/*
 * Copyright (c) 2017, Andreas Fagschlunger. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
 *   - 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 OWNER 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.
 */

package at.o2xfs.emv;

import at.o2xfs.common.Hex;
import at.o2xfs.log.Logger;
import at.o2xfs.log.LoggerFactory;

public final class TSI {

	private static final Logger LOG = LoggerFactory.getLogger(TSI.class);

	public static final int TSI_LENGTH = 2;

	private final byte[] tsi;

	public TSI(byte[] tsi) {
		if (tsi.length != TSI_LENGTH) {
			throw new IllegalArgumentException("Illegal TSI: "
					+ Hex.encode(tsi));
		}
		this.tsi = tsi;
	}

	void setBit(int index, int mask, String message) {
		final String method = "setBit(int, int)";
		if (LOG.isInfoEnabled()) {
			LOG.info(method, "TSI Byte " + (index + 1) + ": " + message);
		}
		tsi[index] |= mask;
	}

	public TSIByte1 getByte1() {
		return new TSIByte1(this);
	}
}