using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO.Compression;
using System.Linq;
using System.Text;
using System.Text.Unicode;
using System.Threading.Tasks;


using SharpCompress.Common;
using SharpCompress.Factories;
using SharpCompress.Writers;
using SharpCompress.Compressors;

using SharpCompress.Archives;
using SharpCompress.Archives.Zip;
using SharpCompress.Archives.Rar;
using SharpCompress.Archives.GZip;
using SharpCompress.Archives.Tar;
using SharpCompress.Archives.SevenZip;
using SharpCompress.Readers;

namespace SharpCompressStudy.Core
{
    public static class CommonUtility
    {
        /// <summary>
        /// 解压文件
        /// </summary>
        /// <param name="fileName">压缩文件包</param>
        /// <param name="isDelete">解压后删除压缩文件</param>
        public static void Decompress(string fileName, bool isDelete)
        {
            var extName = Path.GetExtension(fileName).Trim().ToLower();
            switch (extName)
            {
                case ".rar":
                    DecompressRarFile(fileName, isDelete);
                    break;

                case ".zip":
                    DecompressZipFile(fileName, isDelete);
                    break;

                case ".gzip":
                    DecompressGzipFile(fileName, isDelete);
                    break;

                case ".gz":
                    DecompressGzFile(fileName, isDelete);
                    break;

                default:
                    break;
            }

            if (isDelete)
            {
                File.Delete(fileName);
            }
        }

        private static void DecompressRarFile(string fileName, bool isDelete)
        {
            ArgumentNullException.ThrowIfNull(fileName);

            var extName = Path.GetExtension(fileName);

            var descDir = Path.Combine(Path.GetDirectoryName(fileName)!, new FileInfo(fileName).Name.Replace(extName,"") + "\\");

            if (!Directory.Exists(descDir))
            {
                Directory.CreateDirectory(descDir);
            }

            try
            {
                using (Stream stream = File.OpenRead(fileName))
                {
                    var reader = ReaderFactory.Open(stream);
                    while (reader.MoveToNextEntry())
                    {
                        if (!reader.Entry.IsDirectory)
                        {
                            Console.WriteLine(reader.Entry.Key);
                            reader.WriteEntryToDirectory(descDir, new ExtractionOptions() { ExtractFullPath = true, Overwrite = true });
                        }
                    }
                }


                if (isDelete)
                {
                    File.Delete(fileName);
                }

            }
            catch (Exception ex)
            {
                Console.Write($"解压报错,错误：{ex}");
                throw;
            }
        }

        private static void DecompressZipFile(string fileName, bool isDelete)
        {
            try
            {
                ExtractionOptions options = new ExtractionOptions();

                //抽取顶级目录
                var extractPath = Directory.GetParent(fileName)?.FullName + "22";
                if (!Directory.Exists(extractPath))
                {
                    Directory.CreateDirectory(extractPath);
                }


                var archive = ArchiveFactory.Open(fileName);
                foreach (var entry in archive.Entries)
                {
                    //加密的
                    if (entry.IsEncrypted)
                    {
                        continue;
                    }

                    if (entry.IsDirectory)
                    {

                    }
                    else
                    {
                        entry.WriteToDirectory(extractPath, new ExtractionOptions() { ExtractFullPath = true, Overwrite = true });
                    }
                }



                if (isDelete)
                {
                    File.Delete(fileName);
                }

            }
            catch (Exception ex)
            {
                Console.Write($"解压报错,错误：{ex.Message}");
                throw;
            }
        }

        private static void DecompressGzipFile(string fileName, bool isDelete)
        {
            try
            {

                if (isDelete)
                {
                    File.Delete(fileName);
                }

            }
            catch (Exception ex)
            {
                Console.Write($"解压报错,错误：{ex}");
                throw;
            }
        }

        private static void DecompressGzFile(string fileName, bool isDelete)
        {
            try
            {
                if (isDelete)
                {
                    File.Delete(fileName);
                }
            }
            catch (Exception ex)
            {
                Console.Write($"解压报错,错误：{ex}");
                throw;
            }
        }
    }
}