#include "autofill.h"

#include "tregion.h"

#include "tgeometry.h"

#include "tstroke.h"

#include "toonz4.6/tmacro.h"

#include <qmap></qmap>

#include <qpair></qpair>

#include <qlist></qlist>

namespace {

#define BORDER_TOO 1

#define NO_BORDER 0

#define DIM_TRESH 0.00005

#define AMB_TRESH 130000

#define MIN_SIZE 20

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

struct Region {

  double m_area, m_perimeter;

  TPointD m_barycentre;

  TDimensionD m_size;

  int m_match, m_styleId;

  TRegion *m_region;

  Region()

      : m_area(0)

      , m_perimeter(0)

      , m_barycentre(0, 0)

      , m_size(0, 0)

      , m_match(-1)

      , m_styleId(0)

      , m_region(0) {}

};

struct MatchingProbs {

  int m_from, m_to;

  int m_perimeterProb, m_areaProb, m_barycenterProb;

  bool m_overlappingArea, m_matched;

  MatchingProbs()

      : m_from(0)

      , m_to(0)

      , m_perimeterProb(0)

      , m_areaProb(0)

      , m_barycenterProb(0)

      , m_overlappingArea(false)

      , m_matched(false) {}

};

typedef QMap<int, region=""> RegionDataList;</int,>

static RegionDataList regionsReference, regionsWork;

static TPointD referenceB(0, 0);

static TPointD workB(0, 0);

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

class AreasAndPerimeterFormula final : public TRegionFeatureFormula {

  double m_signedArea, m_perimeter;

public:

  AreasAndPerimeterFormula() : m_signedArea(0), m_perimeter(0) {}

  ~AreasAndPerimeterFormula() {}

  void update(const TPointD &p1, const TPointD &p2) override {

    m_perimeter += norm(p2 - p1);

    m_signedArea += ((p1.x * p2.y) - (p2.x * p1.y)) * 0.5;

  }

  double getPerimeter() { return m_perimeter; }

  double getSignedArea() { return m_signedArea; }

  double getArea() { return fabs(m_signedArea); }

};

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

class CentroidFormula final : public TRegionFeatureFormula {

  TPointD m_centroid;

  double m_signedArea;

public:

  CentroidFormula() : m_centroid(), m_signedArea(0) {}

  ~CentroidFormula() {}

  void update(const TPointD &p1, const TPointD &p2) override {

    double factor = ((p1.x * p2.y) - (p2.x * p1.y));

    m_centroid.x += (p1.x + p2.x) * factor;

    m_centroid.y += (p1.y + p2.y) * factor;

  }

  void setSignedArea(double signedArea) { m_signedArea = signedArea; }

  TPointD getCentroid() { return (1 / (6 * m_signedArea)) * m_centroid; }

};

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

int match(std::vector<matchingprobs> &probsVector, int &from, int &to) {</matchingprobs>

  int i = 0, maxProb = 0;

  bool overlappingArea = false;

  std::vector<matchingprobs>::iterator it, matchedProbs;</matchingprobs>

  for (it = probsVector.begin(); it != probsVector.end(); it++) {

    MatchingProbs probs = *it;

    if (probs.m_matched) continue;

    int probValue =

        probs.m_areaProb * probs.m_barycenterProb * probs.m_perimeterProb;

    if ((!overlappingArea &&

         (maxProb < probValue || probs.m_overlappingArea)) ||

        (overlappingArea && maxProb < probValue && probs.m_overlappingArea)) {

      overlappingArea = probs.m_overlappingArea;

      maxProb         = probValue;

      from            = probs.m_from;

      to              = probs.m_to;

      matchedProbs    = it;

    }

  }

  if (maxProb) matchedProbs->m_matched = true;

  return maxProb;

}

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

void assignProbs(std::vector<matchingprobs> &probVector,</matchingprobs>

                 const Region &reference, const Region &work, int from,

                 int to) {

  double delta_posx1, delta_posy1, delta_posx2, delta_posy2;

  int delta_area, delta_per;

  double delta_pos, delta_pos_max;

  MatchingProbs probs;

  probs.m_from = from;

  probs.m_to   = to;

  TRegion *refRegion  = reference.m_region;

