#include "morphtool.h"

#include "tgl.h"

#include "tvectorgl.h"

#include "tvectorrenderdata.h"

#include "tvectorimage.h"

#include "tstroke.h"

#include <math.h></math.h>

#include "tools/toolhandle.h"

#include "toonz/txshlevelhandle.h"

#include "toonz/tframehandle.h"

#include "toonz/txshsimplelevel.h"

#include <qkeyevent></qkeyevent>

class Deformation {

public:

  std::vector<tpointd> m_controlPoints;</tpointd>

  int m_selected;

  TAffine m_aff;

  std::vector<tpointd> m_delta;</tpointd>

  int getClosest(const TPointD &p) const;

  Deformation();

  void update() {

    TPointD p0 = m_controlPoints[0];

    TPointD p1 = m_controlPoints[2];

    TPointD p2 = m_controlPoints[4];

    double a00 = p0.x - p2.x, a01 = p1.x - p2.x, a10 = p0.y - p2.y,

           a11 = p1.y - p2.y;

    TAffine aff(a00, a01, 0, a10, a11, 0);

    aff       = aff.inv();

    TPointD d = -(aff * p2);

    aff.a13   = d.x;

    aff.a23   = d.y;

    m_aff     = aff;

    m_delta.resize(3);

    m_delta[0] = m_controlPoints[1] - p0;

    m_delta[1] = m_controlPoints[3] - p1;

    m_delta[2] = m_controlPoints[5] - p2;

  }

  TPointD apply(const TPointD &p, double t = 1.0) {

    TPointD d = m_aff * p;

    double c0 = d.x, c1 = d.y, c2 = 1 - c0 - c1;

    TPointD delta = c0 * m_delta[0] + c1 * m_delta[1] + c2 * m_delta[2];

    return p + delta * t;

  }

  void deform(TStroke *dstStroke, const TStroke *srcStroke, double t = 1.0) {

    int n = srcStroke->getControlPointCount();

    if (dstStroke->getControlPointCount() < n)

      n = dstStroke->getControlPointCount();

    for (int i = 0; i < n; i++) {

      TThickPoint srcPoint = srcStroke->getControlPoint(i);

      dstStroke->setControlPoint(i, apply(srcPoint, t));

    }

  }

  void deform(TVectorImage *dstImage, const TVectorImage *srcImage,

              double t = 1.0) {

    update();

    int n                                      = srcImage->getStrokeCount();

    if ((int)dstImage->getStrokeCount() < n) n = dstImage->getStrokeCount();

    std::vector<int> ii(n);</int>

    std::vector<tstroke *=""> oldStrokes(n);</tstroke>

    for (int i = 0; i < n; i++) {

      ii[i]         = i;

      oldStrokes[i] = srcImage->getStroke(i);

      deform(dstImage->getStroke(i), oldStrokes[i], t);

    }

    dstImage->notifyChangedStrokes(ii, oldStrokes);

  }

  void updateLevel() {

    TTool::Application *app = TTool::getApplication();

    if (!app->getCurrentLevel()->getLevel()) return;

    TXshSimpleLevelP xl = app->getCurrentLevel()->getLevel()->getSimpleLevel();

    if (app->getCurrentFrame()->getFrameType() != TFrameHandle::LevelFrame)

      return;

    TFrameId fid      = app->getCurrentFrame()->getFid();

    TVectorImageP src = xl->getFrame(fid, true);

    int count         = src->getStrokeCount();

    for (int i = 1; i < 10; i++) {

      ++fid;

      if (!xl->isFid(fid)) {

        TVectorImageP vi = new TVectorImage();

        xl->setFrame(fid, vi);

      }

      TVectorImageP vi  = xl->getFrame(fid, true);

      TVectorImageP dst = src->clone();

      deform(dst.getPointer(), src.getPointer(), (double)i / (double)9);

      count = dst->getStrokeCount();

      vi->mergeImage(dst, TAffine());

      app->getCurrentTool()->getTool()->notifyImageChanged(fid);

    }

  }

};

