#include "fullcolorbrushtool.h"

// TnzTools includes
#include "tools/tool.h"
#include "tools/cursors.h"
#include "tools/toolutils.h"
#include "tools/toolhandle.h"
#include "tools/tooloptions.h"

#include "bluredbrush.h"

// TnzQt includes
#include "toonzqt/dvdialog.h"

// TnzLib includes
#include "toonz/tpalettehandle.h"
#include "toonz/txsheethandle.h"
#include "toonz/txshlevelhandle.h"
#include "toonz/tobjecthandle.h"
#include "toonz/ttileset.h"
#include "toonz/ttilesaver.h"
#include "toonz/strokegenerator.h"
#include "toonz/tstageobject.h"
#include "toonz/palettecontroller.h"

// TnzCore includes
#include "tgl.h"
#include "tproperty.h"
#include "trasterimage.h"
#include "tenv.h"
#include "tpalette.h"
#include "trop.h"
#include "tstream.h"
#include "tstroke.h"
#include "timagecache.h"

// Qt includes
#include <QCoreApplication>  // Qt translation support

//----------------------------------------------------------------------------------

TEnv::IntVar FullcolorBrushMinSize("FullcolorBrushMinSize", 1);
TEnv::IntVar FullcolorBrushMaxSize("FullcolorBrushMaxSize", 5);
TEnv::IntVar FullcolorPressureSensitivity("FullcolorPressureSensitivity", 1);
TEnv::DoubleVar FullcolorBrushHardness("FullcolorBrushHardness", 100);
TEnv::DoubleVar FullcolorMinOpacity("FullcolorMinOpacity", 100);
TEnv::DoubleVar FullcolorMaxOpacity("FullcolorMaxOpacity", 100);

//----------------------------------------------------------------------------------

#define CUSTOM_WSTR L"<custom>"

//----------------------------------------------------------------------------------

namespace {

int computeThickness(int pressure, const TIntPairProperty &property,
                     bool isPath = false) {
  if (isPath) return 0.0;
  double p   = pressure / 255.0;
  double t   = p * p * p;
  int thick0 = property.getValue().first;
  int thick1 = property.getValue().second;
  return tround(thick0 + (thick1 - thick0) * t);
}

//----------------------------------------------------------------------------------

double computeThickness(int pressure, const TDoublePairProperty &property,
                        bool isPath = false) {
  if (isPath) return 0.0;
  double p                    = pressure / 255.0;
  double t                    = p * p * p;
  double thick0               = property.getValue().first;
  double thick1               = property.getValue().second;
  if (thick1 < 0.0001) thick0 = thick1 = 0.0;
  return (thick0 + (thick1 - thick0) * t);
}

//----------------------------------------------------------------------------------

class FullColorBrushUndo final : public ToolUtils::TFullColorRasterUndo {
  TPoint m_offset;
  QString m_id;

public:
  FullColorBrushUndo(TTileSetFullColor *tileSet, TXshSimpleLevel *level,
                     const TFrameId &frameId, bool isFrameCreated,
                     const TRasterP &ras, const TPoint &offset)
      : ToolUtils::TFullColorRasterUndo(tileSet, level, frameId, isFrameCreated,
                                        false, 0)
      , m_offset(offset) {
    static int counter = 0;

    m_id = QString("FullColorBrushUndo") + QString::number(counter++);
    TImageCache::instance()->add(m_id.toStdString(), TRasterImageP(ras));
  }

  ~FullColorBrushUndo() { TImageCache::instance()->remove(m_id); }

  void redo() const override {
    insertLevelAndFrameIfNeeded();

    TRasterImageP image = getImage();
    TRasterP ras        = image->getRaster();

    TRasterImageP srcImg =
        TImageCache::instance()->get(m_id.toStdString(), false);
    ras->copy(srcImg->getRaster(), m_offset);

    TTool::getApplication()->getCurrentXsheet()->notifyXsheetChanged();
    notifyImageChanged();
  }

  int getSize() const override {
    return sizeof(*this) + ToolUtils::TFullColorRasterUndo::getSize();
  }

  QString getToolName() override { return QString("Raster Brush Tool"); }
  int getHistoryType() override { return HistoryType::BrushTool; }
};

}  // namespace

//************************************************************************
//    FullColor Brush Tool implementation
//************************************************************************

