/*
 * The MIT License
 * Copyright © 2014-2019 Ilkka Seppälä
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

package com.iluwatar.throttling;

import java.util.Map;
import java.util.Map.Entry;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.atomic.AtomicLong;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * A class to keep track of the counter of different Tenants.
 *
 * @author drastogi
 */
public final class CallsCount {

  private static final Logger LOGGER = LoggerFactory.getLogger(CallsCount.class);
  private final Map<String, AtomicLong> tenantCallsCount = new ConcurrentHashMap<>();

  /**
   * Add a new tenant to the map.
   *
   * @param tenantName name of the tenant.
   */
  public void addTenant(String tenantName) {
    tenantCallsCount.putIfAbsent(tenantName, new AtomicLong(0));
  }

  /**
   * Increment the count of the specified tenant.
   *
   * @param tenantName name of the tenant.
   */
  public void incrementCount(String tenantName) {
    tenantCallsCount.get(tenantName).incrementAndGet();
  }

  /**
   * Get count of tenant based on tenant name.
   *
   * @param tenantName name of the tenant.
   * @return the count of the tenant.
   */
  public long getCount(String tenantName) {
    return tenantCallsCount.get(tenantName).get();
  }

  /**
   * Resets the count of all the tenants in the map.
   */
  public void reset() {
    LOGGER.debug("Resetting the map.");
    tenantCallsCount.replaceAll((k, v) -> new AtomicLong(0));
  }
}
