/**
    * Copyright 2010-2014 The Kuali Foundation
    *
    * Licensed under the Educational Community 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.opensource.org/licenses/ecl2.php
    *
   * 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 org.kuali.common.util.enc;
  
  import java.util.List;
  import java.util.Properties;
  import java.util.SortedSet;
  
  import org.jasypt.util.text.TextEncryptor;
  import org.kuali.common.util.Assert;
  import org.kuali.common.util.PropertyUtils;
  
  import com.google.common.collect.Sets;
  
  /**
   * @deprecated
   */
  @Deprecated
  public final class DefaultEncryptionService implements EncryptionService {
  
  	private final TextEncryptor encryptor;
  
  	public DefaultEncryptionService(TextEncryptor encryptor) {
  		Assert.noNulls(encryptor);
  		this.encryptor = encryptor;
  	}
  
  	@Override
  	public String encrypt(String text) {
  		if (EncUtils.isEncrypted(text)) {
  			return text; // It's already encrypted, just return it
  		}
  		Assert.notEncrypted(text);
  		String encryptedText = encryptor.encrypt(text);
  		return EncUtils.wrap(encryptedText);
  	}
  
  	@Override
  	public String decrypt(String text) {
  		if (!EncUtils.isEncrypted(text)) {
  			return text; // It's not encrypted, just return it
  		}
  		Assert.encrypted(text);
  		String unwrapped = EncUtils.unwrap(text);
  		return encryptor.decrypt(unwrapped);
  	}
  
  	/**
  	 * Decrypt any encrypted property values.
  	 */
  	@Override
  	public void decrypt(Properties properties) {
  		List<String> keys = PropertyUtils.getEncryptedKeys(properties);
  		for (String key : keys) {
  			String encrypted = properties.getProperty(key);
  			String decrypted = decrypt(encrypted);
  			properties.setProperty(key, decrypted);
  		}
  	}
  
  	/**
  	 * Encrypt any property values that are not already encrypted.
  	 */
  	@Override
  	public void encrypt(Properties properties) {
  		SortedSet<String> allKeys = Sets.newTreeSet(properties.stringPropertyNames());
  		SortedSet<String> encKeys = Sets.newTreeSet(PropertyUtils.getEncryptedKeys(properties));
  		SortedSet<String> keys = Sets.newTreeSet(Sets.difference(allKeys, encKeys));
  		for (String key : keys) {
  			String plaintext = properties.getProperty(key);
  			String encrypted = encrypt(plaintext);
  			properties.setProperty(key, encrypted);
  		}
  	}
  
  	public TextEncryptor getEncryptor() {
  		return encryptor;
  	}
  
  }