using iTextSharp.text;
using iTextSharp.text.pdf;
using iTextSharp.text.pdf.parser;
using iWare_SCADA_BusinessLogical.Properties;
using Newtonsoft.Json.Linq;
using Spire.Additions.Xps.Schema;
using Spire.Pdf;
using System;
using System.Collections.Generic;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Runtime;
using System.Text;
using Resources = iWare_SCADA_BusinessLogical.Properties.Resources;

namespace iWare_SCADA_BusinessLogical.Utils
{
    /// <summary>
    /// 文件帮助
    /// </summary>
    public class FileHelper
    {
        private static char[] base64CodeArray = new char[]
        {
            'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z',
            'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z',
            '0', '1', '2', '3', '4',  '5', '6', '7', '8', '9', '+', '/', '='
        };




        /// <summary>
        /// 判断一个文件是否是图片
        /// </summary>
        /// <param name="name"></param>
        /// <returns></returns>
        public static bool IsImage(string name)
        {
            var extension = System.IO.Path.GetExtension(name).ToLower();

            var imageExtensions = new List<string> { ".jpg", ".png", ".ico", ".tif", ".bmp", ".gif" };
            return imageExtensions.Contains(extension);
        }

        /// <summary>
        /// 判断一个文件是否为pdf文件
        /// </summary>
        /// <param name="name"></param>
        /// <returns></returns>
        public static bool IsPdf(string name)
        {
            var extension = System.IO.Path.GetExtension(name).ToLower();
            var pdfExtensions = new List<string> { ".pdf" };
            return pdfExtensions.Contains(extension);
        }

        /// <summary>
        /// 将指定路径下的文件转为byte数组
        /// </summary>
        /// <param name="path">指定路径</param>
        /// <returns></returns>
        public static byte[] GetBytesByFile(string path)
        {
            try
            {
                if (!File.Exists(path))
                {
                    return new byte[0];
                }

                var fileInfo = new FileInfo(path);
                byte[] buff = new byte[fileInfo.Length];

                var fileStream = fileInfo.OpenRead();
                fileStream.Read(buff, 0, int.Parse(fileStream.Length.ToString()));
                fileStream.Close();
                return buff;
            }
            catch (Exception ex)
            {
                LogTextHelper.WriteLog(Resources.LogDir, "FileHelper", "GetBytesByFile", ex.Message);
                return new byte[0];
            }
        }

        /// <summary>
        /// 将指定路径下的图片转成base64字符串
        /// </summary>
        /// <param name="path"></param>
        /// <returns></returns>
        public static string GetBase64Str(string path)
        {

            try
            {

                using (MemoryStream ms1 = new MemoryStream())
                {
                    var bmp1 = new Bitmap(path);
                    bmp1.Save(ms1, System.Drawing.Imaging.ImageFormat.Jpeg);
                    byte[] arr1 = new byte[ms1.Length];
                    ms1.Position = 0;
                    ms1.Read(arr1, 0, (int)ms1.Length);
                    ms1.Close();
                    bmp1.Dispose();
                    return Convert.ToBase64String(arr1);
                }
            }
            catch (Exception ex)
            {
                LogTextHelper.WriteLog(Resources.LogDir, "FileHelper", "GetBytesByFile", ex.Message);
                return null;
            }
        }


        public static string GetBase64Str(Bitmap bitMap)
        {

            try
            {

                using (MemoryStream ms1 = new MemoryStream())
                {
                    bitMap.Save(ms1, System.Drawing.Imaging.ImageFormat.Jpeg);
                    byte[] arr1 = new byte[ms1.Length];
                    ms1.Position = 0;
                    ms1.Read(arr1, 0, (int)ms1.Length);
                    ms1.Close();
                    return Convert.ToBase64String(arr1);
                }
            }
            catch (Exception ex)
            {
                LogTextHelper.WriteLog(Resources.LogDir, "FileHelper", "GetBytesByFile", ex.Message);
                return null;
            }
        }

