// Rendering components

#include "toonz/multimediarenderer.h"

#include "toonz/movierenderer.h"

#include "trenderer.h"

// Scene structures

#include "toonz/toonzscene.h"

#include "toonz/txsheet.h"

#include "toonz/fxdag.h"

#include "toonz/tcolumnfxset.h"

// Fxs tree decomposition

#include "toonz/scenefx.h"

#include "toonz/tcolumnfx.h"

// Idle processing

#include <qeventloop></qeventloop>

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

//  Local stuff

namespace {

std::wstring removeSpaces(const std::wstring &str) {

  std::wstring result;

  std::wstring::size_type a = 0, b;

  while ((b = str.find_first_of(L" ", a)) != std::wstring::npos) {

    result += str.substr(a, b - a);

    a = b + 1;

  }

  result += str.substr(a, std::wstring::npos);

  return result;

}

}

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

//

//    MultimediaRenderer::Imp   class

//

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

class MultimediaRenderer::Imp final : public MovieRenderer::Listener,

                                      public TSmartObject {

public:

  ToonzScene *m_scene;

  TFilePath m_fp;

  int m_threadCount;

  bool m_cacheResults;

  // Output movie frames. May be remapped from rendered ones.

  double m_xDpi, m_yDpi;

  TRenderSettings m_renderSettings;

  std::vector<multimediarenderer::listener *=""> m_listeners;</multimediarenderer::listener>

  bool m_precomputingEnabled;

  bool m_canceled;

  int m_currentFx;

  set<double>::iterator m_currentFrame;</double>

  TRenderer *m_currentTRenderer;

  TFxSet m_fxsToRender;

  set<double> m_framesToRender;</double>

  QEventLoop m_eventLoop;

  int m_multimediaMode;

  Imp(ToonzScene *scene, const TFilePath &moviePath, int multimediaMode,

      int threadCount, bool cacheResults);

  ~Imp();

  void scanSceneForRenderNodes();

  void scanSceneForColumns();

  void scanSceneForLayers();

  bool scanColsRecursive(TFx *fx);

  TColumnFx *searchColumn(TFxP fx);

  TFxP addPostProcessing(TFxP fx, TFxP postProc);

  void addPostProcessingRecursive(TFxP fx, TFxP postProc);

  void start();

  bool onFrameCompleted(int frame) override;

  bool onFrameFailed(int frame, TException &e) override;

  void onSequenceCompleted(const TFilePath &fp) override;

  void onRenderCompleted();

};

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

MultimediaRenderer::Imp::Imp(ToonzScene *scene, const TFilePath &moviePath,

                             int multimediaMode, int threadCount,

                             bool cacheResults)

    : m_scene(scene)

    , m_fp(moviePath)

    , m_threadCount(threadCount)

    , m_cacheResults(cacheResults)

    , m_xDpi(72)

    , m_yDpi(72)

    , m_renderSettings()

    , m_listeners()

    , m_precomputingEnabled(true)

    , m_canceled(false)

    , m_currentFx(0)

    , m_currentFrame()

    , m_multimediaMode(multimediaMode) {

  // Retrieve all fx nodes to be rendered in this process.

  scanSceneForRenderNodes();

}

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

MultimediaRenderer::Imp::~Imp() {}

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

void MultimediaRenderer::Imp::scanSceneForRenderNodes() {

  switch (m_multimediaMode) {

  case COLUMNS:

    scanSceneForColumns();

    break;

  case LAYERS:

    scanSceneForLayers();

    break;

  default:

    assert(0);

  }

}

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

//! Retrieve the first level of scene columns, climb their paths

//! along unary fxs, and then build the scene fxs.

void MultimediaRenderer::Imp::scanSceneForColumns() {

  // Retrieve the terminal fxs (ie, fxs which are implicitly

  // connected to the xsheet one)

  TXsheet *xsh = m_scene->getXsheet();

  TFxSet *fxs  = xsh->getFxDag()->getTerminalFxs();

  // Launch the recursive column climber procedure for each

  for (int i = 0; i < fxs->getFxCount(); ++i) {

    TFx *fx = fxs->getFx(i);

    if (!fx) continue;

    bool isItARenderFx = scanColsRecursive(fx);

    if (isItARenderFx) m_fxsToRender.addFx(fx);

