package com.dt180g.laboration_3;

import java.io.IOException;
import java.util.logging.*;
import java.util.logging.FileHandler;
import java.util.logging.Handler;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 * Singleton class which contains a logger for logging
 * information about the game.
 */

public class HanoiLogger implements Constants {
    private static Logger logger;

    /**
     * Constructor made private.
     */
    private HanoiLogger() {}

    /**
     * Function to retrieve the logger.
     * Calls method to initialize the logger conforming to lazy initialization of a singleton class.
     * @return The logger instance.
     */
    public static Logger getLogger() {
        if(logger == null){
            initializeLogger();
        }
        return logger;
    }

    /**
     * Closes all the handlers of the logger.
     */
    public static void closeLogger() {
        for (Handler h : logger.getHandlers()) {
            h.close();
        }
    }

    /**
     * Initializer method for the logger.
     */
    private static void initializeLogger() {
        try {
            logger = Logger.getLogger(Logger.GLOBAL_LOGGER_NAME);
            FileHandler handler = new FileHandler(LOG_FILE_PATH);
            SimpleFormatter formatter = new SimpleFormatter() {
                @Override
                public synchronized String format(LogRecord logRecord) {
                    return String.format("%s%n", logRecord.getMessage());
                }
            };
            handler.setFormatter(formatter);
            logger.addHandler(handler);
        } catch (IOException ex) {
            logger.log(Level.SEVERE, ex.getMessage(), ex);
        } catch (SecurityException ex) {
            logger.log(Level.SEVERE, ex.getMessage(), ex);
        }
    }
}