/***********************
* 说明：PDF签名合成
* 创建人：龚宇超
* 创建日期：2018-06-07
* 修改人：
* 修改日期：
* 修改备注：
* 版本：1.0.0.0
***********************/
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data;
using Lskj.Business.Impl;
using Lskj.Util;
using System.IO;
using iTextSharp.text.pdf;
using System.Runtime.Serialization.Formatters.Binary;
using System.Drawing;
using System.Diagnostics;
using System.Threading;

namespace Lskj.Control.Model
{
    public class PdfViewerHelper
    {

        /// <summary>
        /// <para>说明：</para>
        /// <para>创建人：龚宇超</para>
        /// <para>创建日期：2018-06-11 </para>
        /// <para>修改人：</para>
        /// <para>修改日期：</para>
        /// <para>修改备注：</para>
        /// <para>版本：1.0</para>
        /// </summary>
        /// <param name="pdfFileId">PDF主键.</param>
        /// <param name="pdfFileName">PDF文件名.</param>
        /// <param name="pdfFilePath">PDF路径</param>
        public static void CreateNewPdf(int pdfFileId,string pdfFileName, string pdfFilePath)
        {
            DataTable dt = AttachImpl.GetSignSources(pdfFileId);
            if (dt.Rows.Count > 0)
            {   
                //复制一个作为读取模板，源文件作为操作流
                string newFilePath =PubUtil.MenuExcelPath + Guid.NewGuid() + ".pdf";
                File.Copy(pdfFilePath, newFilePath);

                using (Stream outputPdfStream = new FileStream(pdfFilePath, FileMode.Open, FileAccess.Write, FileShare.None))
                {
                    using (PdfReader reader = new PdfReader(newFilePath))
                    {
                        PdfStamper stamper = new PdfStamper(reader, outputPdfStream);
                        foreach (DataRow rowItem in dt.Rows)
                        {
                            //iTextSharp.text.Image 获取图片的方法直接传流会出错,先转图片
                            MemoryStream ms = new MemoryStream((byte[])rowItem["Pic"], 0, ((byte[])rowItem["Pic"]).Length);
                            BinaryFormatter bf = new BinaryFormatter();
                            object obj = bf.Deserialize(ms);
                            ms.Close();
                            Image pic = obj as Image;

                            iTextSharp.text.Image image = iTextSharp.text.Image.GetInstance(pic, pic.RawFormat);
                            PointF point = new PointF(float.Parse(rowItem["ImageX"] + ""), float.Parse(rowItem["ImageY"] + ""));
                            PdfContentByte pdfContentByte = stamper.GetOverContent(Convert.ToInt32(rowItem["Page"]) + 1);
                            float percent = image.Height / image.Width * 100;
                            image.ScalePercent(Convert.ToInt32(Math.Round(percent)));
                            image.SetAbsolutePosition(point.X, point.Y);
                            pdfContentByte.AddImage(image);
                        }
                        stamper.Close();
                    }
                }
                File.Delete(newFilePath);
            }
        }
        /// <summary>
        /// <para>说明：验证下载完成(应对不能获取下载完成消息)</para>
        /// <para>创建人：龚宇超</para>
        /// <para>创建日期：2018-06-11 </para>
        /// <para>修改人：</para>
        /// <para>修改日期：</para>
        /// <para>修改备注：</para>
        /// <para>版本：1.0</para>
        /// </summary>
        public static void VerifyDownLoadFinish(string filePath,string fileName)
        {
            int i = 0;
            //进行20次查找
            while (i < 20)
            {
                try
                {
                    if (File.Exists(filePath) && !SearchProc("LSTest"))
                    {
                        //是PDF文件就进行签名合成
                        if (fileName.Contains(".pdf"))
                        {
                          CreateNewPdf(0,fileName, filePath);
                        }
                        return;
                    }
                    Thread.Sleep(500);
                }
                catch (Exception ex)
                {
                    throw;
                }
                i++;
            }
        }
        /// <summary>
        /// <para>说明：查找进程里面是否还在下载</para>
        /// <para>创建人：龚宇超</para>
        /// <para>创建日期：2018-06-11 </para>
        /// <para>修改人：</para>
        /// <para>修改日期：</para>
        /// <para>修改备注：</para>
        /// <para>版本：1.0</para>
        /// </summary>
        /// <param name="strProcName">Name of the string proc.</param>
        /// <returns><c>true</c> if XXXX, <c>false</c> otherwise.</returns>
        public static bool SearchProc(string strProcName)
        {
            try
            {
                //精确进程名  用GetProcessesByName
                Process[] ps = Process.GetProcessesByName(strProcName);
                return ps.Length > 0;
            }
            catch
            {
                return false;
            }
        }
    }
}