using System;
using System.Collections.Generic;
using System.IO;
using System.Threading;

namespace BaseLibRWFile
{
    public class Dxf
    {
        public struct DataLineStruct    //线状结构
        {
            //public int iLineType;
            public float fX1Pos;
            public float fY1Pos;
            public float fZ1Pos;
            public float fX2Pos;
            public float fY2Pos;
            public float fZ2Pos;
        };
        public struct DataPolyLineStruct  //聚合结构
        {
            //public int iLineType;
            public int iNum;
            public float fX1Pos;
            public float fY1Pos;
            public float fX2Pos;
            public float fY2Pos;

        };
        public struct DataArcStruct     //圆弧或拱形结构
        {
            public float fXPos;
            public float fYPos;
            public float fX1Pos;
            public float fY1Pos;
            public float fRPos;
            public float fptXPos;
            public float fptYPos;
            public float fAngle1Pos;
            public float fAngle2Pos;
            public float fIPos;
            public float fJPos;
        };
        public struct DataCircleStruct   //圆形结构
        {
            public float fXPos;
            public float fYPos;
            public float fZPos;
            public float fRPos;
        };
        public struct DataTypeStruct    //字体结构
        {
            //public int iCutNum;
            //public bool xIsMoveDown;
            //public int iLineType;
            //public float fXPos;
            //public float fYPos;
            //public float fIPos;
            //public float fJPos;
        };

        static List<DataPolyLineStruct> stuPolyLineArray = new List<DataPolyLineStruct>(); //聚合结构集合
        //static List<DataTypeStruct> stuDataArray = new List<DataTypeStruct>();             //字体结构集合
        static List<DataLineStruct> stuLineArray = new List<DataLineStruct>();             //线状结构集合
        static List<DataArcStruct> stuArcArray = new List<DataArcStruct>();                //圆弧或拱形结构集合
        static List<DataCircleStruct> stuCircleArray = new List<DataCircleStruct>();       //圆形结构集合


        private static FileInfo theSourceFile;
        private static double XMax, XMin;
        private static double YMax, YMin;
        private static double ZMax, ZMin;
        //static int xStrat, xEnd, yStart, yEnd;
        static bool xIsRead = false;
        //public static int Pointnum;
        public static string[][] ReadDXF(string filePath, string filename, out int Pointnum)
        {
            string[][] Allpoint = new string[1000][];
            //xStrat = xEnd = yStart = yEnd = 0;
            for (int i = 0; i < 1000; i++)
            {
                Allpoint[i] = new string[10];
                for (int j = 0; j < 10; j++)
                {
                    Allpoint[i][j] = null;
                }
            }
            string line1, line2;                            //这些line1和line2用于获取a/m数据
            List<string> table1 = new List<string>();
            List<string> table2 = new List<string>();
            line1 = "0";                                    //初始化line1 and line2 
            line2 = "0";
            Pointnum = 0;

            filename = filePath + "\\" + filename; //treeView1.SelectedNode.Text;//e.Node.Text;
            stuLineArray.Clear();
            stuCircleArray.Clear();
            stuArcArray.Clear();
            stuPolyLineArray.Clear();
            theSourceFile = new FileInfo(filename);     //设定读取文件位置
            StreamReader reader;                        //StreamReader reader = new StreamReader(filename, Encoding.Default);
            reader = theSourceFile.OpenText();          //读取DXF文件
                                                        //该部分对DXF文件中的绘图对象进行解析，判断线段类型
            do
            {
                table1.Add(line1);
                table2.Add(line2);
                if (line1 == "2" && line2 == "ENTITIES")
                {
                    xIsRead = true;
                }
                if (line2 == "ENDSEC")
                {
                    xIsRead = false;
                }
                if (xIsRead)
                {
                    if (line1 == "0" && line2 == "LINE")
                    {
                        float x1 = 0, y1 = 0, x2 = 0, y2 = 0;
                        LineModule(reader, ref x1, ref y1, ref x2, ref y2);
                        Allpoint[Pointnum][0] = (Pointnum + 1).ToString();
                        Allpoint[Pointnum][1] = "LINE";
                        Allpoint[Pointnum][2] = x1.ToString();
                        Allpoint[Pointnum][3] = y1.ToString();
                        Allpoint[Pointnum][4] = x2.ToString();
                        Allpoint[Pointnum][5] = y2.ToString();
                        Pointnum++;
                    }
                    //else if (line1 == "0" && line2 == "LWPOLYLINE");
                    //PolylineModule(reader);