FullColorBrushTool::FullColorBrushTool(std::string name)
    : TTool(name)
    , m_thickness("Size", 1, 100, 1, 5, false)
    , m_pressure("Pressure", true)
    , m_opacity("Opacity", 0, 100, 100, 100, true)
    , m_hardness("Hardness:", 0, 100, 100)
    , m_preset("Preset:")
    , m_styleId(0)
    , m_oldOpacity(1)
    , m_brush(0)
    , m_tileSet(0)
    , m_tileSaver(0)
    , m_notifier(0)
    , m_presetsLoaded(false)
    , m_firstTime(true) {
  bind(TTool::RasterImage | TTool::EmptyTarget);

  m_prop.bind(m_thickness);
  m_prop.bind(m_hardness);
  m_prop.bind(m_opacity);
  m_prop.bind(m_pressure);
  m_prop.bind(m_preset);
  m_preset.setId("BrushPreset");
}

//---------------------------------------------------------------------------------------------------

ToolOptionsBox *FullColorBrushTool::createOptionsBox() {
  TPaletteHandle *currPalette =
      TTool::getApplication()->getPaletteController()->getCurrentLevelPalette();
  ToolHandle *currTool = TTool::getApplication()->getCurrentTool();
  return new BrushToolOptionsBox(0, this, currPalette, currTool);
}

//---------------------------------------------------------------------------------------------------

void FullColorBrushTool::onCanvasSizeChanged() {
  onDeactivate();
  setWorkAndBackupImages();
}

//---------------------------------------------------------------------------------------------------

void FullColorBrushTool::updateTranslation() {
  m_thickness.setQStringName(tr("Size"));
  m_pressure.setQStringName(tr("Pressure"));
  m_opacity.setQStringName(tr("Opacity"));
  m_hardness.setQStringName(tr("Hardness:"));
  m_preset.setQStringName(tr("Preset:"));
}

//---------------------------------------------------------------------------------------------------

void FullColorBrushTool::onActivate() {
  if (!m_notifier) m_notifier = new FullColorBrushToolNotifier(this);

  updateCurrentColor();

  if (m_firstTime) {
    m_firstTime = false;
    m_thickness.setValue(
        TIntPairProperty::Value(FullcolorBrushMinSize, FullcolorBrushMaxSize));
    m_pressure.setValue(FullcolorPressureSensitivity ? 1 : 0);
    m_opacity.setValue(
        TDoublePairProperty::Value(FullcolorMinOpacity, FullcolorMaxOpacity));
    m_hardness.setValue(FullcolorBrushHardness);
  }

  m_brushPad = ToolUtils::getBrushPad(m_thickness.getValue().second,
                                      m_hardness.getValue() * 0.01);
  setWorkAndBackupImages();
}

//--------------------------------------------------------------------------------------------------

void FullColorBrushTool::onDeactivate() {
  if (m_mousePressed) leftButtonUp(m_mousePos, m_mouseEvent);
  m_workRaster = TRaster32P();
  m_backUpRas  = TRasterP();
}

//--------------------------------------------------------------------------------------------------

void FullColorBrushTool::updateWorkAndBackupRasters(const TRect &rect) {
  TRasterImageP ri = TImageP(getImage(false, 1));
  if (!ri) return;

  TRasterP ras = ri->getRaster();

  TRect _rect     = rect * ras->getBounds();
  TRect _lastRect = m_lastRect * ras->getBounds();

  if (_rect.isEmpty()) return;

  if (m_lastRect.isEmpty()) {
    m_workRaster->extract(_rect)->clear();
    m_backUpRas->extract(_rect)->copy(ras->extract(_rect));
    return;
  }

  QList<TRect> rects = ToolUtils::splitRect(_rect, _lastRect);
  for (int i = 0; i < rects.size(); i++) {
    m_workRaster->extract(rects[i])->clear();
    m_backUpRas->extract(rects[i])->copy(ras->extract(rects[i]));
  }
}