  TRegion *workRegion = work.m_region;

  probs.m_overlappingArea =

      refRegion->getBBox().overlaps(workRegion->getBBox());

  delta_posx1 = reference.m_barycentre.x / reference.m_area - referenceB.x;

  delta_posy1 = reference.m_barycentre.y / reference.m_area - referenceB.y;

  delta_posx2 = work.m_barycentre.x / work.m_area - workB.x;

  delta_posy2 = work.m_barycentre.y / work.m_area - workB.y;

  // Cosi' calcolo il modulo della differenza

  delta_pos = sqrt((delta_posx2 - delta_posx1) * (delta_posx2 - delta_posx1) +

                   (delta_posy2 - delta_posy1) * (delta_posy2 - delta_posy1));

  delta_pos_max = sqrt((double)(work.m_size.lx * work.m_size.lx +

                                work.m_size.ly * work.m_size.ly));

  probs.m_barycenterProb = tround(1000 * (1 - (delta_pos / delta_pos_max)));

  delta_area = abs(reference.m_area - work.m_area);

  probs.m_areaProb = tround(

      1000 * (1 - ((double)delta_area / (reference.m_area + work.m_area))));

  delta_per             = abs(reference.m_perimeter - work.m_perimeter);

  probs.m_perimeterProb = tround(

      1000 *

      (1 - ((double)delta_per / (reference.m_perimeter + work.m_perimeter))));

  probVector.push_back(probs);

}

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

void scanRegion(TRegion *reg, int regionIndex, RegionDataList &rlst,

                const TRectD &selectingRect) {

  assert(!rlst.contains(regionIndex));

  if (!selectingRect.contains(reg->getBBox())) return;

  AreasAndPerimeterFormula areasAndPerimeter;

  CentroidFormula centroid;

  computeRegionFeature(*reg, areasAndPerimeter);

  computeRegionFeature(*reg, centroid);

  centroid.setSignedArea(areasAndPerimeter.getSignedArea());

  Region regionData;

  regionData.m_area       = areasAndPerimeter.getArea();

  regionData.m_perimeter  = areasAndPerimeter.getPerimeter();

  regionData.m_barycentre = centroid.getCentroid() * regionData.m_area;

  regionData.m_size       = reg->getBBox().getSize();

  UINT i, subRegCount = reg->getSubregionCount();

  for (i = 0; i < subRegCount; i++) {

    TRegion *subReg = reg->getSubregion(i);

    AreasAndPerimeterFormula subAreasAndPerimeter;

    CentroidFormula subCentroid;

    computeRegionFeature(*subReg, subAreasAndPerimeter);

    computeRegionFeature(*subReg, subCentroid);

    subCentroid.setSignedArea(subAreasAndPerimeter.getSignedArea());

    regionData.m_area -= subAreasAndPerimeter.getArea();

    regionData.m_barycentre -=

        subCentroid.getCentroid() * subAreasAndPerimeter.getArea();

  }

  regionData.m_barycentre.x /= regionData.m_area;

  regionData.m_barycentre.y /= regionData.m_area;

  regionData.m_styleId = reg->getStyle();

  regionData.m_region  = reg;

  rlst[regionIndex] = regionData;

}

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

void scanSubRegion(TRegion *region, int &index, RegionDataList &rlst,

                   const TRectD &selectingRect) {

  scanRegion(region, index, rlst, selectingRect);

  index++;

  int j, subRegionCount = region->getSubregionCount();

  for (j = 0; j < subRegionCount; j++) {

    TRegion *subRegion = region->getSubregion(j);

    scanSubRegion(subRegion, index, rlst, selectingRect);

  }

}

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

bool contains(TRegion *container, TRegion *contained) {

  if (!(container->getBBox().contains(contained->getBBox()))) return false;

  for (UINT i = 0; i < contained->getEdgeCount(); i++)

    for (UINT j = 0; j < container->getEdgeCount(); j++)

      if (*contained->getEdge(i) == *container->getEdge(j)) return false;

  for (UINT i = 0; i < contained->getEdgeCount(); i++) {

    TEdge *e = contained->getEdge(i);

    if (!container->contains(e->m_s->getThickPoint(e->m_w0))) return false;

    if (!container->contains(e->m_s->getThickPoint((e->m_w0 + e->m_w1) / 2.0)))

      return false;

    if (!container->contains(e->m_s->getThickPoint(e->m_w1))) return false;

  }

  return true;