                    else if (line1 == "0" && line2 == "CIRCLE")
                    {
                        float x1 = 0, y1 = 0, radius = 0;
                        CircleModule(reader, ref x1, ref y1, ref radius);
                        Allpoint[Pointnum][0] = (Pointnum + 1).ToString();
                        Allpoint[Pointnum][1] = "CIRCLE";
                        Allpoint[Pointnum][2] = x1.ToString();
                        Allpoint[Pointnum][3] = y1.ToString();
                        Allpoint[Pointnum][4] = radius.ToString();
                        Pointnum++;
                    }
                    else if (line1 == "0" && line2 == "ARC")
                    {
                        float x1 = 0, y1 = 0, x2 = 0, y2 = 0, radius = 0;
                        ArcModule(reader, ref x1, ref y1, ref x2, ref y2, ref radius);
                        Allpoint[Pointnum][0] = (Pointnum + 1).ToString();
                        Allpoint[Pointnum][1] = "ARC";
                        Allpoint[Pointnum][4] = x1.ToString();
                        Allpoint[Pointnum][5] = y1.ToString();
                        Allpoint[Pointnum][2] = x2.ToString();
                        Allpoint[Pointnum][3] = y2.ToString();
                        Allpoint[Pointnum][6] = radius.ToString();
                        Pointnum++;
                    }
                    else if (line1 == "0" && line2 == "POLYLINE")
                        PolylineModule(reader);

                    //else if (line1 == "0" && line2 == "TEXT")
                    //   ;

                }
                GetLineCouple(reader, out line1, out line2);        // 区分线段类型，将值赋给line1和line2
            }
            while (line2 != "EOF");

            reader.DiscardBufferedData();                           //清除读取状态.
            theSourceFile = null;
            reader.Close();
            return Allpoint;
            //PaintBack();
            //Compare();
            //Creat();
        }
        private static void GetLineCouple(StreamReader theReader, out string line1, out string line2)       //区分线段类型，将值赋给line1和line2
        {
            System.Globalization.CultureInfo ci = Thread.CurrentThread.CurrentCulture;//
            string decimalSeparator = ci.NumberFormat.CurrencyDecimalSeparator;

            line1 = line2 = "";

            if (theReader == null)
                return;

            line1 = theReader.ReadLine();
            if (line1 != null)
            {
                line1 = line1.Trim();
                line1 = line1.Replace('.', decimalSeparator[0]);

            }
            line2 = theReader.ReadLine();
            if (line2 != null)
            {
                line2 = line2.Trim();
                line2 = line2.Replace('.', decimalSeparator[0]);
            }
        }
        private static void LineModule(StreamReader reader, ref float x1, ref float y1, ref float x2, ref float y2)     //解析DXF文件中的线段
        {
            string line1, line2;
            line1 = "0";
            line2 = "0";

            x1 = 0;
            y1 = 0;
            float z1 = 0;
            x2 = 0;
            y2 = 0;
            float z2 = 0;