        /// <summary>
        /// 是否base64字符串
        /// </summary>
        /// <param name="base64Str">要判断的字符串</param>
        /// <param name="bytes">字符串转换成的字节数组</param>
        /// <returns></returns>
        public static bool IsBase64(string base64Str, out byte[] bytes)
        {
            //string strRegex = "^([A-Za-z0-9+/]{4})*([A-Za-z0-9+/]{4}|[A-Za-z0-9+/]{3}=|[A-Za-z0-9+/]{2}==)$";
            bytes = null;
            if (string.IsNullOrEmpty(base64Str))
                return false;
            else
            {
                if (base64Str.Contains(","))
                    base64Str = base64Str.Split(',')[1];
                if (base64Str.Length % 4 != 0)
                    return false;
                if (base64Str.Any(c => !base64CodeArray.Contains(c)))
                    return false;
            }
            try
            {
                bytes = Convert.FromBase64String(base64Str);
                return true;
            }
            catch (FormatException)
            {
                return false;
            }
        }

        /// <summary>
        /// 把base64字符串转换成Bitmap
        /// </summary>
        /// <param name="base64Str">要转换的base64字符串</param>
        /// <returns></returns>
        public static Bitmap Base64ToBitmap(string base64Str)
        {
            Bitmap bitmap = null;
            byte[] bytes = null;
            try
            {
                if (IsBase64(base64Str, out bytes))
                {
                    using (MemoryStream stream = new MemoryStream(bytes))
                    {
                        stream.Seek(0, SeekOrigin.Begin);//为了避免有时候流指针定位错误，显式定义一下指针位置
                        bitmap = new Bitmap(stream);
                    }
                }
            }
            catch (Exception)
            {
                bitmap = null;
            }
            return bitmap;
        }


        /// <summary>
        /// 删除文件夹strDir中nDays天以前的文件
        /// </summary>
        /// <param name="dir"></param>
        /// <param name="days"></param>
        public static void DeleteOldFiles(string dir, int days)
        {
            try
            {
                if (!Directory.Exists(dir) || days < 1) return;

                var now = DateTime.Now;
                foreach (var f in Directory.GetFileSystemEntries(dir).Where(f => File.Exists(f)))
                {
                    var t = File.GetCreationTime(f);

                    var elapsedTicks = now.Ticks - t.Ticks;
                    var elapsedSpan = new TimeSpan(elapsedTicks);

                    if (elapsedSpan.TotalDays > days) File.Delete(f);
                }
            }
            catch (Exception)
            {
                // ignored
            }
        }

        /// <summary>
        /// serch new file
        /// </summary>
        /// <returns></returns>
        public static System.Collections.IEnumerable DetectNewFilesCSV(string MonitorDicPath,int seconds,DateTime startTime,DateTime endTime)
        {
            FindFiles findFiles;
            string localpath = MonitorDicPath;

            findFiles = new FindFiles();
            findFiles.SearchPath = localpath;
            findFiles.ReturnStringType = false;
            //   findFiles.SearchPattern = "*.XML-1";
            findFiles.SearchPattern = "*.csv";
            findFiles.SearchForDirectory = false;
            findFiles.SearchForFile = true;
            //findFiles.SearchCreationTime = LastTime;//不等于时间
            //findFiles.SearchCreationEndTime = DateTime.Now.AddMinutes(-5);
            //findFiles.SearchModifyTime = DateTimeHelper.GetDateTime().AddSeconds(-seconds);//不等于时间
            findFiles.SearchModifyTime = startTime.AddSeconds(-seconds);//不等于时间
            findFiles.SearchModifyEndTime = endTime;
            return findFiles;
        }
        /// <summary>
        /// serch new file
        /// </summary>
        /// <param name="MonitorDicPath"></param>
        /// <param name="seconds"></param>
        /// <param name="SearchPattern">*.csv</param>
        /// <param name="startTime"></param>
        /// <param name="endTime"></param>
        /// <returns></returns>
        public static System.Collections.IEnumerable DetectNewFiles(string MonitorDicPath, string SearchPattern, int seconds, DateTime startTime, DateTime endTime)
        {
            FindFiles findFiles;
            string localpath = MonitorDicPath;

