#include <boost/serialization/export.hpp>
#include <iostream>
#include "NeuronLinearSaturated.h"
#include "NeuronBinary.h"
#include "NeuronSerialization.h"
#include "NeuronLinearSaturatedSerialization.h"
#include "exceptions.h"

BOOST_CLASS_EXPORT_IMPLEMENT(lib4neuro::NeuronLinearSaturated);

namespace lib4neuro {
    NeuronLinearSaturated::NeuronLinearSaturated(double saturation_point) {
		this->saturation_point = saturation_point;
	}

    double NeuronLinearSaturated::activate(double x,
                                     double b) {
		if (x + b < 0) {
			return 0.0;
		}
		else if (x + b > this->saturation_point) {
			return this->saturation_point;
		}
		else {
			return x + b;
		}
    }

    double NeuronLinearSaturated::activation_function_eval_derivative_bias(double x,
                                                                		 double b) {
        // f'(0) = 0 for the purposes of training
		if (x + b < 0) {
			return 0.0;
		}
		else if (x + b > this->saturation_point) {
			return 0.0;
		}
		else {
			return 1.0;
		}
    }

    double NeuronLinearSaturated::activation_function_eval_derivative(double x,
                                                                double b) {
        // f'(0) = 0 for the purposes of training
		if (x + b < 0) {
			return 0.0;
		}
		else if (x + b > this->saturation_point) {
			return 0.0;
		}
		else {
			return 1.0;
		}
    }

    Neuron* NeuronLinearSaturated::get_derivative() {
        THROW_NOT_IMPLEMENTED_ERROR("The derivative of Linear Saturated neuron is not implemented yet");
    }


}