using System;
using Autodesk.Revit.UI;
using Autodesk.Revit.DB;
using System.Collections.Generic;
using System.Windows.Forms;
using System.Linq;
using Autodesk.Revit.UI.Selection;
using KDCS.Utils;
using Autodesk.Revit.DB.Structure;
using KMBIM.Revit.Tools.Cmd.SprinklerConnect;
using Autodesk.Revit.DB.Mechanical;
using KMBIM.Revit.Tools;
using Autodesk.Revit.DB.Plumbing;

namespace KMBIM
{
    [Autodesk.Revit.Attributes.Transaction(Autodesk.Revit.Attributes.TransactionMode.Manual)]
    public class ElementTrim : IExternalCommand
    {
        UIApplication uiapp;
        UIDocument uidoc;
        Autodesk.Revit.DB.Document doc;
        Autodesk.Revit.Creation.Application creApp;
        Autodesk.Revit.Creation.Document creDoc;
        Autodesk.Revit.UI.ExternalCommandData m_commandData;

        public Autodesk.Revit.UI.Result Execute(ExternalCommandData commandData, ref string message, ElementSet elements)
        {
            m_commandData = commandData;
            uiapp = commandData.Application;
            uidoc = uiapp.ActiveUIDocument;
            doc = uidoc.Document;
            creApp = uiapp.Application.Create;
            creDoc = doc.Create;

            List<Element> m_ElemLst = new List<Element>();

            try
            {
                if (!WorkMain.GetInstance().IsValid) return Autodesk.Revit.UI.Result.Succeeded;
                while (true)
                {
                    Reference pickRef = commandData.Application.ActiveUIDocument.Selection.PickObject(Autodesk.Revit.UI.Selection.ObjectType.Element, new SelectionFilter(), "절단할 배관 또는 덕트 선택 : ");
                    XYZ Gpt = pickRef.GlobalPoint;

                    Element pickElem = doc.GetElement(pickRef);

                    using(Transaction trans = new Transaction(doc))
                    {
                        trans.Start("cutting");

                        XYZ sp = null, ep = null;
                        Line ElemLine = null;

                        if(pickElem is Pipe)
                        {
                            Util.GetStartEndPoint(pickElem as Pipe, ref sp, ref ep);
                            ElemLine = ((pickElem as Pipe).Location as LocationCurve).Curve as Line;
                            //선택점과 파이프 교차점 찾기.
                            IntersectionResult interRes = ElemLine.Project(Gpt);
                            XYZ DivPt = interRes.XYZPoint;

                            List<ElementId> ElemIdLst = new List<ElementId>();
                            ElemIdLst = Util.DivideElement(doc, pickElem as Pipe, DivPt);

                        }
                        else if(pickElem is Duct)
                        {
                            Util.GetStartEndPoint(pickElem as Duct, ref sp, ref ep);
                            ElemLine = ((pickElem as Duct).Location as LocationCurve).Curve as Line;

                            //선택점과 덕트 교차점 찾기.
                            IntersectionResult interRes = ElemLine.Project(Gpt);
                            XYZ DivPt = interRes.XYZPoint;

                            List<ElementId> ElemIdLst = new List<ElementId>();
                            ElemIdLst = Util.DivideElement(doc, pickElem as Duct, DivPt);

                        }
                        


                        trans.Commit();
                    }


                }//while end


            }
            catch (Exception e)
            {
                //MessageBox.Show("" + e);
            }



            return Result.Succeeded;
        }
        public class SelectionFilter : ISelectionFilter
        {
            public bool AllowElement(Element element)
            {
                if (element.Category == null) return false;
                if (element.Category.Id.IntegerValue == (int)BuiltInCategory.OST_PipeCurves
                    || element.Category.Id.IntegerValue == (int)BuiltInCategory.OST_DuctCurves)
                {
                    return true;
                }
                return false;
            }
            public bool AllowReference(Reference refer, XYZ point)
            {
                return false;
            }
        }
    }
}