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

   Program: ParaView
   Module:  pqModelTransformSupportBehavior.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 "pqModelTransformSupportBehavior.h"

#include "pqApplicationCore.h"
#include "pqDataRepresentation.h"
#include "pqPipelineSource.h"
#include "pqServerManagerModel.h"
#include "pqView.h"
#include "vtkDataObject.h"
#include "vtkPVArrayInformation.h"
#include "vtkPVDataInformation.h"
#include "vtkSMProperty.h"
#include "vtkSMPropertyHelper.h"
#include "vtkSMSourceProxy.h"
#include "vtkTuple.h"

#include <QtDebug>

#include <cassert>

namespace
{
static vtkSMSourceProxy* FindVisibleProducerWithChangeOfBasisMatrix(pqView* view)
{
  foreach (pqRepresentation* repr, view->getRepresentations())
  {
    pqDataRepresentation* drepr = qobject_cast<pqDataRepresentation*>(repr);
    if (!drepr || !drepr->isVisible())
    {
      continue;
    }

    vtkPVDataInformation* info = drepr->getInputDataInformation();
    vtkPVArrayInformation* cobm =
      info->GetArrayInformation("ChangeOfBasisMatrix", vtkDataObject::FIELD);
    vtkPVArrayInformation* bbimc = cobm
      ? info->GetArrayInformation("BoundingBoxInModelCoordinates", vtkDataObject::FIELD)
      : NULL;
    if (cobm && bbimc)
    {
      return vtkSMSourceProxy::SafeDownCast(drepr->getInput()->getProxy());
    }
  }
  return NULL;
}

/// Changes the title property iff its value wasn't explicitly changed by the user.
/// If value is NULL, we restore the property default else the property is set to
/// the specified value.
void SafeSetAxisTitle(vtkSMProxy* gridAxis, const char* pname, const char* value)
{
  vtkSMProperty* prop = gridAxis->GetProperty(pname);
  assert(prop);

  vtkSMPropertyHelper helper(prop);

  QString key = QString("MTSBAutoTitle.%1").arg(pname);
  if (prop->IsValueDefault() ||
    (gridAxis->HasAnnotation(key.toLocal8Bit().data()) &&
        strcmp(gridAxis->GetAnnotation(key.toLocal8Bit().data()), helper.GetAsString()) == 0))
  {
    if (value)
    {
      helper.Set(value);
      gridAxis->SetAnnotation(key.toLocal8Bit().data(), value);
    }
    else
    {
      prop->ResetToDefault();
      gridAxis->RemoveAnnotation(key.toLocal8Bit().data());
    }
  }
}
}

//-----------------------------------------------------------------------------
pqModelTransformSupportBehavior::pqModelTransformSupportBehavior(QObject* parentObject)
  : Superclass(parentObject)
{
  pqServerManagerModel* smmodel = pqApplicationCore::instance()->getServerManagerModel();
  this->connect(smmodel, SIGNAL(viewAdded(pqView*)), SLOT(viewAdded(pqView*)));
  foreach (pqView* view, smmodel->findItems<pqView*>())
  {
    this->viewAdded(view);
  }
}

//-----------------------------------------------------------------------------
pqModelTransformSupportBehavior::~pqModelTransformSupportBehavior()
{
}

//-----------------------------------------------------------------------------
void pqModelTransformSupportBehavior::viewAdded(pqView* view)
{
  if (view)
  {
    this->connect(view, SIGNAL(updateDataEvent()), SLOT(viewUpdated()));
  }
}

//-----------------------------------------------------------------------------
void pqModelTransformSupportBehavior::viewUpdated()
{
  pqView* view = qobject_cast<pqView*>(this->sender());
  assert(view);

  // Check if there is any data source visible in the view that has a
  // ChangeOfBasisMatrix and BoundingBoxInModelCoordinates specified.
  if (vtkSMSourceProxy* producer = FindVisibleProducerWithChangeOfBasisMatrix(view))
  {
    this->enableModelTransform(view, producer);
  }
  else
  {
    this->disableModelTransform(view);
  }
}

//-----------------------------------------------------------------------------
void pqModelTransformSupportBehavior::enableModelTransform(pqView* view, vtkSMSourceProxy* producer)
{
  bool are_titles_valid;
  vtkTuple<vtkStdString, 3> titles = this->getAxisTitles(producer, 0, &are_titles_valid);

  if (vtkSMProxy* gridAxes3DActor =
        vtkSMPropertyHelper(view->getProxy(), "AxesGrid", /*quiet*/ true).GetAsProxy())
  {
    vtkSMPropertyHelper(gridAxes3DActor, "UseModelTransform").Set(1);
    vtkTuple<double, 16> cobm = this->getChangeOfBasisMatrix(producer);
    vtkTuple<double, 6> bounds = this->getBoundingBoxInModelCoordinates(producer);
    vtkSMPropertyHelper(gridAxes3DActor, "ModelTransformMatrix").Set(cobm.GetData(), 16);
    vtkSMPropertyHelper(gridAxes3DActor, "ModelBounds").Set(bounds.GetData(), 6);

