-toolkit/devel-api/controls/table-view/table-view.h>
#include <dali-toolkit/devel-api/visual-factory/visual-factory.h>

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

namespace
{
enum IconType
{
  IMAGEVIEW,
  CHECKBOX
};

const char* IMAGE_PATH_PREFIX(DEMO_IMAGE_DIR "application-icon-");
const char* IMAGE_PATH_POSTFIX(".png");
const int   TOTAL_ICON_DEFINITIONS(147);

const char* BACKGROUND_IMAGE(DEMO_IMAGE_DIR "background-3.jpg");
const float PAGE_SCALE_FACTOR_X(0.95f);
const float PAGE_SCALE_FACTOR_Y(0.95f);
const float PAGE_DURATION_SCALE_FACTOR(10.0f); ///< Time-scale factor, larger = animation is slower

const float    DEFAULT_OPT_ROW_COUNT(5);
const float    DEFAULT_OPT_COL_COUNT(4);
const float    DEFAULT_OPT_PAGE_COUNT(10);
const bool     DEFAULT_OPT_USE_TABLEVIEW(true);
const bool     DEFAULT_OPT_ICON_LABELS(true);
const IconType DEFAULT_OPT_ICON_TYPE(IMAGEVIEW);
const bool     DEFAULT_OPT_USE_TEXT_LABEL(false);

// The image/label area tries to make sure the positioning will be relative to previous sibling
const float IMAGE_AREA(0.60f);
const float LABEL_AREA(0.50f);

/**
 * Random words used as unique application names.
 * The number matches the value of TOTAL_ICON_DEFINITIONS.
 */
const char* DEMO_APPS_NAMES[] =
  {
    "Achdyer", "Aughm", "Cerl", "Daril", "Emgha", "Ghatan", "Issum", "Lertan", "Mosorrad", "Achtortor", "Aughtheryer", "Certin", "Darpban", "Emiton", "Gibanis", "Itenthbel", "Liadem", "Mosraye", "Ackirlor", "Awitad", "Checerper", "Dasrad", "Emworeng", "Hatdyn", "K'ackves", "Liathar", "Mosth", "Ackptin", "Banengon", "Chegit", "Deeqskel", "Endnys", "Heesban", "Kagdra", "Liephden", "Neabar", "Aighte", "Banhinat", "Cheirat", "Delurnther", "Enessray", "Hesub", "Kalbankim", "Likellor", "Neerdem", "Akala", "Belrisash", "Che'rak", "Denalda", "Engyer", "Hinkelenth", "Kal'enda", "Loightmos", "Nichqua", "Alealdny", "Bilorm", "Cheves", "Derynkel", "En'rady", "Hirryer", "Kimest", "Loromum", "Nudraough", "Angash", "Bleustcer", "Chiperath", "Deurnos", "Enthount", "Ideinta", "Kimundeng", "Lorr", "Nuyim", "Anglor", "Bliagelor", "Chralerack", "Doyaryke", "Enundem", "Im'eld", "Koachlor", "Lortas", "Nycha", "Anveraugh", "Blorynton", "Chram", "Draithon", "Essina", "Ina'ir", "Kuren", "Lyerr", "Nyia", "Ardangas", "Booten", "Clyimen", "Drantess", "Faughald", "Ing'moro", "Kygver", "Maustbur", "Nyjac", "Ardug", "Bripolqua", "Coqueang", "Druardny", "Fiummos", "Ingormess", "Kyning", "Menvor", "Nystondar", "Ardworu", "Bryray", "Craennther", "Dynsaytor", "Garash", "Ingshy", "Laiyach", "Meusten", "Okine", "Ascerald", "Burust", "Cykage", "Dytinris", "Garight", "Issath", "Lasuzu", "Mirodskel", "Oldit", "Ash'ach", "Cataikel", "Dalek", "Eeni", "Garrynath", "Issendris", "Lekew", "Morhatrod", "Om'mose", "Athiund", "Cerilwar", "Darhkel", "Elmryn", "Ghalora", "Issey", "Lerengom", "Moserbel", "Onye", "Ososrak", "Pecertin", "Perrd"};

// This code comes from command-line-options.cpp. the reason it's here is to
// keep consistent the extra-help formatting when '--help' used.
void PrintHelp(const char* const opt, const char* const optDescription)
{
  const std::ios_base::fmtflags flags = std::cout.flags();
  std::cout << std::left << "  -";
  std::cout.width(18);
  std::cout << opt;
  std::cout << optDescription;
  std::cout << std::endl;
  std::cout.flags(flags);
}

