/*=========================================================================

   Program: ParaView
   Module:  pqCoordinateFramePropertyWidget.cxx

   Copyright (c) 2005,2006 Sandia Corporation, Kitware Inc.
   All rights reserved.

   ParaView is a free software; you can redistribute it and/or modify it
   under the terms of the ParaView license version 1.2.

   See License_v1.2.txt for the full ParaView license.
   A copy of this license can be obtained by contacting
   Kitware Inc.
   28 Corporate Drive
   Clifton Park, NY 12065
   USA

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR
CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

========================================================================*/
#include "pqCoordinateFramePropertyWidget.h"
#include "ui_pqCoordinateFramePropertyWidget.h"

#include "pqActiveObjects.h"
#include "pqPointPickingHelper.h"
#include "pqRenderView.h"

#include "vtkCamera.h"
#include "vtkSMDomain.h"
#include "vtkSMDoubleVectorProperty.h"
#include "vtkSMIntVectorProperty.h"
#include "vtkSMNewWidgetRepresentationProxy.h"
#include "vtkSMProperty.h"
#include "vtkSMPropertyGroup.h"
#include "vtkSMPropertyHelper.h"
#include "vtkSMRenderViewProxy.h"
#include "vtkVector.h"
#include "vtkVectorOperators.h"

#include <QComboBox>
#include <QMenu>

namespace
{
// Divide the vector by its length (if non-zero), returning true if non-zero.
template <typename T, std::size_t N>
bool normalize(std::array<T, N>& vec)
{
  T mag = 0.;
  for (std::size_t ii = 0; ii < N; ++ii)
  {
    mag += vec[ii] * vec[ii];
  }
  mag = std::sqrt(mag);
  if (mag < 1e-8)
  {
    return false;
  }
  for (std::size_t ii = 0; ii < N; ++ii)
  {
    vec[ii] /= mag;
  }
  return true;
}

// Avoid any dimension having an extent of 0;
// ensure that each dimension has some thickness and then scale.
static void pqAdjustBounds(vtkBoundingBox& bbox, double scaleFactor)
{
  double max_length = bbox.GetMaxLength();
  max_length = max_length > 0 ? max_length * 0.05 : 1;
  double min_point[3], max_point[3];
  bbox.GetMinPoint(min_point[0], min_point[1], min_point[2]);
  bbox.GetMaxPoint(max_point[0], max_point[1], max_point[2]);
  for (int cc = 0; cc < 3; cc++)
  {
    if (bbox.GetLength(cc) == 0)
    {
      min_point[cc] -= max_length;
      max_point[cc] += max_length;
    }

    double mid = (min_point[cc] + max_point[cc]) / 2.0;
    min_point[cc] = mid + scaleFactor * (min_point[cc] - mid);
    max_point[cc] = mid + scaleFactor * (max_point[cc] - mid);
  }
  bbox.SetMinPoint(min_point);
  bbox.SetMaxPoint(max_point);
}
}

pqCoordinateFramePropertyWidget::pqCoordinateFramePropertyWidget(
  vtkSMProxy* smproxy, vtkSMPropertyGroup* smgroup, QWidget* parentObject)
  : Superclass(
      "representations", "CoordinateFrameWidgetRepresentation", smproxy, smgroup, parentObject)
{
  Ui::CoordinateFramePropertyWidget ui;
  ui.setupUi(this);

  if (this->widgetProxy()->GetProperty("LockedAxis"))
  {
    vtkSMProperty* lockAxisInfo = this->widgetProxy()->GetProperty("LockedAxisInfo");
    this->addPropertyLink(this, "lockedAxis", SIGNAL(lockedAxisChangedByUser(int)), lockAxisInfo);
    QObject::connect(ui.lockAxis, QOverload<int>::of(&QComboBox::currentIndexChanged), this,
      &pqCoordinateFramePropertyWidget::currentIndexChangedLockAxis);
  }
  else
  {
    qCritical("Missing required property for 'LockedAxis' to function.");
    ui.lockAxis->hide();
  }

