/**
 * 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.transport.failover;

import java.lang.reflect.Field;
import java.net.URI;
import java.util.Collection;

import org.junit.Test;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;

public class FailoverTransportUriHandlingTest {

   @Test
   public void testFailoverTransportAddWithInitialUnknown() throws Exception {
      FailoverTransport transport = new FailoverTransport();

      final String initialUri = "tcp://no.existing.hostname:61616";

      transport.add(false, initialUri);

      String[] uriArray = new String[]{"tcp://127.0.0.2:61616", "tcp://localhost:61616", "tcp://localhost:61617"};

      for (String uri : uriArray) {
         transport.add(false, uri);
      }

      Collection<URI> uris = getRegisteredUrlsFromPrivateField(transport);

      for (String uri : uriArray) {
         assertTrue("Collection should contain: " + uri, uris.contains(new URI(uri)));
      }
   }

   @Test
   public void testFailoverTransportAddWithInitialKnown() throws Exception {
      FailoverTransport transport = new FailoverTransport();

      final String initialUri = "tcp://localhost:61616";

      transport.add(false, initialUri);

      String[] uriArray = new String[]{"tcp://127.0.0.2:61616", "tcp://no.existing.hostname:61616", "tcp://localhost:61617"};

      for (String uri : uriArray) {
         transport.add(false, uri);
      }

      Collection<URI> uris = getRegisteredUrlsFromPrivateField(transport);

      for (String uri : uriArray) {
         assertTrue("Collection should contain: " + uri, uris.contains(new URI(uri)));
      }
   }

   @Test
   public void testFailoverTransportAddWithPreventsDups() throws Exception {
      FailoverTransport transport = new FailoverTransport();

      final String initialUri = "tcp://localhost:61616";

      transport.add(false, initialUri);

      String[] uriArray = new String[]{"tcp://127.0.0.2:61616", "tcp://localhost:61616", "tcp://no.existing.hostname:61616", "tcp://localhost:61617", "tcp://127.0.0.1:61616"};

      for (String uri : uriArray) {
         transport.add(false, uri);
      }

      Collection<URI> uris = getRegisteredUrlsFromPrivateField(transport);

      assertEquals(4, uris.size());

      // Ensure even the unknowns get checked.
      transport.add(false, "tcp://no.existing.hostname:61616");

      uris = getRegisteredUrlsFromPrivateField(transport);

      assertEquals(4, uris.size());
   }

   @Test
   public void testFailoverTransportAddArray() throws Exception {
      FailoverTransport transport = new FailoverTransport();

      final String initialUri = "tcp://no.existing.hostname:61616";

      transport.add(false, initialUri);

      URI[] uriArray = new URI[]{new URI("tcp://127.0.0.2:61616"), new URI("tcp://localhost:61616"), new URI("tcp://localhost:61617")};

      transport.add(false, uriArray);

      Collection<URI> uris = getRegisteredUrlsFromPrivateField(transport);

      for (URI uri : uriArray) {
         assertTrue("Collection should contain: " + uri, uris.contains(uri));
      }

      assertEquals(4, uris.size());

      // Ensure even the unknowns get checked.
      transport.add(false, "tcp://no.existing.hostname:61616");

      uris = getRegisteredUrlsFromPrivateField(transport);

      assertEquals(4, uris.size());

      transport.add(false, uriArray);

      assertEquals(4, uris.size());
   }

   @SuppressWarnings("unchecked")
   private Collection<URI> getRegisteredUrlsFromPrivateField(FailoverTransport failoverTransport) throws SecurityException, NoSuchFieldException, IllegalAccessException {
      Field urisField = failoverTransport.getClass().getDeclaredField("uris");
      urisField.setAccessible(true);
      return (Collection<URI>) urisField.get(failoverTransport);
   }
}
