/*
    * 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
    *
    *      https://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.commons.net.time;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  import static org.junit.jupiter.api.Assertions.fail;
  
  import java.io.IOException;
  import java.net.InetAddress;
  import java.util.Calendar;
  import java.util.TimeZone;
  
  import org.junit.jupiter.api.Test;
  
  class TimeTCPClientTest {
      private TimeTestSimpleServer server1;
  
      private int _port = 3333; // default test port
  
      protected void closeConnections() {
          try {
              server1.stop();
              Thread.sleep(1000);
          } catch (final Exception e) {
              // ignored
          }
      }
  
      protected void openConnections() throws Exception {
          try {
              server1 = new TimeTestSimpleServer(_port);
              server1.connect();
          } catch (final IOException ioe) {
              // try again on another port
              _port = 4000;
              server1 = new TimeTestSimpleServer(_port);
              server1.connect();
          }
          server1.start();
      }
  
      /**
       * Tests the times retrieved via the Time protocol implementation.
       */
      @Test
      void testCompareTimes() throws Exception {
          openConnections();
  
          final long time;
          final long time2;
          final long clientTime;
          final long clientTime2;
          final TimeTCPClient client = new TimeTCPClient();
          try {
              // Not sure why code used to use getLocalHost.
              final InetAddress localHost = InetAddress.getByName("localhost"); // WAS InetAddress.getLocalHost();
              try {
                  // We want to timeout if a response takes longer than 60 seconds
                  client.setDefaultTimeout(60000);
                  client.connect(localHost, _port);
                  clientTime = client.getDate().getTime();
                  time = System.currentTimeMillis();
              } catch (final IOException e) { // catch the first connect error; assume second will work if this does
                  fail("IOError <" + e + "> trying to connect to " + localHost + " " + _port);
                  throw e;
              } finally {
                  if (client.isConnected()) {
                      client.disconnect();
                  }
              }
  
              try {
                  // We want to timeout if a response takes longer than 60 seconds
                  client.setDefaultTimeout(60000);
                  client.connect(localHost, _port);
                  clientTime2 = (client.getTime() - TimeTCPClient.SECONDS_1900_TO_1970) * 1000L;
                  time2 = System.currentTimeMillis();
              } finally {
                  if (client.isConnected()) {
                      client.disconnect();
                  }
              }
          } finally {
              closeConnections();
         }
 
         // current time shouldn't differ from time reported via network by 5 seconds
         assertTrue(Math.abs(time - clientTime) < 5000);
         assertTrue(Math.abs(time2 - clientTime2) < 5000);
     }
 
     /**
      * Tests the constant basetime used by TimeClient against tha computed from Calendar class.
      */
     @Test
     void testInitial() {
         final TimeZone utcZone = TimeZone.getTimeZone("UTC");
         final Calendar calendar = Calendar.getInstance(utcZone);
         calendar.set(1900, Calendar.JANUARY, 1, 0, 0, 0);
         calendar.set(Calendar.MILLISECOND, 0);
         final long baseTime = calendar.getTime().getTime() / 1000L;
 
         assertEquals(-TimeTCPClient.SECONDS_1900_TO_1970, baseTime);
     }
 }