  if (vtkSMProperty* origin = smgroup->GetProperty("Origin"))
  {
    this->addPropertyLink(ui.originX, "text2", SIGNAL(textChangedAndEditingFinished()), origin, 0);
    this->addPropertyLink(ui.originY, "text2", SIGNAL(textChangedAndEditingFinished()), origin, 1);
    this->addPropertyLink(ui.originZ, "text2", SIGNAL(textChangedAndEditingFinished()), origin, 2);
    auto* originInfo = dynamic_cast<vtkSMDoubleVectorProperty*>(smgroup->GetProperty("OriginInfo"));
    if (originInfo)
    {
      this->addPropertyLink(
        ui.originX, "text2", SIGNAL(textChangedAndEditingFinished()), originInfo, 0);
      this->addPropertyLink(
        ui.originY, "text2", SIGNAL(textChangedAndEditingFinished()), originInfo, 1);
      this->addPropertyLink(
        ui.originZ, "text2", SIGNAL(textChangedAndEditingFinished()), originInfo, 2);
    }
    ui.labelOrigin->setText(QCoreApplication::translate("ServerManagerXML", origin->GetXMLLabel()));
    QString tooltip = this->getTooltip(origin);
    ui.originX->setToolTip(tooltip);
    ui.originY->setToolTip(tooltip);
    ui.originZ->setToolTip(tooltip);
    ui.labelOrigin->setToolTip(tooltip);
  }
  else
  {
    qCritical("Missing required property for function 'Origin'.");
  }

  if (vtkSMProperty* xAxis = smgroup->GetProperty("XAxis"))
  {
    this->addPropertyLink(ui.xAxisX, "text2", SIGNAL(blank()), xAxis, 0);
    this->addPropertyLink(ui.xAxisY, "text2", SIGNAL(blank()), xAxis, 1);
    this->addPropertyLink(ui.xAxisZ, "text2", SIGNAL(blank()), xAxis, 2);
    QObject::connect(
      ui.acceptXAxis, &QToolButton::clicked, this, &pqCoordinateFramePropertyWidget::setUserXAxis);
    auto* xAxisInfo = dynamic_cast<vtkSMDoubleVectorProperty*>(smgroup->GetProperty("XAxisInfo"));
    if (xAxisInfo)
    {
      this->addPropertyLink(ui.xAxisX, "text2", SIGNAL(blank()), xAxisInfo, 0);
      this->addPropertyLink(ui.xAxisY, "text2", SIGNAL(blank()), xAxisInfo, 1);
      this->addPropertyLink(ui.xAxisZ, "text2", SIGNAL(blank()), xAxisInfo, 2);
    }
    ui.labelXAxis->setText(QCoreApplication::translate("ServerManagerXML", xAxis->GetXMLLabel()));
    QString tooltip = this->getTooltip(xAxis);
    ui.xAxisX->setToolTip(tooltip);
    ui.xAxisY->setToolTip(tooltip);
    ui.xAxisZ->setToolTip(tooltip);
    ui.labelXAxis->setToolTip(tooltip);
  }
  else
  {
    qCritical("Missing required property for function 'XAxis'.");
  }

  if (vtkSMProperty* yAxis = smgroup->GetProperty("YAxis"))
  {
    this->addPropertyLink(ui.yAxisX, "text2", SIGNAL(blank()), yAxis, 0);
    this->addPropertyLink(ui.yAxisY, "text2", SIGNAL(blank()), yAxis, 1);
    this->addPropertyLink(ui.yAxisZ, "text2", SIGNAL(blank()), yAxis, 2);
    QObject::connect(
      ui.acceptYAxis, &QToolButton::clicked, this, &pqCoordinateFramePropertyWidget::setUserYAxis);
    auto* yAxisInfo = dynamic_cast<vtkSMDoubleVectorProperty*>(smgroup->GetProperty("XAxisInfo"));
    if (yAxisInfo)
    {
      this->addPropertyLink(ui.yAxisX, "text2", SIGNAL(blank()), yAxisInfo, 0);
      this->addPropertyLink(ui.yAxisY, "text2", SIGNAL(blank()), yAxisInfo, 1);
      this->addPropertyLink(ui.yAxisZ, "text2", SIGNAL(blank()), yAxisInfo, 2);
    }
    ui.labelYAxis->setText(QCoreApplication::translate("ServerManagerXML", yAxis->GetXMLLabel()));
    QString tooltip = this->getTooltip(yAxis);
    ui.yAxisX->setToolTip(tooltip);
    ui.yAxisY->setToolTip(tooltip);
    ui.yAxisZ->setToolTip(tooltip);
    ui.labelYAxis->setToolTip(tooltip);
  }
  else
  {
    qCritical("Missing required property for function 'YAxis'.");
  }

