import javax.smartcardio.CardException;

import Pcsc.*;
import AcsCommon.*;

public class PICCClass {

	private PcscReader _pcscConnection;

	public PcscReader getPcscConnection() {
		return this._pcscConnection;
	}

	public void setPcscConnection(PcscReader pcscConnection) {
		this._pcscConnection = pcscConnection;
	}

	public String getErrorMessage(byte[] sw1sw2) {
		if (sw1sw2.length != 2)
			return "Unknown Status Word (statusWord)";
		else if (sw1sw2[0] == (byte) 0x6A && sw1sw2[1] == (byte) 0x81)
			return "The function is not supported.";
		else if (sw1sw2[0] == (byte) 0x63 && sw1sw2[1] == (byte) 0x00)
			return "The operation failed.";
		else
			return "Unknown Status Word (statusWord)";
	}

	public PICCClass(PcscReader pcscConnection) {
		_pcscConnection = pcscConnection;
	}

	public byte[] getData(byte uIso14443A) throws Exception {
		if (_pcscConnection == null)
			throw new Exception("PCSC Connection is not yet established");

		Apdu apdu = new Apdu();
		apdu.setCommand(new byte[] { (byte) 0xFF, (byte) 0xCA, uIso14443A, (byte) 0x00, (byte) 0x00 });
		apdu.setLengthExpected(255);

		_pcscConnection.sendApduCommand(apdu);

		if (apdu.swEqualTo(new byte[] { (byte) 0x90, 0x00 }) == false)
			throw new CardException(getErrorMessage(apdu.getStatusWord()));

		return apdu.getReceiveData();
	}

	public byte[] sendCommand(int iCaseType, byte uCla, byte uIns, byte uP1, byte uP2, byte uLc, byte uLe, byte[] uData)
			throws Exception {
		if (_pcscConnection == null)
			throw new Exception("PCSC Connection is not yet established");

		Apdu apdu = new Apdu();

		switch (iCaseType) {
		case 0:
		case 2:
		case 3:
			apdu.setCommand(new byte[] { uCla, uIns, uP1, uP2, uLc });
			break;

		case 1:
			apdu.setCommand(new byte[] { uCla, uIns, uP1, uP2, uLe });
			break;

		default:
			apdu.setCommand(new byte[] { uCla, uIns, uP1, uP2, uLc });
			break;
		}

		apdu.setSendData(uData);
		apdu.setLengthExpected(uLe);

		_pcscConnection.sendApduCommand(apdu);

		if (!apdu.swEqualTo(new byte[] { (byte) 0x90, 0x00 }))
			throw new CardException(getErrorMessage(apdu.getStatusWord()));

		return apdu.getReceiveData();
	}
}