/*
    * 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.maven.slf4j;
  
  import java.util.HashMap;
  import java.util.Map;
  import java.util.concurrent.atomic.AtomicReference;
  
  import org.apache.maven.logging.api.LogLevelRecorder;
  
  /**
   * Responsible for keeping state of whether the threshold of the --fail-on-severity flag has been hit.
   */
  public class DefaultLogLevelRecorder implements LogLevelRecorder {
      private static final Map<String, Level> ACCEPTED_LEVELS = new HashMap<>();
  
      static {
          ACCEPTED_LEVELS.put("WARN", Level.WARN);
          ACCEPTED_LEVELS.put("WARNING", Level.WARN);
          ACCEPTED_LEVELS.put("ERROR", Level.ERROR);
      }
  
      private Level maxAllowed;
      private final AtomicReference<Level> maxReached = new AtomicReference<>(Level.DEBUG);
  
      public DefaultLogLevelRecorder(String threshold) {
          this(determineThresholdLevel(threshold));
      }
  
      public DefaultLogLevelRecorder(Level maxAllowed) {
          this.maxAllowed = maxAllowed;
      }
  
      @Override
      public boolean hasReachedMaxLevel() {
          return maxReached.get().ordinal() > maxAllowed.ordinal();
      }
  
      @Override
      public Level getMaxLevelReached() {
          return maxReached.get();
      }
  
      @Override
      public Level getMaxLevelAllowed() {
          return maxAllowed;
      }
  
      @Override
      public void setMaxLevelAllowed(Level level) {
          this.maxAllowed = level;
      }
  
      private static Level determineThresholdLevel(String input) {
          final Level result = ACCEPTED_LEVELS.get(input);
          if (result == null) {
              String message = String.format(
                      "%s is not a valid log severity threshold. Valid severities are WARN/WARNING and ERROR.", input);
              throw new IllegalArgumentException(message);
          }
          return result;
      }
  
      public void record(org.slf4j.event.Level logLevel) {
          Level level =
                  switch (logLevel) {
                      case TRACE, DEBUG -> Level.DEBUG;
                      case INFO -> Level.INFO;
                      case WARN -> Level.WARN;
                      case ERROR -> Level.ERROR;
                  };
          while (true) {
              Level r = maxReached.get();
              if (level.ordinal() > r.ordinal()) {
                  if (!maxReached.compareAndSet(r, level)) {
                      continue;
                  }
              }
              break;
          }
      }
  
      public boolean metThreshold() {
         return maxReached.get().ordinal() >= maxAllowed.ordinal();
     }
 }