  if (vtkSMProperty* zAxis = smgroup->GetProperty("ZAxis"))
  {
    this->addPropertyLink(ui.zAxisX, "text2", SIGNAL(blank()), zAxis, 0);
    this->addPropertyLink(ui.zAxisY, "text2", SIGNAL(blank()), zAxis, 1);
    this->addPropertyLink(ui.zAxisZ, "text2", SIGNAL(blank()), zAxis, 2);
    QObject::connect(
      ui.acceptZAxis, &QToolButton::clicked, this, &pqCoordinateFramePropertyWidget::setUserZAxis);
    auto* zAxisInfo = dynamic_cast<vtkSMDoubleVectorProperty*>(smgroup->GetProperty("XAxisInfo"));
    if (zAxisInfo)
    {
      this->addPropertyLink(ui.zAxisX, "text2", SIGNAL(blank()), zAxisInfo, 0);
      this->addPropertyLink(ui.zAxisY, "text2", SIGNAL(blank()), zAxisInfo, 1);
      this->addPropertyLink(ui.zAxisZ, "text2", SIGNAL(blank()), zAxisInfo, 2);
    }
    ui.labelZAxis->setText(QCoreApplication::translate("ServerManagerXML", zAxis->GetXMLLabel()));
    QString tooltip = this->getTooltip(zAxis);
    ui.zAxisX->setToolTip(tooltip);
    ui.zAxisY->setToolTip(tooltip);
    ui.zAxisZ->setToolTip(tooltip);
    ui.labelZAxis->setToolTip(tooltip);
  }
  else
  {
    qCritical("Missing required property for function 'XAxis'.");
  }

  // link a few buttons
  this->connect(ui.actionAlignToWorldX, SIGNAL(triggered()), SLOT(useXNormal()));
  this->connect(ui.actionAlignToWorldY, SIGNAL(triggered()), SLOT(useYNormal()));
  this->connect(ui.actionAlignToWorldZ, SIGNAL(triggered()), SLOT(useZNormal()));
  this->connect(ui.actionAxisAlignWorld, SIGNAL(triggered()), SLOT(resetToWorldXYZ()));
  this->connect(ui.actionAlignToCameraOut, SIGNAL(triggered()), SLOT(useCameraNormal()));
  this->connect(ui.actionAlignCameraToAxis, SIGNAL(triggered()), SLOT(resetCameraToNormal()));
  ui.actionRecenterOnBounds->setEnabled(false);
  this->connect(ui.actionRecenterOnBounds, SIGNAL(triggered()), SLOT(resetToDataBounds()));

  auto actionMenu = new QMenu(tr("Coordinate frame utilities"));
  actionMenu->addAction(ui.actionAlignToWorldX);
  actionMenu->addAction(ui.actionAlignToWorldY);
  actionMenu->addAction(ui.actionAlignToWorldZ);
  actionMenu->addAction(ui.actionAxisAlignWorld);
  actionMenu->addAction(ui.actionAlignToCameraOut);
  actionMenu->addAction(ui.actionAlignCameraToAxis);
  // actionMenu->addAction(ui.actionRecenterOnBounds);
  ui.actionButton->setMenu(actionMenu);