    if (are_titles_valid)
    {
      SafeSetAxisTitle(gridAxes3DActor, "XTitle", titles[0].c_str());
      SafeSetAxisTitle(gridAxes3DActor, "YTitle", titles[1].c_str());
      SafeSetAxisTitle(gridAxes3DActor, "ZTitle", titles[2].c_str());
    }
    else
    {
      // clear data-dependent axis titles.
      SafeSetAxisTitle(gridAxes3DActor, "XTitle", NULL);
      SafeSetAxisTitle(gridAxes3DActor, "YTitle", NULL);
      SafeSetAxisTitle(gridAxes3DActor, "ZTitle", NULL);
    }
    gridAxes3DActor->UpdateVTKObjects();
  }

  if (are_titles_valid)
  {
    vtkSMProxy* viewProxy = view->getProxy();
    vtkSMPropertyHelper(viewProxy, "XTitle", /*quiet*/ true).Set(titles[0].c_str());
    vtkSMPropertyHelper(viewProxy, "YTitle", /*quiet*/ true).Set(titles[1].c_str());
    vtkSMPropertyHelper(viewProxy, "ZTitle", /*quiet*/ true).Set(titles[2].c_str());
    viewProxy->UpdateVTKObjects();
  }
}

//-----------------------------------------------------------------------------
void pqModelTransformSupportBehavior::disableModelTransform(pqView* view)
{
  if (vtkSMProxy* gridAxes3DActor =
        vtkSMPropertyHelper(view->getProxy(), "AxesGrid", /*quiet*/ true).GetAsProxy())
  {
    vtkSMPropertyHelper helper(gridAxes3DActor, "UseModelTransform");
    if (helper.GetAsInt() != 0)
    {
      helper.Set(0);
    }
    SafeSetAxisTitle(gridAxes3DActor, "XTitle", NULL);
    SafeSetAxisTitle(gridAxes3DActor, "YTitle", NULL);
    SafeSetAxisTitle(gridAxes3DActor, "ZTitle", NULL);
    gridAxes3DActor->UpdateVTKObjects();
  }
}

//-----------------------------------------------------------------------------
template <class T, int size>
vtkTuple<T, size> GetValues(const char* aname, vtkSMSourceProxy* producer, int port, bool* pisvalid)
{
  bool dummy;
  pisvalid = pisvalid ? pisvalid : &dummy;
  *pisvalid = false;

  vtkTuple<T, size> value;
  vtkPVDataInformation* dinfo = producer->GetDataInformation(port);
  if (vtkPVArrayInformation* ainfo =
        (dinfo ? dinfo->GetArrayInformation(aname, vtkDataObject::FIELD) : NULL))
  {
    if (ainfo->GetNumberOfComponents() == size)
    {
      *pisvalid = true;
      for (int cc = 0; cc < size; cc++)
      {
        value[cc] = ainfo->GetComponentRange(cc)[0];
      }
    }
  }
  return value;
}

//-----------------------------------------------------------------------------
vtkTuple<double, 16> pqModelTransformSupportBehavior::getChangeOfBasisMatrix(
  vtkSMSourceProxy* producer, int port, bool* pisvalid)
{
  return GetValues<double, 16>("ChangeOfBasisMatrix", producer, port, pisvalid);
}

//-----------------------------------------------------------------------------
vtkTuple<double, 6> pqModelTransformSupportBehavior::getBoundingBoxInModelCoordinates(
  vtkSMSourceProxy* producer, int port, bool* pisvalid)
{
  return GetValues<double, 6>("BoundingBoxInModelCoordinates", producer, port, pisvalid);
}

//-----------------------------------------------------------------------------
vtkTuple<vtkStdString, 3> pqModelTransformSupportBehavior::getAxisTitles(
  vtkSMSourceProxy* producer, int port, bool* pisvalid)
{
  bool dummy;
  pisvalid = pisvalid ? pisvalid : &dummy;
  *pisvalid = false;

  vtkTuple<vtkStdString, 3> value;
  vtkPVDataInformation* dinfo = producer->GetDataInformation(port);
  if (!dinfo)
  {
    return value;
  }

  vtkPVArrayInformation* xtitle = dinfo->GetArrayInformation("AxisTitleForX", vtkDataObject::FIELD);
  vtkPVArrayInformation* ytitle = dinfo->GetArrayInformation("AxisTitleForY", vtkDataObject::FIELD);
  vtkPVArrayInformation* ztitle = dinfo->GetArrayInformation("AxisTitleForZ", vtkDataObject::FIELD);
  if ((xtitle && xtitle->GetComponentName(0) == NULL) ||
    (ytitle && ytitle->GetComponentName(0) == NULL) ||
    (ztitle && ztitle->GetComponentName(0) == NULL))
  {
    qCritical() << "Mechanisms for specifying axis titles have changed. "
                   "Please contact the ParaView developers for more info.";
    return value;
  }

  *pisvalid = xtitle || ytitle || ztitle;
  if (xtitle && xtitle->GetComponentName(0))
  {
    value[0] = xtitle->GetComponentName(0);
  }
  if (ytitle && ytitle->GetComponentName(0))
  {
    value[1] = ytitle->GetComponentName(0);
  }
  if (ztitle && ztitle->GetComponentName(0))
  {
    value[2] = ztitle->GetComponentName(0);
  }
  return value;
}
