/***************************************************************************
 *   Copyright (c) 2004 Jürgen Riegel <juergen.riegel@web.de>              *
 *                                                                         *
 *   This file is part of the FreeCAD CAx development system.              *
 *                                                                         *
 *   This library is free software; you can redistribute it and/or         *
 *   modify it under the terms of the GNU Library General Public           *
 *   License as published by the Free Software Foundation; either          *
 *   version 2 of the License, or (at your option) any later version.      *
 *                                                                         *
 *   This library  is distributed in the hope that it will be useful,      *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
 *   GNU Library General Public License for more details.                  *
 *                                                                         *
 *   You should have received a copy of the GNU Library General Public     *
 *   License along with this library; see the file COPYING.LIB. If not,    *
 *   write to the Free Software Foundation, Inc., 59 Temple Place,         *
 *   Suite 330, Boston, MA  02111-1307, USA                                *
 *                                                                         *
 ***************************************************************************/


#include "PreCompiled.h"

#ifndef _PreComp_
# include <BRep_Tool.hxx>
# include <Geom_Curve.hxx>
# include <TColgp_Array1OfPnt.hxx>
# include <TopoDS.hxx>
# include <TopExp_Explorer.hxx>
# include <Inventor/nodes/SoComplexity.h>
# include <Inventor/nodes/SoCoordinate3.h>
# include <Inventor/nodes/SoDrawStyle.h>
# include <Inventor/nodes/SoLineSet.h>
# include <Inventor/nodes/SoLocateHighlight.h>
# include <Inventor/nodes/SoMaterial.h>
# include <Inventor/nodes/SoTransform.h>
# include <Inventor/nodes/SoSphere.h>
# include <Inventor/events/SoMouseButtonEvent.h>
# include <Inventor/events/SoKeyboardEvent.h>
# include <Inventor/events/SoLocation2Event.h>
#endif

/// Here the FreeCAD includes sorted by Base,App,Gui......
#include <Base/Console.h>
#include <Base/Parameter.h>
#include <Base/Exception.h>
#include <Base/Sequencer.h>
#include <Gui/View3DInventorViewer.h>
#include <Gui/SoFCSelection.h>
#include <App/Application.h>

#include <Mod/Part/App/PartFeature.h>

#include "ViewProviderCurveNet.h"



using namespace PartGui;


//**************************************************************************
// Construction/Destruction

PROPERTY_SOURCE(PartGui::ViewProviderCurveNet,PartGui::ViewProviderPart)

       
ViewProviderCurveNet::ViewProviderCurveNet()
  : bInEdit(false),bMovePointMode(false),EdgeRoot(0),VertexRoot(0)
{
    LineWidth.setValue(4.0f);
    PointSize.setValue(0.05f);
    /*
    hGrp = App::GetApplication().GetParameterGroupByPath("User parameter:BaseApp/Preferences/Mod/Part");

    fMeshDeviation      = hGrp->GetFloat("MeshDeviation",0.2);
    bNoPerVertexNormals = hGrp->GetBool("NoPerVertexNormals",false);
    lHilightColor       = hGrp->GetInt ("HilightColor",0);
    bQualityNormals     = hGrp->GetBool("QualityNormals",false);
    */
}

ViewProviderCurveNet::~ViewProviderCurveNet()
{

}

void ViewProviderCurveNet::attach(App::DocumentObject *pcFeat)
{
    // call parent attach method
    ViewProviderGeometryObject::attach(pcFeat);

    // setup the root and material for the edges
    SoSeparator* ModeRoot = new SoSeparator();
    EdgeRoot = new SoSeparator();
    ModeRoot->addChild(EdgeRoot);
    EdgeRoot->addChild(pcLineStyle);  
    EdgeRoot->addChild(pcLineMaterial);  

