package SmartCard;

import java.util.List;
import javax.smartcardio.ATR;
import javax.smartcardio.Card;
import javax.smartcardio.CardChannel;
import javax.smartcardio.CardException;
import javax.smartcardio.CardTerminal;
import javax.smartcardio.TerminalFactory;

/**
 *
 * @author Primiano Tucci - http://www.primianotucci.com/
 */
public class SmartCard {
    String currentCardATR;
    String currentCard;
    CardTerminal reader;
    Card card;
    CardChannel chan;
    
    public String connect(String iProto) throws CardException{
        card = reader.connect(iProto);
        ATR atr = card.getATR();
        
        currentCardATR = StringUtil.byteArrToString(atr.getBytes()," ");
        currentCard = CardList.lookupByAtr(atr.getBytes());
        chan = card.getBasicChannel();
        
        return currentCard;
            
    }
    
    public boolean isConnected(){
        return (card!=null);
    }
    
    public void disconnect() throws CardException{
        /*if(chan!=null){
            chan.close();
            chan=null;
        }*/
        if(card==null) return;
        card.disconnect(true);
        card=null;        
    }
    
    
    public CardChannel getChannel(){
        return chan;
    }
    
    public String setReader(Object iReaderRef) throws CardException{
        reader = objectToReader(iReaderRef);
        if(reader == null) return "Null Object ["+iReaderRef+"]";
        if(!reader.isCardPresent())
            return "No card present";
        
        return reader.getName();        
    }
    

    
    CardTerminal objectToReader(Object iRef){
        return TerminalFactory.getDefault().terminals().getTerminal(iRef.toString().substring(4));
    }
    
    public String[] listReaders() throws CardException{
        List<CardTerminal> tlist = TerminalFactory.getDefault().terminals().list();
        String[] outList = new String[tlist.size()];
        for(int i=0; i < tlist.size(); i++)
            outList[i] = (tlist.get(i).isCardPresent() ? "[x] " : "[ ] ") + tlist.get(i).getName();
        return outList;
    }
    
    
    
    
    public String getCurrentCardATR(){
        return currentCardATR;
    }
}