using System;
using System.Collections.Generic;
using System.Text;
using Grasshopper.Kernel;
using Rhino.Geometry;


namespace Reinforcement_Toolbox
{
    public class MeshTopologyComponent : GH_Component
    {
        //Add constructor
        public MeshTopologyComponent()
            
            //Call the base constructor
            : base("MeshTopology", "MeshTop","Creates the mesh topology of a triangle mesh.","Reinforcement Toolbox","Geometry")
        { }

        protected override void RegisterInputParams(GH_Component.GH_InputParamManager pManager)
        {
            pManager.Register_BRepParam("Triangles", "Tr", "Collection of triangular Breps.",GH_ParamAccess.list);

            //pManager.Register_IntegerParam("Vertice Index", "VI", "Index of vertice.");

            //Optional input
            pManager[0].Optional = true;
            //pManager[1].Optional = true;
        }

        protected override void RegisterOutputParams(GH_Component.GH_OutputParamManager pManager)
        {
            //output parameter 0
            pManager.Register_PointParam("Centroids", "C", "Centroids of the faces.");

            //output parameter 1
            IGH_Param meshTopology = new Param_MeshTopology();
            pManager.RegisterParam(meshTopology, "MeshTopology", "MP", "Holds the topological information of a mesh.");
        }

        protected override void SolveInstance(IGH_DataAccess DA)
        {
            //create a list with Breps
            List<Brep> brepList = new List<Brep>();
            
            //create a MeshTopology
            RTMeshTopology meshTopology = new RTMeshTopology();

            //fill the list with the assigned Breps
            if (!DA.GetDataList(0, brepList)) { return; }
            //if (!DA.GetData(1, ref index)) { return; }

            //create a Face for each Brep in the list and add the Face to the MeshTopology
            foreach (Brep brep in brepList)
            {
                Face face = new Face(brep);
                meshTopology.AddFace(face);
            }

            //unify the orientation of all Faces contained in the MeshTopology
            meshTopology.UnifyOrientation();

            //create the Face normals
            meshTopology.SetFaceNormals();

            //create the Vertice vectors
            meshTopology.SetVerticeVectors();


            //DEBUG
            //create a list with offset vertices
            List<Point3d> verticePointList = new List<Point3d>();

            foreach (Vertice vertice in meshTopology.Vertices)
            {
                Point3d verticePoint = new Point3d((vertice.X + (10 * vertice.VerticeVector.X)), (vertice.Y + (10 * vertice.VerticeVector.Y)), (vertice.Z + (10 * vertice.VerticeVector.Z)));

                verticePointList.Add(verticePoint);
            }

            DA.SetDataList(0, verticePointList);
            //DEBUG

            //REVISE: set the output to the MeshTopology
            //int verticeCount = meshTopology.Vertices.Count;
        }

        public override Guid ComponentGuid
        {
            get
            {
                return new Guid("{CF25B715-C72B-4010-8441-4882AA805E1E}");
            }
        }
    }
}