            findFiles = new FindFiles();
            findFiles.SearchPath = localpath;
            findFiles.ReturnStringType = false;
            //   findFiles.SearchPattern = "*.XML-1";
            findFiles.SearchPattern =string.IsNullOrEmpty(SearchPattern)?"*.csv": SearchPattern;
            findFiles.SearchForDirectory = false;
            findFiles.SearchForFile = true;
            //findFiles.SearchCreationTime = LastTime;//不等于时间
            //findFiles.SearchCreationEndTime = DateTime.Now.AddMinutes(-5);
            //findFiles.SearchModifyTime = DateTimeHelper.GetDateTime().AddSeconds(-seconds);//不等于时间
            findFiles.SearchModifyTime = startTime.AddSeconds(-seconds);//不等于时间
            findFiles.SearchModifyEndTime = endTime;
            return findFiles;
        }

        //public static string[] ReadPdf(string path)
        //{
        //    PdfReader pdfreader = new PdfReader(path);
        //    string text = iTextSharp.text.pdf.parser.PdfTextExtractor.GetTextFromPage(pdfreader, 1);
        //    string[] words = text.Split('\n');
        //    pdfreader.Close();
        //    return words;

        //}
        public static string ReadPdfFileForSpire(string fileName, string getPdfValue)
        {
            try
            {
                //FreeSpire读取PDF
                PdfReader reader = new PdfReader(fileName);

                int iPageNum = reader.NumberOfPages;
                //if (iPageNum <= 10)//Spire超过10页的会出问题
                //{
                //实例化pdfdocment对象
                Spire.Pdf.PdfDocument doc = new Spire.Pdf.PdfDocument();
                //加载pdf文件
                doc.LoadFromFile(fileName);
                //实例化一个StringBuilder 对象
                StringBuilder content = new StringBuilder();
                //提取PDF所有页面的文本
                foreach (PdfPageBase page in doc.Pages)
                {
                    content.Append(page.ExtractText());
                }
                var text = content.ToString();
                string[] words = text.Split('\n');
                if (getPdfValue.Equals("Result"))
                {
                    var list = words[0].Split(' ');
                    //取第一行最后一个值就是质量结果
                    var Result = list[list.Length - 1].Replace("\r", "");
                    return Result;
                }
                //}
                foreach (var item in words)
                {
                    if (item.Contains(getPdfValue))
                    {
                        string[] splitValue = item.Split(':');
                        if (splitValue.Count() > 1)
                        {
                            var spectlist= splitValue[1].Trim().Split(' ');
                            return spectlist[0].Trim();
                        }
                    }
                }
            }
            catch(Exception ex)
            {

            }
            return "";
        }
        public static string ReadPdfConntent(string filePath, string getPdfValue)
        {
            List<string> lst = new List<string>();
            try
            {
                string pdffilename = filePath;
                PdfReader pdfreader = new PdfReader(pdffilename);
                PdfReader.unethicalreading = true;
                int numberOfPages = pdfreader.NumberOfPages;

                //for (int i = 1; i <= numberOfPages; ++i)
                //{
                //    lst.Add(iTextSharp.text.pdf.parser.PdfTextExtractor.GetTextFromPage(pdfreader,i));
                //    text.AppendLine();
                //}

                var pdfReader = new PdfReader(pdffilename);
                StreamWriter output = new StreamWriter(new FileStream("处理结果.txt", FileMode.Create));

                int pageCount = pdfReader.NumberOfPages;
                for (int pg = 1; pg <= pageCount; pg++)
                {
                    ITextExtractionStrategy strategy = new SimpleTextExtractionStrategy();
                    var value = PdfTextExtractor.GetTextFromPage(pdfReader, pg, strategy);
                    value = value.Replace(" ", "");
                    Console.WriteLine(value);
                    output.Write(value);
                }

                output.Flush();
                output.Close();

                string text = iTextSharp.text.pdf.parser.PdfTextExtractor.GetTextFromPage(pdfreader, 1);

                string[] words = text.Split('\n');

                foreach (var item in words)
                {
                    string value = Encoding.UTF8.GetString(Encoding.UTF8.GetBytes(item));

                    if (value.Contains(getPdfValue))
                    {
                        string[] splitValue = value.Split(':');
                        lst.Add(splitValue[1].Trim());
                    }
                }

                pdfreader.Close();
                return lst.First();
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

    }
}