/*
 * Copyright 2008 Federal Chancellery Austria and
 * Graz University of Technology
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package at.gv.egiz.smcc.pin.gui;

import at.gv.egiz.smcc.CancelledException;
import at.gv.egiz.smcc.PINSpec;

public class InvalidChangePINProvider extends DummyChangePINGUI implements ModifyPINGUI {

  int provided = 0;
  int numWrongTries = 0;
  char[] pin;
  char[] oldPin;

  /** emulate ChangePinProvider */
  public InvalidChangePINProvider(char[] oldPin, char[] newPin, int numWrongTries) {
    super();
    this.pin = newPin;
    this.oldPin = oldPin;
    this.numWrongTries = numWrongTries;
  }

  @Override
  public char[] provideCurrentPIN(PINSpec spec, int retries)
          throws CancelledException, InterruptedException {
    if (provided >= numWrongTries) {
      throw new CancelledException("Number of wrong tries reached: " + provided);
    } else {
      provided++;
      return oldPin;
    }
  }

  public int getProvided() {
    return provided;
  }

  @Override
  public char[] provideNewPIN(PINSpec spec) {
    return pin;
  }
}