/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 org.apache.activemq.artemis.utils;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.lang.invoke.MethodHandles;
import org.junit.Test;

import java.util.HashMap;
import java.util.Map;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNotEquals;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;

public class DefaultSensitiveStringCodecTest {

   private static final Logger logger = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass());

   @Test
   public void testDefaultAlgorithm() throws Exception {
      SensitiveDataCodec<String> codec = PasswordMaskingUtil.getDefaultCodec();
      assertTrue(codec instanceof DefaultSensitiveStringCodec);
   }

   @Test
   public void testOnewayAlgorithm() throws Exception {
      testAlgorithm(DefaultSensitiveStringCodec.ONE_WAY);
   }

   @Test
   public void testTwowayAlgorithm() throws Exception {
      testAlgorithm(DefaultSensitiveStringCodec.TWO_WAY);
   }

   private void testAlgorithm(String algorithm) throws Exception {
      DefaultSensitiveStringCodec codec = getDefaultSensitiveStringCodec(algorithm);

      String plainText = "some_password";
      String maskedText = codec.encode(plainText);
      logger.debug("encoded value: {}", maskedText);

      if (algorithm.equals(DefaultSensitiveStringCodec.ONE_WAY)) {
         //one way can't decode
         try {
            codec.decode(maskedText);
            fail("one way algorithm can't decode");
         } catch (IllegalArgumentException expected) {
         }
      } else {
         String decoded = codec.decode(maskedText);
         logger.debug("encoded value: {}", maskedText);

         assertEquals("decoded result not match: " + decoded, decoded, plainText);
      }

      assertTrue(codec.verify(plainText.toCharArray(), maskedText));

      String otherPassword = "some_other_password";
      assertFalse(codec.verify(otherPassword.toCharArray(), maskedText));
   }

   @Test
   public void testInitFromEnvVar() throws Exception {
      final String someString = "bla";
      DefaultSensitiveStringCodec codecFromEnvVarConfig = new DefaultSensitiveStringCodec() {
         @Override
         public String getFromEnv(String v) {
            if (v.contains("_") && !v.contains(".")) {
               return someString;
            }
            return null;
         }
      };
      Map<String, String> params = new HashMap<>();
      codecFromEnvVarConfig.init(params);
      String blaVersion = codecFromEnvVarConfig.encode(someString);
      assertNotEquals(blaVersion,  getDefaultSensitiveStringCodec(DefaultSensitiveStringCodec.TWO_WAY).encode(someString));
   }

   @Test
   public void testCompareWithOnewayAlgorithm() throws Exception {
      testCompareWithAlgorithm(DefaultSensitiveStringCodec.ONE_WAY);
   }

   @Test
   public void testCompareWithTwowayAlgorithm() throws Exception {
      testCompareWithAlgorithm(DefaultSensitiveStringCodec.TWO_WAY);
   }

   private void testCompareWithAlgorithm(String algorithm) throws Exception {
      DefaultSensitiveStringCodec codec = getDefaultSensitiveStringCodec(algorithm);

      String plainText = "some_password";
      String maskedText = codec.encode(plainText);
      logger.debug("encoded value: {}", maskedText);

      assertTrue(codec.verify(plainText.toCharArray(), maskedText));

      String otherPassword = "some_other_password";
      assertFalse(codec.verify(otherPassword.toCharArray(), maskedText));
   }

   private DefaultSensitiveStringCodec getDefaultSensitiveStringCodec(String algorithm) throws Exception {
      DefaultSensitiveStringCodec codec = new DefaultSensitiveStringCodec();
      Map<String, String> params = new HashMap<>();
      params.put(DefaultSensitiveStringCodec.ALGORITHM, algorithm);
      codec.init(params);

      return codec;
   }
}
