/**
 * This file is part of aion-emu <aion-emu.com>.
 *
 *  aion-emu is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  aion-emu is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with aion-emu.  If not, see <http://www.gnu.org/licenses/>.
 */
package com.aionemu.gameserver.utils;

import java.nio.ByteBuffer;

/**
 * @author -Nemesiss-
 * 
 */
public class Util
{
	/**
	 * @param s
	 */
	public static void printSection(String s)
	{
		s = "-[ " + s + " ]";
		
		while (s.length() < 79)
			s = "=" + s;
		
		System.out.println(s);
	}
	
	/**
	 * Convert data from given ByteBuffer to hex
	 * 
	 * @param data
	 * @return hex
	 */
	public static String toHex(ByteBuffer data)
	{
		StringBuilder result = new StringBuilder();
		int counter = 0;
		int b;
		while(data.hasRemaining())
		{
			if(counter % 16 == 0)
				result.append(String.format("%04X: ", counter));

			b = data.get() & 0xff;
			result.append(String.format("%02X ", b));

			counter++;
			if(counter % 16 == 0)
			{
				result.append("  ");
				toText(data, result, 16);
				result.append("\n");
			}
		}
		int rest = counter % 16;
		if(rest > 0)
		{
			for(int i = 0; i < 17 - rest; i++)
			{
				result.append("   ");
			}
			toText(data, result, rest);
		}
		return result.toString();
	}

	/**
	 * Gets last <tt>cnt</tt> read bytes from the <tt>data</tt> buffer and puts into <tt>result</tt> buffer in special
	 * format:
	 * <ul>
	 * <li>if byte represents char from partition 0x1F to 0x80 (which are normal ascii chars) then it's put into buffer
	 * as it is</li>
	 * <li>otherwise dot is put into buffer</li>
	 * </ul>
	 * 
	 * @param data
	 * @param result
	 * @param cnt
	 */
	private static void toText(ByteBuffer data, StringBuilder result, int cnt)
	{
		int charPos = data.position() - cnt;
		for(int a = 0; a < cnt; a++)
		{
			int c = data.get(charPos++);
			if(c > 0x1f && c < 0x80)
				result.append((char) c);
			else
				result.append('.');
		}
	}

	/**
	 * Converts name to valid pattern For example : "atracer" -> "Atracer"
	 * 
	 * @param name
	 * @return String
	 */
	public static String convertName(String name)
	{
		if(!name.isEmpty())
			return name.substring(0, 1).toUpperCase() + name.toLowerCase().substring(1);
		else
			return "";
	}
}