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 Autodesk.Revit.DB.Plumbing;
using KDCS.Utils;
using Autodesk.Revit.DB.Structure;
using KMBIM.Revit.Tools.Cmd.SprinklerConnect;
using KMBIM.Revit.Tools;
using View = Autodesk.Revit.DB.View;
using Autodesk.Revit.DB.Mechanical;
using Autodesk.Revit.DB.Electrical;

namespace KMBIM
{
    [Autodesk.Revit.Attributes.Transaction(Autodesk.Revit.Attributes.TransactionMode.Manual)]
    public class Stretch : 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;

            try
            { 
                //if (!WorkMain.GetInstance().IsValid) return Autodesk.Rev   it.UI.Result.Succeeded;
                //PickedBox pickedBox = commandData.Application.ActiveUIDocument.Selection.PickBox(PickBoxStyle.Crossing);
                IList<Reference> pickRefs = commandData.Application.ActiveUIDocument.Selection.PickObjects(ObjectType.Element, new SelectPipeDuct(), "신축할 설비요소 선택 :");
                
                List<Element> ElemLst = new List<Element>();
                
                foreach(Reference refer in pickRefs)
                {
                    ElemLst.Add(doc.GetElement(refer));                    
                }

                XYZ Dirpt;
                using (Transaction t = new Transaction(doc))
                {
                    t.Start("Test Transaction");
                    SketchPlane sp = SketchPlane.Create(doc, Plane.CreateByNormalAndOrigin(
                        doc.ActiveView.ViewDirection,
                        doc.ActiveView.Origin));

                    doc.ActiveView.SketchPlane = sp;

                    // Finally, we are able to PickPoint()
                    Dirpt = uidoc.Selection.PickPoint();

                    // Don't forget to clean up
                    doc.Delete(sp.Id);

                    t.Commit();
                }

                //XYZ Dirpt = commandData.Application.ActiveUIDocument.Selection.PickPoint("기준점 지정 : ");                
                //XYZ Tranpt = commandData.Application.ActiveUIDocument.Selection.PickPoint("변경할 위치 점 지정 : ");
                //스트레치 길이                
                //double m_StretchDist = Dirpt.DistanceTo(Tranpt);

                //
                XYZ firstSp = null, firstEp = null;
                foreach(Element elem in ElemLst)
                {
                    if (elem is Pipe)
                    {
                        Pipe FirstPipe = ElemLst.First() as Pipe;
                        Util.GetStartEndPoint(FirstPipe, ref firstSp, ref firstEp);
                        break;
                    }
                    else if (elem is Duct)
                    {
                        Duct FirstDuct = ElemLst.First() as Duct;
                        Util.GetStartEndPoint(FirstDuct, ref firstSp, ref firstEp);
                        break;
                    }
                    else if (elem is FlexPipe)
                    {
                        FlexPipe FirstFlexPipe = ElemLst.First() as FlexPipe;
                        Util.GetStartEndPoint(FirstFlexPipe, ref firstSp, ref firstEp);
                        break;
                    }
                    else if (elem is FlexDuct)
                    {
                        FlexDuct FirstFlexDuct = ElemLst.First() as FlexDuct;
                        Util.GetStartEndPoint(FirstFlexDuct, ref firstSp, ref firstEp);
                        break;
                    }
                    else if (elem is CableTray)
                    {
                        CableTray FirstTray = ElemLst.First() as CableTray;
                        Util.GetStartEndPoint(FirstTray, ref firstSp, ref firstEp);
                        break;
                    }
                    else if (elem is Conduit) 
                    {
                        Conduit FirstConduit = ElemLst.First() as Conduit;
                        Util.GetStartEndPoint(FirstConduit, ref firstSp, ref firstEp);
                        break;
                    }
                }
                

                XYZ RotVec1 = Util.RotateVector(firstSp, firstEp, Unit.MMToFeet(90));
                XYZ RotVec2 = Util.RotateVector(firstSp, firstEp, Unit.MMToFeet(-90));

                XYZ DirLinePt1 = Util.Polar(Dirpt, RotVec1, 100);
                XYZ DirLinePt2 = Util.Polar(Dirpt, RotVec2, 100);

                //연결되지 않은 커넥터 리스트 구하기
                List<Connector> m_CloseConLst = new List<Connector>();
                foreach(Element elem in ElemLst)
                {
                    Connector closeCon = ClosestConnect(Dirpt, elem);
                    if (closeCon.IsConnected == true) continue;
                    m_CloseConLst.Add(closeCon);
                }

                using(Transaction trans = new Transaction(doc))
                {
                    trans.Start("1");

                    foreach (Connector con in m_CloseConLst) 
                    {
                        Connector otherCon = Util.GetOtherConnector(con);

                        //기준 파이프로 가상선 생성
                        XYZ VirtualSpt = Util.Polar(con.Origin, (con.Origin - otherCon.Origin).Normalize(), 100);
                        XYZ VirtualEpt = Util.Polar(con.Origin, (otherCon.Origin - con.Origin).Normalize(), 100);
                        Line VirtualLine = Line.CreateBound(VirtualSpt, VirtualEpt);
                        //기준 점 파이프 가상선 교차점 찾기
                        IntersectionResult interRes = VirtualLine.Project(Dirpt);
                        XYZ ElemDirPt = interRes.XYZPoint;

                        //Util.Pyosi(doc, ElemDirPt, 0);o

                        con.Origin = ElemDirPt;

                        //MessageBox.Show("1");
                    }

                    trans.Commit();
                }

            }
            catch (Exception)
            {
            }


            return Result.Succeeded;
        }

        //기준점으로부터 가까운 커넥터 구하기.
        public Connector ClosestConnect(XYZ Dirpt,Element elem)
        {
            List<Connector> ConLst = Util.GetElementConnectors(elem);            
            double dist = double.MaxValue;
            Connector CloseCon = null;
            foreach (Connector con in ConLst)
            {
                XYZ conZ0 = new XYZ(con.Origin.X, con.Origin.Y, 0);
                
                if (Dirpt.DistanceTo(conZ0) <= dist)
                {
                    CloseCon = con;
                    dist = Dirpt.DistanceTo(conZ0);
                }
                    
            }
            
            return CloseCon;
        }
    }
    
    public class SelectPipeDuct : 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
                || element.Category.Id.IntegerValue == (int)BuiltInCategory.OST_CableTray
                || element.Category.Id.IntegerValue == (int)BuiltInCategory.OST_Conduit
                || element.Category.Id.IntegerValue == (int)BuiltInCategory.OST_FlexPipeCurves
                || element.Category.Id.IntegerValue == (int)BuiltInCategory.OST_FlexDuctCurves)
            {
                return true;
            }
            return false;
        }
        public bool AllowReference(Reference refer, XYZ point)
        {
            return false;
        }
    }
}