using Autodesk.Revit.DB;
using Autodesk.Revit.UI;

using System;
using System.Collections.Generic;
using System.Drawing;
using System.Runtime.CompilerServices;
using System.Windows.Forms;

namespace HYJig
{
    public class XArcJig : XUiJigBase
    {
        public XArcJig(UIDocument uiDoc)
    : base(uiDoc)
        {
            this.JigStage = XArcJig.EStage.eNoOper;
        }

        public XYZ PickCenterPoint(string strPrompt = "请确定圆弧中心点：")
        {
            try
            {
                this.JigStage = XArcJig.EStage.ePtCenter;
                this.CenterPoint = base.UiDoc.Selection.PickPoint(strPrompt);
            }
            catch
            {
                this.CenterPoint = null;
            }
            this.JigStage = XArcJig.EStage.eNoOper;
            return this.CenterPoint;
        }

        public XYZ PickStartPoint(XYZ ptCenter, string strPrompt = "请确定圆弧起点：")
        {
            try
            {
                this.JigStage = XArcJig.EStage.ePtStart;
                this.CenterPoint = ptCenter;
                this.StartPoint = base.UiDoc.Selection.PickPoint(strPrompt);
            }
            catch
            {
                this.StartPoint = null;
            }
            this.JigStage = XArcJig.EStage.eNoOper;
            return this.StartPoint;
        }

        public XYZ PickEndPoint(XYZ ptCenter, XYZ ptStart, string strPrompt = "请确定圆弧终点：")
        {
            try
            {
                this.JigStage = XArcJig.EStage.ePtEnd;
                this.CenterPoint = ptCenter;
                this.StartPoint = ptStart;
                this.EndPoint = base.UiDoc.Selection.PickPoint(strPrompt);
                this.EndPoint = this.method_13(this.EndPoint);
            }
            catch
            {
                this.EndPoint = null;
            }
            this.JigStage = XArcJig.EStage.eNoOper;
            return this.EndPoint;
        }

        public override void Draw(PaintEventArgs paintEventArgs)
        {
            base.Draw(paintEventArgs);
            if (this.JigStage == XArcJig.EStage.ePtStart)
            {
                Graphics graphics = paintEventArgs.Graphics;
                Point point = base.Revit2Client(this.CenterPoint);
                int distance = XDrawable2D.GetDistance(point, this.m_ptCur);
                XCircle2D xcircle2D = new XCircle2D(point, distance);
                XGraphics xgraphics = new XGraphics(graphics, base.JigPen);
                xcircle2D.Draw(xgraphics);
            }
            else if (this.JigStage == XArcJig.EStage.ePtEnd)
            {
                try
                {
                    XYZ xyz = base.Client2Revit(this.m_ptCur);
                    xyz = this.method_13(xyz);
                    XYZ xyz2 = this.StartPoint + 0.5 * (xyz - this.StartPoint);
                    XYZ xyz3 = this.method_13(xyz2);
                    XArc2D xarc2D = new XArc2D(base.Revit2Client(this.StartPoint), base.Revit2Client(xyz), base.Revit2Client(xyz3));
                    XGraphics xgraphics2 = new XGraphics(paintEventArgs.Graphics, base.JigPen);
                    xarc2D.Draw(xgraphics2);
                }
                catch
                {
                }
            }
        }

        public override List<Curve> CreateCurves()
        {
            List<Curve> list = new List<Curve>();
            try
            {
                if (this.CenterPoint != null && this.StartPoint != null && this.EndPoint != null)
                {
                    XYZ xyz = this.StartPoint + 0.5 * (this.EndPoint - this.StartPoint);
                    XYZ xyz2 = this.method_13(xyz);
                    Arc arc = Arc.Create(this.StartPoint, this.EndPoint, xyz2);
                    list.Add(arc);
                }
            }
            catch
            {
            }
            return list;
        }

        private XYZ method_13(XYZ xyz_3)
        {
            double num = this.CenterPoint.DistanceTo(this.StartPoint);
            Plane plane = Plane.CreateByNormalAndOrigin(base.UiDoc.ActiveView.ViewDirection, this.CenterPoint);
            Arc arc = Arc.Create(plane, num, 0.0, Math.PI);
            arc.MakeUnbound();
            return arc.Project(xyz_3).XYZPoint;
        }

        public XYZ CenterPoint { get; set; }

        public XYZ StartPoint { get; set; }

        public XYZ EndPoint { get; set; }

        public XArcJig.EStage JigStage { get; set; }

        public enum EStage
        {
            eNoOper,
            ePtCenter,
            ePtStart,
            ePtEnd
        }
    }
}