using Estsh.Client.Base;
using System.Data;
using System.Net.Sockets;
using System.Runtime.InteropServices;
using System.Text;

namespace Estsh.Client.ZPLPrinter
{
    /// <summary>
    /// 中文字符串类
    /// </summary>
    public class CNStr
    {
        public string Id;
        public string Text;
        public int XPos;
        public int YPos;
        public int Height;
    }

    /// <summary>
    /// 使用 ZPL 指令直接打印条码
    /// </summary>
    public class PrintSNByZPL : StepBase
    {
        /// <summary>
        /// 打印条码
        /// </summary>
        /// <param name="snData">数据源</param>
        /// <param name="templateFile">ZPL模板名称</param>
        /// <param name="printerIP">打印机IP地址</param>
        /// <param name="printerPort">打印机端口号</param>
        /// <param name="copies">打印份数</param>
        /// <returns>是否打印成功</returns>
        public bool PrintSerialNumber(List<dynamic> snData, string templateFile, string printerIP, int printerPort, int copies)
        {
            if (snData == null || snData.Count == 0)
            {
                ShowMessage(this, "未包含打印数据！");
                return false;
            }

            if (!File.Exists(templateFile))
            {
                ShowMessage(this, "文件不存在！" + templateFile);
                return false;
            }

            // 此处最好加上 Ping 打印机的指令

            // 存放处理好的打印指令，统一输出到打印机
            List<string> PrintPool = new List<string>();

            // 单个条码的打印指令
            StringBuilder ZPLString = new StringBuilder(10 * 1024);

            // 单个条码中的所有中文字符串
            List<CNStr> CNStrs = new List<CNStr>();

            // 处理 ZPL 模板文件
            using (StreamReader sr = new StreamReader(templateFile))
            {
                while (!sr.EndOfStream)
                {
                    string NewLine = sr.ReadLine();

                    // 有中文字符优先处理
                    if (NewLine.Contains("<CNStr:"))
                    {
                        CNStr cnStr = new CNStr();

                        string[] ArrayStr = NewLine.Replace(">", "").Split(':');

                        ArrayStr = ArrayStr[1].Split(',');

                        cnStr.Id = ArrayStr[0];
                        cnStr.XPos = Convert.ToInt32(ArrayStr[1]);
                        cnStr.YPos = Convert.ToInt32(ArrayStr[2]);
                        cnStr.Height = Convert.ToInt32(ArrayStr[3]);

                        CNStrs.Add(cnStr);
                    }
                    else
                    {
                        ZPLString.Append(NewLine);
                        ZPLString.Append(Environment.NewLine);
                    }
                }
            }

            // 遍历数据行
            foreach (var dr in snData)
            {
                // 每个标签的打印指令
                StringBuilder NewPrintZPLString = new StringBuilder(ZPLString.ToString());

                // 遍历每一列
                foreach (var dc in dr.GetType().GetProperties())
                {
                    // 替换非中文字符变量，<VarName> 格式表示
                    NewPrintZPLString.Replace(string.Format("<{0}>", dc.Name.Trim()), dr[dc.Name].ToString());
                }
                // 处理所有的中文字符串
                foreach (CNStr cnStr in CNStrs)
                {
                    if (dr.GetType().GetProperties().Contains(cnStr.Id))
                    {
                        // 如果数据源中存在这个字段，则替换具体的变量值
                        cnStr.Text = dr[cnStr.Id].ToString();
                    }
                    else
                    {
                        // 数据源中不存在这个字段就清空，防止残留变量值
                        cnStr.Text = string.Empty;
                    }
                }
                NewPrintZPLString.Append(GetZPLStringByCNStrs(CNStrs));

                // 按照打印份数加入打印队列
                for(int i=0;  i < copies; i++)
                {
                    PrintPool.Add(NewPrintZPLString.ToString());
                }
            }
            // 输出到打印机
            return PrintZPL(printerIP, printerPort, PrintPool);
        }

        /// <summary>
        /// 把处理好的 ZPL 指令队列输出到打印机
        /// </summary>
        /// <param name="printerIP">打印机 IP 地址</param>
        /// <param name="printerPort">打印机端口号</param>
        /// <param name="zpls">ZPL指令队列</param>
        public bool PrintZPL(string printerIP, int printerPort, List<string> zpls)
        {
            try
            {
                using (StreamWriter sw = new StreamWriter("log_" + DateTime.Now.ToString("yyyyMMdd") + ".txt", true))
                {
                    sw.WriteLine(string.Format("{0}", 1));
                    sw.Flush();
                    sw.Close();
                }
                using (TcpClient client = new TcpClient())
                {
                    client.Connect(printerIP, printerPort);

                    using (StreamWriter writer = new StreamWriter(client.GetStream()))
                    {
                        foreach (string zpl in zpls)
                        {
                            writer.Write(zpl);
                            using (StreamWriter sw = new StreamWriter("log_" + DateTime.Now.ToString("yyyyMMdd") + ".txt", true))
                            {
                                sw.WriteLine(string.Format("{0}", zpl));
                                sw.Flush();
                                sw.Close();
                            }
                            writer.Flush();

                            // 等待传输完成
                            Thread.Sleep(10);
                        }

                        writer.Close();
                    }

                    client.Close();
                }

                return true;
            }
            catch
            {
                using (StreamWriter sw = new StreamWriter("log_" + DateTime.Now.ToString("yyyyMMdd") + ".txt", true))
                {
                    sw.WriteLine(string.Format("{0}", 2));
                    sw.Flush();
                    sw.Close();
                }
                return false;
            }
        }

        // 获取字符串的点阵信息，用于 ZPL 中文打印
        [DllImport(@"FNTHEX32.DLL", CharSet = CharSet.Ansi)]
        public static extern int GETFONTHEX(
                          string chnstr,
                          string fontname,
                          string chnname,
                          int orient,
                          int height,
                          int width,
                          int bold,
                          int italic,
                          StringBuilder param1);

        /// <summary>
        /// 中文文本转化成点阵字符串
        /// </summary>
        /// <param name="text">中文文本</param>
        /// <param name="textId">文本的ID，不能重复</param>
        /// <param name="height">文本的高度</param>
        /// <returns>点阵字符串</returns>
        public string TextToHex(string text, string textId, int height)
        {
            StringBuilder hexBuilder = new StringBuilder(8 * 2048);

            int subStrCount = 0;

            subStrCount = GETFONTHEX(text, "Arial", textId, 0, height, 0, 1, 0, hexBuilder);

            return hexBuilder.ToString().Substring(0, subStrCount);
        }

        /// <summary>
        /// 根据一组中文字符串信息获取对应的 ZPL 打印指令
        /// </summary>
        /// <param name="cnStrs">中文变量集合</param>
        private string GetZPLStringByCNStrs(List<CNStr> cnStrs)
        {
            string labelIdCmd = string.Empty;
            string labelContentCmd = string.Empty;

            int count = 0;

            foreach (CNStr str in cnStrs)
            {
                if (!string.IsNullOrEmpty(str.Text))
                {
                    labelIdCmd += "^FT" + str.XPos.ToString() + "," + str.YPos.ToString() + "^XG" + str.Id + ",1,1^FS";
                    labelContentCmd += TextToHex(str.Text, str.Id, str.Height);

                    count++;
                }
            }

            string content = string.Empty;

            if (count > 0)
            {
                content = labelContentCmd
                + "^LH0,0^PR2,2^FO0,0"
                + labelIdCmd;
            }

            content  += "^PQ1,0,1,Y^XZ";

            return content;
        }
    }
}