            DataLineStruct stu1 = new DataLineStruct();
            do
            {
                GetLineCouple(reader, out line1, out line2);

                if (line1 == "10")
                {
                    x1 = (float)Convert.ToDouble(line2);

                    if (x1 > XMax)
                        XMax = x1;

                    if (x1 < XMin)
                        XMin = x1;
                }
                if (line1 == "20")
                {
                    y1 = (float)Convert.ToDouble(line2);
                    if (y1 > YMax)
                        YMax = y1;

                    if (y1 < YMin)
                        YMin = y1;
                }
                if (line1 == "30")
                {
                    z1 = (float)Convert.ToDouble(line2);
                    if (z1 > ZMax)
                        ZMax = y1;

                    if (z1 < ZMin)
                        ZMin = y1;
                }
                if (line1 == "11")
                {
                    x2 = (float)Convert.ToDouble(line2);
                    if (x2 > XMax)
                        XMax = x2;

                    if (x2 < XMin)
                        XMin = x2;
                }
                if (line1 == "21")
                {
                    y2 = (float)Convert.ToDouble(line2);
                    if (y2 > YMax)
                        YMax = y2;

                    if (y2 < YMin)
                        YMin = y2;
                }
                if (line1 == "31")
                {
                    z2 = (float)Convert.ToDouble(line2);
                    if (z2 > ZMax)
                        ZMax = y1;

                    if (z2 < ZMin)
                        ZMin = y1;
                }
            }
            while (line1 != "31");

            stu1.fX1Pos = x1;
            stu1.fX2Pos = x2;
            stu1.fZ1Pos = z1;
            stu1.fZ2Pos = z2;
            stu1.fY1Pos = y1;
            stu1.fY2Pos = y2;
            //DXFLibrary.Line line3 = new DXFLibrary.Line("Doors", 0, 0, 0, 10);
            //DXFLibrary.Text text = new DXFLibrary.Text("L" + stuLineArray.Count.ToString(), x1, y1, 40, "PartialHeightDoors");
            stuLineArray.Add(stu1);
        }
        private static void CircleModule(StreamReader reader, ref float x1, ref float y1, ref float radius)     //解析DXF文件中的圆
        {
            string line1, line2;
            line1 = "0";
            line2 = "0";
            x1 = 0;
            y1 = 0;
            float z1 = 0;
            radius = 0;
            DataCircleStruct stu1;
            do
            {
                GetLineCouple(reader, out line1, out line2);

                if (line1 == "10")
                {
                    x1 = (float)Convert.ToDouble(line2);

                }
                if (line1 == "20")
                {
                    y1 = (float)Convert.ToDouble(line2);

                }

                if (line1 == "30")
                {
                    z1 = (float)Convert.ToDouble(line2);

                }


                if (line1 == "40")
                {
                    radius = (float)Convert.ToDouble(line2);

                    if (x1 + radius > XMax)
                        XMax = x1 + radius;

                    if (x1 - radius < XMin)
                        XMin = x1 - radius;

                    if (y1 + radius > YMax)
                        YMax = y1 + radius;

                    if (y1 - radius < YMin)
                        YMin = y1 - radius;
                }
            }
            while (line1 != "40");

            stu1.fXPos = x1;
            stu1.fYPos = y1;
            stu1.fZPos = z1;
            stu1.fRPos = radius;

            stuCircleArray.Add(stu1);
        }
        private static void ArcModule(StreamReader reader, ref float x1, ref float y1, ref float x2, ref float y2, ref float radius)        //解析DXF文件中圆弧
        {
            string line1, line2;
            line1 = "0";
            line2 = "0";
            float ptx = 0;
            float pty = 0;
            x1 = 0;
            y1 = 0;
            x2 = 0;
            y2 = 0;
            radius = 0;
            float angle1 = 0;
            float angle2 = 0;
            float i = 0;
            float j = 0;

            DataArcStruct stu1;
            do
            {
                GetLineCouple(reader, out line1, out line2);
                if (line1 == "10")
                {
                    ptx = (float)Convert.ToDouble(line2);
                    if (ptx > XMax)
                        XMax = ptx;
                    if (ptx < XMin)
                        XMin = ptx;
                }
                if (line1 == "20")
                {
                    pty = (float)Convert.ToDouble(line2);
                    if (pty > YMax)
                        YMax = pty;
                    if (pty < YMin)
                        YMin = pty;
                }
                if (line1 == "40")
                {
                    radius = (float)Convert.ToDouble(line2);

