using TopoDS;
using BRep;
using BRepBuilderAPI;
using Geom;
using gp;
using System;
using System.Collections.Generic;
using System.Text;
using TopExp;
using GC;
using BRepPrimAPI;
using TopAbs;
using TopTools;
using BRepOffsetAPI;


namespace OCCTest
{
    public class HollowedCylinder
    {

        public TopoDS_Compound compound;

        public bool test = false;
        public string monString;

        public HollowedCylinder(double myRadius, double myHeight, double myThickness) {
            // Profile : Define Support Points
            gp_Pnt aPnt1 = new gp_Pnt(-myRadius / 2f, 0f, 0f);
            gp_Pnt aPnt2 = new gp_Pnt(myRadius / 2f, 0f, 0f);
            gp_Pnt aPnt3 = new gp_Pnt(0f, -myRadius / 2f, 0f);


            // Profile : Define the Geometry
            GC_MakeArcOfCircle anArcOfCircle = new GC_MakeArcOfCircle(aPnt1, aPnt2, aPnt3); // trace a line between 1 and 2, but passing by 3



            // Profile : Define the Topology
            //TopoDS_Edge anEdge2 = BRepBuilderAPI_MakeEdge(anArcOfCircle);
            BRepBuilderAPI_MakeEdge aMakeEdge2 = new BRepBuilderAPI_MakeEdge(anArcOfCircle.Value());
            TopoDS_Edge anEdge2 = aMakeEdge2.Edge();
            //TopoDS_Wire aWire = BRepBuilderAPI_MakeWire(anEdge2);
            BRepBuilderAPI_MakeWire aMakeWire = new BRepBuilderAPI_MakeWire(anEdge2);
            TopoDS_Wire aWire = aMakeWire.Wire();
            
            
            // Complete Profile
            //gp_Ax1 xAxis = gp::OX(); // origine 0,0,0 avec dir 1,0,0 
            gp_Pnt aOrigin = new gp_Pnt(0f, 0f, 0f);
            gp_Dir dir= new gp_Dir(1f, 0f, 0f);
            gp_Ax1 axis= new gp_Ax1(aOrigin, dir);

            
            gp_Trsf aTrsf= new gp_Trsf();
            aTrsf.SetMirror(axis); 
            TopoDS_Wire aMirroredWire = aWire;
            BRepBuilderAPI_Transform aBRepTrsf= new BRepBuilderAPI_Transform(aMirroredWire, aTrsf, true); 
            //TopoDS_Shape aMirroredShape = aBRepTrsf.Shape();


            /**/
            //TopoDS_Wire aMirroredWire = TopoDS.TopoDS_Wire.wire(aMirroredShape);
            
            BRepBuilderAPI_MakeWire mkWire= new BRepBuilderAPI_MakeWire();
            mkWire.Add(aWire);
            mkWire.Add(aMirroredWire);
            TopoDS_Wire myWireProfile = mkWire.Wire();

            /**/

            // Body : Prism the Profile 
            //TopoDS_Face myFaceProfile = BRepBuilderAPI_MakeFace(myWireProfile);
            BRepBuilderAPI_MakeFace myMakeFaceProfile = new BRepBuilderAPI_MakeFace(myWireProfile);
            TopoDS_Face myFaceProfile = myMakeFaceProfile.Face();

            gp_Vec aPrismVec=new gp_Vec(0, 0, myHeight);

            //TopoDS_Shape myBody = BRepPrimAPI_MakePrism(myFaceProfile, aPrismVec);
            BRepPrimAPI_MakePrism myMakeBody = new BRepPrimAPI_MakePrism(myFaceProfile, aPrismVec);
            TopoDS_Shape myBody = myMakeBody.Shape();

            /**/
            // Body : Create a Hollowed Solid
            TopoDS_Face faceTopToRemove= new TopoDS_Face();
            TopoDS_Face faceBotToRemove = new TopoDS_Face();
            double zMax = -1;
            double zMin = 1;
            for (TopExp_Explorer aFaceExplorer=new TopExp_Explorer(myBody, TopAbs_ShapeEnum.TopAbs_FACE); aFaceExplorer.More(); aFaceExplorer.Next())
            {  
                //TopoDS_Face aFace = TopoDS::Face(aFaceExplorer.Current());
                TopoDS_Face aFace = new TopoDS_Face();
                //aFace = (TopoDS_Face)aFaceExplorer.Current();
                aFace = TopoDS.TopoDS.ToFace(aFaceExplorer.Current());

                
                // Check if <aFace> is the top face of the bottle's neck 
                //Handle(Geom_Surface) aSurface = BRep_Tool::Surface(aFace);
                Geom_Surface aSurface = BRep_Tool.Surface(aFace);
                
                //if (aSurface->DynamicType() == STANDARD_TYPE(Geom_Plane))
                if (aSurface.GetType().ToString() == Geom_Plane.get_type_name()) //Standard.Standard_Type
                {
                    //Handle(Geom_Plane) aPlane = Handle(Geom_Plane)::DownCast(aSurface);
                    Geom_Plane aPlane = Geom_Plane.DownCast(aSurface);

                    gp_Pnt aPnt = aPlane.Location();
                    double aZ = aPnt.Z();
                    if (aZ > zMax)
                    {
                        zMax = aZ;
                        faceTopToRemove = aFace;
                    }

                    if (aZ < zMin)
                    {
                        zMin = aZ;
                        faceBotToRemove = aFace;
                    }
                }
            }

            
            TopTools_ListOfShape facesToRemove= new TopTools_ListOfShape();
            facesToRemove.Append(faceTopToRemove);
            facesToRemove.Append(faceBotToRemove);
            
            try
            {
                //myBody = BRepOffsetAPI_MakeThickSolid(myBody, facesToRemove, -myThickness, 0.001); // à quoi correspond le 1.e-3 ?
                BRepOffsetAPI_MakeThickSolid myMakeThickBody = new BRepOffsetAPI_MakeThickSolid(myBody, facesToRemove, -myThickness, 0.001);
                /*BRepOffsetAPI_MakeThickSolid myMakeThickBody = new BRepOffsetAPI_MakeThickSolid(); 
                myMakeThickBody.MakeThickSolidByJoin(myBody, facesToRemove, -myThickness, 0.001);
                /*myBody = myMakeThickBody.Shape();//*/
            }
            catch (Exception e) {
                Console.WriteLine(e);
                monString = e.ToString();
            }
            

            /*
            // Building the Resulting Compound 
            TopoDS_Compound aRes= new TopoDS_Compound();
            BRep_Builder aBuilder= new BRep_Builder();
            aBuilder.MakeCompound(ref aRes);
            TopoDS_Shape myRefOut = new TopoDS_Shape();
            myRefOut = aRes.EmptyCopied();
            aBuilder.Add(ref myRefOut, myBody);
            //return aRes;
            this.compound = aRes;//*/
            test = true;
        }
    }
}