#ifndef __NN__
#define __NN__

#include <stdlib.h>
#include <stdio.h>
#include <stdint.h>
#include <string.h>
#include <math.h>
#include <unistd.h>
#include <openblas/cblas.h>

typedef struct Layer {
    double *weights, *bias;
    double (*activation)(double x);
    size_t neurons, input_nodes;
} Layer;

void nn_network_init_weights(Layer *network, size_t nmemb, size_t input_cols);
void nn_network_free_weights(Layer *network, size_t nmemb);

void nn_layer_forward(Layer layer, double *out, size_t out_shape[2], double *input, size_t input_shape[2]); //TODO
void nn_layer_backward(Layer *layer, double *out, size_t out_shape[2]); //TODO

double sigmoid(double x);
double relu(double x);
double identity(double x);
#endif