} // namespace

/**
 * @brief This example is a benchmark that mimics the paged applications list of the homescreen application.
 */
class HomescreenBenchmark : public ConnectionTracker
{
public:
  // Config structure passed to the constructor. It makes easier to increase number
  // of setup parameters if needed.
  struct Config
  {
    Config()
    : mRows(DEFAULT_OPT_ROW_COUNT),
      mCols(DEFAULT_OPT_COL_COUNT),
      mPageCount(DEFAULT_OPT_PAGE_COUNT),
      mTableViewEnabled(DEFAULT_OPT_USE_TABLEVIEW),
      mIconLabelsEnabled(DEFAULT_OPT_ICON_LABELS),
      mIconType(DEFAULT_OPT_ICON_TYPE),
      mUseTextLabel(DEFAULT_OPT_USE_TEXT_LABEL)
    {
    }

    int      mRows;
    int      mCols;
    int      mPageCount;
    bool     mTableViewEnabled;
    bool     mIconLabelsEnabled;
    IconType mIconType;
    bool     mUseTextLabel;
  };

  // animation script data
  struct ScriptData
  {
    ScriptData(int pages, float duration, bool flick)
    : mPages(pages),
      mDuration(duration),
      mFlick(flick)
    {
    }

    int   mPages;    ///< Number of pages to scroll
    float mDuration; ///< Duration
    bool  mFlick;    ///< Use flick or 'one-by-one' scroll
  };

  HomescreenBenchmark(Application& application, const Config& config)
  : mApplication(application),
    mConfig(config),
    mScriptFrame(0),
    mCurrentPage(0)
  {
    // Connect to the Application's Init signal.
    mApplication.InitSignal().Connect(this, &HomescreenBenchmark::Create);
  }

  ~HomescreenBenchmark()
  {
  }

  // The Init signal is received once (only) during the Application lifetime.
  void Create(Application& application)
  {
    // Create benchmark script
    CreateScript();

    // Get a handle to the window
    Window window = application.GetWindow();

    mScrollParent = Actor::New();
    mScrollParent.SetResizePolicy(ResizePolicy::FILL_TO_PARENT, Dimension::ALL_DIMENSIONS);
    mScrollParent.SetProperty(Actor::Property::ANCHOR_POINT, AnchorPoint::CENTER);
    mScrollParent.SetProperty(Actor::Property::PARENT_ORIGIN, ParentOrigin::CENTER);

    // create background
    Toolkit::ImageView background = Toolkit::ImageView::New(BACKGROUND_IMAGE);
    window.Add(background);
    background.SetResizePolicy(ResizePolicy::FILL_TO_PARENT, Dimension::ALL_DIMENSIONS);
    background.SetProperty(Actor::Property::ANCHOR_POINT, AnchorPoint::CENTER);
    background.SetProperty(Actor::Property::PARENT_ORIGIN, ParentOrigin::CENTER);

    PopulatePages();

    window.Add(mScrollParent);

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

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

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

  Actor AddPage()
  {
    // Create root page actor.
    Toolkit::Control pageActor;

    if(mConfig.mTableViewEnabled)
    {
      pageActor = Toolkit::TableView::New(mConfig.mRows, mConfig.mCols);
    }
    else
    {
      pageActor = Toolkit::Control::New();
    }

    pageActor.SetBackgroundColor(Vector4(0.0f, 0.0f, 0.0f, 0.5f));
    pageActor.SetProperty(Actor::Property::PARENT_ORIGIN, ParentOrigin::CENTER);
    pageActor.SetProperty(Actor::Property::ANCHOR_POINT, AnchorPoint::CENTER);
    pageActor.SetResizePolicy(ResizePolicy::SIZE_RELATIVE_TO_PARENT, Dimension::ALL_DIMENSIONS);
    pageActor.SetProperty(Actor::Property::SIZE_MODE_FACTOR, Vector3(PAGE_SCALE_FACTOR_X, PAGE_SCALE_FACTOR_Y, 1.0f));
    return pageActor;
  }

  Toolkit::ImageView CreateImageView(const unsigned int currentIconIndex)
  {
    // Create empty image to avoid early renderer creation
    Toolkit::ImageView imageView = Toolkit::ImageView::New();

