#pragma once

#include "./ActivationFunction.h"

#include <cassert>

namespace NeuralNetwork {
namespace ActivationFunction {

	class Linear: public ActivationFunction {
		public:
			Linear(const float &lambdaP=1.0): lambda(lambdaP) {}

			inline virtual float derivatedOutput(const float &,const float &) const override { return lambda;  }

			inline virtual float operator()(const float &x) const override { return x*lambda; };

			virtual ActivationFunction* clone() const override {
				return new Linear(lambda);
			}

			virtual SimpleJSON::Type::Object serialize() const override {
				return {{"class", "NeuralNetwork::ActivationFunction::Linear"}, {"lambda", lambda}};
			}

			static std::unique_ptr<Linear> deserialize(const SimpleJSON::Type::Object &obj) {
				return std::unique_ptr<Linear>(new Linear(obj["lambda"].as<double>()));
			}

		protected:
			float lambda;
			NEURAL_NETWORK_REGISTER_ACTIVATION_FUNCTION(NeuralNetwork::ActivationFunction::Linear, Linear::deserialize)
	};
}
}