/***************************************************************************
 *   Copyright (c) 2013 Werner Mayer <wmayer[at]users.sourceforge.net>     *
 *                                                                         *
 *   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_Builder.hxx>
# include <TopoDS_Compound.hxx>
# include <TopExp.hxx>
# include <TopTools_IndexedMapOfShape.hxx>
# include <Standard_Failure.hxx>
#endif


#include "FeatureCompound.h"


using namespace Part;


PROPERTY_SOURCE(Part::Compound, Part::Feature)

Compound::Compound()
{
    ADD_PROPERTY(Links,(0));
    Links.setSize(0);
}

Compound::~Compound()
{
}

short Compound::mustExecute() const
{
    if (Links.isTouched())
        return 1;
    return 0;
}

App::DocumentObjectExecReturn *Compound::execute(void)
{
    try {
        std::vector<ShapeHistory> history;
        int countFaces = 0;

        BRep_Builder builder;
        TopoDS_Compound comp;
        builder.MakeCompound(comp);

        const std::vector<DocumentObject*>& links = Links.getValues();
        for (std::vector<DocumentObject*>::const_iterator it = links.begin(); it != links.end(); ++it) {
            if (*it && (*it)->getTypeId().isDerivedFrom(Part::Feature::getClassTypeId())) {
                Part::Feature* fea = static_cast<Part::Feature*>(*it);
                const TopoDS_Shape& sh = fea->Shape.getValue();
                if (!sh.IsNull()) {
                    builder.Add(comp, sh);
                    TopTools_IndexedMapOfShape faceMap;
                    TopExp::MapShapes(sh, TopAbs_FACE, faceMap);
                    ShapeHistory hist;
                    hist.type = TopAbs_FACE;
                    for (int i=1; i<=faceMap.Extent(); i++) {
                        hist.shapeMap[i-1].push_back(countFaces++);
                    }
                    history.push_back(hist);
                }
            }
        }

        this->Shape.setValue(comp);

        // make sure the 'PropertyShapeHistory' is not safed in undo/redo (#0001889)
        PropertyShapeHistory prop;
        prop.setValues(history);
        prop.setContainer(this);
        prop.touch();

        return App::DocumentObject::StdReturn;
    }
    catch (Standard_Failure) {
        Handle_Standard_Failure e = Standard_Failure::Caught();
        return new App::DocumentObjectExecReturn(e->GetMessageString());
    }
}