/*
 * Copyright (c) 2017 OnGres, Inc.
 * SPDX-License-Identifier: BSD-2-Clause
 */

package com.ongres.scram.common;

import static com.ongres.scram.common.RfcExampleSha1.AUTH_MESSAGE;
import static com.ongres.scram.common.RfcExampleSha1.PASSWORD;
import static com.ongres.scram.common.RfcExampleSha1.SERVER_FINAL_MESSAGE;
import static com.ongres.scram.common.RfcExampleSha1.SERVER_ITERATIONS;
import static com.ongres.scram.common.RfcExampleSha1.SERVER_SALT;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertFalse;
import static org.junit.jupiter.api.Assertions.assertThrows;
import static org.junit.jupiter.api.Assertions.assertTrue;

import java.util.Base64;

import com.ongres.scram.common.exception.ScramParseException;
import org.junit.jupiter.api.Test;

class ServerFinalMessageTest {
  @Test
  void validConstructor() {
    byte[] serverKey = ScramFunctions.serverKey(
        ScramMechanism.SCRAM_SHA_1,
        ScramFunctions.saltedPassword(ScramMechanism.SCRAM_SHA_1, StringPreparation.NO_PREPARATION,
            PASSWORD.toCharArray(),
            Base64.getDecoder().decode(SERVER_SALT),
            SERVER_ITERATIONS));
    ServerFinalMessage serverFinalMessage1 = new ServerFinalMessage(
        ScramFunctions.serverSignature(ScramMechanism.SCRAM_SHA_1, serverKey, AUTH_MESSAGE));
    assertEquals(SERVER_FINAL_MESSAGE, serverFinalMessage1.toString());
    assertFalse(serverFinalMessage1.isError());

    ServerFinalMessage serverFinalMessage2 =
        new ServerFinalMessage("unknown-user");
    assertEquals(ScramAttributes.ERROR.getChar() + "=unknown-user",
        serverFinalMessage2.toString());
    assertTrue(serverFinalMessage2.isError());
  }

  @Test
  void validParseFrom() throws ScramParseException {
    ServerFinalMessage serverFinalMessage1 = ServerFinalMessage.parseFrom(SERVER_FINAL_MESSAGE);
    assertEquals(SERVER_FINAL_MESSAGE, serverFinalMessage1.toString());
    assertFalse(serverFinalMessage1.isError());

    ServerFinalMessage serverFinalMessage2 =
        ServerFinalMessage.parseFrom("e=channel-binding-not-supported");
    assertEquals("e=channel-binding-not-supported", serverFinalMessage2.toString());
    assertTrue(serverFinalMessage2.isError());
    assertEquals("channel-binding-not-supported",
        serverFinalMessage2.getServerError());
  }

  @Test
  void invalidServerError() throws ScramParseException {
    assertThrows(IllegalArgumentException.class,
        () -> ServerFinalMessage.parseFrom("e=binding-et-supported"));
  }
}