using System;
using System.IO;
using UnityEngine;

//namespace ZTools
//{
public class FileLogger /*: MonoBehaviour*/
{
    private StreamWriter fileWriter;

    private string filename = "";
    private string filePath = "";

    private static string CurrentDay { get { return DateTime.Now.ToString("yyyyMMdd"); } }
    private string CurrentLogDay = "";
    private string PreSavePath;
    /// <summary>
    /// 开始打印
    /// </summary>
    /// <param name="logfile"></param>
    public FileLogger()
    {
        filename = ZLog.LogFileName;
        filePath = ZLog.LogPath.TrimEnd('/') + "/";
        StartNewFile();
        DeleteOldFile();
        CurrentLogDay = CurrentDay;
        this.Write("*********************************************************\nSystem Start at " + DateTime.Now.ToString("HH:mm:ss") + "\n*********************************************************\n");
    }
    /// <summary>
    /// 新建文件
    /// </summary>
    private void StartNewFile()
    {
        if (fileWriter != null)
        {
            fileWriter.Close();
            fileWriter.Dispose();
        }

        fileWriter = null;

        if (!Directory.Exists(filePath))
        {
            Directory.CreateDirectory(filePath);
        }
        fileWriter = File.AppendText(filePath + string.Format(this.filename, DateTime.Now));
    }

    public void Write(string content)
    {
        System.Globalization.CultureInfo.CurrentCulture.ClearCachedData();
        if (CurrentLogDay != CurrentDay)
        {
            this.filename = ZLog.LogFileName;
            StartNewFile();
            DeleteOldFile();
            CurrentLogDay = CurrentDay;
        }

        if (fileWriter != null && fileWriter.BaseStream != null && fileWriter.BaseStream.CanWrite)
            fileWriter.WriteLine(content);
    }
    void DeleteOldFile()
    {
        string[] fileList = Directory.GetFiles(filePath);
        if (fileList.Length > ZLog.SaveDays)
        {
            PreSavePath = filePath + string.Format(this.filename, DateTime.Now.AddDays(-ZLog.SaveDays + 1));
            for (int i = 0; i < fileList.Length; i++)
            {
                if (string.Compare(PreSavePath, fileList[i]) == 1)
                {
                    File.Delete(fileList[i]);
                }
            }
        }
    }
    public void OnDestroy()
    {
        if (fileWriter == null)
            return;

        this.Write("*********************************************************\nSystem Shutdown at " + DateTime.Now.ToString("HH:mm:ss") + "\n*********************************************************\n");

        fileWriter.Flush();
        fileWriter.Close();
        fileWriter = null;
    }
}
//}