/*******************************************************************************
 * This file is part of logisim-evolution.
 *
 *   logisim-evolution 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.
 *
 *   logisim-evolution 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 logisim-evolution.  If not, see <http://www.gnu.org/licenses/>.
 *
 *   Original code by Carl Burch (http://www.cburch.com), 2011.
 *   Subsequent modifications by :
 *     + Haute École Spécialisée Bernoise
 *       http://www.bfh.ch
 *     + Haute École du paysage, d'ingénierie et d'architecture de Genève
 *       http://hepia.hesge.ch/
 *     + Haute École d'Ingénierie et de Gestion du Canton de Vaud
 *       http://www.heig-vd.ch/
 *   The project is currently maintained by :
 *     + REDS Institute - HEIG-VD
 *       Yverdon-les-Bains, Switzerland
 *       http://reds.heig-vd.ch
 *******************************************************************************/
package com.hepia.logisim.chronodata;

import java.util.ArrayList;

import javax.swing.ImageIcon;

import com.cburch.logisim.util.Icons;

/*
 * Contains bus specific data
 * */
public class SignalDataBus extends SignalData {

	public static String[] signalFormat = { "binary", "hexadecimal", "octal",
			"signed", "unsigned" };
	private String format = "hexadecimal";
	private boolean expanded = false;

	public SignalDataBus(String name, ArrayList<String> data) {
		super(name, data);
	}

	public String getFormat() {
		return format;
	}

	public ImageIcon getIcon() {
		return (ImageIcon) Icons.getIcon("chronoBus.gif");
	}

	public String getSelectedValue() {
		return data.size() > 0 ? getValueInFormat(data.get(selectedValuePos))
				: "";
	}

	public String getValueInFormat(String binaryVal) {
		try {
			if (format.equals("binary"))
				return binaryVal;
			else if (format.equals("hexadecimal"))
				return toHexa(binaryVal);
			else if (format.equals("octal"))
				return toOctal(binaryVal);
			else if (format.equals("signed"))
				return toSigned(binaryVal);
			else if (format.equals("unsigned"))
				return toUnsigned(binaryVal);
			else
				return binaryVal;
		} catch (Exception e) {
			return binaryVal;
		}
	}

	public boolean isExpanded() {
		return expanded;
	}

	public void setExpanded(boolean val) {
		expanded = val;
	}

	public void setFormat(String format) {
		this.format = format;
	}

	private String toHexa(String bin) {
		int valInInt = Integer.parseInt(bin, 2);
		return Integer.toHexString(valInInt).toUpperCase();
	}

	private String toOctal(String bin) {
		int valInInt = Integer.parseInt(bin, 2);
		return Integer.toOctalString(valInInt).toUpperCase();
	}

	/*
	 * Return the Two's complements for negative number The size of 'bin' is
	 * used for the binary length
	 */
	private String toSigned(String bin) {
		// bin positive
		if (bin.charAt(0) == '0')
			return toUnsigned(bin);

		// two's complement
		int valInInt = Integer.parseInt(bin, 2);
		String ones = "";
		for (int i = 0; i < bin.length(); ++i)
			ones += "1";
		valInInt ^= Integer.parseInt(ones, 2);
		valInInt += 1;
		return Integer.toString(-valInInt);
	}

	private String toUnsigned(String bin) {
		int valInInt = Integer.parseInt(bin, 2);
		return Integer.toString(valInInt);
	}
}