  // link show3DWidget checkbox
  this->connect(ui.show3DWidget, SIGNAL(toggled(bool)), SLOT(setWidgetVisible(bool)));
  ui.show3DWidget->connect(this, SIGNAL(widgetVisibilityToggled(bool)), SLOT(setChecked(bool)));
  this->setWidgetVisible(ui.show3DWidget->isChecked());

  using PickOption = pqPointPickingHelper::PickOption;

  // picking origin point actions
  pqPointPickingHelper* pickPointHelper =
    new pqPointPickingHelper(QKeySequence(tr("P")), false, this, PickOption::Coordinates);
  pickPointHelper->connect(this, SIGNAL(viewChanged(pqView*)), SLOT(setView(pqView*)));
  this->connect(
    pickPointHelper, SIGNAL(pick(double, double, double)), SLOT(setOrigin(double, double, double)));

  pqPointPickingHelper* pickPointHelper2 =
    new pqPointPickingHelper(QKeySequence(tr("Ctrl+P")), true, this, PickOption::Coordinates);
  pickPointHelper2->connect(this, SIGNAL(viewChanged(pqView*)), SLOT(setView(pqView*)));
  this->connect(pickPointHelper2, SIGNAL(pick(double, double, double)),
    SLOT(setOrigin(double, double, double)));

  // picking normal actions
  pqPointPickingHelper* pickNormalHelper =
    new pqPointPickingHelper(QKeySequence(tr("N")), false, this, PickOption::Normal);
  pickNormalHelper->connect(this, SIGNAL(viewChanged(pqView*)), SLOT(setView(pqView*)));
  this->connect(pickNormalHelper, SIGNAL(pick(double, double, double)),
    SLOT(setNormal(double, double, double)));

  pqPointPickingHelper* pickNormalHelper2 =
    new pqPointPickingHelper(QKeySequence(tr("Ctrl+N")), true, this, PickOption::Normal);
  pickNormalHelper2->connect(this, SIGNAL(viewChanged(pqView*)), SLOT(setView(pqView*)));
  this->connect(pickNormalHelper2, SIGNAL(pick(double, double, double)),
    SLOT(setNormal(double, double, double)));

  // picking direction actions
  pqPointPickingHelper* pickDirectionHelper =
    new pqPointPickingHelper(QKeySequence(tr("T")), false, this, PickOption::Coordinates);
  pickDirectionHelper->connect(this, SIGNAL(viewChanged(pqView*)), SLOT(setView(pqView*)));
  this->connect(pickDirectionHelper, SIGNAL(pick(double, double, double)),
    SLOT(setDirection(double, double, double)));

  pqPointPickingHelper* pickDirectionHelper2 =
    new pqPointPickingHelper(QKeySequence(tr("Ctrl+T")), true, this, PickOption::Coordinates);
  pickDirectionHelper2->connect(this, SIGNAL(viewChanged(pqView*)), SLOT(setView(pqView*)));
  this->connect(pickDirectionHelper2, SIGNAL(pick(double, double, double)),
    SLOT(setDirection(double, double, double)));

  QObject::connect(&pqActiveObjects::instance(), &pqActiveObjects::dataUpdated, this,
    &pqCoordinateFramePropertyWidget::placeWidget);
}

pqCoordinateFramePropertyWidget::~pqCoordinateFramePropertyWidget() = default;

void pqCoordinateFramePropertyWidget::placeWidget()
{
  vtkBoundingBox bbox = this->dataBounds();
  if (!bbox.IsValid())
  {
    return;
  }

  vtkSMNewWidgetRepresentationProxy* wdgProxy = this->widgetProxy();
  double scaleFactor = vtkSMPropertyHelper(wdgProxy, "PlaceFactor").GetAsDouble();
  pqAdjustBounds(bbox, scaleFactor);
  double bds[6];
  bbox.GetBounds(bds);
  vtkSMPropertyHelper(wdgProxy, "WidgetBounds").Set(bds, 6);
  wdgProxy->UpdateVTKObjects();
}

int pqCoordinateFramePropertyWidget::getLockedAxis() const
{
  auto* combo = this->findChild<QComboBox*>("lockAxis");
  int lockAxis = combo->currentIndex() - 1;
  return lockAxis;
}

