/* LanguageTool, a natural language style checker
 * Copyright (C) 2018 Daniel Naber (http://www.danielnaber.de)
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301
 * USA
 */
package org.languagetool.server;

import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.atomic.AtomicInteger;

class RequestCounter {

  private final AtomicInteger reqCount = new AtomicInteger();
  private final AtomicInteger handleCount = new AtomicInteger();
  private final Map<Integer, String> handleIps = new ConcurrentHashMap<>();

  int getHandleCount() {
    return handleCount.get();
  }

  int getRequestCount() {
    return reqCount.get();
  }
  
  void incrementHandleCount(String ip, int uniqueId) {
    handleCount.incrementAndGet();
    handleIps.put(uniqueId, ip);
  }

  int incrementRequestCount() {
    return reqCount.incrementAndGet();
  }

  void decrementHandleCount(int uniqueId) {
    handleCount.decrementAndGet();
    handleIps.remove(uniqueId);
  }

  int getDistinctIps() {
    Set<String> ips = new HashSet<>();
    for (Map.Entry<Integer, String> entry : handleIps.entrySet()) {
      ips.add(entry.getValue());
    }
    return ips.size();
  }
}
