import com.tinkerforge.IPConnection;

import java.util.Arrays;

import com.tinkerforge.BrickletNFCRFID;

public class ExampleScanForTags {
    private static final String HOST = "localhost";
    private static final int PORT = 4223;

    // Change XYZ to the UID of your NFC/RFID Bricklet
    private static final String UID = "fhfg";

    private static short currentTagType = 0;

    // Note: To make the example code cleaner we do not handle exceptions. Exceptions
    //       you might normally want to catch are described in the documentation
    public static void main(String args[]) throws Exception {
        IPConnection ipcon = new IPConnection(); // Create IP connection
        // Note: Declare nr as final, so the listener can access it
        final BrickletNFCRFID nr = new BrickletNFCRFID(UID, ipcon); // Create device object

        ipcon.connect(HOST, PORT); // Connect to brickd
        // Don't use device before ipcon is connected

        // Add state changed listener
        nr.addStateChangedListener(new BrickletNFCRFID.StateChangedListener() {
            public void stateChanged(short state, boolean idle) {
//				System.out.println(state);
                try {
                    /*if(idle) {
                        currentTagType = 0;
                        		//(short)((currentTagType + 1) % 3);
                        nr.requestTagID(currentTagType);
                       
                    }*/

                    if(state == BrickletNFCRFID.STATE_REQUEST_TAG_ID_READY) {
                        BrickletNFCRFID.TagID tagID = nr.getTagID();
                        String s = "Found tag of type " + tagID.tagType + 
                                   " with ID [" + Integer.toHexString(tagID.tid[0]);

                        for(int i = 1; i < tagID.tidLength; i++) {
                            s += " " + Integer.toHexString(tagID.tid[i]);
                        }

                        s += "]";
                        System.out.println(s);
                        //added code
                        short[] keys= {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
						
						nr.authenticateMifareClassicPage(5, (short) 0,keys);
						
                    }  
                    if(state == BrickletNFCRFID.STATE_AUTHENTICATING_MIFARE_CLASSIC_PAGE_READY) {
                    	System.out.println("Ready");
                    		nr.requestPage(5);
						
						
                    }
                    if(state == BrickletNFCRFID.STATE_REQUEST_PAGE_READY) {
                    	System.out.println("page ready");
                    	short[] data=nr.getPage();
						System.out.println(Arrays.toString(data));
                    }

                } catch(Exception e) {
                    System.out.println(e);
                }
            }
        });

        // Start scan loop
        nr.requestTagID(BrickletNFCRFID.TAG_TYPE_MIFARE_CLASSIC);

        System.out.println("Press key to exit"); System.in.read();
        ipcon.disconnect();
    }
}