/*

 * Copyright 2013-2022 Step Function I/O, LLC

 *

 * Licensed to Green Energy Corp (www.greenenergycorp.com) and Step Function I/O

 * LLC (https://stepfunc.io) under one or more contributor license agreements.

 * See the NOTICE file distributed with this work for additional information

 * regarding copyright ownership. Green Energy Corp and Step Function I/O LLC license

 * 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.

 */

#ifndef OPENDNP3_EVENTTRIGGERS_H

#define OPENDNP3_EVENTTRIGGERS_H

#include "opendnp3/app/BaseMeasurementTypes.h"

namespace opendnp3

{

namespace measurements

{

    template<class T, class U> bool IsEvent(const T& val1, const T& val2, T deadband)

    {

        // T can be unsigned data type so std::abs won't work since it only directly supports signed data types

        // If one uses std::abs and T is unsigned one will get an ambiguous override error.

        U diff = (val2 > val1) ? (static_cast<U>(val2) - static_cast<U>(val1))

                               : (static_cast<U>(val1) - static_cast<U>(val2));

        return diff > deadband;

    }

    bool IsEvent(const TypedMeasurement<double>& newMeas, const TypedMeasurement<double>& oldMeas, double deadband);

} // namespace measurements

} // namespace opendnp3

#endif