//--------------------------------------------------------------------------------------------------

bool FullColorBrushTool::preLeftButtonDown() {
  touchImage();

  if (m_isFrameCreated) setWorkAndBackupImages();

  return true;
}

//---------------------------------------------------------------------------------------------------

void FullColorBrushTool::leftButtonDown(const TPointD &pos,
                                        const TMouseEvent &e) {
  m_brushPos = m_mousePos = pos;
  m_mousePressed          = true;
  m_mouseEvent            = e;
  Viewer *viewer          = getViewer();
  if (!viewer) return;

  TRasterImageP ri = (TRasterImageP)getImage(true);
  if (!ri) ri      = (TRasterImageP)touchImage();

  if (!ri) return;

  /* update color here since the current style might be switched with numpad
   * shortcut keys */
  updateCurrentColor();

  TRasterP ras   = ri->getRaster();
  TDimension dim = ras->getSize();

  if (!(m_workRaster && m_backUpRas)) setWorkAndBackupImages();

  m_workRaster->lock();

  double maxThick  = m_thickness.getValue().second;
  double thickness = m_pressure.getValue()
                         ? computeThickness(e.m_pressure, m_thickness)
                         : maxThick;
  double opacity =
      (m_pressure.getValue() ? computeThickness(e.m_pressure, m_opacity)
                             : m_opacity.getValue().second) *
      0.01;
  TPointD rasCenter = TPointD(dim.lx * 0.5, dim.ly * 0.5);
  TThickPoint point(pos + rasCenter, thickness);
  TPointD halfThick(maxThick * 0.5, maxThick * 0.5);
  TRectD invalidateRect(pos - halfThick, pos + halfThick);

  m_points.clear();
  m_points.push_back(point);

  m_tileSet       = new TTileSetFullColor(ras->getSize());
  m_tileSaver     = new TTileSaverFullColor(ras, m_tileSet);
  double hardness = m_hardness.getValue() * 0.01;

  m_brush =
      new BluredBrush(m_workRaster, maxThick, m_brushPad, hardness == 1.0);
  m_strokeRect = m_brush->getBoundFromPoints(m_points);
  updateWorkAndBackupRasters(m_strokeRect);
  m_tileSaver->save(m_strokeRect);
  m_brush->addPoint(point, opacity);
  m_brush->updateDrawing(ras, m_backUpRas, m_currentColor, m_strokeRect,
                         m_opacity.getValue().second * 0.01);
  m_oldOpacity = opacity;
  m_lastRect   = m_strokeRect;

  invalidate(invalidateRect.enlarge(2));
}

//-------------------------------------------------------------------------------------------------------------

void FullColorBrushTool::leftButtonDrag(const TPointD &pos,
                                        const TMouseEvent &e) {
  m_brushPos = m_mousePos = pos;
  m_mouseEvent            = e;
  TRasterImageP ri        = (TRasterImageP)getImage(true);
  if (!ri) return;

  double maxThickness = m_thickness.getValue().second;
  double thickness    = m_pressure.getValue()
                         ? computeThickness(e.m_pressure, m_thickness)
                         : maxThickness;
  double opacity =
      (m_pressure.getValue() ? computeThickness(e.m_pressure, m_opacity)
                             : m_opacity.getValue().second) *
      0.01;
  TDimension size   = m_workRaster->getSize();
  TPointD rasCenter = TPointD(size.lx * 0.5, size.ly * 0.5);
  TThickPoint point(pos + rasCenter, thickness);

  TThickPoint old = m_points.back();
  if (norm2(point - old) < 4) return;

  TThickPoint mid((old + point) * 0.5, (point.thick + old.thick) * 0.5);
  m_points.push_back(mid);
  m_points.push_back(point);

  TRect bbox;
  int m = m_points.size();
  TRectD invalidateRect;
  if (m == 3) {
    // ho appena cominciato. devo disegnare un segmento
    TThickPoint pa = m_points.front();
    std::vector<TThickPoint> points;
    points.push_back(pa);
    points.push_back(mid);
    invalidateRect = ToolUtils::getBounds(points, maxThickness);
    bbox           = m_brush->getBoundFromPoints(points);
    updateWorkAndBackupRasters(bbox + m_lastRect);
    m_tileSaver->save(bbox);
    m_brush->addArc(pa, (pa + mid) * 0.5, mid, m_oldOpacity, opacity);
    m_lastRect += bbox;
  } else {
    // caso generale: disegno un arco
    std::vector<TThickPoint> points;
    points.push_back(m_points[m - 4]);
    points.push_back(old);
    points.push_back(mid);
    invalidateRect = ToolUtils::getBounds(points, maxThickness);
    bbox           = m_brush->getBoundFromPoints(points);
    updateWorkAndBackupRasters(bbox + m_lastRect);
    m_tileSaver->save(bbox);
    m_brush->addArc(m_points[m - 4], old, mid, m_oldOpacity, opacity);
    m_lastRect += bbox;
  }
  m_oldOpacity = opacity;
  m_brush->updateDrawing(ri->getRaster(), m_backUpRas, m_currentColor, bbox,
                         m_opacity.getValue().second * 0.01);
  invalidate(invalidateRect.enlarge(2) - rasCenter);
  m_strokeRect += bbox;
}

