#pragma once
#include "util.h"
#include <random>

//using RNG = std::mt19937;
using RNG = std::minstd_rand;
extern RNG eng;

void set_rand_seed(int seed);
void add_random_noise(const VectorXd& x, double sigma, VectorXd& result);
void set_random_mags(VectorXd& x, double sigma);
void initialize_random_noise(VectorXd& x, double sigma, size_t size);
void initialize_random_noise(std::vector<std::pair<double, VectorXd>>& xvec, double sigma, bool dual_problem);
void initialize_random_noise(std::vector<std::pair<double, VectorXd>>& xvec, const VectorXd& guess, double sigma);
VectorXd shuffle_x(const VectorXd& x);
void make_symmetric_o4(VectorXd& x);

double my_optimizer(double (*objective_function)(const VectorXd&), VectorXd& result, int max_iters,
                   double sigma, double beta, int clusters, bool use_symmetry, bool dual_problem);
void study_sample(double (*objective_function)(const VectorXd&), VectorXd& result, int max_iters,
                  int clusters, double sigma, double beta, bool use_symmetry);