#ifndef NLAYER_H
#define NLAYER_H

#include <stdlib.h>
#include <vector>
#include <cmath>

#include <QDebug>
#include <QString>

using namespace std;

const double sigma_a = -2.0;   // -a
//const double speed = 1.0;

//! ?????????????? ? ????????? 0..1
inline double normalize(double val, double min, double max)
{
    if (val>max) val=max;
    if (val<min) val=min;
    return ((val-min)/(max-min));
}

//! ???????? ??????????????
inline double denormalize(double val, double min, double max)
{
    return (val*(max-min) + min);
}

//! ????????? ?????? ??? ?????????? ?????????
class Dataset
{
public:
    Dataset(int rows, int cols);
    ~Dataset();
    int rows;
    int cols;
    int row_width;  // ?????? ?????? ? ?????????
    double *data;
};

//! ???? ????????
class NLayer
{
public:
    NLayer(int percept_count, NLayer *previous_layer = NULL);
    NLayer(const NLayer& layer); // prev_layer ?????????? ?????!
    ~NLayer();
    double *weights;    // ???????? ?????. ????????? = b, ??? ???? xn = +1
    int percept_cnt;    // ?????????? ????????
    int weights_cnt;    // ????? ?????????? ?????
    double *values;     // ???????? ???????? ????????
    double *temp_val;   // ????????? ???????? ???????. ??? ????????? ????????

    NLayer *prev_layer; // ?????????? ????. NULL - ???????
    int activation_func; // 0 - ?????????????, 1 - ???????
};

//!< ????????? ????
class NNetwork
{
public:
    //! ?????????? ???????? ?? ??????? ????, ?????? ?????????? ???????? ? ??????? ?????, ?????????? ???????? ? ???????? ????
    NNetwork(int inputs, vector<int> hidden_layers, int outputs);
    NNetwork(const NNetwork& nn);   //! ???????????

    ~NNetwork();

    //! ?????????? ???????? ???????? ????
    vector<double> calc_output(vector<double>& input);

    //! ??????? ????????? (???? ????????)
    void train(const Dataset &dataset, double speed);

    //! ?????? ?????????????
    void dumpCoeff();

    //! ????????? ????????? ????????????? ???? (??? ????????????? ?????????)
    void mutate(double amp, int freq);

protected:
    void updateState();
    // ????
    vector<NLayer*> layers;
};

#endif // NLAYER_H