package com.hjx.personalcenter.util;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;

public class LogUtil
{
	private static com.hjx.personalcenter.util.LogUtil _lg;
	//single
	public static com.hjx.personalcenter.util.LogUtil Instance(){
		if(_lg == null){
			_lg = new com.hjx.personalcenter.util.LogUtil();
		}
		return _lg;
	}

	//日志保存的数量 ,默认保存最近10天的日志
	public int logSaveNum=10;

	/**插入日志*/
	public void WriteLog(String msg){
		if(LOG_SWITCH){
			System.out.println("插入日子的信息：" + msg);
			File file = checkLogFileIsExist();
			if(file == null)
				return;
			FileOutputStream fos = null;
			try
			{
				fos = new FileOutputStream(file, true);
				fos.write((new Date().toLocaleString() + "	" + msg).getBytes("gbk"));
				fos.write("\r\n".getBytes("gbk"));
			}
			catch (FileNotFoundException e)
			{
				e.printStackTrace();
			}
			catch (IOException e)
			{
				e.printStackTrace();
			}
			finally{
				try
				{
					if(fos != null){
						fos.close();
						fos = null;
					}
				}
				catch (IOException e)
				{
					e.printStackTrace();
				}
				fos = null;
				file = null;
			}
		}
	}
	/**
	 * 打印异常堆栈信息
	 * @param e
	 * @return
	 */
	public void WriteStackTrace(Throwable e){
		if(e != null){
			//StringWriter sw = new StringWriter();
			//PrintWriter pw = new PrintWriter(sw);
			//e.printStackTrace(pw);
			//return sw.toString();
			WriteLog(e.getStackTrace().toString());
		}
		//return "";
	}




	private LogUtil()
	{
		CheckLogDele();

	}

	private void CheckLogDele()
	{
		//todo 扫描sd卡下面的日志文件，删除超过logSaveNum的日志

	}

	/**日志保存路径*/
	private static final String LOG_SAVE_PATH = "/sdcard/Log/"; //sd卡上的日志文件目录
	/**日志开关*/
	private static final boolean LOG_SWITCH = true;

	/**检查日志文件是否存在*/
	private File checkLogFileIsExist(){
		//if(!MemorySpaceManager.isSDExist()){  //sd 卡是否存在
		//	return null;
		//}
		File file = new File(LOG_SAVE_PATH);
		if(!file.exists()){
			file.mkdirs();
		}
		SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
		String dateStr = sdf.format(new Date());
		file = new File(LOG_SAVE_PATH + dateStr + ".txt");
		if(!isLogExist(file)){
			try
			{
				file.createNewFile();
			}
			catch (IOException e)
			{
				e.printStackTrace();
			}
		}
		sdf = null;
		return file;
	}

	/**
	 * 检查当天日志文件是否存在
	 * @param file
	 * @return
	 */
	private boolean isLogExist(File file){
		File tempFile = new File(LOG_SAVE_PATH);
		File[] files = tempFile.listFiles();
		if(files!=null){
			for(int i = 0; i < files.length; i++){
				if(files[0].getName().trim().equalsIgnoreCase(file.getName())){
					return true;
				}
			}
		}
		return false;
	}

}