  }

}

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

//! Returns true if the passed fx is a valid column representant

bool MultimediaRenderer::Imp::scanColsRecursive(TFx *fx) {

  // Columns should return true - they are column representant

  if (dynamic_cast<tcolumnfx *="">(fx)) return true;</tcolumnfx>

  // Search columns in every port

  bool isChildAnFxRepres;

  for (int i = 0; i < fx->getInputPortCount(); ++i) {

    TFx *childFx = fx->getInputPort(i)->getFx();

    if (!childFx) continue;

    isChildAnFxRepres = scanColsRecursive(childFx);

    if (isChildAnFxRepres && fx->getInputPortCount() > 1)

      m_fxsToRender.addFx(childFx);

  }

  if (isChildAnFxRepres && fx->getInputPortCount() == 1) return true;

  return false;

}

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

//! Build the scene fx for each node below the xsheet one.

//! Remember that left xsheet ports must not be expanded.

void MultimediaRenderer::Imp::scanSceneForLayers() {

  // Retrieve the terminal fxs (ie, fxs which are implicitly

  // connected to the xsheet one)

  TXsheet *xsh = m_scene->getXsheet();

  TFxSet *fxs  = xsh->getFxDag()->getTerminalFxs();

  // Examine all of them and - eventually - expand left xsheet

  // ports (ie fx nodes who allow implicit overlaying)

  for (int i = 0; i < fxs->getFxCount(); ++i) {

    TFx *fx = fxs->getFx(i);

    TFxPort *leftXSheetPort;

  retry:

    if (!fx) continue;

    leftXSheetPort = fx->getXsheetPort();

    if (!leftXSheetPort) {

      m_fxsToRender.addFx(fx);

      continue;

    }

    // If the leftXSheetPort is not connected, retry on port 0

    if (leftXSheetPort->isConnected())

      m_fxsToRender.addFx(fx);

    else {

      fx = fx->getInputPort(0)->getFx();

      goto retry;

    }

  }

}

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

TColumnFx *MultimediaRenderer::Imp::searchColumn(TFxP fx) {

  // Descend ports 0 until a TColumnFx is found. Then, output its number.

  TFx *currFx      = fx.getPointer();

  TColumnFx *colFx = dynamic_cast<tcolumnfx *="">(currFx);</tcolumnfx>

  while (!colFx) {

    if (fx->getInputPortCount() <= 0) break;

    currFx = currFx->getInputPort(0)->getFx();

    if (!currFx) break;

    colFx = dynamic_cast<tcolumnfx *="">(currFx);</tcolumnfx>

  }

  return colFx;

}

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

TFxP MultimediaRenderer::Imp::addPostProcessing(TFxP fx, TFxP postProc) {

  if (dynamic_cast<txsheetfx *="">(postProc.getPointer())) return fx;</txsheetfx>

  // Clone the postProcessing tree and substitute recursively

  postProc = postProc->clone(true);

  addPostProcessingRecursive(fx, postProc);

  return postProc;

}

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

void MultimediaRenderer::Imp::addPostProcessingRecursive(TFxP fx,

                                                         TFxP postProc) {

  if (!postProc) return;

  int i, count = postProc->getInputPortCount();

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

    TFxPort *port = postProc->getInputPort(i);

    TFx *childFx  = port->getFx();

    if (dynamic_cast<txsheetfx *="">(childFx))</txsheetfx>

      port->setFx(fx.getPointer());

    else

      addPostProcessingRecursive(fx, childFx);

  }

}

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

void MultimediaRenderer::Imp::start() {

  // Retrieve some useful infos

  double stretchTo   = m_renderSettings.m_timeStretchTo;

  double stretchFrom = m_renderSettings.m_timeStretchFrom;

  double timeStretchFactor = stretchFrom / stretchTo;

  bool fieldRendering =

      m_renderSettings.m_fieldPrevalence != TRenderSettings::NoField;

  std::wstring modeStr;

  switch (m_multimediaMode) {

  case COLUMNS:

    modeStr = L"_col";

    break;

  case LAYERS:

    modeStr = L"_lay";

    break;

  default:

    assert(0);

