using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.IO.Packaging;
using Ionic.Zip;

namespace Bowin.Common
{
    public class ZIPHelper
    {
        public static IList<string> ExtractFile(string zipFilePath, string targetPath)
        {
            IList<string> result = new List<string>();

            using (Package zip = Package.Open(zipFilePath, FileMode.OpenOrCreate))
            {
                var parts = zip.GetParts();

                foreach (var part in parts)
                {
                    var stream = part.GetStream();
                    byte[] buffer = new byte[stream.Length + 100];
                    long total = 0;
                    for (int offset = 0; ; )
                    {
                        int bytesRead = stream.Read(buffer, offset, 100);
                        if (bytesRead == 0) break;
                        offset += bytesRead;
                        total += bytesRead;
                    }
                    string filePath = targetPath + @"\" + Path.GetFileName(part.Uri.LocalPath);

                    var fileStream = File.Create(filePath);
                    for (int offset = 0; ; )
                    {
                        if (total - (offset + 1) > 100)
                        {
                            fileStream.Write(buffer, offset, 100);
                            offset += 100;
                        }
                        else
                        {
                            fileStream.Write(buffer, offset, Convert.ToInt32(total - (offset + 1)));
                            fileStream.Flush();
                            break;
                        }
                    }

                    result.Add(filePath);
                }
            }

            return result;
        }

        /// <summary>
        /// 解压缩.z文件
        /// </summary>
        /// <param name="rarFilePath"></param>
        /// <returns></returns>
        public static IList<string> ExtractZFile(string zFilePath, string outPutPath)
        {
            IList<string> result = new List<string>();
            System.Diagnostics.Process proc = new System.Diagnostics.Process();
            string pathOf7Zip = System.Configuration.ConfigurationManager.AppSettings["PathOf7Zip"];
            if (System.Web.HttpContext.Current != null)
            {
                pathOf7Zip = System.Web.HttpContext.Current.Server.MapPath("~/") + pathOf7Zip;
            }
            else
            {
                pathOf7Zip = System.AppDomain.CurrentDomain.BaseDirectory + pathOf7Zip;
            }
            proc.StartInfo.FileName = pathOf7Zip;
            proc.StartInfo.CreateNoWindow = true;
            proc.StartInfo.UseShellExecute = false;
            proc.StartInfo.RedirectStandardOutput = true;
            proc.StartInfo.RedirectStandardInput = true;

            proc.StartInfo.Arguments = "l " + zFilePath;

            bool currentIsFile = false;
            try
            {
                proc.Start();
                do
                {
                    if (proc.StandardOutput.EndOfStream)
                    {
                        break;
                    }
                    string buffer = proc.StandardOutput.ReadLine();

                    if (buffer.StartsWith("----"))
                    {
                        currentIsFile = !currentIsFile;
                    }
                    else
                    {
                        if (currentIsFile)
                        {
                            result.Add(outPutPath + @"\" + buffer.Split(' ').Last());
                        }
                    }
                }
                while (true);
                proc.WaitForExit();
                //if (!proc.WaitForExit(3600000))
                //{

                //}
                proc = new System.Diagnostics.Process();
                proc.StartInfo.FileName = pathOf7Zip;
                proc.StartInfo.CreateNoWindow = true;
                proc.StartInfo.UseShellExecute = false;
                proc.StartInfo.RedirectStandardOutput = false;
                proc.StartInfo.RedirectStandardInput = false;
                proc.EnableRaisingEvents = true;
                proc.StartInfo.Arguments = "e -y -o" + outPutPath + " " + zFilePath;
                proc.Start();
                proc.WaitForExit();
                proc.Close();
            }
            catch (Exception ex)
            {
                Exception MyEx = new Exception("解压缩出错！" + ex.Message);
            }

            proc.Dispose();
            return result;
        }

        public static string PackageDirectory(string path)
        {
            using (ZipFile zipNew = new ZipFile())
            {
                var pathName = Path.GetFileName(path.TrimEnd('\\'));
                var fileInfos = Directory.GetFiles(path);
                zipNew.UseUnicodeAsNecessary = true;
                //zipNew.
                // add this map file into the "images" directory in the zip archive
                //zip.AddFile("c:\\images\\personal\\7440-N49th.png", "images");
                //// add the report into a different directory in the archive
                //zip.AddFile("c:\\Reports\\2008-Regional-Sales-Report.pdf", "files");
                foreach (var fileInfo in fileInfos)
                {
                    zipNew.AlternateEncodingUsage = ZipOption.AsNecessary;
                    zipNew.AlternateEncoding = Encoding.Unicode;
                    zipNew.AddFile(fileInfo, @"\");
                }
                zipNew.Save(pathName + ".zip");

                return path.TrimEnd('\\') + "\\" + pathName + ".zip";
            }
        }
    }
}