//---------------------------------------------------------------------------------------------------------------

void FullColorBrushTool::leftButtonUp(const TPointD &pos,
                                      const TMouseEvent &e) {
  m_brushPos = m_mousePos = pos;

  TRasterImageP ri = (TRasterImageP)getImage(true);
  if (!ri) return;

  if (m_points.size() != 1) {
    double maxThickness = m_thickness.getValue().second;
    double thickness    = m_pressure.getValue()
                           ? computeThickness(e.m_pressure, m_thickness)
                           : maxThickness;
    double opacity =
        (m_pressure.getValue() ? computeThickness(e.m_pressure, m_opacity)
                               : m_opacity.getValue().second) *
        0.01;
    TPointD rasCenter = ri->getRaster()->getCenterD();
    TThickPoint point(pos + rasCenter, thickness);
    m_points.push_back(point);
    int m = m_points.size();
    std::vector<TThickPoint> points;
    points.push_back(m_points[m - 3]);
    points.push_back(m_points[m - 2]);
    points.push_back(m_points[m - 1]);
    TRect bbox = m_brush->getBoundFromPoints(points);
    updateWorkAndBackupRasters(bbox);
    m_tileSaver->save(bbox);
    m_brush->addArc(points[0], points[1], points[2], m_oldOpacity, opacity);
    m_brush->updateDrawing(ri->getRaster(), m_backUpRas, m_currentColor, bbox,
                           m_opacity.getValue().second * 0.01);
    TRectD invalidateRect = ToolUtils::getBounds(points, maxThickness);
    invalidate(invalidateRect.enlarge(2) - rasCenter);
    m_strokeRect += bbox;
    m_lastRect.empty();
  }

  if (m_brush) {
    delete m_brush;
    m_brush = 0;
  }

  m_workRaster->unlock();

  if (m_tileSet->getTileCount() > 0) {
    delete m_tileSaver;
    TTool::Application *app   = TTool::getApplication();
    TXshLevel *level          = app->getCurrentLevel()->getLevel();
    TXshSimpleLevelP simLevel = level->getSimpleLevel();
    TFrameId frameId          = getCurrentFid();
    TRasterP ras              = ri->getRaster()->extract(m_strokeRect)->clone();
    TUndoManager::manager()->add(
        new FullColorBrushUndo(m_tileSet, simLevel.getPointer(), frameId,
                               m_isFrameCreated, ras, m_strokeRect.getP00()));
  }

  notifyImageChanged();
  m_strokeRect.empty();
  m_mousePressed = false;
}

//---------------------------------------------------------------------------------------------------------------

void FullColorBrushTool::mouseMove(const TPointD &pos, const TMouseEvent &e) {
  struct Locals {
    FullColorBrushTool *m_this;

    void setValue(TIntPairProperty &prop,
                  const TIntPairProperty::Value &value) {
      prop.setValue(value);

      m_this->onPropertyChanged(prop.getName());
      TTool::getApplication()->getCurrentTool()->notifyToolChanged();
    }

    void addMinMax(TIntPairProperty &prop, double add) {
      const TIntPairProperty::Range &range = prop.getRange();

      TIntPairProperty::Value value = prop.getValue();
      value.second =
          tcrop<double>(value.second + add, range.first, range.second);
      value.first = tcrop<double>(value.first + add, range.first, range.second);

      setValue(prop, value);
    }

    void addMinMaxSeparate(TIntPairProperty &prop, double min, double max) {
      if (min == 0.0 && max == 0.0) return;
      const TIntPairProperty::Range &range = prop.getRange();