    // setup the root and material for the vertexes
    VertexRoot = new SoSeparator();
    ModeRoot->addChild(VertexRoot);
    VertexRoot->addChild(pcPointMaterial);
    SoComplexity *copl = new SoComplexity();
    copl->value = (float)0.2;
    VertexRoot->addChild(copl);

    addDisplayMaskMode(ModeRoot, "Edge");
}

void ViewProviderCurveNet::updateData(const App::Property* prop)
{
    Gui::ViewProviderGeometryObject::updateData(prop);
    if (prop->getTypeId() == Part::PropertyPartShape::getClassTypeId()) {
        TopoDS_Shape cShape = static_cast<const Part::PropertyPartShape*>(prop)->getValue();
        if (cShape.IsNull())
            return;

        EdgeRoot->removeAllChildren();
        VertexRoot->removeAllChildren();

        try{
            computeEdges   (EdgeRoot,cShape);
            computeVertices(VertexRoot,cShape);
        }
        catch (...){
            Base::Console().Error("ViewProviderPart::create() Cannot compute Inventor representation for the actual shape");
        }
    }
}

void ViewProviderCurveNet::setDisplayMode(const char* ModeName)
{
    if ( strcmp("Edge",ModeName)==0 )
        setDisplayMaskMode("Edge");

    ViewProviderGeometryObject::setDisplayMode(ModeName);
}

std::vector<std::string> ViewProviderCurveNet::getDisplayModes(void) const
{
    // get the modes of the father
    std::vector<std::string> StrList;

    // add your own modes
    StrList.push_back("Edge");

    return StrList;
}

// **********************************************************************************

bool ViewProviderCurveNet::setEdit(int)
{
    bInEdit = true;
    return true;
    //getWidget()->setCursor( QCursor( 13 /*ArrowCursor*/) )
}

void ViewProviderCurveNet::unsetEdit(int)
{
    bInEdit = false;
}

bool ViewProviderCurveNet::handleEvent(const SoEvent * const ev, Gui::View3DInventorViewer &Viewer)
{
    SbVec3f point, norm;

    // get the position of the mouse
    const SbVec2s pos(ev->getPosition());

    // Keybooard events
    if (ev->getTypeId().isDerivedFrom(SoKeyboardEvent::getClassTypeId())) {
        SoKeyboardEvent * ke = (SoKeyboardEvent *)ev;
        switch (ke->getKey()) {
            case SoKeyboardEvent::LEFT_ALT:
            case SoKeyboardEvent::RIGHT_ALT:
            case SoKeyboardEvent::LEFT_CONTROL:
            case SoKeyboardEvent::RIGHT_CONTROL:
            case SoKeyboardEvent::LEFT_SHIFT:
            case SoKeyboardEvent::RIGHT_SHIFT:
                break;
            default:
                break;
        }
    }

    // switching the mouse buttons
    if (ev->getTypeId().isDerivedFrom(SoMouseButtonEvent::getClassTypeId())) {
        const SoMouseButtonEvent * const event = (const SoMouseButtonEvent *) ev;
        const int button = event->getButton();
        const SbBool press = event->getState() == SoButtonEvent::DOWN ? true : false;

        // which button pressed?
        switch (button) {
            case SoMouseButtonEvent::BUTTON1:
                if (press) {
                    Base::Console().Log("ViewProviderCurveNet::handleEvent() press left\n");

                    bool bIsNode =  false;
                    for (std::list<Node>::iterator It = NodeList.begin();It != NodeList.end(); It++)
                    {
                        if (It->pcHighlight->isHighlighted())
                        {
                            bIsNode = true;
                            PointToMove = *It;
                            break;
                        }
                    }

                    if (bIsNode)
                    {
                        // set the provider in point move mode and remember the point
                        bMovePointMode = true;
                        // PointToMove = *It; ### Error 'It' is out of scope->move inside the loop

                        return true;
                    }
                    else if(Viewer.pickPoint(pos,point,norm))
                    {
                        Node n;
                        Base::Console().Log("Picked(%f,%f,%f)\n",point[0],point[1],point[2]);

                        SoSeparator *TransRoot = new SoSeparator();
                        n.pcTransform          = new SoTransform();
                        TransRoot->addChild(n.pcTransform);
                        n.pcTransform->translation.setValue(point);
                        n.pcHighlight          = new Gui::SoFCSelection();
                        SoSphere * sphere      = new SoSphere;
                        sphere->radius = (float)pcLineStyle->pointSize.getValue();
                        n.pcHighlight->addChild(sphere);
                        TransRoot->addChild(n.pcHighlight);
                        VertexRoot->addChild(TransRoot);