  }

  // Build the post processing fxs tree

  std::vector<tfxp> postFxs(m_framesToRender.size());</tfxp>

  std::set<double>::iterator jt;</double>

  int j;

  for (j = 0, jt = m_framesToRender.begin(); jt != m_framesToRender.end();

       ++j, ++jt)

    postFxs[j] =

        buildPostSceneFx(m_scene, *jt, m_renderSettings.m_shrinkX,

                         false);  // Adds camera and camera dpi transforms

  // For each node to be rendered

  int i, count = m_fxsToRender.getFxCount();

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

    // In case the process has been canceled, return

    if (m_canceled) return;

    // Then, build the scene fx for each frame to be rendered

    std::vector<std::pair<double, tfxpair="">> pairsToBeRendered;</std::pair<double,>

    // NOTE: The above pairs should not be directly added to a previously

    // declared movierenderer,

    // since an output level would be created even before knowing if any cell to

    // be rendered is

    // actually available.

    const BSFX_Transforms_Enum transforms =    // Do NOT add camera and

        BSFX_Transforms_Enum(BSFX_COLUMN_TR);  // camera dpi transforms

    int j;

    for (j = 0, jt = m_framesToRender.begin(); jt != m_framesToRender.end();

         ++j, ++jt) {

      TFxPair fx;

      if (m_renderSettings.m_stereoscopic)

        m_scene->shiftCameraX(-m_renderSettings.m_stereoscopicShift / 2);

      fx.m_frameA =

          buildSceneFx(m_scene, *jt, 0, m_fxsToRender.getFx(i), transforms);

      if (m_renderSettings.m_stereoscopic) {

        m_scene->shiftCameraX(m_renderSettings.m_stereoscopicShift);

        fx.m_frameB =

            buildSceneFx(m_scene, *jt, 0, m_fxsToRender.getFx(i), transforms);

        m_scene->shiftCameraX(-m_renderSettings.m_stereoscopicShift / 2);

      } else if (fieldRendering)

        fx.m_frameB = buildSceneFx(m_scene, *jt + 0.5 * timeStretchFactor, 0,

                                   m_fxsToRender.getFx(i), transforms);

      else

        fx.m_frameB = TRasterFxP();

      // Substitute with the post-process...

      if (fx.m_frameA) fx.m_frameA = addPostProcessing(fx.m_frameA, postFxs[j]);

      if (fx.m_frameB) fx.m_frameB = addPostProcessing(fx.m_frameB, postFxs[j]);

      if (fx.m_frameA)  // Could be 0, if the corresponding cell is void / not

                        // rendered

        pairsToBeRendered.push_back(std::pair<double, tfxpair="">(*jt, fx));</double,>

    }

    if (pairsToBeRendered.size() == 0)

      continue;  // Could be, if no cell for this column was in the frame range.

    // Build the output name

    TColumnFx *colFx = searchColumn(m_fxsToRender.getFx(i));

    TFx *currFx      = m_fxsToRender.getFx(i);

    assert(colFx);

    if (!colFx) continue;

    int columnIndex = colFx->getColumnIndex();

    std::wstring columnName(colFx->getColumnName());

    std::wstring columnId(colFx->getColumnId());

    std::wstring fxName(currFx->getName());

    std::wstring fxNameNoSpaces(::removeSpaces(fxName));

    std::wstring fxId(currFx->getFxId());

    std::wstring fpName =

        m_fp.getWideName() + L"_" + columnName +

        (columnId == columnName ? L"" : L"(" + columnId + L")") +

        (fxId.empty()

             ? L""

             : L"_" + fxName +

                   (fxId == fxNameNoSpaces ? L"" : L"(" + fxId + L")"));

    TFilePath movieFp(m_fp.withName(fpName));

    // Initialize a MovieRenderer with our infos

    MovieRenderer movieRenderer(m_scene, movieFp, m_threadCount, false);

    movieRenderer.setRenderSettings(m_renderSettings);

    movieRenderer.setDpi(m_xDpi, m_yDpi);

    movieRenderer.enablePrecomputing(m_precomputingEnabled);

    movieRenderer.addListener(this);

    for (unsigned int j = 0; j < pairsToBeRendered.size(); ++j) {

      std::pair<double, tfxpair=""> ¤tPair = pairsToBeRendered[j];</double,>

      movieRenderer.addFrame(currentPair.first, currentPair.second);

    }

    // Finally, start rendering currently initialized MovieRenderer.

    m_currentFx        = i;

    m_currentFrame     = m_framesToRender.begin();

    m_currentTRenderer = movieRenderer.getTRenderer();

    movieRenderer.start();

    // I don't recall Toonz currently supports different, simultaneous rendering

    // processes.