Deformation::Deformation() : m_selected(-1) {

  m_controlPoints.resize(6);

  m_controlPoints[0] = TPointD(-250, 100);

  m_controlPoints[2] = TPointD(0, -300);

  m_controlPoints[4] = TPointD(250, 100);

  for (int i = 0; i < 6; i += 2) m_controlPoints[i + 1] = m_controlPoints[i];

}

int Deformation::getClosest(const TPointD &p) const {

  int k            = -1;

  double closestD2 = 0;

  for (int i = 0; i < (int)m_controlPoints.size(); i++) {

    TPointD cp = m_controlPoints[i];

    double d2  = norm2(p - cp);

    if (k < 0 || d2 <= closestD2) {

      closestD2 = d2;

      k         = i;

    }

  }

  return closestD2 < 100 ? k : -1;

}

Deformation deformation;

/*

TThickPoint deform(const TThickPoint &p)

{

  double r2 = p.x*p.x+p.y*p.y;

  double f = exp(-r2*0.001);

  return p + delta * f;

}

*/

MorphTool::MorphTool() : m_pixelSize(1) {}

MorphTool::~MorphTool() {}

void MorphTool::setImage(const TVectorImageP &vi) { m_vi = vi; }

void MorphTool::leftButtonDown(const TPointD &pos, const TMouseEvent &e) {

  m_lastPos = m_firstPos = pos;

  int index              = deformation.getClosest(pos);

  if (index >= 0)

    deformation.m_selected = index;

  else

    deformation.m_selected = -1;

  if (m_vi && index >= 0) {

    m_vi2 = m_vi->clone();

    deformation.deform(m_vi2.getPointer(), m_vi.getPointer());

  } else {

    m_vi2 = TVectorImageP();

  }

}

void MorphTool::leftButtonDrag(const TPointD &pos, const TMouseEvent &e) {

  if (deformation.m_selected < 0) return;

  TPointD delta = pos - m_lastPos;

  m_lastPos     = pos;

  deformation.m_controlPoints[deformation.m_selected] += delta;

  if ((deformation.m_selected & 1) == 0)

    deformation.m_controlPoints[deformation.m_selected + 1] += delta;

  if (m_vi2 && m_vi) deformation.deform(m_vi2.getPointer(), m_vi.getPointer());

}

void MorphTool::leftButtonUp(const TPointD &pos, const TMouseEvent &e) {

  m_vi2 = TVectorImageP();

}

void MorphTool::draw() {

  m_pixelSize = sqrt(tglGetPixelSize2());

  if (m_vi2) {

    TVectorRenderData rd(TTranslation(10, 10), TRect(), 0, 0);

    tglDraw(rd, m_vi2.getPointer());

  }

  double u = m_pixelSize * 5;

  for (int i = 0; i < (int)deformation.m_controlPoints.size(); i++) {

    TPointD p     = deformation.m_controlPoints[i];

    bool selected = deformation.m_selected == i;

    bool base     = (i & 1) == 0;

    if (base)

      if (selected)

        glColor3d(0.8, 0.8, 0.1);

      else

        glColor3d(0.5, 0.5, 0.1);

    else if (selected)

      glColor3d(0.8, 0.3, 0.1);

    else

      glColor3d(0.5, 0.1, 0.1);

    double r = base ? u * 2 : u * 1;

    tglDrawDisk(p, r);

    glColor3d(0, 0, 0);

    tglDrawCircle(p, r);

  }

  glColor3f(0, 1, 0);

  for (int i = 0; i + 1 < (int)deformation.m_controlPoints.size(); i += 2) {

    TPointD a = deformation.m_controlPoints[i];

    TPointD b = deformation.m_controlPoints[i + 1];

    tglDrawSegment(a, b);

  }

  /*

deformation.update();

glBegin(GL_LINES);

for(double x = -200; x<=200; x+=20)

for(double y = -200; y<=200; y+=20)

{

TPointD p0(x,y);

TPointD p1 = deformation.apply(p0);

glColor3d(0,1,0);

tglVertex(p0);

glColor3d(1,0,0);

tglVertex(p1);

}

glEnd();

*/

}

bool MorphTool::keyDown(QKeyEvent *event) {

  if (event->key() == Qt::Key_A)

    deformation.updateLevel();

  else

    return false;

  return true;

}