using Microsoft.Reporting.WinForms;
using System;
using System.Collections.Generic;
using System.Data;
using System.Drawing;
using System.Drawing.Imaging;
using System.Drawing.Printing;
using System.IO;
using System.Linq;
using System.Text;
using ZXing;
using ZXing.Common;

namespace HighWay.PrintLable
{
    public class PrintHelper
    {
        #region 方法 -> 打印列表
        private IList<Stream> m_streams;//声明一个Stream对象的列表用来保存报表的输出数据,LocalReport对象的Render方法会将报表按页输出为多个Stream对象
        private bool isLandSapces = false;
        EncodingOptions options = null;
        BarcodeWriter writer = null;
        int page = 0;
        string RdlcUrl;
        DataTable GoodsTable;
        decimal PageLeft;
        decimal PageRight;
        decimal PageTop;
        decimal PageBottom;

        #region 打印
        /// <summary>
        /// 打印
        /// </summary>
        /// <param name="goodsTable">打印列表</param>
        /// <param name="rdlcUrl">报表路径</param>
        /// <param name="pageLeft">左边距</param>
        /// <param name="pageRight">右边距</param>
        /// <param name="pageTop">上边距</param>
        /// <param name="pageBottom">下边距</param>
        /// <returns></returns>
        public bool Print(DataTable goodsTable, string rdlcUrl, decimal pageLeft = 0, decimal pageRight = 0, decimal pageTop = 0, decimal pageBottom = 0)
        {
            RdlcUrl = rdlcUrl;
            GoodsTable = goodsTable;
            PageLeft = pageLeft;
            PageRight = pageRight;
            PageTop = pageTop;
            PageBottom = pageBottom;
            //获取当前已勾选条码用于生产数据源，如果无则跳出
            if (goodsTable.Rows.Count <= 0)
            {
                return false;
            }
            //判断系统是否有已连接的打印机
            if (PrinterSettings.InstalledPrinters.Count == 0)
            {
                System.Windows.MessageBox.Show("未检测到打印机，请先安装打印机", "系统提示");
                return false;
            }
            //判断是否超过1000条数据(数据过多会出现打印错误)
            if (goodsTable.Rows.Count > 1000)
            {
                //txtMessage.Text = "最多一次只可打印1000条!";
                return false;
            }
            using (PrintDocument printDocument = new PrintDocument())//创建对象
            {
                //打印开始前
                printDocument.BeginPrint += new PrintEventHandler(printDocument_BeginPrint);
                //打印输出（过程）
                printDocument.PrintPage += new PrintPageEventHandler(printDocument_PrintPage);
                //打印结束
                printDocument.EndPrint += new PrintEventHandler(printDocument_EndPrint);
                //跳出打印对话框，提供打印参数可视化设置，如选择哪个打印机打印此文档等
                System.Windows.Forms.PrintDialog pd = new System.Windows.Forms.PrintDialog();
                pd.Document = printDocument;
                if (System.Windows.Forms.DialogResult.OK == pd.ShowDialog()) //如果确认，将会覆盖所有的打印参数设置
                {
                    printDocument.Print(); //打印
                }
            }
            return true;
        }
        #endregion

        #region 打印开始前绑定数据源

        #region 条码生成
        public static byte[] Bitmap2Byte(Bitmap bitmap)
        {
            using (MemoryStream stream = new MemoryStream())
            {
                bitmap.Save(stream, ImageFormat.Bmp);
                byte[] data = new byte[stream.Length];
                stream.Seek(0, SeekOrigin.Begin);
                stream.Read(data, 0, Convert.ToInt32(stream.Length));
                return data;
            }
        }
        #endregion

        #region 数据源
        void printDocument_BeginPrint(object sender, PrintEventArgs e)
        {
            #region 重写数据源
            options = new EncodingOptions
            {
                Width = 200,
                Height = 40
            };
            writer = new BarcodeWriter();
            writer.Format = BarcodeFormat.CODE_128;
            writer.Options = options;
            #endregion

            #region 加载报表源
            ReportViewer rvDoc = new ReportViewer();
            rvDoc.LocalReport.ReportEmbeddedResource = RdlcUrl;
            rvDoc.LocalReport.DataSources.Add(new ReportDataSource("DataSet1", GoodsTable));
            PrintStream(rvDoc.LocalReport);
            #endregion
        }
        #endregion

        #endregion

        #region 获取rdlc文件作为打印数据源
        private Stream CreateStream(string name, string fileNameExtension, Encoding encoding, string mimeType, bool willSeek)
        {
            //如果需要将报表输出的数据保存为文件，请使用FileStream对象。
            Stream stream = new MemoryStream();
            m_streams.Add(stream);
            return stream;
        }

        public void PrintStream(LocalReport rvDoc)
        {
            //获取LocalReport中的报表页面方向
            isLandSapces = rvDoc.GetDefaultPageSettings().IsLandscape;
            Export(rvDoc);
        }

        private void Export(LocalReport report)
        {
            //绑定打印边距
            decimal Left = PageLeft / 100;
            decimal Top = PageTop / 100;
            decimal Right = PageRight / 100;
            decimal Bottom = PageBottom / 100;
            string deviceInfo =
                "<DeviceInfo>" +
                "  <OutputFormat>EMF</OutputFormat>" +
                "  <MarginTop>" + Top + "in</MarginTop>" +
                "  <MarginLeft>" + Left + "in</MarginLeft>" +
                "  <MarginRight>" + Right + "in</MarginRight>" +
                "  <MarginBottom>" + Bottom + "in</MarginBottom>" +
                "</DeviceInfo>";
            Warning[] warnings;
            m_streams = new List<Stream>();
            //将报表的内容按照deviceInfo指定的格式输出到CreateStream函数提供的Stream中。
            report.Render("Image", deviceInfo, CreateStream, out warnings);
            foreach (Stream stream in m_streams)
                stream.Position = 0;
        }

        void printDocument_PrintPage(object sender, PrintPageEventArgs e)
        {
            //打印啥东东就在这写了
            //Metafile对象用来保存EMF或WMF格式的图形，
            //我们在前面将报表的内容输出为EMF图形格式的数据流。
            Metafile pageImage = new Metafile(m_streams[page]);
            //调整打印机区域的边距
            System.Drawing.Rectangle adjustedRect = new System.Drawing.Rectangle(0, 0, e.PageBounds.Width, e.PageBounds.Height);
            //获取报告内容
            //这里的Graphics对象实际指向了打印机
            e.Graphics.DrawImage(pageImage, e.PageBounds);
            page++;
            //设置是否需要继续打印
            e.HasMorePages = (page < m_streams.Count);
            if (page == m_streams.Count)
            {
                page = 0;
                m_streams = null;
            }
        }
        #endregion

        #region 打印结束后触发
        static void printDocument_EndPrint(object sender, PrintEventArgs e)
        {
        }
        #endregion

        #endregion
    }
}