/*-
    * #%L
    * prolobjectlink-jpi-jpl7
    * %%
    * Copyright (C) 2012 - 2019 Prolobjectlink Project
    * %%
    * Redistribution and use in source and binary forms, with or without
    * modification, are permitted provided that the following conditions are met:
    * 
   * 1. Redistributions of source code must retain the above copyright notice,
   *    this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright notice,
   *    this list of conditions and the following disclaimer in the documentation
   *    and/or other materials provided with the distribution.
   * 
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
   * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   * POSSIBILITY OF SUCH DAMAGE.
   * #L%
   */
  package io.github.prolobjectlink.prolog.jpl7;
  
  import java.text.SimpleDateFormat;
  import java.util.Date;
  import java.util.logging.Formatter;
  import java.util.logging.Level;
  import java.util.logging.LogRecord;
  
  import io.github.prolobjectlink.prolog.PrologFormatter;
  
  /**
   * 
   * @author Jose Zalacain
   * @since 1.0
   */
  final class JplFormatter extends Formatter implements PrologFormatter {
  
  	private static final String ERROR = "ERROR";
  	private static final String WARN = "WARN";
  	private static final String INFO = "INFO";
  	private static final String DEBUG = "DEBUG";
  	private static final String TRACE = "TRACE";
  
  	@Override
  	public String format(LogRecord record) {
  		StringBuilder buffer = new StringBuilder();
  
  		// retrieve record data
  		String levelString = "";
  		Level level = record.getLevel();
  		if (level.intValue() == Level.SEVERE.intValue()) {
  			levelString = ERROR;
  		} else if (level.intValue() == Level.WARNING.intValue()) {
  			levelString = WARN;
  		} else if (level.intValue() == Level.INFO.intValue()) {
  			levelString = INFO;
  		} else if (level.intValue() == Level.CONFIG.intValue()) {
  			levelString = DEBUG;
  		} else if (level.intValue() == Level.FINE.intValue()) {
  			levelString = DEBUG;
  		} else if (level.intValue() == Level.FINER.intValue()) {
  			levelString = DEBUG;
  		} else if (level.intValue() == Level.FINEST.intValue()) {
  			levelString = TRACE;
  		}
  
  		long millisecs = record.getMillis();
  		String name = record.getLoggerName();
  		String message = record.getMessage();
  		Throwable throwable = record.getThrown();
  		SimpleDateFormat f = new SimpleDateFormat("MMM-dd-yyyy HH:mm");
  		Date resultdate = new Date(millisecs);
  		String date = f.format(resultdate);
  
  		// create log line
  		buffer.append('[');
  		buffer.append(name);
  		buffer.append(']');
  		buffer.append(' ');
  		buffer.append(levelString);
  		buffer.append(' ');
  		buffer.append(date);
  		buffer.append(' ');
  		buffer.append(message);
  		if (throwable != null) {
  			buffer.append('\n');
  			buffer.append(throwable);
  			buffer.append('\n');
  			StackTraceElement[] s = throwable.getStackTrace();
  			for (StackTraceElement stackTraceElement : s) {
  				buffer.append(stackTraceElement);
 				buffer.append('\n');
 			}
 		}
 		buffer.append('\n');
 		return "" + buffer + "";
 	}
 
 }