      TIntPairProperty::Value value = prop.getValue();
      value.first += min;
      value.second += max;
      if (value.first > value.second) value.first = value.second;
      value.first  = tcrop<double>(value.first, range.first, range.second);
      value.second = tcrop<double>(value.second, range.first, range.second);

      setValue(prop, value);
    }

  } locals = {this};

  // if (e.isAltPressed() && !e.isCtrlPressed()) {
  // const TPointD &diff = pos - m_mousePos;
  // double add = (fabs(diff.x) > fabs(diff.y)) ? diff.x : diff.y;

  // locals.addMinMax(m_thickness, int(add));
  //} else
  if (e.isCtrlPressed() && e.isAltPressed()) {
    const TPointD &diff = pos - m_mousePos;
    double max          = diff.x / 2;
    double min          = diff.y / 2;

    locals.addMinMaxSeparate(m_thickness, int(min), int(max));
  } else {
    m_brushPos = pos;
  }

  m_mousePos = pos;
  invalidate();
}

//-------------------------------------------------------------------------------------------------------------

void FullColorBrushTool::draw() {
  if (TRasterImageP ri = TRasterImageP(getImage(false))) {
    TRasterP ras = ri->getRaster();

    glColor3d(1.0, 0.0, 0.0);

    tglDrawCircle(m_brushPos, (m_minThick + 1) * 0.5);
    tglDrawCircle(m_brushPos, (m_maxThick + 1) * 0.5);
  }
}

//--------------------------------------------------------------------------------------------------------------

void FullColorBrushTool::onEnter() {
  TImageP img = getImage(false);
  TRasterImageP ri(img);
  if (ri) {
    m_minThick = m_thickness.getValue().first;
    m_maxThick = m_thickness.getValue().second;
  } else {
    m_minThick = 0;
    m_maxThick = 0;
  }

  updateCurrentColor();
}

//----------------------------------------------------------------------------------------------------------

void FullColorBrushTool::onLeave() {
  m_minThick = 0;
  m_maxThick = 0;
}

//----------------------------------------------------------------------------------------------------------

TPropertyGroup *FullColorBrushTool::getProperties(int targetType) {
  if (!m_presetsLoaded) initPresets();

  return &m_prop;
}

//----------------------------------------------------------------------------------------------------------

void FullColorBrushTool::onImageChanged() { setWorkAndBackupImages(); }

//----------------------------------------------------------------------------------------------------------

void FullColorBrushTool::setWorkAndBackupImages() {
  TRasterImageP ri = (TRasterImageP)getImage(false, 1);
  if (!ri) return;

  TRasterP ras   = ri->getRaster();
  TDimension dim = ras->getSize();

  if (!m_workRaster || m_workRaster->getLx() > dim.lx ||
      m_workRaster->getLy() > dim.ly)
    m_workRaster = TRaster32P(dim);

  if (!m_backUpRas || m_backUpRas->getLx() > dim.lx ||
      m_backUpRas->getLy() > dim.ly ||
      m_backUpRas->getPixelSize() != ras->getPixelSize())
    m_backUpRas = ras->create(dim.lx, dim.ly);

  m_strokeRect.empty();
  m_lastRect.empty();
}

//------------------------------------------------------------------

bool FullColorBrushTool::onPropertyChanged(std::string propertyName) {
  m_minThick = m_thickness.getValue().first;
  m_maxThick = m_thickness.getValue().second;
  if (propertyName == "Hardness:" || propertyName == "Thickness" ||
      propertyName == "Size") {
    m_brushPad = ToolUtils::getBrushPad(m_thickness.getValue().second,
                                        m_hardness.getValue() * 0.01);
    TRectD rect(m_brushPos - TPointD(m_maxThick + 2, m_maxThick + 2),
                m_brushPos + TPointD(m_maxThick + 2, m_maxThick + 2));
    invalidate(rect);
  }
  /*if(propertyName == "Hardness:" || propertyName == "Opacity:")
setWorkAndBackupImages();*/
  FullcolorBrushMinSize        = m_minThick;
  FullcolorBrushMaxSize        = m_maxThick;
  FullcolorPressureSensitivity = m_pressure.getValue();
  FullcolorBrushHardness       = m_hardness.getValue();
  FullcolorMinOpacity          = m_opacity.getValue().first;
  FullcolorMaxOpacity          = m_opacity.getValue().second;