    // Auto-generate the Icons image URL.
    Property::Map     map;
    std::stringstream imagePath;
    imagePath << IMAGE_PATH_PREFIX << currentIconIndex << IMAGE_PATH_POSTFIX;
    map[Dali::Toolkit::ImageVisual::Property::URL] = imagePath.str();

    imageView.SetProperty(Toolkit::ImageView::Property::IMAGE, map);
    imageView.SetResizePolicy(ResizePolicy::SIZE_RELATIVE_TO_PARENT, Dimension::ALL_DIMENSIONS);
    imageView.SetProperty(Actor::Property::SIZE_SCALE_POLICY, SizeScalePolicy::FIT_WITH_ASPECT_RATIO);
    imageView.SetProperty(Actor::Property::ANCHOR_POINT, AnchorPoint::CENTER);
    imageView.SetProperty(Actor::Property::PARENT_ORIGIN, ParentOrigin::CENTER);
    imageView.SetProperty(Actor::Property::SIZE_MODE_FACTOR, Vector3(IMAGE_AREA, IMAGE_AREA, 1.0f));

    return imageView;
  }

  Toolkit::Button CreateButton(const unsigned int currentIconIndex)
  {
    Toolkit::CheckBoxButton button = Toolkit::CheckBoxButton::New();
    button.SetResizePolicy(ResizePolicy::SIZE_RELATIVE_TO_PARENT, Dimension::ALL_DIMENSIONS);
    button.SetProperty(Actor::Property::SIZE_SCALE_POLICY, SizeScalePolicy::FIT_WITH_ASPECT_RATIO);
    button.SetProperty(Actor::Property::ANCHOR_POINT, AnchorPoint::CENTER);
    button.SetProperty(Actor::Property::PARENT_ORIGIN, ParentOrigin::CENTER);
    button.SetProperty(Toolkit::Button::Property::SELECTED, (currentIconIndex % 2 == 0)); // Select half the button

    return button;
  }

  void AddIconsToPage(Actor page, bool useTextLabel)
  {
    Window window = mApplication.GetWindow();

    Size        windowSize(window.GetSize());
    const float scaledHeight = windowSize.y * PAGE_SCALE_FACTOR_Y;
    const float scaledWidth  = windowSize.x * PAGE_SCALE_FACTOR_X;
    const float PADDING      = windowSize.y / 64.0f;
    const float ROW_HEIGHT   = (scaledHeight - (PADDING * 2.0f)) / static_cast<float>(mConfig.mRows);
    const float COL_WIDTH    = (scaledWidth - (PADDING * 2.0f)) / static_cast<float>(mConfig.mCols);

    Vector2 dpi = window.GetDpi();

    static int currentIconIndex = 0;

    for(int y = 0; y < mConfig.mRows; ++y)
    {
      for(int x = 0; x < mConfig.mCols; ++x)
      {
        // Create parent icon view
        Toolkit::Control iconView = Toolkit::Control::New();
        iconView.SetProperty(Actor::Property::ANCHOR_POINT, AnchorPoint::TOP_LEFT);
        iconView.SetProperty(Actor::Property::PARENT_ORIGIN, ParentOrigin::TOP_LEFT);

        if(!mConfig.mTableViewEnabled)
        {
          float rowX = x * COL_WIDTH + PADDING;
          float rowY = y * ROW_HEIGHT + PADDING;
          iconView.SetProperty(Actor::Property::SIZE, Vector3(COL_WIDTH, ROW_HEIGHT, 1.0f));
          iconView.SetProperty(Actor::Property::POSITION, Vector3(rowX, rowY, 0.0f));
        }
        else
        {
          iconView.SetResizePolicy(ResizePolicy::SIZE_RELATIVE_TO_PARENT, Dimension::ALL_DIMENSIONS);
          iconView.SetProperty(Actor::Property::SIZE_SCALE_POLICY, SizeScalePolicy::FIT_WITH_ASPECT_RATIO);
        }

        Actor icon;

        switch(mConfig.mIconType)
        {
          case CHECKBOX:
          {
            icon = CreateButton(currentIconIndex);
            break;
          }
          case IMAGEVIEW:
          {
            icon = CreateImageView(currentIconIndex);
            break;
          }
        }

