/*
 * Copyright (c) 2020, Rapprise.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this
 *    list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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 */

#ifndef AUTO_TRADER_STRATEGIES_STRATEGIES_UTILS_H
#define AUTO_TRADER_STRATEGIES_STRATEGIES_UTILS_H

#include "line.h"

namespace auto_trader {
namespace strategies {
namespace utils {

static void calculateSma(const Line& inputLine, int period, Line* outLine) {
  outLine->clear();

  auto inputLineSize = inputLine.getSize();
  double sum = 0.0;
  int fromPoint = 0;

  for (int index = period; index <= inputLineSize; ++index) {
    for (int currentPointIndex = fromPoint; currentPointIndex < index; ++currentPointIndex) {
      auto currentPoint = inputLine.getPoint(currentPointIndex);
      sum += currentPoint;
    }

    double sma = sum / period;
    outLine->addPoint(sma);

    ++fromPoint;
    sum = 0.0;
  }
}

}  // namespace utils
}  // namespace strategies
}  // namespace auto_trader

#endif  // AUTO_TRADER_STRATEGIES_STRATEGIES_UTILS_H
