using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using System.Windows.Forms;
namespace PayForApp.Business
{
    public class LogHelper
    {
        public static string path = Application.StartupPath;
        private static Dictionary<long, long> lockDic = new Dictionary<long, long>();
        public static void WriteServiceLog(string LogData)
        {
            LogData = DateTime.Now.ToLongTimeString() + ":" + LogData;
            string LogName = "日志_Send" + System.DateTime.Now.Year.ToString() + "-" + System.DateTime.Now.Month.ToString() + "-" + System.DateTime.Now.Day.ToString() + ".log";
            string filename = path + "\\log\\" + LogName;
            if (!Directory.Exists(path + "\\log\\"))
                Directory.CreateDirectory(path + "\\log\\");
            using (FileStream fs = new FileStream(filename, FileMode.OpenOrCreate, FileAccess.ReadWrite, FileShare.ReadWrite, 8, FileOptions.Asynchronous))
            {
                Byte[] _data = new UTF8Encoding().GetBytes(LogData + Environment.NewLine);
                bool flag = true;
                long slen = _data.Length;
                long len = 0;
                while (flag)
                {
                    try
                    {
                        if (len >= fs.Length)
                        {
                            fs.Lock(len, slen);
                            lockDic[len] = slen;
                            flag = false;
                        }
                        else
                        {
                            len = fs.Length;
                        }
                    }
                    catch (Exception ex)
                    {
                        try
                        {
                            while (!lockDic.ContainsKey(len))
                            {
                                len += lockDic[len];
                            }
                        }
                        catch
                        {

                        }
                    }
                }
                fs.Seek(0, SeekOrigin.End);
                fs.Write(_data, 0, _data.Length);
                fs.Flush();
                fs.Close();
            }
        }
        public static void WriteServiceLog1(string LogData)
        {
            LogData = DateTime.Now.ToLongTimeString() + ":" + LogData;
            string LogName = "日志_Send" + System.DateTime.Now.Year.ToString() + "-" + System.DateTime.Now.Month.ToString() + "-" + System.DateTime.Now.Day.ToString() + ".log";
            string filename = path + "\\log\\" + LogName;
            if (!Directory.Exists(path + "\\log\\"))
                Directory.CreateDirectory(path + "\\log\\");
            FileStream fs = new FileStream(filename, FileMode.OpenOrCreate);
            fs.Seek(0, SeekOrigin.End);
            byte[] _data = new UTF8Encoding().GetBytes(LogData + "\r\n");
            fs.Write(_data, 0, _data.Length);
            fs.Flush();
            fs.Close();
        }

        public static void WriteServiceLog2(string LogData)
        {
            LogData = DateTime.Now.ToLongTimeString() + ":" + LogData;
            string LogName = "日志_Receive" + System.DateTime.Now.Year.ToString() + "-" + System.DateTime.Now.Month.ToString() + "-" + System.DateTime.Now.Day.ToString() + ".log";
            string filename = path + "\\" + LogName;
            FileStream fs = new FileStream(filename, FileMode.OpenOrCreate);
            fs.Seek(0, SeekOrigin.End);
            byte[] _data = new UTF8Encoding().GetBytes(LogData + "\r\n");
            fs.Write(_data, 0, _data.Length);
            fs.Flush();
            fs.Close();

        }
        /// <summary>
        /// 删除指定目录下的指定后缀名的文件
        /// </summary>
        /// <param name="directory">要删除的文件所在的目录，是绝对目录，如d:\temp</param>
        /// <param name="masks">要删除的文件的后缀名的一个数组，比如masks中包含了.cs,.vb,.c这三个元素</param>
        /// <param name="searchSubdirectories">表示是否需要递归删除，即是否也要删除子目录中相应的文件</param>
        /// <param name="ignoreHidden">表示是否忽略隐藏文件</param>
        /// /// <param name="deletedFileCount">表示总共删除的文件数</param>
        public static void DeleteFiles(string directory, string[] masks, bool searchSubdirectories, bool ignoreHidden, int delDay, ref int deletedFileCount)
        {
            //先删除当前目录下指定后缀名的所有文件
            foreach (string file in Directory.GetFiles(directory, "*.*"))
            {
                if (!(ignoreHidden && (File.GetAttributes(file) & FileAttributes.Hidden) == FileAttributes.Hidden))
                {
                    foreach (string mask in masks)
                    {
                        if (Path.GetExtension(file) == mask)
                        {
                            FileInfo _FileInfo = new FileInfo(file);
                            if (_FileInfo.LastWriteTime < DateTime.Now.Date.AddDays(-1 * delDay))
                            {
                                _FileInfo.Delete();
                                deletedFileCount++;
                            }
                        }
                    }
                }
            }
            //如果需要对子目录进行处理，则对子目录也进行递归操作
            if (searchSubdirectories)
            {
                string[] childDirectories = Directory.GetDirectories(directory);
                foreach (string dir in childDirectories)
                {
                    if (!(ignoreHidden && (File.GetAttributes(dir) & FileAttributes.Hidden) == FileAttributes.Hidden))
                    {
                        DeleteFiles(dir, masks, searchSubdirectories, ignoreHidden, delDay, ref deletedFileCount);
                    }
                }
            }
        }
    }
}