#pragma once

#ifndef utils_h
#define utils_h

#include <Eigen/Dense>
#include <iostream>

#define DEBUG 0
#define INF 1e9
#define CHANNEL_NUMBER 4096

using namespace std;
using std::string;
using std::to_string;

double dataMax(std::vector<double> data) {
    double x, m = -INF;
    for (int i = 0; i < data.size(); i++) {
        x = data.at(i);
        m = std::max(m, x);
    }
    return m;
}

double dataAvg(std::vector<double> data) {
    double m = 0;
    for (int i = 0; i < data.size(); i++) m += data.at(i);
    return m / data.size();
}

double dataStd(std::vector<double> data) {
    double m = 0;
    double mu = dataAvg(data);
    for (int i = 0; i < data.size(); i++) m += std::pow(data.at(i) - mu, 2);
    return m / (data.size() - 1);
}

double dataMax2D(std::vector<Eigen::Vector2d> data) {
    double m = -INF;
    for (int i = 0; i < data.size(); i++) {
        Eigen::Vector2d &point = data.at(i);
        m = std::max(m, point(1));
    }
    return m;
}

double dataAvg2D(std::vector<Eigen::Vector2d> data) {
    int n = 0;
    double m = 0;
    for (int i = 0; i < data.size(); i++) {
        Eigen::Vector2d &point = data.at(i);
        n += point(1);
        m += point(0) * point(1);
    }
    return m / n;
}

double dataStd2D(std::vector<Eigen::Vector2d> data) {
    int n = 0;
    double m = 0;
    double mu = dataAvg2D(data);
    for (int i = 0; i < data.size(); i++) {
        Eigen::Vector2d &point = data.at(i);
        n += point(1);
        m += std::pow(point(0) - mu, 2) * point(1);
    }
    return std::sqrt(m / (n - 1));
}

double dataMax2DInd(std::vector<Eigen::Vector2d> data) {
    double x = 0, m = -INF;
    for (int i = 0; i < data.size(); i++) {
        Eigen::Vector2d &point = data.at(i);
        if (point(1) > m) {
            x = point(0);
            m = point(1);
        }
    }
    return x;
}

double dataStd2DSQRT(std::vector<Eigen::Vector2d> data) { return std::sqrt(dataMax2D(data)); }

string rmString(string str, string substr) {
    int pos;
    int len = substr.length();
    while (true) {
        pos = str.find(substr);
        if (pos < 0) break;
        str.erase(pos, len);
    }
    return str;
}

#endif