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   * 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.kafka.connect.runtime.rest.resources;
  
  import org.apache.kafka.common.utils.LogCaptureAppender;
  import org.apache.kafka.connect.errors.NotFoundException;
  import org.apache.kafka.connect.runtime.Herder;
  import org.apache.kafka.connect.runtime.rest.entities.LoggerLevel;
  import org.apache.kafka.connect.runtime.rest.errors.BadRequestException;
  
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  import org.junit.jupiter.api.extension.ExtendWith;
  import org.mockito.Mock;
  import org.mockito.junit.jupiter.MockitoExtension;
  import org.mockito.junit.jupiter.MockitoSettings;
  import org.mockito.quality.Strictness;
  import org.slf4j.event.Level;
  
  import java.util.Arrays;
  import java.util.Collections;
  import java.util.List;
  
  import jakarta.ws.rs.core.Response;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertNull;
  import static org.junit.jupiter.api.Assertions.assertThrows;
  import static org.mockito.Mockito.verify;
  import static org.mockito.Mockito.when;
  
  @ExtendWith(MockitoExtension.class)
  @MockitoSettings(strictness = Strictness.STRICT_STUBS)
  public class LoggingResourceTest {
  
      private LoggingResource loggingResource;
  
      @Mock
      private Herder herder;
  
      @BeforeEach
      public void setup() {
          loggingResource = new LoggingResource(herder);
      }
  
      @Test
      public void testGetLevelNotFound() {
          final String logger = "org.apache.rostropovich";
          when(herder.loggerLevel(logger)).thenReturn(null);
          assertThrows(
                  NotFoundException.class,
                  () -> loggingResource.getLogger(logger)
          );
      }
  
      @Test
      public void testGetLevel() {
          final String logger = "org.apache.kafka.producer";
          final LoggerLevel expectedLevel = new LoggerLevel(Level.WARN.toString(), 976L);
          when(herder.loggerLevel(logger)).thenReturn(expectedLevel);
  
          Response response = loggingResource.getLogger(logger);
          assertEquals(Response.Status.OK.getStatusCode(), response.getStatus());
          LoggerLevel actualLevel = (LoggerLevel) response.getEntity();
  
          assertEquals(
                  expectedLevel,
                  actualLevel
          );
      }
  
      @Test
      public void setLevelWithEmptyArgTest() {
          for (String scope : Arrays.asList("worker", "cluster", "N/A", null)) {
              assertThrows(
                      BadRequestException.class,
                      () -> loggingResource.setLevel(
                              "@root",
                              Collections.emptyMap(),
                              scope
                      )
              );
          }
      }
  
      @Test
      public void setLevelWithInvalidArgTest() {
          for (String scope : Arrays.asList("worker", "cluster", "N/A", null)) {
              assertThrows(
                      NotFoundException.class,
                      () -> loggingResource.setLevel(
                              "@root",
                              Collections.singletonMap("level", "HIGH"),
                              scope
                      )
              );
          }
      }
  
      @Test
      public void testSetLevelDefaultScope() {
          testSetLevelWorkerScope(null, true);
      }
  
      @Test
      public void testSetLevelInvalidScope() {
          testSetLevelWorkerScope("kip-976", true);
      }
  
      @Test
      public void testSetLevelWorkerScope() {
          testSetLevelWorkerScope("worker", false);
      }
  
      @SuppressWarnings("unchecked")
      private void testSetLevelWorkerScope(String scope, boolean expectWarning) {
          final String logger = "org.apache.kafka.connect";
          final String level = "TRACE";
          final List<String> expectedLoggers = Arrays.asList(
                  "org.apache.kafka.connect",
                  "org.apache.kafka.connect.runtime.distributed.DistributedHerder"
          );
          when(herder.setWorkerLoggerLevel(logger, level)).thenReturn(expectedLoggers);
  
          List<String> actualLoggers;
          try (LogCaptureAppender logCaptureAppender = LogCaptureAppender.createAndRegister(LoggingResource.class)) {
              Response response = loggingResource.setLevel(logger, Collections.singletonMap("level", level), scope);
              assertEquals(Response.Status.OK.getStatusCode(), response.getStatus());
              actualLoggers = (List<String>) response.getEntity();
              long warningMessages = logCaptureAppender.getEvents().stream()
                      .filter(e -> "WARN".equals(e.getLevel()))
                      .count();
              if (expectWarning) {
                  assertEquals(1, warningMessages);
              } else {
                  assertEquals(0, warningMessages);
              }
          }
  
          assertEquals(expectedLoggers, actualLoggers);
      }
  
      @Test
      public void testSetLevelClusterScope() {
          final String logger = "org.apache.kafka.connect";
          final String level = "TRACE";
  
          Response response = loggingResource.setLevel(logger, Collections.singletonMap("level", level), "cluster");
  
          assertEquals(Response.Status.NO_CONTENT.getStatusCode(), response.getStatus());
          assertNull(response.getEntity());
  
          verify(herder).setClusterLoggerLevel(logger, level);
      }
  
  }
  