                        NodeList.push_back(n);
      
                        return true;
                    }
                }
                else // if(pressd)..
                {
                    if (bMovePointMode)
                    {
                        bMovePointMode = false;
                        return true;
                    }
                }
            break;
        }
    }

    // Mouse Movement handling
    if (ev->getTypeId().isDerivedFrom(SoLocation2Event::getClassTypeId())) {
        //    const SoLocation2Event * const event = (const SoLocation2Event *) ev;

        if (bMovePointMode && Viewer.pickPoint(pos,point,norm) ){
            PointToMove.pcTransform->translation.setValue(point);     
            return true;
        }
    }

    // event not processed
    return false;
}

Standard_Boolean ViewProviderCurveNet::computeEdges(SoSeparator* root, const TopoDS_Shape &myShape)
{
    unsigned long ulNbOfPoints = 50;

    TopExp_Explorer ex;
    SoSeparator *EdgeRoot = new SoSeparator();
    root->addChild(EdgeRoot);

    EdgeRoot->addChild(pcLineStyle);  
    EdgeRoot->addChild(pcLineMaterial);  

    for (ex.Init(myShape, TopAbs_EDGE); ex.More(); ex.Next())
    {
        // get the shape and mesh it
        const TopoDS_Edge& aEdge = TopoDS::Edge(ex.Current());

        Standard_Real fBegin, fEnd;
        SbVec3f* vertices = new SbVec3f[ulNbOfPoints];

        Handle(Geom_Curve) hCurve = BRep_Tool::Curve(aEdge,fBegin,fEnd);
        float fLen   = float(fEnd - fBegin);

        for (unsigned long i = 0; i < ulNbOfPoints; i++)
        {
            gp_Pnt gpPt = hCurve->Value(fBegin + (fLen * float(i)) / float(ulNbOfPoints-1));
            vertices[i].setValue((float)(gpPt.X()),(float)(gpPt.Y()),(float)(gpPt.Z()));
        }

        // define vertices
        SoCoordinate3 * coords = new SoCoordinate3;
        coords->point.setValues(0,ulNbOfPoints, vertices);
        EdgeRoot->addChild(coords);

        // define the indexed face set
        SoLocateHighlight* h = new SoLocateHighlight();
        h->color.setValue((float)0.2,(float)0.5,(float)0.2);

        SoLineSet * lineset = new SoLineSet;
        h->addChild(lineset);
        EdgeRoot->addChild(h);
    }

    return true;
}

Standard_Boolean ViewProviderCurveNet::computeVertices(SoSeparator* root, const TopoDS_Shape &myShape)
{
    TopExp_Explorer ex;
    SoSeparator *VertexRoot = new SoSeparator();
    root->addChild(VertexRoot);

    VertexRoot->addChild(pcPointMaterial);

    SoComplexity *copl = new SoComplexity();
    copl->value = (float)0.2;
    VertexRoot->addChild(copl);

    for (ex.Init(myShape, TopAbs_VERTEX); ex.More(); ex.Next())
    {
        // get the shape 
        const TopoDS_Vertex& aVertex = TopoDS::Vertex(ex.Current());
        gp_Pnt gpPt = BRep_Tool::Pnt (aVertex);

        SoSeparator *TransRoot = new SoSeparator();
        SoTransform *Trans     = new SoTransform();
        TransRoot->addChild(Trans);
        Trans->translation.setValue((float)(gpPt.X()),(float)(gpPt.Y()),(float)(gpPt.Z()));

        SoLocateHighlight* h = new SoLocateHighlight();
        h->color.setValue((float)0.2,(float)0.5,(float)0.2);

        SoSphere * sphere = new SoSphere;
        sphere->radius = (float)pcPointStyle->pointSize.getValue();

        h->addChild(sphere);
        TransRoot->addChild(h);
        VertexRoot->addChild(TransRoot);
    }

    return true;
}