  if (propertyName == "Preset:") {
    loadPreset();
    getApplication()->getCurrentTool()->notifyToolChanged();
    return true;
  }

  if (m_preset.getValue() != CUSTOM_WSTR) {
    m_preset.setValue(CUSTOM_WSTR);
    getApplication()->getCurrentTool()->notifyToolChanged();
  }

  return true;
}

//------------------------------------------------------------------

void FullColorBrushTool::initPresets() {
  if (!m_presetsLoaded) {
    // If necessary, load the presets from file
    m_presetsLoaded = true;
    m_presetsManager.load(TEnv::getConfigDir() + "brush_raster.txt");
  }

  // Rebuild the presets property entries
  const std::set<BrushData> &presets = m_presetsManager.presets();

  m_preset.deleteAllValues();
  m_preset.addValue(CUSTOM_WSTR);

  std::set<BrushData>::const_iterator it, end = presets.end();
  for (it = presets.begin(); it != end; ++it) m_preset.addValue(it->m_name);
}

//----------------------------------------------------------------------------------------------------------

void FullColorBrushTool::loadPreset() {
  const std::set<BrushData> &presets = m_presetsManager.presets();
  std::set<BrushData>::const_iterator it;

  it = presets.find(BrushData(m_preset.getValue()));
  if (it == presets.end()) return;

  const BrushData &preset = *it;

  try  // Don't bother with RangeErrors
  {
    m_thickness.setValue(
        TIntPairProperty::Value(std::max((int)preset.m_min, 1), preset.m_max));
    m_brushPad = ToolUtils::getBrushPad(preset.m_max, preset.m_hardness * 0.01);
    m_hardness.setValue(preset.m_hardness, true);
    m_opacity.setValue(
        TDoublePairProperty::Value(preset.m_opacityMin, preset.m_opacityMax));
    m_pressure.setValue(preset.m_pressure);
  } catch (...) {
  }
}

//------------------------------------------------------------------

void FullColorBrushTool::addPreset(QString name) {
  // Build the preset
  BrushData preset(name.toStdWString());

  preset.m_min        = m_thickness.getValue().first;
  preset.m_max        = m_thickness.getValue().second;
  preset.m_hardness   = m_hardness.getValue();
  preset.m_opacityMin = m_opacity.getValue().first;
  preset.m_opacityMax = m_opacity.getValue().second;
  preset.m_pressure   = m_pressure.getValue();

  // Pass the preset to the manager
  m_presetsManager.addPreset(preset);

  // Reinitialize the associated preset enum
  initPresets();

  // Set the value to the specified one
  m_preset.setValue(preset.m_name);
}

//------------------------------------------------------------------

void FullColorBrushTool::removePreset() {
  std::wstring name(m_preset.getValue());
  if (name == CUSTOM_WSTR) return;

  m_presetsManager.removePreset(name);
  initPresets();

  // No parameter change, and set the preset value to custom
  m_preset.setValue(CUSTOM_WSTR);
}

//------------------------------------------------------------------

void FullColorBrushTool::updateCurrentColor() {
  TTool::Application *app = getApplication();
  if (app->getCurrentObject()->isSpline()) {
    m_currentColor = TPixel32::Red;
    return;
  }
  TPalette *plt = app->getCurrentPalette()->getPalette();
  if (!plt) return;

  int style               = app->getCurrentLevelStyleIndex();
  TColorStyle *colorStyle = plt->getStyle(style);
  m_currentColor          = colorStyle->getMainColor();
}

//==========================================================================================================

FullColorBrushToolNotifier::FullColorBrushToolNotifier(FullColorBrushTool *tool)
    : m_tool(tool) {
  TTool::Application *app = m_tool->getApplication();
  TXshLevelHandle *levelHandle;
  if (app) levelHandle = app->getCurrentLevel();
  bool ret             = false;
  if (levelHandle) {
    bool ret = connect(levelHandle, SIGNAL(xshCanvasSizeChanged()), this,
                       SLOT(onCanvasSizeChanged()));
    assert(ret);
  }
}

//==========================================================================================================

FullColorBrushTool fullColorPencil("T_Brush");