    // However, one rendering process is supposed to be exhausting the machine's

    // resources

    // on its own - so, we'll just set up an idle (but GUI-reactive) loop here.

    // It will quit looping whenever the "onSequenceCompleted" notification gets

    // called.

    m_eventLoop.exec();

    //---------------------- Loops here --------------------------

  }

  // Lastly, inform everyone that rendering stopped

  onRenderCompleted();

}

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

bool MultimediaRenderer::Imp::onFrameCompleted(int frame) {

  // Inform all listeners

  for (unsigned int i = 0; i < m_listeners.size(); ++i)

    m_listeners[i]->onFrameCompleted(*m_currentFrame, m_currentFx);

  m_currentFrame++;

  return !m_canceled;

}

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

bool MultimediaRenderer::Imp::onFrameFailed(int frame, TException &e) {

  // Inform all listeners

  for (unsigned int i = 0; i < m_listeners.size(); ++i)

    m_listeners[i]->onFrameFailed(*m_currentFrame, m_currentFx, e);

  m_currentFrame++;

  return !m_canceled;

}

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

void MultimediaRenderer::Imp::onSequenceCompleted(const TFilePath &fp) {

  // Inform all listeners

  m_currentTRenderer = 0;

  for (unsigned int i = 0; i < m_listeners.size(); ++i)

    m_listeners[i]->onSequenceCompleted(m_currentFx);

  m_eventLoop.quit();

}

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

void MultimediaRenderer::Imp::onRenderCompleted() {

  for (unsigned int i = 0; i < m_listeners.size(); ++i)

    m_listeners[i]->onRenderCompleted();

}

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

//

//    MultimediaRenderer   class

//

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

MultimediaRenderer::MultimediaRenderer(ToonzScene *scene,

                                       const TFilePath &moviePath,

                                       int multimediaMode, int threadCount,

                                       bool cacheResults)

    : m_imp(new Imp(scene, moviePath, multimediaMode, threadCount,

                    cacheResults)) {

  m_imp->addRef();

}

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

MultimediaRenderer::~MultimediaRenderer() { m_imp->release(); }

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

const TFilePath &MultimediaRenderer::getFilePath() { return m_imp->m_fp; }

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

int MultimediaRenderer::getFrameCount() {

  return m_imp->m_framesToRender.size();

}

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

int MultimediaRenderer::getColumnsCount() {

  return m_imp->m_fxsToRender.getFxCount();

}

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

int MultimediaRenderer::getMultimediaMode() const {

  return m_imp->m_multimediaMode;

}

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

void MultimediaRenderer::setRenderSettings(

    const TRenderSettings &renderSettings) {

  // assert(m_imp->m_framesOnRendering.empty());

  m_imp->m_renderSettings = renderSettings;

}

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

void MultimediaRenderer::setDpi(double xDpi, double yDpi) {

  m_imp->m_xDpi = xDpi;

  m_imp->m_yDpi = yDpi;

}

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

void MultimediaRenderer::addListener(Listener *listener) {

  m_imp->m_listeners.push_back(listener);

}

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

void MultimediaRenderer::addFrame(double frame) {

  m_imp->m_framesToRender.insert(frame);

}

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

void MultimediaRenderer::enablePrecomputing(bool on) {

  m_imp->m_precomputingEnabled = on;

}

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

//!\b NOTE: Such render may vary from time to time, and even be 0 if no renderer

//! is currently

//! active, for example due to preprocessing states.

TRenderer *MultimediaRenderer::getTRenderer() {

  return m_imp->m_currentTRenderer;

}

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

bool MultimediaRenderer::isPrecomputingEnabled() const {

  return m_imp->m_precomputingEnabled;

}

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

void MultimediaRenderer::start() { m_imp->start(); }

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

void MultimediaRenderer::onCanceled() { m_imp->m_canceled = true; }

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

/*

bool MultimediaRenderer::done() const

{

  return true;

}

*/