        if(mConfig.mIconLabelsEnabled)
        {
          // create label
          if(useTextLabel)
          {
            Toolkit::TextLabel textLabel = Toolkit::TextLabel::New(DEMO_APPS_NAMES[currentIconIndex]);
            textLabel.SetProperty(Actor::Property::ANCHOR_POINT, AnchorPoint::TOP_CENTER);
            textLabel.SetProperty(Actor::Property::PARENT_ORIGIN, ParentOrigin::BOTTOM_CENTER);
            textLabel.SetResizePolicy(ResizePolicy::USE_NATURAL_SIZE, Dimension::ALL_DIMENSIONS);
            textLabel.SetProperty(Toolkit::TextLabel::Property::TEXT_COLOR, Vector4(1.0f, 1.0f, 1.0f, 1.0f)); // White.
            textLabel.SetProperty(Toolkit::TextLabel::Property::POINT_SIZE, ((static_cast<float>(ROW_HEIGHT * LABEL_AREA) * 72.0f) / dpi.y) * 0.25f);
            textLabel.SetProperty(Toolkit::TextLabel::Property::HORIZONTAL_ALIGNMENT, "CENTER");
            textLabel.SetProperty(Toolkit::TextLabel::Property::VERTICAL_ALIGNMENT, "TOP");
            icon.Add(textLabel);
          }
          else
          {
            Property::Map map;
            map.Add(Toolkit::Visual::Property::TYPE, Toolkit::Visual::TEXT).Add(Toolkit::TextVisual::Property::TEXT, DEMO_APPS_NAMES[currentIconIndex]).Add(Toolkit::TextVisual::Property::TEXT_COLOR, Color::WHITE).Add(Toolkit::TextVisual::Property::POINT_SIZE, ((static_cast<float>(ROW_HEIGHT * LABEL_AREA) * 72.0f) / dpi.y) * 0.25f).Add(Toolkit::TextVisual::Property::HORIZONTAL_ALIGNMENT, "CENTER").Add(Toolkit::TextVisual::Property::VERTICAL_ALIGNMENT, "TOP");

            Toolkit::Control control = Toolkit::Control::New();
            control.SetProperty(Toolkit::Control::Property::BACKGROUND, map);
            control.SetProperty(Actor::Property::ANCHOR_POINT, AnchorPoint::TOP_CENTER);
            control.SetProperty(Actor::Property::PARENT_ORIGIN, ParentOrigin::BOTTOM_CENTER);
            icon.Add(control);
          }
        }

        iconView.Add(icon);
        page.Add(iconView);

        // We only have images and names for a certain number of icons.
        // Wrap around if we have used them all.
        if(++currentIconIndex == TOTAL_ICON_DEFINITIONS)
        {
          currentIconIndex = 0;
        }
      }
    }
  }

  void CreateScript()
  {
    const int lastPage = mConfig.mPageCount - 1;
    const int halfA    = lastPage / 2;
    const int halfB    = lastPage / 2 + lastPage % 2;
    mScriptFrameData.push_back(ScriptData(lastPage, 1.5f, true));
    mScriptFrameData.push_back(ScriptData(-lastPage, 1.5f, true));
    mScriptFrameData.push_back(ScriptData(halfA, 1.0f, true));
    mScriptFrameData.push_back(ScriptData(halfB, 1.0f, true));
    mScriptFrameData.push_back(ScriptData(-lastPage, 0.5f, false));
    mScriptFrameData.push_back(ScriptData(halfA, 0.5f, false));
    mScriptFrameData.push_back(ScriptData(halfB, 1.0f, true));
    mScriptFrameData.push_back(ScriptData(-halfA, 1.0f, true));
    mScriptFrameData.push_back(ScriptData(1, 0.1f, true));
    mScriptFrameData.push_back(ScriptData(-1, 0.1f, true));
    mScriptFrameData.push_back(ScriptData(1, 0.1f, true));
    mScriptFrameData.push_back(ScriptData(-1, 0.1f, true));
    mScriptFrameData.push_back(ScriptData(1, 0.1f, true));
    mScriptFrameData.push_back(ScriptData(-1, 0.1f, true));
    mScriptFrameData.push_back(ScriptData(halfA, 1.0f, true));
  }

  void PopulatePages()
  {
    Vector3 windowSize(mApplication.GetWindow().GetSize());

    for(int i = 0; i < mConfig.mPageCount; ++i)
    {
      // Create page.
      Actor page = AddPage();

      // Populate icons.
      AddIconsToPage(page, mConfig.mUseTextLabel);

      // Move page 'a little bit up'.
      page.SetProperty(Actor::Property::PARENT_ORIGIN, ParentOrigin::CENTER);
      page.SetProperty(Actor::Property::ANCHOR_POINT, AnchorPoint::CENTER);
      page.SetProperty(Actor::Property::POSITION, Vector3(windowSize.x * i, 0.0f, 0.0f));
      mScrollParent.Add(page);
    }

    mScrollParent.SetProperty(Actor::Property::OPACITY, 1.0f);
    mScrollParent.SetProperty(Actor::Property::SCALE, Vector3::ONE);

