using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

using GrxCAD.ApplicationServices;
using GrxCAD.DatabaseServices;
using GrxCAD.EditorInput;
using GrxCAD.Geometry;
using System.Windows.Forms;
using System.IO;

namespace HCTools
{
    class PickupPoint
    {
        public void PickupPt(string num)
        {
            Document document = GrxCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument;
            Database db = HostApplicationServices.WorkingDatabase;

            Editor ed = GrxCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument.Editor;

            TypedValue[] value = new TypedValue[]
            {
                new TypedValue((int)DxfCode.Start,"LWPOLYLINE,POLYLINE")
            };//设置筛选条件
            SelectionFilter filter = new SelectionFilter(value);

            //选择区域中全部对象
            //PromptSelectionResult psr = ed.SelectAll(filter);
            // 要求在图形区域中手动选择对象
            PromptSelectionResult psr = ed.GetSelection(filter);
            SelectionSet selectionset = psr.Value;

            if (psr.Status == PromptStatus.OK)
            {
                ObjectId[] obj = new ObjectId[selectionset.Count];
                obj = selectionset.GetObjectIds();
                List<Point3d> AllPoints = new List<Point3d>();
                List<string> FinalPoints = new List<string>();
                string decimalnum = "F" + num;
                string ele = " ";

                for (int i = 0; i < obj.Length; i++)
                {
                    DocumentLock documentlock = GrxCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument.LockDocument();
                    using (Transaction trans = db.TransactionManager.StartTransaction())
                    {
                        Point3dCollection coll = new Point3dCollection();
                        ObjectId objid = obj[i];
                        Entity entity = (Entity)trans.GetObject(objid, OpenMode.ForWrite);

                        if (entity is Polyline)
                        {
                            Polyline line = entity as Polyline;
                            //line.GetStretchPoints(coll);
                            int vertexNum = line.NumberOfVertices;
                            Point3d point;
                            // 遍历获取多段线顶点坐标
                            for (int ii = 0; ii < vertexNum; ii++)
                            {
                                point = line.GetPoint3dAt(ii);
                                coll.Add(point);
                            }
                            ele = line.Elevation.ToString();
                        }
                        else if (entity is Polyline2d)
                        {
                            Polyline2d line = entity as Polyline2d;
                            //line.GetStretchPoints(coll);
                            foreach (ObjectId id in line)
                            {
                                Vertex2d vx = (Vertex2d)trans.GetObject(id, OpenMode.ForRead);
                                if (vx.VertexType != Vertex2dType.SplineControlVertex)
                                {
                                    coll.Add(vx.Position);
                                }
                            }
                            ele = line.Elevation.ToString();
                        }
                        else if(entity is Polyline3d)
                        {
                            Polyline3d line = entity as Polyline3d;
                            foreach (ObjectId id in line)
                            {
                                PolylineVertex3d vx3d = (PolylineVertex3d)trans.GetObject(id,
                                    OpenMode.ForRead);
                                coll.Add(vx3d.Position);
                            }
                            ele = "三维多段线";
                        }

                        #region//无用
                        ////检查选择的多段线是否有重复点，如果有就移除
                        //for (int ii = 0; ii < coll.Count - 1; ii++)
                        //{
                        //    for (int iii = ii + 1; iii < ii + 21; iii++)
                        //    {
                        //        if (iii == coll.Count + 1)
                        //            break;

                        //        string x1 = coll[ii].X.ToString(decimalnum);
                        //        string y1 = coll[ii].Y.ToString(decimalnum);

                        //        string x2 = coll[iii].X.ToString(decimalnum);
                        //        string y2 = coll[iii].Y.ToString(decimalnum);

                        //        if (x1 == x2 && y1 == y2)
                        //        {
                        //            coll.RemoveAt(iii);
                        //        }
                        //        else
                        //        {
                        //            continue;
                        //        }
                        //    }
                        //}
                        #endregion

                        for (int j = 0; j < coll.Count; j++)
                        {
                            AllPoints.Add(coll[j]);
                        }
                        trans.Commit();
                    }
                    documentlock.Dispose();

                    for (int ii = 0; ii < AllPoints.Count; ii++)
                    {
                        if (ii == 0)
                            FinalPoints.Add(ele);
                        string x = AllPoints[ii].X.ToString(decimalnum);
                        string y = AllPoints[ii].Y.ToString(decimalnum);
                        string z = AllPoints[ii].Z.ToString(decimalnum);
                        string res = string.Join(" ", new string[] { x, y, z });
                        FinalPoints.Add(res);
                    }
                    AllPoints.Clear();
                }
                //保存文件对话框
                System.Windows.Forms.SaveFileDialog save = new System.Windows.Forms.SaveFileDialog();
                save.Filter = "文本文件(*.txt)|*.txt";
                //FolderBrowserDialog dialog = new FolderBrowserDialog();
                //dialog.Description = "请选择文件路径";
                //保存文件是否记录上一次文件目录
                save.RestoreDirectory = true;
                if (save.ShowDialog() == DialogResult.OK)
                {
                    string savePath = save.FileName;
                    File.WriteAllLines(savePath, FinalPoints, Encoding.UTF8);
                    ed.WriteMessage("保存成功\n");
                }
                else
                {
                    MessageBox.Show("保存失败\n");
                }
                //if (dialog.ShowDialog() == DialogResult.OK)
                //{
                //    string foldPath = dialog.SelectedPath;
                //    string savePath = foldPath + "\\" + ele + ".txt";
                //    File.WriteAllLines(savePath, FinalPoints, Encoding.UTF8);
                //    ed.WriteMessage("\n保存成功");
                //}
            }
            else
            {
                ed.WriteMessage("\n多段线选择失败");
            }
            
        }
    }
}