/*
 * 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
 * <br>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <br>
 * 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.artemis.tests.integration.plugin;

import static org.junit.jupiter.api.Assertions.assertEquals;

import io.micrometer.core.instrument.Meter;
import org.apache.activemq.artemis.core.config.MetricsConfiguration;
import org.apache.activemq.artemis.core.server.ActiveMQServer;
import org.apache.activemq.artemis.core.server.metrics.plugins.SimpleMetricsPlugin;
import org.apache.activemq.artemis.tests.util.ActiveMQTestBase;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;

public class SystemMetricsTest extends ActiveMQTestBase {

   @Override
   @BeforeEach
   public void setUp() throws Exception {
      super.setUp();
   }

   String[] fileDescriptorsMetrics = new String[] {"process.files.open", "process.files.max"};
   String[] processorMetrics = new String[] {"system.cpu.count", "system.load.average.1m", "system.cpu.usage", "process.cpu.usage"};
   String[] uptimeMetrics = new String[] {"process.uptime", "process.start.time"};

   @Test
   public void testFileDescriptorsMetricsPositive() throws Exception {
      internalTestMetrics(true, false, true, false, false, fileDescriptorsMetrics);
   }

   @Test
   public void testFileDescriptorsMetricsNegative() throws Exception {
      internalTestMetrics(false, false, false, false, false, fileDescriptorsMetrics);
   }

   @Test
   public void testProcessorMetricsPositive() throws Exception {
      internalTestMetrics(true, false, false, true, false, processorMetrics);
   }

   @Test
   public void testProcessorMetricsNegative() throws Exception {
      internalTestMetrics(false, false, false, false, false, processorMetrics);
   }

   @Test
   public void testUptimeMetricsPositive() throws Exception {
      internalTestMetrics(true, false, false, false, true, uptimeMetrics);
   }

   @Test
   public void testUptimeMetricsNegative() throws Exception {
      internalTestMetrics(false, false, false, false, false, uptimeMetrics);
   }

   private void internalTestMetrics(boolean found, boolean diskSpace, boolean fileDescriptors, boolean processor, boolean uptime, String... matches) throws Exception {
      ActiveMQServer server = createServer(false, createDefaultInVMConfig()
         .setMetricsConfiguration(new MetricsConfiguration()
                                     .setPlugin(new SimpleMetricsPlugin().init(null))
                                     .setFileDescriptors(fileDescriptors)
                                     .setProcessor(processor)
                                     .setUptime(uptime)));
      server.start();
      boolean result = false;
      String brokerTagValue = "";
      for (Meter.Id meterId : MetricsPluginTest.getMetrics(server).keySet()) {
         for (String match : matches) {
            if (meterId.getName().startsWith(match)) {
               result = true;
               brokerTagValue = meterId.getTag("broker");
               break;
            }
         }
      }

      assertEquals(found, result);
      if (found) {
         assertEquals(brokerTagValue, server.getConfiguration().getName());
      }
   }
}