void pqCoordinateFramePropertyWidget::setLockedAxis(int lockedAxis)
{
  auto* combo = this->findChild<QComboBox*>("lockAxis");
  int prior = combo->currentIndex() - 1;
  if (lockedAxis != prior)
  {
    combo->setCurrentIndex(lockedAxis + 1);
  }
}

void pqCoordinateFramePropertyWidget::resetToWorldXYZ()
{
  vtkSMProxy* wdgProxy = this->widgetProxy();
  wdgProxy->InvokeCommand("ResetAxes");
  wdgProxy->UpdatePropertyInformation();
  Q_EMIT this->changeAvailable();
  this->render();
}

void pqCoordinateFramePropertyWidget::resetToDataBounds()
{
  vtkBoundingBox bbox = this->dataBounds();

  if (bbox.IsValid())
  {
    vtkSMNewWidgetRepresentationProxy* wdgProxy = this->widgetProxy();
    double scaleFactor = vtkSMPropertyHelper(wdgProxy, "PlaceFactor").GetAsDouble();
    pqAdjustBounds(bbox, scaleFactor);
    double origin[3];
    bbox.GetCenter(origin);
    vtkSMPropertyHelper(wdgProxy, "Origin").Set(origin, 3);
    wdgProxy->UpdateVTKObjects();
    Q_EMIT this->changeAvailable();
    this->render();
  }
}

void pqCoordinateFramePropertyWidget::resetCameraToNormal()
{
  if (pqRenderView* renView = qobject_cast<pqRenderView*>(this->view()))
  {
    vtkCamera* camera = renView->getRenderViewProxy()->GetActiveCamera();
    vtkSMProxy* wdgProxy = this->widgetProxy();
    vtkVector3d ax[3];
    vtkVector3d up;
    vtkVector3d dr;
    camera->GetDirectionOfProjection(dr.GetData());
    camera->GetViewUp(up.GetData());
    vtkSMPropertyHelper(wdgProxy, "XAxis").Get(ax[0].GetData(), 3);
    vtkSMPropertyHelper(wdgProxy, "YAxis").Get(ax[1].GetData(), 3);
    vtkSMPropertyHelper(wdgProxy, "ZAxis").Get(ax[2].GetData(), 3);
    // Find axis closest to current camera direction.
    int bestAxis = -1;
    bool flip = false;
    double bestProjection = -1.0;
    for (int ii = 0; ii < 3; ++ii)
    {
      double projection = ax[ii].Dot(dr);
      if (std::abs(projection) > bestProjection)
      {
        bestAxis = ii;
        bestProjection = std::abs(projection);
        // Flip the axis by default so we look toward it rather than along it
        // (assuming the base point is in the view frustum).
        flip = (std::abs(projection) > projection);
      }
    }
    dr = flip ? -ax[bestAxis] : ax[bestAxis];
    // The up vector should be aligned with the next coordinate axis in the cycle:
    int bestUp = (bestAxis + 1) % 3;
    // Flip the coordinate axis to best align with the previous up vector,
    // then assign it to the camera up-vector:
    up = (ax[bestUp].Dot(up) < 0.0) ? -ax[bestUp] : ax[bestUp];
    renView->resetViewDirection(dr[0], dr[1], dr[2], up[0], up[1], up[2]);
    renView->render();
  }
}

void pqCoordinateFramePropertyWidget::useCameraNormal()
{
  vtkSMRenderViewProxy* viewProxy =
    this->view() ? vtkSMRenderViewProxy::SafeDownCast(this->view()->getProxy()) : nullptr;
  if (viewProxy)
  {
    vtkCamera* camera = viewProxy->GetActiveCamera();

    double camera_normal[3];
    camera->GetViewPlaneNormal(camera_normal);
    camera_normal[0] = -camera_normal[0];
    camera_normal[1] = -camera_normal[1];
    camera_normal[2] = -camera_normal[2];
    this->setNormal(camera_normal[0], camera_normal[1], camera_normal[2]);
  }
}

