/*
 * 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.cookie;

import com.fasterxml.jackson.databind.ObjectMapper;
import io.dropwizard.jackson.Jackson;
import java.time.Clock;
import java.time.Instant;
import java.time.ZoneId;
import java.time.ZonedDateTime;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import keywhiz.FakeRandom;
import keywhiz.KeywhizService;
import keywhiz.auth.User;
import org.junit.Before;
import org.junit.Test;

import static java.nio.charset.StandardCharsets.UTF_8;
import static org.assertj.core.api.Assertions.assertThat;

public class AuthenticatedEncryptedCookieFactoryTest {
  private static final ObjectMapper MAPPER =
      KeywhizService.customizeObjectMapper(Jackson.newObjectMapper());
  private static final GCMEncryptor ENCRYPTOR =
      new GCMEncryptor("TESTKEYOF16BYTES".getBytes(UTF_8), FakeRandom.create());
  private static final User USER = User.named("User");

  Clock clock = Clock.fixed(Instant.now(), ZoneId.of("UTC"));
  AuthenticatedEncryptedCookieFactory cookieFactory;
  String validCookie;
  String expiredCookie;

  @Before public void setUp() {
    CookieConfig config = new CookieConfig();
    config.setName("session");

    cookieFactory = new AuthenticatedEncryptedCookieFactory(clock, MAPPER, ENCRYPTOR, config);
    validCookie = cookieFactory.getSessionCookie(USER, ZonedDateTime.now(clock)).toString();
    expiredCookie = cookieFactory.getExpiredSessionCookie().toString();
  }

  @Test public void expiredCookieMatchesValidCookieExceptContent() {
    Matcher matcher = Pattern.compile("(.*session=)[^;]+(;.*)").matcher(validCookie);
    assertThat(matcher.find()).isTrue();

    String withoutSession = matcher.replaceFirst("$1expired$2");
    assertThat(withoutSession).isEqualTo(expiredCookie);
  }
}