using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;

namespace GummingCommon
{
    /// <summary>
    /// this is debug class,not used
    /// </summary>
    public class MonitorLog
    {

        private static StringBuilder logContent = new StringBuilder();
        /// <summary>
        /// 防止并发对象
        /// </summary>
        private static Object lockobj = new Object();

        private static DateTime lastTime = DateTime.Now;

        /// <summary>
        /// 
        /// </summary>
        /// <param name="exception"></param>
        /// <returns></returns>
        public static bool WriteLog(string log)
        {
            bool returnValue;
            double ticket = DateTime.Now.Subtract(lastTime).TotalMilliseconds;
            logContent.AppendLine(DateTime.Now.ToString("yyyy-MM-dd hh:mm:ss.fff") + " - " + ticket + " " + log);
            lastTime = DateTime.Now;
            returnValue = WriteLog();
            return returnValue;
        }

        /// <summary>
        /// 产生文件名
        /// </summary>
        /// <returns></returns>
        private static string GenerateFileName()
        {
            string path = AppDomain.CurrentDomain.BaseDirectory + @"log\debug\";
            if (!Directory.Exists(path))
            {
                Directory.CreateDirectory(path);
            }
            return path + "Monitor" + DateTime.Now.ToString("yyyy-MM-dd hh-mm-ss") + " " + System.Guid.NewGuid().ToString() + ".txt";
        }

        public static int maxFlushSize = 1000000;
        /// <summary>
        /// 记录监控日志
        /// </summary>
        /// <param name="logContext">日志内容</param>
        /// <returns></returns>
        public static bool WriteLog()
        {
            bool returnValue = true;

            lock (logContent) //防止并发
            {
                if (logContent.Length >= maxFlushSize)
                {
                    GC.Collect();//强制垃圾回收

                    int writtenSize = FlushLog(); //将监控日志写入文件
                    if (writtenSize > 0)
                    {
                        logContent.Clear();
                    }
                    else if (writtenSize == -1) //写入日志失败
                    {
                        returnValue = false;
                    }
                }
            }
            return returnValue;
        }


        public static int FlushLog()
        {
            int returnValue = -1;

            try
            {
                if (logContent.Length > 0)
                {
                    StreamWriter sw = File.CreateText(GenerateFileName());
                    returnValue = logContent.Length;
                    sw.Write(logContent.ToString(0, returnValue));
                    sw.Close();
                    logContent.Clear();
                }
            }
            catch
            {
                returnValue = -1;
            }

            return returnValue;
        }
    }
}