#include <vector>
#include "histogram.h"
#include "histogram_internal.h"

using namespace std;


void find_minmax(const vector<double>& numbers, double& min, double& max){
    if(numbers.empty())
    {
        return;
    }
     min = numbers[0];
     max = numbers[0];
    for (double x : numbers)
    {
        if (x < min)
        {
            min = x;
        }
        else if (x > max)
        {
            max = x;
        }
    }
}

vector<size_t>make_histogram(const vector<double>& numbers, size_t bin_count)
{
    double min, max;
    find_minmax(numbers, min, max);

    vector <size_t> bins(bin_count,0);


    double bin_size = (max-min)/bin_count;

    for (double number : numbers)
    {
        bool found = false;

        for (size_t j = 0; (j < bin_count - 1) && !found; j++)
        {
            auto lo = min + j * bin_size;
            auto hi = min + (j + 1) * bin_size;
            if (lo <= number && number < hi)
            {
                bins[j]++;
                found = true;
            }
        }

        if (!found)
        {
            bins[bin_count - 1]++;
        }
    }
    return bins;
}