}

}  // namespace

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

void rect_autofill_learn(const TVectorImageP &imgToLearn, const TRectD &rect)

{

  if (rect.getLx() * rect.getLy() < MIN_SIZE) return;

  double pbx, pby;

  double totalArea = 0;

  pbx = pby = 0;

  if (!regionsReference.isEmpty()) regionsReference.clear();

  int i, index = 0, regionCount = imgToLearn->getRegionCount();

  for (i = 0; i < regionCount; i++) {

    TRegion *region = imgToLearn->getRegion(i);

    if (rect.contains(region->getBBox())) {

      scanRegion(region, index, regionsReference, rect);

      index++;

    }

    int j, subRegionCount = region->getSubregionCount();

    for (j = 0; j < subRegionCount; j++) {

      TRegion *subRegion = region->getSubregion(j);

      if (rect.contains(subRegion->getBBox()))

        scanSubRegion(subRegion, index, regionsReference, rect);

    }

  }

  QMap<int, region="">::Iterator it;</int,>

  for (it = regionsReference.begin(); it != regionsReference.end(); it++) {

    pbx += it.value().m_barycentre.x;

    pby += it.value().m_barycentre.y;

    totalArea += it.value().m_area;

  }

  if (totalArea > 0)

    referenceB = TPointD(pbx / totalArea, pby / totalArea);

  else

    referenceB = TPointD(0.0, 0.0);

}

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

bool rect_autofill_apply(const TVectorImageP &imgToApply, const TRectD &rect,

                         bool selective) {

  if (rect.getLx() * rect.getLy() < MIN_SIZE) return false;

  if (regionsReference.size() <= 0) return false;

  double pbx, pby;

  double totalArea = 0;

  pbx = pby = 0.0;

  if (!regionsWork.isEmpty()) regionsWork.clear();

  int i, index = 0, regionCount = imgToApply->getRegionCount();

  for (i = 0; i < regionCount; i++) {

    TRegion *region = imgToApply->getRegion(i);

    TRectD bbox     = region->getBBox();

    if (rect.contains(bbox)) {

      scanRegion(region, index, regionsWork, rect);

      index++;

    }

    int j, subRegionCount = region->getSubregionCount();

    for (j = 0; j < subRegionCount; j++) {

      TRegion *subRegion = region->getSubregion(j);

      if (rect.contains(subRegion->getBBox()))

        scanSubRegion(subRegion, index, regionsWork, rect);

    }

  }

  if (regionsWork.size() <= 0) return false;

  QMap<int, region="">::Iterator it;</int,>

  for (it = regionsWork.begin(); it != regionsWork.end(); it++) {

    pbx += it.value().m_barycentre.x;

    pby += it.value().m_barycentre.y;

    totalArea += it.value().m_area;

  }

  workB = TPointD(pbx / totalArea, pby / totalArea);

  std::vector<matchingprobs> probVector;</matchingprobs>

  RegionDataList::Iterator refIt, workIt;

  for (refIt = regionsReference.begin(); refIt != regionsReference.end();

       refIt++)

    for (workIt = regionsWork.begin(); workIt != regionsWork.end(); workIt++)

      assignProbs(probVector, refIt.value(), workIt.value(), refIt.key(),

                  workIt.key());

  bool filledRegions = false;

  for (refIt = regionsReference.begin(); refIt != regionsReference.end();

       refIt++) {

    int to = 0, from = 0;

    int valore = 0;

    do

      valore = match(probVector, from, to);

    while ((regionsWork[to].m_match != -1 ||

            regionsReference[from].m_match != -1) &&

           valore > 0);

    if (valore > AMB_TRESH) {

      regionsWork[to].m_match        = from;

      regionsReference[from].m_match = to;

      regionsWork[to].m_styleId      = regionsReference[from].m_styleId;

      TRegion *reg                   = regionsWork[to].m_region;

      if (reg && (!selective || selective && reg->getStyle() == 0)) {

        reg->setStyle(regionsWork[to].m_styleId);

        filledRegions = true;

      }

    }

  }

  return filledRegions;

}

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

void stroke_autofill_learn(const TVectorImageP &imgToLearn, TStroke *stroke) {

  if (!imgToLearn || !stroke || stroke->getControlPointCount() == 0) return;

  TVectorImage appImg;