    // Fade in.
    ShowAnimation();
  }

  void ShowAnimation()
  {
    mShowAnimation = Animation::New(1.0f);
    mShowAnimation.AnimateTo(Property(mScrollParent, Actor::Property::COLOR_ALPHA), 1.0f, AlphaFunction::EASE_IN_OUT);
    mShowAnimation.AnimateTo(Property(mScrollParent, Actor::Property::SCALE), Vector3::ONE, AlphaFunction::EASE_IN_OUT);
    mShowAnimation.FinishedSignal().Connect(this, &HomescreenBenchmark::OnAnimationEnd);
    mShowAnimation.Play();
  }

  void ScrollPages(int pages, float duration, bool flick)
  {
    duration *= PAGE_DURATION_SCALE_FACTOR;
    Vector3 windowSize(mApplication.GetWindow().GetSize());
    mScrollAnimation = Animation::New(duration);
    if(flick)
    {
      mScrollAnimation.AnimateBy(Property(mScrollParent, Actor::Property::POSITION), Vector3(-windowSize.x * pages, 0.0f, 0.0f), AlphaFunction::EASE_IN_OUT);
    }
    else
    {
      int totalPages = abs(pages);
      for(int i = 0; i < totalPages; ++i)
      {
        mScrollAnimation.AnimateBy(Property(mScrollParent, Actor::Property::POSITION), Vector3(pages < 0 ? windowSize.x : -windowSize.x, 0.0f, 0.0f), AlphaFunction::EASE_IN_OUT, TimePeriod(duration * i, duration));
      }
    }
    mScrollAnimation.FinishedSignal().Connect(this, &HomescreenBenchmark::OnAnimationEnd);
    mScrollAnimation.Play();
    mCurrentPage += pages;
  }

  void OnAnimationEnd(Animation& source)
  {
    if(mScriptFrame < mScriptFrameData.size())
    {
      ScriptData& frame = mScriptFrameData[mScriptFrame];
      ScrollPages(frame.mPages, frame.mDuration, frame.mFlick);
      ++mScriptFrame;
    }
    else
    {
      mApplication.Quit();
    }
  }

  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;
  Actor                   mScrollParent;
  Animation               mShowAnimation;
  Animation               mScrollAnimation;
  Config                  mConfig;
  std::vector<ScriptData> mScriptFrameData;
  size_t                  mScriptFrame;
  int                     mCurrentPage;
};

int DALI_EXPORT_API main(int argc, char** argv)
{
  // Default settings.
  HomescreenBenchmark::Config config;

  bool printHelpAndExit = false;

  for(int i = 1; i < argc; ++i)
  {
    std::string arg(argv[i]);
    if(arg.compare(0, 2, "-r") == 0)
    {
      config.mRows = atoi(arg.substr(2).c_str());
    }
    else if(arg.compare(0, 2, "-c") == 0)
    {
      config.mCols = atoi(arg.substr(2).c_str());
    }
    else if(arg.compare(0, 2, "-p") == 0)
    {
      config.mPageCount = atoi(arg.substr(2).c_str());
    }
    else if(arg.compare("--disable-tableview") == 0)
    {
      config.mTableViewEnabled = false;
    }
    else if(arg.compare("--disable-icon-labels") == 0)
    {
      config.mIconLabelsEnabled = false;
    }
    else if(arg.compare("--use-checkbox") == 0)
    {
      config.mIconType = CHECKBOX;
    }
    else if(arg.compare("--use-text-label") == 0)
    {
      config.mUseTextLabel = true;
    }
    else if(arg.compare("--help") == 0)
    {
      printHelpAndExit = true;
    }
  }

  Application         application = Application::New(&argc, &argv);
  HomescreenBenchmark test(application, config);

  if(printHelpAndExit)
  {
    PrintHelp("c<num>", " Number of columns");
    PrintHelp("r<num>", " Number of rows");
    PrintHelp("p<num>", " Number of pages ( must be greater than 1 )");
    PrintHelp("-disable-tableview", " Disables the use of TableView for layouting");
    PrintHelp("-disable-icon-labels", " Disables labels for each icon");
    PrintHelp("-use-checkbox", " Uses checkboxes for icons");
    PrintHelp("-use-text-label", " Uses TextLabel instead of a TextVisual");
    return 0;
  }

  application.MainLoop();

  return 0;
}