package dk.daoas.adressevedligehold.tasks;

import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.logging.Level;

import org.apache.commons.lang3.exception.ExceptionUtils;


public class TaskLogger {
	
	private StringBuilder buffer = new StringBuilder(32*1024);//Reserve 32KB
	private SimpleDateFormat format = new SimpleDateFormat("HH:mm:ss.SSS");
	
	
	
	public String getBuffer() {
		synchronized(buffer) {
			return buffer.toString();
		}
	}
	
	public void reset() {
		synchronized(buffer) {
			buffer.setLength(0);
		}
	}
	
	public void log(Level lvl, String msg) {
		log("[" + lvl.toString() + "] " + msg);
	}
	
	public void log(Level lvl, String msg, Exception e) {
		log("[" + lvl.toString() + "] " + msg + "\n" + ExceptionUtils.getStackTrace(e) );
	}
	
	public void warning(String msg) {
		log(Level.WARNING, msg);
	}
	
	public void warning(String msg, Exception e) {
		log(Level.WARNING, msg, e);
	}
	
	public void info(String msg) {
		log(Level.INFO, msg);
	}
	
	public void fine(String msg) {
		log(Level.FINE, msg);
	}
	
	private void log(String msg) {
		String time = getTimeString();
		String line = "[" + time + "] " + msg + "\n";
		
		System.out.println(line);
		
		synchronized(buffer) {
			buffer.append(line);
		}
	}
	
	private String getTimeString() {
		return format.format( new Date() );
	}
	
	
	/* *******************************************************
	 * Singleton
	 */
	private static TaskLogger instance = null;
	private TaskLogger() {		
	}
	
	public static TaskLogger getInstance() {
		if (instance == null) {
			instance = new TaskLogger();
		}
		
		return instance;
	}
	
}