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/*
 * Copyright (c) 2007 through 2024 David Berkman
 *
 * This file is part of the SmallMind Code Project.
 *
 * The SmallMind Code Project is free software, you can redistribute
 * it and/or modify it under either, at your discretion...
 *
 * 1) The terms of GNU Affero General Public License as published by the
 * Free Software Foundation, either version 3 of the License, or (at
 * your option) any later version.
 *
 * ...or...
 *
 * 2) The terms of the Apache License, Version 2.0.
 *
 * The SmallMind Code Project 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
 * General Public License or Apache License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * and the Apache License along with the SmallMind Code Project. If not, see
 *  or .
 *
 * Additional permission under the GNU Affero GPL version 3 section 7
 * ------------------------------------------------------------------
 * If you modify this Program, or any covered work, by linking or
 * combining it with other code, such other code is not for that reason
 * alone subject to any of the requirements of the GNU Affero GPL
 * version 3.
 */
package org.smallmind.claxon.registry.meter;

import java.util.concurrent.TimeUnit;
import org.smallmind.claxon.registry.Clock;
import org.smallmind.claxon.registry.Quantity;
import org.smallmind.claxon.registry.Window;
import org.smallmind.claxon.registry.aggregate.Pursued;

public class Trace implements Meter {

  private final Pursued pursued;
  private final Window[] windows;

  public Trace (Clock clock, TimeUnit windowTimeUnit, Window... windows) {

    long[] windowTimes = new long[windows.length];
    int index = 0;

    this.windows = windows;

    for (Window window : windows) {
      windowTimes[index++] = window.getValue();
    }

    pursued = new Pursued(clock, windowTimeUnit, windowTimes);
  }

  @Override
  public void update (long value) {

    pursued.update(value);
  }

  @Override
  public Quantity[] record () {

    Quantity[] quantities = new Quantity[windows.length];
    double[] values = pursued.getMovingAverages();
    int index = 0;

    for (Window window : windows) {
      quantities[index] = new Quantity(window.getName(), values[index++]);
    }

    return quantities;
  }
}