package main.cn.edu.nju.software.sd.cll;
import java.util.Date;
import java.text.SimpleDateFormat;
import java.util.*;

public class Logger{
	private String name;
	private Level loggerlevel;
	private Format logformat;
    private ArrayList<Handler> handlers = new ArrayList<Handler>();
    
    /**默認的配置用于當在配置文件中沒有父logger的配置的時候用來配置父logger，*/
    public final static Level defaultLevel = Level.TRACE;
    public final static Format defaultFormat = new Format("%n-%e-%m");
    public final static Handler defaultHandler = new ConsoleHandler();
    
//	private boolean useParentConfiguration;
	private boolean useParentLevel;
	private boolean useParentDestination;
	private boolean useParentFormat;
	
//	private boolean isLoggable;
	private static LoggerManager logManager = LoggerManager.getLogManager();
	public static final Logger root = new Logger("　");
	
	/**構造方法*/
	public Logger(){}
	public Logger(String n)
	{
		name = n;
	}
	public static Logger getRootLogger()
	{
		return root;
	}
	/**兩種獲得logger的方法*/
	public static Logger getLogger(Class clazz) {
		String namestr = clazz.getName();
		Logger logger = logManager.getLogger(namestr);
		return logger;
	}
	
	public static Logger getLogger(String namestr) {
		Logger logger = logManager.getLogger(namestr);
		return logger;
	}
	
	/**logger的配置*/
	public void removeHandle(Handler handler)
	{
		
	}

	/**獲得logger的名字*/
	public String getName()
	{
		return name;
	}
	
	/**獲得和設置logger的level*/
	public Level getLevel()
	{
		return loggerlevel;
	}
	public void setLevel(Level l)
	{
		loggerlevel = l;
	}
/*	public void setLevel(int n)
	{
		Level le = new Level();
		le = le.toLevel(n);
        setLevel(le);
	}
	public void setLevel(String str)
	{
		Level le = new Level();
		le = le.toLevel(str);
		setLevel(le);
	}
	
	public void setLevel(Level l,boolean b)
	{
		loggerlevel = l;
		useParentLevel = b;
	}*/
	/**設置output destintion*/
	public void addHandler(Handler h)
	{
		if(h!=null)
		{
		    handlers.add(h);
		}
	}
/*	public void addHandler(Handler h,boolean b)
	{
		useParentDestination = b;
		if(!useParentDestination)
			handlers.add(h);
	}*/
	public ArrayList<Handler> getHandlers()
	{
		return handlers;
	}
	/**設置format*/
	public void setFormat(Format format)
	{
		logformat = format;
	}
/*	public void setFormat(Format f,boolean b)
	{
		useParentFormat = b;
		logformat = f;
	}*/
	public Format getFormat()
	{
		return logformat;
	}

	/**判斷和設置是否應用 父logger的配置 */
	public boolean getUseParentConfiguration()
	{
		return useParentConfiguration;
	}
	public void setUseParentConfiguration(boolean use)
	{
		useParentConfiguration = use;
	}
	/**判斷是否用父logger的level*/
	public boolean getUseParentLevel()
	{
		return useParentLevel;
	}
	public void setUseParentLevel(boolean useOrNot)
	{
		useParentLevel = useOrNot;
	}

	/**判斷是否使用父logger的output destination*/
	public boolean getUseParentDestination()
	{
		return useParentDestination;
	}
	public void setUseParentDestination(boolean useOrNot)
	{
		useParentDestination = useOrNot;
	}
	/**判斷是否使用父logger的format*/
	public boolean getUseParentFormat()
	{
		return useParentFormat;
	}
	public void setUseParentFormat(boolean useOrNot)
	{
		useParentFormat = useOrNot;
	}
	/**記錄并封裝信息,最后向目的地輸出信息*/
	public void log(Level level, String message) {
		Date d = new Date();
		SimpleDateFormat sd = new SimpleDateFormat("yyyy/MM/dd-HH:mm:ss");
		String date = sd.format(d);
		String logname = name;
		String result = null;
		StackTraceElement stack[] = (new Throwable()).getStackTrace();
		int i = stack.length-1;
		String callClass = stack[i].getClassName();
		String callee = stack[i].getMethodName();
		int lineno = stack[i].getLineNumber();
		LogRecord record = new LogRecord(logname,level,message,callClass,callee,lineno,date,0);
		boolean loggable = loggableOrNot(level);
		if(loggable)
		{
			Format formator = logformat;
			if(formator==null)
			{
				formator = logManager.getParentFormat(this);
			}
			result = formator.doFormat(record);
		}
		ArrayList<Handler> array = handlers;
		if(array.isEmpty())
		{
			array = logManager.getParentHandler(this);
		}
		for(int t=0;t<array.size();t++)
		{
			Handler handler = array.get(t);
			handler.publish(result);
		}
	}

	/**判斷是否可以log,如果當前logger的level沒有配置,則比較父logger的level */
	public boolean loggableOrNot(Level level)
	{
		boolean isLoggable;
		Level l = loggerlevel;
		if(l==null)
		{
			l = logManager.getParentLevel(this);
		}
		if(level.intlevel<l.intlevel)
			isLoggable = false;
		else 
			isLoggable = true;
		
		return isLoggable;
	}
}