/***************************************************************************
 *   Copyright (c) 2013 Jan Rheinländer <jrheinlaender[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 <gp_Pnt.hxx>
#include <gp_Pln.hxx>
#include <gp_Lin.hxx>
#include <TopoDS.hxx>
#include <BRepAdaptor_Surface.hxx>
#include <BRepAdaptor_Curve.hxx>
#include <Precision.hxx>
#endif

#include "FemConstraintBearing.h"

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

using namespace Fem;

PROPERTY_SOURCE(Fem::ConstraintBearing, Fem::Constraint);

ConstraintBearing::ConstraintBearing()
{
    ADD_PROPERTY_TYPE(Location,(0),"ConstraintBearing",(App::PropertyType)(App::Prop_None),
                      "Element giving axial location of constraint");
    ADD_PROPERTY(Dist,(0.0));
    ADD_PROPERTY(AxialFree,(0));
    ADD_PROPERTY(Radius,(0.0));
    ADD_PROPERTY(Height,(0.0));
    ADD_PROPERTY_TYPE(BasePoint,(Base::Vector3d(0,0,0)),"ConstraintBearing",App::PropertyType(App::Prop_ReadOnly|App::Prop_Output),
                      "Base point of cylindrical bearing seat");
    ADD_PROPERTY_TYPE(Axis,(Base::Vector3d(0,1,0)),"ConstraintBearing",App::PropertyType(App::Prop_ReadOnly|App::Prop_Output),
                      "Axis of bearing seat");
}

App::DocumentObjectExecReturn *ConstraintBearing::execute(void)
{
    return Constraint::execute();
}

void ConstraintBearing::onChanged(const App::Property* prop)
{
    //Base::Console().Error("ConstraintBearing: onChanged %s\n", prop->getName());
    // Note: If we call this at the end, then the symbol ist not oriented correctly initially
    // because the NormalDirection has not been calculated yet
    Constraint::onChanged(prop);

    if (prop == &References) {
        // Find data of cylinder
        double radius, height;
        Base::Vector3d base, axis;
        if (!getCylinder(radius, height, base, axis))
            return;
        Radius.setValue(radius);
        Axis.setValue(axis);
        Height.setValue(height);
        // Update base point
        base = base + axis * height/2;
        if (Location.getValue() != NULL) {
            base = getBasePoint(base, axis, Location, Dist.getValue());
        }
        BasePoint.setValue(base);
        BasePoint.touch(); // This triggers ViewProvider::updateData()
    } else if ((prop == &Location) || (prop == &Dist)) {
        App::DocumentObject* obj = Location.getValue();
        std::vector<std::string> names = Location.getSubValues();
        if (names.size() == 0) {
            return;
        }
        std::string subName = names.front();
        Part::Feature* feat = static_cast<Part::Feature*>(obj);
        TopoDS_Shape sh = feat->Shape.getShape().getSubShape(subName.c_str());

        if (sh.ShapeType() == TopAbs_FACE) {
            BRepAdaptor_Surface surface(TopoDS::Face(sh));
            if (surface.GetType() != GeomAbs_Plane) {
                return; // "Location must be a planar face or linear edge"
            }
        } else if (sh.ShapeType() == TopAbs_EDGE) {
            BRepAdaptor_Curve line(TopoDS::Edge(sh));
            if (line.GetType() != GeomAbs_Line) {
                return; // "Location must be a planar face or linear edge"
            }
        }

        double radius, height;
        Base::Vector3d base, axis;
        if (!getCylinder(radius, height, base, axis))
            return;
        base = getBasePoint(base + axis * height/2, axis, Location, Dist.getValue());
        BasePoint.setValue(base);
        BasePoint.touch();
    }
}