  TStroke *appStroke = new TStroke(*stroke);

  appImg.addStroke(appStroke);

  appImg.findRegions();

  double pbx, pby;

  double totalArea = 0;

  pbx = pby = 0;

  if (!regionsReference.isEmpty()) regionsReference.clear();

  int i, j, index = 0;

  for (i = 0; i < (int)imgToLearn->getRegionCount(); i++) {

    TRegion *currentRegion = imgToLearn->getRegion(i);

    for (j = 0; j < (int)appImg.getRegionCount(); j++) {

      TRegion *region = appImg.getRegion(j);

      if (contains(region, currentRegion)) {

        scanRegion(currentRegion, index, regionsReference, region->getBBox());

        index++;

        int k, subRegionCount = currentRegion->getSubregionCount();

        for (k = 0; k < subRegionCount; k++) {

          TRegion *subRegion = currentRegion->getSubregion(k);

          if (contains(region, subRegion))

            scanSubRegion(subRegion, index, regionsReference,

                          region->getBBox());

        }

      }

    }

  }

  QMap<int, region="">::Iterator it;</int,>

  for (it = regionsReference.begin(); it != regionsReference.end(); it++) {

    pbx += it.value().m_barycentre.x;

    pby += it.value().m_barycentre.y;

    totalArea += it.value().m_area;

  }

  if (totalArea > 0)

    referenceB = TPointD(pbx / totalArea, pby / totalArea);

  else

    referenceB = TPointD(0.0, 0.0);

}

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

bool stroke_autofill_apply(const TVectorImageP &imgToApply, TStroke *stroke,

                           bool selective) {

  if (!imgToApply || !stroke || stroke->getControlPointCount() == 0)

    return false;

  TVectorImage appImg;

  TStroke *appStroke = new TStroke(*stroke);

  appImg.addStroke(appStroke);

  appImg.findRegions();

  if (regionsReference.size() <= 0) return false;

  double pbx, pby;

  double totalArea = 0;

  pbx = pby = 0.0;

  if (!regionsWork.isEmpty()) regionsWork.clear();

  int i, j, index = 0;

  for (i = 0; i < (int)imgToApply->getRegionCount(); i++) {

    TRegion *currentRegion = imgToApply->getRegion(i);

    for (j = 0; j < (int)appImg.getRegionCount(); j++) {

      TRegion *region = appImg.getRegion(j);

      if (contains(region, currentRegion)) {

        scanRegion(currentRegion, index, regionsWork, region->getBBox());

        index++;

        int k, subRegionCount = currentRegion->getSubregionCount();

        for (k = 0; k < subRegionCount; k++) {

          TRegion *subRegion = currentRegion->getSubregion(k);

          if (contains(region, subRegion))

            scanSubRegion(subRegion, index, regionsWork, region->getBBox());

        }

      }

    }

  }

  if (regionsWork.size() <= 0) return false;

  QMap<int, region="">::Iterator it;</int,>

  for (it = regionsWork.begin(); it != regionsWork.end(); it++) {

    pbx += it.value().m_barycentre.x;

    pby += it.value().m_barycentre.y;

    totalArea += it.value().m_area;

  }

  workB = TPointD(pbx / totalArea, pby / totalArea);

  std::vector<matchingprobs> probVector;</matchingprobs>

  RegionDataList::Iterator refIt, workIt;

  for (refIt = regionsReference.begin(); refIt != regionsReference.end();

       refIt++)

    for (workIt = regionsWork.begin(); workIt != regionsWork.end(); workIt++)

      assignProbs(probVector, refIt.value(), workIt.value(), refIt.key(),

                  workIt.key());

  bool filledRegions = false;

  for (refIt = regionsReference.begin(); refIt != regionsReference.end();

       refIt++) {

    int to = 0, from = 0;

    int valore = 0;

    do

      valore = match(probVector, from, to);

    while ((regionsWork[to].m_match != -1 ||

            regionsReference[from].m_match != -1) &&

           valore > 0);

    if (valore > AMB_TRESH) {

      regionsWork[to].m_match        = from;

      regionsReference[from].m_match = to;

      regionsWork[to].m_styleId      = regionsReference[from].m_styleId;

      TRegion *reg                   = regionsWork[to].m_region;

      if (reg && (!selective || selective && reg->getStyle() == 0)) {

        reg->setStyle(regionsWork[to].m_styleId);

        filledRegions = true;

      }

    }

  }

  return filledRegions;

}