void pqCoordinateFramePropertyWidget::setUserXAxis()
{
  this->setUserAxis(0);
}

void pqCoordinateFramePropertyWidget::setUserYAxis()
{
  this->setUserAxis(1);
}

void pqCoordinateFramePropertyWidget::setUserZAxis()
{
  this->setUserAxis(2);
}

void pqCoordinateFramePropertyWidget::setUserAxis(int axisIndex)
{
  vtkSMProxy* wdgProxy = this->widgetProxy();
  std::array<double, 3> axis;
  switch (axisIndex)
  {
    default: // fall through
    case 0:
      axis[0] = this->findChild<pqDoubleLineEdit*>("xAxisX")->text().toDouble();
      axis[1] = this->findChild<pqDoubleLineEdit*>("xAxisY")->text().toDouble();
      axis[2] = this->findChild<pqDoubleLineEdit*>("xAxisZ")->text().toDouble();
      normalize(axis);
      vtkSMPropertyHelper(wdgProxy, "XAxis").Set(axis.data(), 3);
      break;
    case 1:
      axis[0] = this->findChild<pqDoubleLineEdit*>("yAxisX")->text().toDouble();
      axis[1] = this->findChild<pqDoubleLineEdit*>("yAxisY")->text().toDouble();
      axis[2] = this->findChild<pqDoubleLineEdit*>("yAxisZ")->text().toDouble();
      normalize(axis);
      vtkSMPropertyHelper(wdgProxy, "YAxis").Set(axis.data(), 3);
      break;
    case 2:
      axis[0] = this->findChild<pqDoubleLineEdit*>("zAxisX")->text().toDouble();
      axis[1] = this->findChild<pqDoubleLineEdit*>("zAxisY")->text().toDouble();
      axis[2] = this->findChild<pqDoubleLineEdit*>("zAxisZ")->text().toDouble();
      normalize(axis);
      vtkSMPropertyHelper(wdgProxy, "ZAxis").Set(axis.data(), 3);
      break;
  }
  wdgProxy->UpdateVTKObjects();
  wdgProxy->UpdatePropertyInformation();
  Q_EMIT this->changeAvailable();
  this->render();
}

void pqCoordinateFramePropertyWidget::setNormal(double wx, double wy, double wz)
{
  vtkSMProxy* wdgProxy = this->widgetProxy();
  double n[3] = { wx, wy, wz };
  vtkSMPropertyHelper(wdgProxy, "Normal").Set(n, 3);
  wdgProxy->UpdateVTKObjects();
  wdgProxy->UpdatePropertyInformation();
  Q_EMIT this->changeAvailable();
  this->render();
}

void pqCoordinateFramePropertyWidget::setDirection(double wx, double wy, double wz)
{
  vtkSMProxy* wdgProxy = this->widgetProxy();
  double n[3] = { wx, wy, wz };
  vtkSMPropertyHelper(wdgProxy, "Direction").Set(n, 3);
  wdgProxy->UpdateVTKObjects();
  wdgProxy->UpdatePropertyInformation();
  Q_EMIT this->changeAvailable();
  this->render();
}

void pqCoordinateFramePropertyWidget::setOrigin(double wx, double wy, double wz)
{
  vtkSMProxy* wdgProxy = this->widgetProxy();
  double o[3] = { wx, wy, wz };
  vtkSMPropertyHelper(wdgProxy, "Origin").Set(o, 3);
  wdgProxy->UpdateVTKObjects();
  Q_EMIT this->changeAvailable();
  this->render();
}

void pqCoordinateFramePropertyWidget::currentIndexChangedLockAxis(int lockAxis)
{
  --lockAxis; // Integer property values start at -1 (Axis::NONE), not 0.
  vtkSMNewWidgetRepresentationProxy* wdgProxy = this->widgetProxy();
  if (auto* lockProp = dynamic_cast<vtkSMIntVectorProperty*>(wdgProxy->GetProperty("LockedAxis")))
  {
    lockProp->SetImmediateUpdate(true);
    lockProp->SetElements1(lockAxis);
    this->lockedAxisChangedByUser(lockAxis);
  }
}