                    if (ptx + radius > XMax)
                        XMax = ptx + radius;

                    if (ptx - radius < XMin)
                        XMin = ptx - radius;

                    if (pty + radius > YMax)
                        YMax = pty + radius;

                    if (pty - radius < YMin)
                        YMin = pty - radius;
                }
                if (line1 == "50")
                    angle1 = (float)Convert.ToDouble(line2);

                if (line1 == "51")
                    angle2 = (float)Convert.ToDouble(line2);
            }
            while (line1 != "51");

            x1 = ptx + (float)Math.Cos(angle1 / 180.0 * Math.PI) * radius;
            y1 = pty + (float)Math.Sin(angle1 / 180.0 * Math.PI) * radius;
            x2 = ptx + (float)Math.Cos(angle2 / 180.0 * Math.PI) * radius;
            y2 = pty + (float)Math.Sin(angle2 / 180.0 * Math.PI) * radius;
            i = ptx - x1;
            j = pty - y1;
            stu1.fXPos = x1;
            stu1.fYPos = y1;
            stu1.fX1Pos = x2;
            stu1.fY1Pos = y2;
            stu1.fIPos = i;
            stu1.fJPos = j;
            stu1.fRPos = radius;
            stu1.fptXPos = ptx;
            stu1.fptYPos = pty;
            stu1.fAngle1Pos = angle1;
            stu1.fAngle2Pos = angle2;
            stuArcArray.Add(stu1);
            //这部分与绘图编辑器有关。从dxf文件中获取的数据

            //             if ((Math.Abs(XMax) - Math.Abs(XMin)) > this.pictureBox1.Size.Width)
            //             {
            //                 scaleX = (double)(this.pictureBox1.Size.Width) / (double)(Math.Abs(XMax) - Math.Abs(XMin));
            //             }
            //             else
            //                 scaleX = 1;
            // 
            // 
            //             if ((Math.Abs(YMax) - Math.Abs(YMin)) > this.pictureBox1.Size.Height)
            //             {
            //                 scaleY = (double)(this.pictureBox1.Size.Height) / (double)(Math.Abs(YMax) - Math.Abs(YMin));
            //             }
            //             else
            //                 scaleY = 1;
            // 
            //             mainScale = Math.Min(scaleX, scaleY);
            // 
            // 
            //             int ix = drawingList.Add(new arc(new Point((int)x1, (int)-y1), radius, angle1, angle2, Color.White, Color.Red, 1));
            //             objectIdentifier.Add(new DrawingObject(6, ix));
        }
        private static void PolylineModule(StreamReader reader)                    //解析DXF文件中折线
        {
            string line1, line2;
            line1 = "0";
            line2 = "0";

            float x1 = 0;
            float y1 = 0;
            float x2 = 0;
            float y2 = 0;
            int count = 0;
            int num = 1;
            DataPolyLineStruct stu1 = new DataPolyLineStruct();
            do
            {
                GetLineCouple(reader, out line1, out line2);

                if (line1 == "10")
                {
                    if (count <= 1)
                    {
                        x1 = (float)Convert.ToDouble(line2);
                    }
                    else
                    {
                        x2 = (float)Convert.ToDouble(line2);
                    }
                }
                if (line1 == "20")
                {
                    if (count <= 1)
                    {
                        y1 = (float)Convert.ToDouble(line2);
                    }
                    else
                    {
                        y2 = (float)Convert.ToDouble(line2);
                    }
                }
                if (line1 == "0" && line2 == "VERTEX")
                {
                    if (count > 1)
                    {
                        stu1.fX1Pos = x1;
                        stu1.fX2Pos = x2;
                        stu1.fY1Pos = y1;
                        stu1.fY2Pos = y2;
                        stu1.iNum = num;
                        stuPolyLineArray.Add(stu1);
                        x1 = x2;
                        y1 = y2;
                        num++;
                    }
                    count += 1;
                }
            }
            while (line2 != "SEQEND");
        }
    }
}