/*
 * Copyright (C) 2015 Square, Inc.
 *
 * 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 keywhiz.auth.bcrypt;

import io.dropwizard.auth.basic.BasicCredentials;
import java.util.Optional;
import keywhiz.auth.User;
import keywhiz.service.daos.UserDAO;
import org.junit.Before;
import org.junit.Rule;
import org.junit.Test;
import org.mindrot.jbcrypt.BCrypt;
import org.mockito.Mock;
import org.mockito.junit.MockitoJUnit;
import org.mockito.junit.MockitoRule;

import static org.assertj.core.api.Assertions.assertThat;
import static org.mockito.Mockito.when;

public class BcryptAuthenticatorTest {

  BcryptAuthenticator bcryptAuthenticator;
  String hashedPass;

  @Rule public MockitoRule mockito = MockitoJUnit.rule();

  @Mock UserDAO userDAO;

  @Before
  public void setup() throws Exception {
    // set up a credential
    bcryptAuthenticator = new BcryptAuthenticator(userDAO);
    hashedPass = BCrypt.hashpw("validpass", BCrypt.gensalt());
  }

  @Test
  public void bcryptAuthenticatorCreatesUserOnSuccess() throws Exception {
    when(userDAO.getHashedPassword("sysadmin"))
        .thenReturn(Optional.of(hashedPass));

    User user = bcryptAuthenticator.authenticate(new BasicCredentials("sysadmin", "validpass"))
        .orElseThrow(RuntimeException::new);
    assertThat(user).isEqualTo(User.named("sysadmin"));
  }

  @Test
  public void bcryptAuthenticatorFailsForBadPassword() throws Exception {
    when(userDAO.getHashedPassword("sysadmin"))
        .thenReturn(Optional.of(hashedPass));

    Optional<User> missingUser =
        bcryptAuthenticator.authenticate(new BasicCredentials("sysadmin", "badpass"));
    assertThat(missingUser.isPresent()).isFalse();
  }

  @Test
  public void bcryptAuthenticatorFailsForBadUser() throws Exception {
    when(userDAO.getHashedPassword("invaliduser"))
        .thenReturn(Optional.empty());

    Optional<User> missingUser =
        bcryptAuthenticator.authenticate(new BasicCredentials("invaliduser", "validpass"));
    assertThat(missingUser.isPresent()).isFalse();
  }

  @Test
  public void bcryptAuthenticatorRejectsInvalidUsername() throws Exception {
    String crazyUsername = "sysadmin)`~!@#$%^&*()+=[]{}\\|;:'\",<>?/\r\n\t";
    Optional<User> missingUser =
        bcryptAuthenticator.authenticate(new BasicCredentials(crazyUsername, "validpass"));
    assertThat(missingUser.isPresent()).isFalse();
  }

}