using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Autodesk.Revit.DB;
using Autodesk.Revit.DB.ExtensibleStorage;
using Autodesk.Revit.DB.Mechanical;
using Autodesk.Revit.DB.Plumbing;
using Autodesk.Revit.DB.Structure;
using KDCS.Utils;
using Autodesk.Revit.UI;


namespace KMBIM.Revit.Tools.Cmd.Hanger
{
    /// <summary>
    /// 설치 유형
    /// </summary>
    public enum EnumAnchorInstallBase
    {
        Structrual, // 구조물
        Level       // 레벨
    }

    class Hanger
    {
        	
        // 행거의 중심 고도를 넘겨준다.
        public static double GetCenterElevation(Autodesk.Revit.DB.Element elm)
        {
            var parm = elm.LookupParameter("CenterElevation");
		    return parm != null ? parm.AsDouble() : 0d;
	    }

        // 현재 행거의 앵커 고도가 주어진 값과 같지 않으면 주어진 값으로 수정한다.
        public static bool SetAnchorElevation(Autodesk.Revit.DB.Element elm, double anchorElevation)
        {
            var parameter = elm.LookupParameter("AnchorElevation");
            if (parameter != null)
            {
                var curElevation = parameter.AsDouble();
                if (!Util.IsEqual(curElevation, anchorElevation))
                {
                    return parameter.Set(anchorElevation);
                }
                return true;
            }
            return false;
        }


        // 주어진 색인에 해당하는 행거 패밀리 파일을 선택한 커브 객체에 배치합니다.
        internal static Result PlaceManual(int index, ExternalCommandData commandData, ref string errMsg)
        {
            try
            {
                Document document = commandData.Application.ActiveUIDocument.Document;
                if (index >= App.hanger_families.Count)
                {
                    return Result.Succeeded;
                }
                string hangerFamilyFile = App.hanger_families[index];


                //HangerFamily hangerFamily = new HangerFamily();
                //hangerFamily.SetView3dHanger(new View3DHanger(document));


                //HangerSettings settings = HangerSettings.GetSettings();
                Autodesk.Revit.UI.Selection.Selection selection = commandData.Application.ActiveUIDocument.Selection;
                while (true)
                {
                    Reference reference = null;
                    try
                    {
                        reference = selection.PickObject(Autodesk.Revit.UI.Selection.ObjectType.PointOnElement, new MEPCurveSelectionFilter(), "MEP 곡선의 ​​한 점을 선택하십시오!");
                        if (reference == null)
                        {
                            break;
                        }
                    }
                    catch (Exception ex)
                    {
                        errMsg = ex.Message;
                        break;
                    }
                    //MEPCurve a_2 = Util.a(document, reference.ElementId) as MEPCurve;
                    //if (!HangerSchema.HasCurve(a_2))
                    //{
                    //    return Result.Succeeded;
                    //}
                    /*
                    Autodesk.Revit.DB.Transaction transaction = new Autodesk.Revit.DB.Transaction(document, Resources.STRING_TADD_HANGER);
                    transaction.Start();

                    if (!n.r((Autodesk.Revit.DB.Element)a_2, settings))
                    {
                        return Result.Succeeded;
                    }
                    n.q(m.a(document, n.ac(), hangerFamilyFile));
                    if (n.ae() == null)
                    {
                        transaction.RollBack();
                        return Result.Failed;
                    }
                    if (!n.q(reference.GlobalPoint, settings.AttachTo))
                    {
                        transaction.RollBack();
                        return Result.Failed;
                    }
                    if (!HangerSchema.a(document, n, settings.AttachTo, ref errMsg))
                    {
                        transaction.RollBack();
                        return Result.Failed;
                    }
                    transaction.Commit();
                     * */
                }
                return Result.Succeeded;
            }
            catch (Exception ex2)
            {
                errMsg = ex2.Message;
                return Result.Failed;
            }
        }

        
        // 행거 부착 방식(유형)에 따라 레벨 또는 구조물에 부착합니다.
        internal static void Attach_XX(Document doc, Autodesk.Revit.DB.FamilyInstance fi)
        {
            // 행거 설정값 가져오기
            EnumAnchorInstallBase attachType = HangerSettings.GetSettings().AnchorInstallBase;

            // 행거
            Autodesk.Revit.DB.Level level = doc.GetElement(fi.LevelId) as Autodesk.Revit.DB.Level;
            if (level == null)
            {
                return;
            }


            // 행거 원점
            Autodesk.Revit.DB.XYZ origin = fi.GetTransform().Origin;
            View3DHanger view3dHanger = new View3DHanger(doc);
            HangerFamily n = new HangerFamily(null);
            n.SetFamilySymbol(fi.Symbol);
            // 행거 중심 높이
            var hangerCenterElevation = GetCenterElevation(fi);
            // 행거 삽입점
            Autodesk.Revit.DB.XYZ ptAttachment = new Autodesk.Revit.DB.XYZ(origin.X, origin.Y, hangerCenterElevation + level.ProjectElevation);
            double elevation = 0.0;
            if (attachType == EnumAnchorInstallBase.Structrual)
            {
                if (view3dHanger.GetIntersectionElevation(ptAttachment, n.IsSupport(), out elevation))
                {
                    SetAnchorElevation(fi, elevation - level.ProjectElevation);
                }
            }
            else if (view3dHanger.GetAnchorElevation(ptAttachment, n.IsSupport(), out elevation))
            {
                SetAnchorElevation(fi, elevation - level.ProjectElevation);
            }

        }

    }
}