/*
 * The contents of this file are subject to the terms of the Common Development and
 * Distribution License (the License). You may not use this file except in compliance with the
 * License.
 *
 * You can obtain a copy of the License at legal/CDDLv1.0.txt. See the License for the
 * specific language governing permission and limitations under the License.
 *
 * When distributing Covered Software, include this CDDL Header Notice in each file and include
 * the License file at legal/CDDLv1.0.txt. If applicable, add the following below the CDDL
 * Header, with the fields enclosed by brackets [] replaced by your own identifying
 * information: "Portions Copyright [year] [name of copyright owner]".
 *
 * Copyright 2006-2008 Sun Microsystems, Inc.
 * Portions Copyright 2014-2016 ForgeRock AS.
 */
package org.opends.server.extensions;



import java.util.Set;

import org.forgerock.opendj.server.config.server.PasswordValidatorCfg;
import org.opends.server.api.PasswordValidator;
import org.opends.server.types.*;
import org.forgerock.opendj.ldap.ByteString;
import org.forgerock.i18n.LocalizableMessageBuilder;


/**
 * This class provides a very simple password validator that can be used for
 * testing purposes.  It provides the ability to inspect the arguments provided
 * to the password validator, as well as to manipulate the result that it will
 * return.
 */
public class TestPasswordValidator
       extends PasswordValidator<PasswordValidatorCfg>
{
  /**
   * The singleton instance of this test password validator.
   */
  private static TestPasswordValidator instance;



  /** The next value to return from the passwordIsAcceptable method. */
  private boolean nextReturnValue;

  /** The last new password provided to the passwordIsAcceptable method. */
  private ByteString lastNewPassword;

  /** The last user entry provided to the passwordIsAcceptable method. */
  private Entry lastUserEntry;

  /** The last operation provided to the passwordIsAcceptable method. */
  private Operation lastOperation;

  /**
   * The last set of current passwords provided to the passwordIsAcceptable method.
   */
  private Set<ByteString> lastCurrentPasswords;

  /**
   * The next invalid reason that should be used in the passwordIsAcceptable method.
   */
  private String nextInvalidReason;



  /**
   * Creates a new instance of this password validator.
   */
  public TestPasswordValidator()
  {
    super();
  }



  /** {@inheritDoc} */
  @Override
  public void initializePasswordValidator(
                   PasswordValidatorCfg configuration)
         throws InitializationException
  {
    instance = this;

    lastNewPassword      = null;
    lastCurrentPasswords = null;
    lastOperation        = null;
    lastUserEntry        = null;
    nextReturnValue      = true;
    nextInvalidReason    = null;
  }



  /** {@inheritDoc} */
  @Override
  public boolean passwordIsAcceptable(ByteString newPassword,
                                      Set<ByteString> currentPasswords,
                                      Operation operation, Entry userEntry,
                                      LocalizableMessageBuilder invalidReason)
  {
    lastNewPassword      = newPassword;
    lastCurrentPasswords = currentPasswords;
    lastOperation        = operation;
    lastUserEntry        = userEntry;

    if (nextInvalidReason != null)
    {
      invalidReason.append(nextInvalidReason);
    }

    return nextReturnValue;
  }



  /**
   * Retrieves an instance of this test password validator.
   *
   * @return  An instance of this test password validator, or <CODE>null</CODE>
   *          if no instance has been created.
   */
  public static TestPasswordValidator getInstance()
  {
    return instance;
  }



  /**
   * Clears the instance after the tests so that it's memory can be reclaimed.
   * This can actually be quite a bit of memory since it references the
   * Schema, ConfigEntryS, etc
   */
  public static void clearInstanceAfterTests()
  {
    instance = null;
  }



  /**
   * Retrieves the last <CODE>newPassword</CODE> value provided to the
   * <CODE>passwordIsAcceptable</CODE> method.
   *
   * @return  The last <CODE>newPassword</CODE> value provided to the
   *          <CODE>passwordIsAcceptable</CODE> method.
   */
  public static ByteString getLastNewPassword()
  {
    return instance.lastNewPassword;
  }



  /**
   * Retrieves the last <CODE>currentPasswords</CODE> value provided to the
   * <CODE>passwordIsAcceptable</CODE> method.
   *
   * @return  The last <CODE>currentPasswords</CODE> value provided to the
   *          <CODE>passwordIsAcceptable</CODE> method.
   */
  public static Set<ByteString> getLastCurrentPasswords()
  {
    return instance.lastCurrentPasswords;
  }



  /**
   * Retrieves the last <CODE>operation</CODE> value provided to the
   * <CODE>passwordIsAcceptable</CODE> method.
   *
   * @return  The last <CODE>operation</CODE> value provided to the
   *          <CODE>passwordIsAcceptable</CODE> method.
   */
  public static Operation getLastOperation()
  {
    return instance.lastOperation;
  }



  /**
   * Retrieves the last <CODE>userEntry</CODE> value provided to the
   * <CODE>passwordIsAcceptable</CODE> method.
   *
   * @return  The last <CODE>userEntry</CODE> value provided to the
   *          <CODE>passwordIsAcceptable</CODE> method.
   */
  public static Entry getLastUserEntry()
  {
    return instance.lastUserEntry;
  }



  /**
   * Sets the next value to return from the <CODE>passwordIsAcceptable</CODE>
   * method.
   *
   * @param  nextReturnValue  The next value to return from the
   *                          <CODE>passwordIsAcceptable</CODE> method.
   */
  public static void setNextReturnValue(boolean nextReturnValue)
  {
    instance.nextReturnValue = nextReturnValue;
  }



  /**
   * Sets the next string to append to the <CODE>invalidReason</CODE> buffer in
   * the <CODE>passwordIsAcceptable</CODE> method.
   *
   * @param  nextReturnValue  The next string to append to the
   *                          <CODE>invalidReason</CODE> buffer in the
   *                          <CODE>passwordIsAcceptable</CODE> method.
   */
  public static void setNextInvalidReason(String nextInvalidReason)
  {
    instance.nextInvalidReason = nextInvalidReason;
  }
}