using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Timers;
using Aitex.Core.RT.SCCore;
using Ionic.Zip;

namespace Aitex.Core.RT.Log
{
    public class LogManager : ICommonLog
    {
        public const int MaxLogsMonth = 3;
        public static  readonly log4net.ILog loginfo = log4net.LogManager.GetLogger("fileAppender");       
        private static Timer deleteTimer;//定义定时器,定时删除log
        private int _logsSaveDays;
        private bool _isEnableCompressLogFile;
        public void Initialize()
        {
            if (SC.ContainsItem("System.LogsSaveDays"))
            {
                _logsSaveDays = SC.GetValue<int>("System.LogsSaveDays");
            }

            if (SC.ContainsItem("System.IsEnableCompressLogFile"))
            {
                _isEnableCompressLogFile = SC.GetValue<bool>("System.IsEnableCompressLogFile");
            }
            deleteTimer = new Timer(1);
            deleteTimer.Elapsed += OnDeleteLog;
            deleteTimer.AutoReset = true;
            deleteTimer.Enabled = true;
            LOG.InnerLogger = this;
            
        }
        public void Debug(string message)
        { 
            loginfo.Debug(message);
        }
        public  void Info(string message)
        {
            loginfo.Info(message);
        }

        public void Warning(string message)
        {
            loginfo.Warn(message);
        }

      
        public void Error(string message)
        {
            loginfo.Error(message);
        }


        /// <summary>
        /// 定期删除log
        /// </summary>
        /// <returns></returns>
        void OnDeleteLog(Object source, ElapsedEventArgs e)
        {
            if (deleteTimer.Interval == 1)
            {
                deleteTimer.Interval = 60 * 1000;//每隔1分钟删除
            }
            else if (deleteTimer.Interval == 60 * 1000)
            {
                if (DateTime.Now.Hour != 0 && DateTime.Now.Minute != 10)//下一次是0点10分钟
                {
                    return;
                }
                else
                {
                    deleteTimer.Interval = 60 * 60 * 1000;
                }
            }
            else if (deleteTimer.Interval == 60 * 60 * 1000)
            {
                if (DateTime.Now.Hour != 0)
                {
                    return;
                }
            }
            try
            {
                string path = string.Format(@"{0}", "Logs");

                FileInfo[] fileInfos;
                DirectoryInfo curFolderInfo = new DirectoryInfo(path);
                fileInfos = curFolderInfo.GetFiles();
                foreach (FileInfo info in fileInfos)
                {
                    if (info.Extension == ".log" || info.Extension == ".txt" || info.Name.Contains("log"))
                    {
                        DateTime lastWriteTime = DateTime.Parse(info.LastWriteTime.ToShortDateString());
                        if (_logsSaveDays != 0)
                        {
                            DateTime intervalTime = DateTime.Now.AddDays(-_logsSaveDays);

                            if (lastWriteTime < intervalTime)
                            {
                                File.Delete(info.FullName);
                            }
                        }
                        if (_isEnableCompressLogFile && info.Extension != ".zip" && lastWriteTime < DateTime.Now.AddDays(-1))
                        {
                            if (CompressFile(info.FullName, $"{curFolderInfo.FullName}//{info.Name}.zip"))
                            {
                                File.Delete(info.FullName);
                                LOG.WriteBackgroundLog(eEvent.INFO_WINRESOURCE, "System", $"delete log successfully，logName:{info.Name}");
                            }
                        }
                    }
                }
            }
            catch(Exception ex)
            {
                LOG.WriteExeption(ex);
            }
        }

        /// <summary>
        /// 压缩文件/文件夹
        /// </summary>
        /// <param name="filePath">需要压缩的文件/文件夹路径</param>
        /// <param name="zipPath">压缩文件路径（zip后缀）</param>
        /// <param name="password">密码</param>
        /// <param name="filterExtenList">需要过滤的文件后缀名</param>
        private bool CompressFile(string filePath, string zipPath, string password = "", List<string> filterExtenList = null)
        {
            try
            {
                using (ZipFile zip = new ZipFile(Encoding.UTF8))
                {
                    if (!string.IsNullOrWhiteSpace(password))
                    {
                        zip.Password = password;
                    }
                    if (Directory.Exists(filePath))
                    {
                        if (filterExtenList == null)
                            zip.AddDirectory(filePath);
                        else
                            AddDirectory(zip, filePath, filePath, filterExtenList);
                    }
                    else if (File.Exists(filePath))
                    {
                        zip.AddFile(filePath, "");
                    }
                    zip.Save(zipPath);
                    return true;
                }
            }
            catch (Exception ex)
            {
                LOG.WriteExeption(ex);
            }
            return false;
        }
        /// <summary>
        /// 添加文件夹
        /// </summary>
        /// <param name="zip">ZipFile对象</param>
        /// <param name="dirPath">需要压缩的文件夹路径</param>
        /// <param name="rootPath">根目录路径</param>
        /// <param name="filterExtenList">需要过滤的文件后缀名</param>
        private void AddDirectory(ZipFile zip, string dirPath, string rootPath, List<string> filterExtenList)
        {
            var files = Directory.GetFiles(dirPath);
            for (int i = 0; i < files.Length; i++)
            {
                if (filterExtenList == null || (filterExtenList != null && !filterExtenList.Any(d => Path.GetExtension(files[i]).ToLower() == d.ToLower())))
                {
                    string relativePath = Path.GetFullPath(dirPath).Replace(Path.GetFullPath(rootPath), "");
                    zip.AddFile(files[i], relativePath);
                }
            }
            var dirs = Directory.GetDirectories(dirPath);
            for (int i = 0; i < dirs.Length; i++)
            {
                AddDirectory(zip, dirs[i], rootPath, filterExtenList);
            }
        }
        public void Terminate()
        {
            try
            {
                if (deleteTimer != null)
                {
                    deleteTimer.Enabled = false;
                }
            }
            catch (Exception ex)
            {
                System.Diagnostics.Trace.WriteLine(ex.Message);
            }
        }
    }
}